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University of Texas – Austin
1.
Gokkus, Enes.
Mist cooling technology for thermoelectric power plants.
Degree: MSin Engineering, Thermal-Fluid Systems, 2014, University of Texas – Austin
URL: http://hdl.handle.net/2152/39133 
► A novel mist-based cooling concept is analyzed with the objective of reducing water consumption in thermoelectric power plants. Additionally, this concept offers the potential to…
(more)
▼ A novel mist-based
cooling concept is analyzed with the objective of reducing water consumption in thermoelectric power plants. Additionally, this concept offers the potential to increase electricity generation capacity by lowering the steam condensation temperature. The mist-based
cooling concept consists of two independent technologies. The first technology consists of replacing the
cooling tower with a two stage heat exchanger consisting of air-cooled and water mist-cooled heat exchangers. The mist-cooled heat exchanger chills the
cooling water to near wet bulb temperature ambients which enables lowering of condenser pressures and temperatures. The mist is a saturated air stream at wet bulb temperatures obtained by adding water droplets to ambient air. The air-water ratios and droplet sizes can be optimized to reach wet bulb temperatures with minimum water consumption. The enhanced control of evaporation through mist
cooling will allow the mist to reach closer to wet bulb temperatures than
cooling towers. The second technology consists of replacing the shell-and-tube condenser with a direct contact condenser, wherein the steam from the Rankine cycle condenses on water mist streams. The large area offered by mist droplets increases heat transfer rates significantly, resulting in compact and low maintenance condensers. Technical and techno-economic analyses are carried out to map the potential of mist
cooling technology. The technical analyses show that mist
cooling technology can reduce water consumption by up to 65 %, compared to present-day
cooling towers of the same power output. Furthermore, by reducing the condenser pressure, the electricity generation capacity can be increased by 4 % while still consuming less water than existing
cooling towers. First-order techno-economic analyses have also been conducted to quantify the economic benefits of mist
cooling for thermoelectric power plants in Texas. These analyses reveal that mist
cooling technology can greatly help 17 out of 18 coal-fired power plants in Texas. It is expected that this technology will significantly benefit other U.S. power plants located in water-stressed areas.
Advisors/Committee Members: Bahadur, Vaibhav (advisor), Matthews, Ronald D. (committee member).
Subjects/Keywords: Mist cooling; Evaporative cooling
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APA (6th Edition):
Gokkus, E. (2014). Mist cooling technology for thermoelectric power plants. (Masters Thesis). University of Texas – Austin. Retrieved from http://hdl.handle.net/2152/39133
Chicago Manual of Style (16th Edition):
Gokkus, Enes. “Mist cooling technology for thermoelectric power plants.” 2014. Masters Thesis, University of Texas – Austin. Accessed April 10, 2021.
http://hdl.handle.net/2152/39133.
MLA Handbook (7th Edition):
Gokkus, Enes. “Mist cooling technology for thermoelectric power plants.” 2014. Web. 10 Apr 2021.
Vancouver:
Gokkus E. Mist cooling technology for thermoelectric power plants. [Internet] [Masters thesis]. University of Texas – Austin; 2014. [cited 2021 Apr 10].
Available from: http://hdl.handle.net/2152/39133.
Council of Science Editors:
Gokkus E. Mist cooling technology for thermoelectric power plants. [Masters Thesis]. University of Texas – Austin; 2014. Available from: http://hdl.handle.net/2152/39133
Halmstad University
2.
Åhlund, Anton.
Solar Cooling : -A study of two thermal systems.
Degree: Energy Science, 2015, Halmstad University
URL: http://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-28454
► Electricity-driven air-conditioning is energy-intensive and puts a strain to many grids during hot periods in warm climates. Solar thermal cooling could be an alternative…
(more)
▼ Electricity-driven air-conditioning is energy-intensive and puts a strain to many grids during hot periods in warm climates. Solar thermal cooling could be an alternative to conventional cooling, using a renewable energy source and supplying the most energy during peak demand periods with insignificant effect to the electric grid. Office buildings in warm climates have high cooling loads, naturally peaking during daytime because of occupancy and ambient temperature. Thus, office buildings have a seemingly advantageous relationship between the possible supply of solar thermal energy and cooling demand. With this background, solar cooling systems for two office buildings with the same dimensions are investigated, placed in a tropical- and a sub-tropical location. There are great differences in the design conditions for solar cooling systems in the tropics and the sub-tropics, between the chosen locations Manila and Abu Dhabi more specifically. Manila has a quite evenly distributed cooling load while Abu Dhabi has a strongly pronounced summer season with very high maximum cooling loads, while the winter temperatures are relatively low. The prior described conditions creates a big difference between loads throughout the year, making a thermal chiller less effective in this aspect. However Abu Dhabi is expected to have an overall smoother- and ultimately a more high performance solar cooling system due to lower humidity, which facilitates the important cooling of the chiller. Evacuated tube collectors were used at both sites, where the collectors in Manila needs to be larger relative to the chiller cooling capacity, in order to compensate for the irregularity of direct solar radiation. The electricity price in Abu Dhabi is too low for the solar cooling system to be economically feasible compared to a conventional system, where the net values over 20 years are 163 000 € and 127 000 €, respectively. Manila has on its hand a very high price for electricity, making the 20-year net values for both the solar cooling- and the conventional system approximately 170 000 €.
Subjects/Keywords: solar cooling; thermal cooling; absorption cooling; adsorption cooling; tropics; sub-tropics
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APA (6th Edition):
Åhlund, A. (2015). Solar Cooling : -A study of two thermal systems. (Thesis). Halmstad University. Retrieved from http://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-28454
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Åhlund, Anton. “Solar Cooling : -A study of two thermal systems.” 2015. Thesis, Halmstad University. Accessed April 10, 2021.
http://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-28454.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Åhlund, Anton. “Solar Cooling : -A study of two thermal systems.” 2015. Web. 10 Apr 2021.
Vancouver:
Åhlund A. Solar Cooling : -A study of two thermal systems. [Internet] [Thesis]. Halmstad University; 2015. [cited 2021 Apr 10].
Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-28454.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Åhlund A. Solar Cooling : -A study of two thermal systems. [Thesis]. Halmstad University; 2015. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-28454
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
3.
Korniliou, Sofia.
Ébullition dans les micro canaux : influence du rapport d'aspect sur le transfert thermique local : Local heat transfer measurements and aspect ratio influence during flow boiling in microscale.
Degree: Docteur es, Mécanique. Énergétique, matériaux, 2018, Valenciennes; University of Edinburgh
URL: http://www.theses.fr/2018VALE0002
► L’ébullition en micros canaux est une technique de refroidissement très prometteuse pour les composants en microélectronique. Ces derniers, de plus en plus miniaturisés, nécessitent souvent…
(more)
▼ L’ébullition en micros canaux est une technique de refroidissement très prometteuse pour les composants en microélectronique. Ces derniers, de plus en plus miniaturisés, nécessitent souvent la dissipation de densités de flux importantes, pouvant atteindre quelques MW m-2 pour maintenir des températures acceptables. L’objet de cette étude est de mieux comprendre les instabilités des écoulements, le transfert thermique par changement de phase tout comme l’effet des rapports de forme (a) sur l’apparition de sites de nucléation à la surface de micro canaux. L’analyse des échanges convectifs locaux lors de l’ébullition a été réalisée dans le cas de micro canaux de rapport de forme allant de 0.3 à 3 et de diamètres hydrauliques allant de 50 à 150 μm. Le banc d’essai a été instrumenté de manière à pourvoir mesurer simultanément les températures de surface à l’aide capteurs en film mince de nickel, de capteurs de pressions instantanées et de caméra rapide pour la visualisation du phénomène d’ébullition. Le chauffage du fluide a été réalisé à l’aide du dépôt en couche mince d’un film résistif en aluminium directement appliqué à la surface des micro canaux. L’étude expérimentale a permis d’analyser les phénomènes de changement de phase par ébullition, du transfert thermique local ainsi que la chute de pression de l’écoulement. En particulier, le travail expérimental a permis de mettre en évidence les effets sur le transfert, du rapport de forma a, de la température de sous refroidissement du fluide à l’entrée des canaux et de la dynamique de formation et de grossissement des bulles. Des fluctuations importantes de pression et de températures ont été enregistrées pour des températures de surfaces avoisinant les 250 °C. Les micro canaux avec a= 1.5 et Dh =120 μm, correspondent à la configuration la plus performante. Les mesures par thermographie infrarouge (IR) combinées à la visualisation par caméra rapide et aux mesures des fluctuations de pressions par capteurs piézoresitifs, ont été réalisées dans le cas de canaux en Polydimethylsiloxane (PDMS) de grand rapport de forme (a = 22) et de diamètre hydraulique Dh =192 μm. L’objectif était d’identifier des cartographies bidimensionnelles et instationnaires de coefficients d’échanges convectifs dans le cas d’un micro canal utilisant un fluide diélectrique le FC -72. La double visualisation par thermographie infrarouge et par caméra CCD rapide a permis de corréler la dynamique de l’ébullition, et notamment le grossissement des bulles, l’asséchement et ou le mouillage des parois, aux coefficients d’échanges convectifs locaux.
Flow boiling in microchannels is a promising technology for cooling of small-scale devices such as electronic chips, power rectifiers, radar arrays, chemical microreactors that require dissipating heat fluxes of several MW m-2 while maintaining constant temperature at the surface. Although flow boiling in macroscale provides higher performance than single-phase or pool boiling heat transfer, the advantages in microscale have not been yet completely justified.…
Advisors/Committee Members: Harmand, Souad (thesis director), Sefiane, Khellil (thesis director).
Subjects/Keywords: Refroidissement; Cooling
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APA (6th Edition):
Korniliou, S. (2018). Ébullition dans les micro canaux : influence du rapport d'aspect sur le transfert thermique local : Local heat transfer measurements and aspect ratio influence during flow boiling in microscale. (Doctoral Dissertation). Valenciennes; University of Edinburgh. Retrieved from http://www.theses.fr/2018VALE0002
Chicago Manual of Style (16th Edition):
Korniliou, Sofia. “Ébullition dans les micro canaux : influence du rapport d'aspect sur le transfert thermique local : Local heat transfer measurements and aspect ratio influence during flow boiling in microscale.” 2018. Doctoral Dissertation, Valenciennes; University of Edinburgh. Accessed April 10, 2021.
http://www.theses.fr/2018VALE0002.
MLA Handbook (7th Edition):
Korniliou, Sofia. “Ébullition dans les micro canaux : influence du rapport d'aspect sur le transfert thermique local : Local heat transfer measurements and aspect ratio influence during flow boiling in microscale.” 2018. Web. 10 Apr 2021.
Vancouver:
Korniliou S. Ébullition dans les micro canaux : influence du rapport d'aspect sur le transfert thermique local : Local heat transfer measurements and aspect ratio influence during flow boiling in microscale. [Internet] [Doctoral dissertation]. Valenciennes; University of Edinburgh; 2018. [cited 2021 Apr 10].
Available from: http://www.theses.fr/2018VALE0002.
Council of Science Editors:
Korniliou S. Ébullition dans les micro canaux : influence du rapport d'aspect sur le transfert thermique local : Local heat transfer measurements and aspect ratio influence during flow boiling in microscale. [Doctoral Dissertation]. Valenciennes; University of Edinburgh; 2018. Available from: http://www.theses.fr/2018VALE0002
University of Ottawa
4.
Yang, Yifan.
Personal-portable Cooling Garment Based on Adsorption Vacuum Membrane Evaporative Cooling
.
Degree: 2011, University of Ottawa
URL: http://hdl.handle.net/10393/19835
► A cutting edge man-portable AVMEC cooling garment was demonstrated to be able to provide sufficient cooling for personnel working at mediate activity loads. Studies were…
(more)
▼ A cutting edge man-portable AVMEC cooling garment was demonstrated to be able to provide sufficient cooling for personnel working at mediate activity loads. Studies were first carried out in a well controlled vacuum desiccator at room temperature to elucidate the effects of several key parameters on the performance of an AVEC device, which was similar to AVMEC except that membrane was not involved. Under the best condition, an average cooling capacity of 179 W/M2 was achieved in a period of four hours and cooling continued at a slowly declining rate for another four hours afterward. The temperature of water was maintained at approximately 12.5 °C after the pseudo steady state was established. Then, it was shown that the AVMEC cooling pads were able to provide a cooling capacity of 277.4 W/m2 in a 37 °C ambient environment (incubator). The temperature of the cooling core surface was maintained in a range of 20 – 21.8 °C in the one-hour test period. No power supply was required except for the initialization stage, which took 5 minutes. Furthermore, human subject tests with or without wearing NWBC (Nuclear Warfare Biological and Chemical) suit demonstrated that, a AVMEC garment composed of 12 cooling pads were able to maintain the core body temperature of the subjects below 38.5 °C for up to 90 minutes while the subject was walking on a treadmill at a speed of 2 miles per hour in an environment of 40 °C and 50% RH (relative humidity). These results indicate that the AVMEC garment is a promising man-portable personal cooling technology.
Subjects/Keywords: adsorption;
evaporative cooling;
personal microclimate cooling
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APA (6th Edition):
Yang, Y. (2011). Personal-portable Cooling Garment Based on Adsorption Vacuum Membrane Evaporative Cooling
. (Thesis). University of Ottawa. Retrieved from http://hdl.handle.net/10393/19835
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Yang, Yifan. “Personal-portable Cooling Garment Based on Adsorption Vacuum Membrane Evaporative Cooling
.” 2011. Thesis, University of Ottawa. Accessed April 10, 2021.
http://hdl.handle.net/10393/19835.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Yang, Yifan. “Personal-portable Cooling Garment Based on Adsorption Vacuum Membrane Evaporative Cooling
.” 2011. Web. 10 Apr 2021.
Vancouver:
Yang Y. Personal-portable Cooling Garment Based on Adsorption Vacuum Membrane Evaporative Cooling
. [Internet] [Thesis]. University of Ottawa; 2011. [cited 2021 Apr 10].
Available from: http://hdl.handle.net/10393/19835.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Yang Y. Personal-portable Cooling Garment Based on Adsorption Vacuum Membrane Evaporative Cooling
. [Thesis]. University of Ottawa; 2011. Available from: http://hdl.handle.net/10393/19835
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Baylor University
5.
Harmon, Weston V.
An experimental investigation of round and racetrack shaped jets for leading edge region cooling of gas turbine blades.
Degree: M.S.M.E., Mechanical Engineering., 2014, Baylor University
URL: http://hdl.handle.net/2104/9158
► Jet impingement is often utilized in the leading edge of actively cooled turbine airfoils to protect the blades from the extreme heat loads encountered within…
(more)
▼ Jet impingement is often utilized in the leading edge of actively cooled turbine airfoils to protect the blades from the extreme heat loads encountered within the engine. This thesis will discuss two experimental investigations that employ a traditional, steady state, copper plate technique to obtain regionally averaged Nusselt numbers on a concave surface, which models the leading edge of a turbine blade. The first experiment will investigate the effect of jet shape, orifice edge condition, jet-to-jet spacing, and relative jet length. The effect of inlet supply condition will also be investigated by implementing a radial bypass. The second experiment investigates the effect of rotation on both round and racetrack shaped impinging jets. Results show that racetrack shaped jets generally outperform circular jets both in a stationary test section, and under rotating conditions. Further, the effects of non-square edge conditions and radial bypass prove to be detrimental to heat transfer.
Advisors/Committee Members: Wright, Lesley Mae. (advisor), Honeywell Aerospace. (other).
Subjects/Keywords: Impingement cooling.; Gas turbine cooling.; Rotating impingement.
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APA (6th Edition):
Harmon, W. V. (2014). An experimental investigation of round and racetrack shaped jets for leading edge region cooling of gas turbine blades. (Masters Thesis). Baylor University. Retrieved from http://hdl.handle.net/2104/9158
Chicago Manual of Style (16th Edition):
Harmon, Weston V. “An experimental investigation of round and racetrack shaped jets for leading edge region cooling of gas turbine blades.” 2014. Masters Thesis, Baylor University. Accessed April 10, 2021.
http://hdl.handle.net/2104/9158.
MLA Handbook (7th Edition):
Harmon, Weston V. “An experimental investigation of round and racetrack shaped jets for leading edge region cooling of gas turbine blades.” 2014. Web. 10 Apr 2021.
Vancouver:
Harmon WV. An experimental investigation of round and racetrack shaped jets for leading edge region cooling of gas turbine blades. [Internet] [Masters thesis]. Baylor University; 2014. [cited 2021 Apr 10].
Available from: http://hdl.handle.net/2104/9158.
Council of Science Editors:
Harmon WV. An experimental investigation of round and racetrack shaped jets for leading edge region cooling of gas turbine blades. [Masters Thesis]. Baylor University; 2014. Available from: http://hdl.handle.net/2104/9158
KTH
6.
Johansson, Eric.
Optimization of Ground Source Cooling Combined with Free Cooling for Protected Sites.
Degree: Applied Thermodynamics and Refrigeration, 2012, KTH
URL: http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-98657
► Ground source cooling is commonly used for cooling of electronics in protected sites. Sometimes the boreholes are combined with free cooling from the air…
(more)
▼ Ground source cooling is commonly used for cooling of electronics in protected sites. Sometimes the boreholes are combined with free cooling from the air using a dry cooler to reduce the amount and length of the boreholes, which is the biggest part of the costs. The dry cooler can have two different running modes. In unloading mode the dry cooler is started at a certain temperature and the fans are slowed down at low temperatures so that the cooling power never exceeds the cooling demand. The extracted cooling is used to unload the boreholes. In recharging mode the dry cooler is started at a certain temperature and is operating at full capacity below this temperature. The excess cooling that is extracted in this mode is used to recharge the boreholes. The numerical simulation tool COMSOL Multiphysics was used to evaluate the borehole performance. The software can simulate tilted boreholes with good accuracy and makes it possible to adjust the geometry in any desired way. In this thesis, the performance of a 100 kW ground source cooling system is evaluated for a number of cases both with and without dry coolers in different running modes and sizes. The best solution in respect to life cycle cost, technical feasibility and environmental impact is chosen to be an unloading case with a dry cooler with 100 kW capacity at 8 °C. Using only boreholes gives less carbon dioxide emissions but much higher costs.
Subjects/Keywords: Cooling; Borehole; Ground Source; Free Cooling
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APA (6th Edition):
Johansson, E. (2012). Optimization of Ground Source Cooling Combined with Free Cooling for Protected Sites. (Thesis). KTH. Retrieved from http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-98657
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Johansson, Eric. “Optimization of Ground Source Cooling Combined with Free Cooling for Protected Sites.” 2012. Thesis, KTH. Accessed April 10, 2021.
http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-98657.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Johansson, Eric. “Optimization of Ground Source Cooling Combined with Free Cooling for Protected Sites.” 2012. Web. 10 Apr 2021.
Vancouver:
Johansson E. Optimization of Ground Source Cooling Combined with Free Cooling for Protected Sites. [Internet] [Thesis]. KTH; 2012. [cited 2021 Apr 10].
Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-98657.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Johansson E. Optimization of Ground Source Cooling Combined with Free Cooling for Protected Sites. [Thesis]. KTH; 2012. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-98657
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Virginia Tech
7.
Leblanc, Christopher N.
Design, Analysis, and Development of a Tripod Film Cooling Hole Design for Reduced Coolant Usage.
Degree: PhD, Mechanical Engineering, 2012, Virginia Tech
URL: http://hdl.handle.net/10919/19206
► This research has a small portion focused on interior serpentine channels, with the primary focus on improving the effectiveness of the film cooling technique through…
(more)
▼ This research has a small portion focused on interior serpentine channels, with the primary focus on improving the effectiveness of the film
cooling technique through the use of a new approach to film
cooling. This new approach uses a set of three holes sharing the same inlet and diverging from the central hole to form a three-legged, or tripod, design. The tripod design is examined in depth, in terms of geometric variations, through the use of flat plate and cascade rigs, with both transient and steady-state experiments. The flat plate tests provide a simplified setting in which to test the design in comparison to other geometries, and establish a baseline performance in a simple flow field that does not have the complications of surface curvature or mainstream pressure gradients. Cascade tests allow for testing of the design in a more realistic setting with curved surfaces and mainstream pressure gradients, providing important information about the performance of the design on suction and pressure surfaces of airfoils. Additionally, the cascade tests allow for an investigation into the aerodynamic penalties associated with the injection hole designs at various flow rates. Through this procedure the current state of film
cooling technology may be improved, with more effective surface coverage achieved with reduced coolant usage, and with reduced performance penalties for the engine as a whole. This research has developed a new film hole design that is manufacturable and durable, and provides a detailed analysis of its performance under a variety of flow conditions. This
cooling hole design provides 40% higher
cooling effectiveness while using 50% less coolant mass flow. The interior serpentine channel research provides comparisons between correlations and experiments for internal passages with realistic cross sections.
Advisors/Committee Members: Ekkad, Srinath V. (committeechair), Roy, Christopher John (committee member), Tafti, Danesh K. (committee member), Diller, Thomas E. (committee member), Ng, Wing Fai (committee member).
Subjects/Keywords: Heat Transfer; Gas Turbine Cooling; Film Cooling
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APA (6th Edition):
Leblanc, C. N. (2012). Design, Analysis, and Development of a Tripod Film Cooling Hole Design for Reduced Coolant Usage. (Doctoral Dissertation). Virginia Tech. Retrieved from http://hdl.handle.net/10919/19206
Chicago Manual of Style (16th Edition):
Leblanc, Christopher N. “Design, Analysis, and Development of a Tripod Film Cooling Hole Design for Reduced Coolant Usage.” 2012. Doctoral Dissertation, Virginia Tech. Accessed April 10, 2021.
http://hdl.handle.net/10919/19206.
MLA Handbook (7th Edition):
Leblanc, Christopher N. “Design, Analysis, and Development of a Tripod Film Cooling Hole Design for Reduced Coolant Usage.” 2012. Web. 10 Apr 2021.
Vancouver:
Leblanc CN. Design, Analysis, and Development of a Tripod Film Cooling Hole Design for Reduced Coolant Usage. [Internet] [Doctoral dissertation]. Virginia Tech; 2012. [cited 2021 Apr 10].
Available from: http://hdl.handle.net/10919/19206.
Council of Science Editors:
Leblanc CN. Design, Analysis, and Development of a Tripod Film Cooling Hole Design for Reduced Coolant Usage. [Doctoral Dissertation]. Virginia Tech; 2012. Available from: http://hdl.handle.net/10919/19206
Oregon State University
8.
Asumpinpong, Kasidid.
Development of a microchannel device for adsorption cooling application.
Degree: MS, Chemical Engineering, 2009, Oregon State University
URL: http://hdl.handle.net/1957/10672
► Single-layer and three-layer microchannel adsorption devices were fabricated by procedure that was newly developed. Aluminum was chosen for metal housing while the adsorption pair was…
(more)
▼ Single-layer and three-layer microchannel adsorption devices were fabricated by
procedure that was newly developed. Aluminum was chosen for metal housing while
the adsorption pair was silica gel and water. Each adsorption layer contained two
layers of 250 μm-thick silica gel. Both silica gel layers opened to the same layer of
adsorption channels. The layers of air flow channels were placed between two
adsorption layers, including over the top and below the bottom adsorption layers. Each
layer of adsorption channels and air flow channels contained array of six
microchannels. Each microchannel was 400 μm tall, 5.8 mm wide and 4.4 cm long.
The device was bonded by B-staged epoxy thin film at moderate temperature of
120°C. The overall dimensions of the fabricated device were 5 cm x 5 cm x 10.2 mm
for the three-layer device. A maximum coefficient of performance (COP) of 0.506 was
achieved at the evaporator temperature of 22°C, adsorption temperature of 23°C and
desorption temperature of 50°C. The highest specific
cooling power (SCP) obtained
was 601 W/kg silica gel when desorption temperature was increased to 70°C The
overall performance of the device improved slightly when the air flow rate was
increased. The COP increased by a factor of 2.4 when the number of adsorption layers
increased from 1 to 3. The results from simulation model agreed with the experimental
results and also showed that both COP and SCP decreased drastically when evaporator
temperature was far below the adsorption temperature.
Advisors/Committee Members: Rorrer, Gregory L. (advisor), Chang, Chih-hung (committee member).
Subjects/Keywords: Microchannel; Microelectronics – Cooling
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APA (6th Edition):
Asumpinpong, K. (2009). Development of a microchannel device for adsorption cooling application. (Masters Thesis). Oregon State University. Retrieved from http://hdl.handle.net/1957/10672
Chicago Manual of Style (16th Edition):
Asumpinpong, Kasidid. “Development of a microchannel device for adsorption cooling application.” 2009. Masters Thesis, Oregon State University. Accessed April 10, 2021.
http://hdl.handle.net/1957/10672.
MLA Handbook (7th Edition):
Asumpinpong, Kasidid. “Development of a microchannel device for adsorption cooling application.” 2009. Web. 10 Apr 2021.
Vancouver:
Asumpinpong K. Development of a microchannel device for adsorption cooling application. [Internet] [Masters thesis]. Oregon State University; 2009. [cited 2021 Apr 10].
Available from: http://hdl.handle.net/1957/10672.
Council of Science Editors:
Asumpinpong K. Development of a microchannel device for adsorption cooling application. [Masters Thesis]. Oregon State University; 2009. Available from: http://hdl.handle.net/1957/10672
Anna University
9.
Anbazhaghan N.
Studies on biomass assisted Absorption cooling
systems;.
Degree: Studies on biomass assisted Absorption cooling
systems, 2014, Anna University
URL: http://shodhganga.inflibnet.ac.in/handle/10603/28532
► India stands among the top five countries in fruits and vegetables newlineProduction However due to poor availability of power in rural areas only newline2 of…
(more)
▼ India stands among the top five countries in fruits
and vegetables newlineProduction However due to poor availability
of power in rural areas only newline2 of the produced vegetables is
preserved with the conventional type cold newlineStorages This
leads to loss of rural economy The conventional vapour
newlinecompression type cold storages require electrical mechanical
work for their newlineoperation and use working fluids which are
harmful to the environment In newlinethis context the vapour
absorption refrigeration type cold storages could be
newlineconsidered Since the vapour absorption refrigeration systems
are heat newlineoperated the required thermal energy could be
obtained from either waste newlineheat or renewable energy sources
newlineSince the production of fruits and vegetables is rural area
based newlinerenewable energy based heat operated absorption
systems find its applications newlineto overcome the drawbacks
mentioned earlier The biomass as the source of newlinefuel among
the renewable energy sources attracts significant attention due to
newlineits abundant availability and cost effective energy
harnessing techniques newline newline
appendix p195-235. reference
p236-244.
Advisors/Committee Members: Renganarayanan S.
Subjects/Keywords: Absorption cooling systems
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APA (6th Edition):
N, A. (2014). Studies on biomass assisted Absorption cooling
systems;. (Thesis). Anna University. Retrieved from http://shodhganga.inflibnet.ac.in/handle/10603/28532
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
N, Anbazhaghan. “Studies on biomass assisted Absorption cooling
systems;.” 2014. Thesis, Anna University. Accessed April 10, 2021.
http://shodhganga.inflibnet.ac.in/handle/10603/28532.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
N, Anbazhaghan. “Studies on biomass assisted Absorption cooling
systems;.” 2014. Web. 10 Apr 2021.
Vancouver:
N A. Studies on biomass assisted Absorption cooling
systems;. [Internet] [Thesis]. Anna University; 2014. [cited 2021 Apr 10].
Available from: http://shodhganga.inflibnet.ac.in/handle/10603/28532.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
N A. Studies on biomass assisted Absorption cooling
systems;. [Thesis]. Anna University; 2014. Available from: http://shodhganga.inflibnet.ac.in/handle/10603/28532
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
10.
Anwarulla, Mohammad.
Experimental and theoretical investigation on the effect
of geometric parameters in electronic component cooling using jet
impingement.
Degree: Mechanical Engineering, 2011, Jawaharlal Nehru Technological University
URL: http://shodhganga.inflibnet.ac.in/handle/10603/3483
► The present work deals with experimental and theoretical investigation on the effect of geometric parameters on the cooling of electronic components and sub assemblies in…
(more)
▼ The present work deals with experimental and
theoretical investigation on the effect of geometric parameters on
the cooling of electronic components and sub assemblies in an air
jet impingement cooling. To begin with an extensive literature
survey has been conducted from the published literature and
critically reviewed. In the process of literature review more than
100 relevant research papers are collected and a critical review is
carried out to understand the state of the art in chosen field of
investigation. Gaps in the published scientific literature are
identified and the lacuna is high lighted. The present experimental
investigation is an attempt to bridge some of the identified lacuna
in the literature. As a part of the present experimental
investigation a test rig has been designed, developed, fabricated,
tested and commissioned keeping in view of the functional and
operational requirements. Heat transfer coefficient have been
determined in the temperature range of 30 to 1000 C of component
temperature and in the range of Reynolds numbers from 5850 to 85000
of the jet. The geometric parameters like diameter of the jet and
the distance between the nozzle exit and the target have been
varied between 2 to 10. Three different geometric shapes of the
nozzle, viz., circular, square and rectangular, have been
investigated in the present work. The measured values of heat
transfer coefficient are non-XII dimensionlised. Variations of non
dimensional heat transfer coefficient have been represented as a
function of geometric and flow parameters. New correlations are
proposed based on the present experimental investigation. Results
of the present work are compared with the published literature and
discussed. Effect of nozzle aspect ratio on heat transfer rates
decrease as the nozzle to electronic component spacing increases.
The effect of nozzle aspect ratio on heat transfer is practically
independent of the jet Reynolds number. The experimental results of
the present investigation provide a good under standing of the
fluid flow and heat transfer characteristics of air impinging jets.
Uncertainty analysis has been conducted and typical range of
uncertainty is also presented. Finally the scope for extension of
present work is also identified.
List of publications p. xvii, Annexure p. 149-155,
References p. 156-171
Advisors/Committee Members: Rao, Vasudeva V, Sharma, K V.
Subjects/Keywords: Jet Impingement Cooling
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APA (6th Edition):
Anwarulla, M. (2011). Experimental and theoretical investigation on the effect
of geometric parameters in electronic component cooling using jet
impingement. (Thesis). Jawaharlal Nehru Technological University. Retrieved from http://shodhganga.inflibnet.ac.in/handle/10603/3483
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Anwarulla, Mohammad. “Experimental and theoretical investigation on the effect
of geometric parameters in electronic component cooling using jet
impingement.” 2011. Thesis, Jawaharlal Nehru Technological University. Accessed April 10, 2021.
http://shodhganga.inflibnet.ac.in/handle/10603/3483.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Anwarulla, Mohammad. “Experimental and theoretical investigation on the effect
of geometric parameters in electronic component cooling using jet
impingement.” 2011. Web. 10 Apr 2021.
Vancouver:
Anwarulla M. Experimental and theoretical investigation on the effect
of geometric parameters in electronic component cooling using jet
impingement. [Internet] [Thesis]. Jawaharlal Nehru Technological University; 2011. [cited 2021 Apr 10].
Available from: http://shodhganga.inflibnet.ac.in/handle/10603/3483.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Anwarulla M. Experimental and theoretical investigation on the effect
of geometric parameters in electronic component cooling using jet
impingement. [Thesis]. Jawaharlal Nehru Technological University; 2011. Available from: http://shodhganga.inflibnet.ac.in/handle/10603/3483
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Baylor University
11.
Elston, Cassius A., III.
Numerical prediction and correlation of leading edge jet impingement with varying jet shapes and flow conditions for gas turbine cooling.
Degree: M.S.M.E., Mechanical Engineering., 2013, Baylor University
URL: http://hdl.handle.net/2104/8827
► To increase the core power of gas turbine engines, the combustion temperature is elevated above the metallurgical limits of the internal components. As a consequence,…
(more)
▼ To increase the core power of gas turbine engines, the combustion temperature is elevated above the metallurgical limits of the internal components. As a consequence, active
cooling schemes are required to prevent the blades from melting. In this study, a numerical investigation of leading edge impingement
cooling was performed. The effects of jet Reynolds number, jet-to-target surface spacing, jet-to-jet spacing, target surface curvature, and jet aspect ratio on the target surface Nusselt numbers were quantified. In all cases, the jets were equally spaced and had fully filleted edges. The numerical results were utilized to develop an empirical correlation for the surface average Nusselt number. The correlation enables engine designers to accurately predict the heat flux on the blade wall, as well as identify the optimal leading edge geometry to minimize the amount of
cooling air required; thus, increasing the thermal efficiency of the gas turbine engine.
Advisors/Committee Members: Wright, Lesley Mae. (advisor), Honeywell Aerospace. (other).
Subjects/Keywords: Gas turbine cooling.
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APA (6th Edition):
Elston, Cassius A., I. (2013). Numerical prediction and correlation of leading edge jet impingement with varying jet shapes and flow conditions for gas turbine cooling. (Masters Thesis). Baylor University. Retrieved from http://hdl.handle.net/2104/8827
Chicago Manual of Style (16th Edition):
Elston, Cassius A., III. “Numerical prediction and correlation of leading edge jet impingement with varying jet shapes and flow conditions for gas turbine cooling.” 2013. Masters Thesis, Baylor University. Accessed April 10, 2021.
http://hdl.handle.net/2104/8827.
MLA Handbook (7th Edition):
Elston, Cassius A., III. “Numerical prediction and correlation of leading edge jet impingement with varying jet shapes and flow conditions for gas turbine cooling.” 2013. Web. 10 Apr 2021.
Vancouver:
Elston, Cassius A. I. Numerical prediction and correlation of leading edge jet impingement with varying jet shapes and flow conditions for gas turbine cooling. [Internet] [Masters thesis]. Baylor University; 2013. [cited 2021 Apr 10].
Available from: http://hdl.handle.net/2104/8827.
Council of Science Editors:
Elston, Cassius A. I. Numerical prediction and correlation of leading edge jet impingement with varying jet shapes and flow conditions for gas turbine cooling. [Masters Thesis]. Baylor University; 2013. Available from: http://hdl.handle.net/2104/8827
University of Melbourne
12.
Neshastehriz, Soudabeh.
Analyses of passive and low energy cooling systems for retrofitting office buildings in Melbourne.
Degree: 2016, University of Melbourne
URL: http://hdl.handle.net/11343/92016
► In recent years, concern about the future increase in energy consumption for cooling office buildings due to climate change has motivated the use of alternative…
(more)
▼ In recent years, concern about the future increase in energy consumption for cooling office buildings due to climate change has motivated the use of alternative cooling technologies. Development of passive and low energy cooling (PALENC) technologies is an example of the efforts being taken to alleviate this concern. Previous researchers have investigated the contribution of PALENC technologies to savings in energy consumption for cooling buildings. Few studies, however, have investigated the cost-effectiveness of applying PALENC technologies in office building retrofits. This study investigates the energy performance and cost-effectiveness of various PALENC technologies for retrofitting a typical office building in Melbourne.
The first part of this study examines the energy performance and financial evaluation of PALENC technologies using literature based analysis. The following PALENC technologies were initially explored: a) passive design features; b) night ventilation; c) ground cooling; d) direct and indirect evaporative cooling; e) night sky radiative cooling; f) chilled beam (radiant ceiling cooling) and g) slab cooling. Two most cost-effective PALENC technologies suitable for retrofitting a typical office building in Melbourne, namely passive design features and indirect evaporative cooling were identified. The second part of this research investigates the potential energy saving of selected passive designs features including shading instalment and window replacement. The investigated shading strategies were horizontal overhangs for north-, east- and west-facing windows and vertical fins for west- and east-facing windows. Four types of window glazing were investigated as window replacement strategies: single clear, single reflective, lowE double glazing and lowE plus reflective double glazing. TRNSYS simulations showed that installing external shading devices on a typical commercial office building in Melbourne can save cooling energy consumption by 0.6%–11%, depending on the type and orientation of the shading device applied. The energy performance of the different window types showed that the cooling energy reduction yielded by the reflective single glazing window is about 25%. The results of financial analysis showed that all of the selected passive design strategies have higher costs of conserved energy (CCEs), compared to the current cost of supplied electricity in Melbourne.
The third part of this study, investigates the energy and financial performance of indirect evaporative cooling (IEC) combined with selected passive design features for retrofitting a typical office building in Melbourne. TRNSYS simulations showed 60% saving in electricity consumption as compared to the conventional cooling system. The financial analysis using levelised cost of cooling (LCOC) indicated that replacing the current conventional cooling system with an IEC is cost-effective only if the current cooling system is in poor condition and needed to be replaced by a new one. It was also found that LCOC for applying IEC…
Subjects/Keywords: passive cooling; building
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APA (6th Edition):
Neshastehriz, S. (2016). Analyses of passive and low energy cooling systems for retrofitting office buildings in Melbourne. (Masters Thesis). University of Melbourne. Retrieved from http://hdl.handle.net/11343/92016
Chicago Manual of Style (16th Edition):
Neshastehriz, Soudabeh. “Analyses of passive and low energy cooling systems for retrofitting office buildings in Melbourne.” 2016. Masters Thesis, University of Melbourne. Accessed April 10, 2021.
http://hdl.handle.net/11343/92016.
MLA Handbook (7th Edition):
Neshastehriz, Soudabeh. “Analyses of passive and low energy cooling systems for retrofitting office buildings in Melbourne.” 2016. Web. 10 Apr 2021.
Vancouver:
Neshastehriz S. Analyses of passive and low energy cooling systems for retrofitting office buildings in Melbourne. [Internet] [Masters thesis]. University of Melbourne; 2016. [cited 2021 Apr 10].
Available from: http://hdl.handle.net/11343/92016.
Council of Science Editors:
Neshastehriz S. Analyses of passive and low energy cooling systems for retrofitting office buildings in Melbourne. [Masters Thesis]. University of Melbourne; 2016. Available from: http://hdl.handle.net/11343/92016
Georgia Tech
13.
Hesse, Danielle.
Passive thermal management of distribution grid assets.
Degree: MS, Mechanical Engineering, 2015, Georgia Tech
URL: http://hdl.handle.net/1853/54329
► This thesis presents a comprehensive study into the passive thermal management of high-voltage power electronics converters for use in augmented grid assets capable of performing…
(more)
▼ This thesis presents a comprehensive study into the passive thermal management of high-voltage power electronics converters for use in augmented grid assets capable of performing power routing on the electricity grid. The work has focused on the thermal transport of single-phase closed thermosiphon systems incorporating a secondary parallel flow path for
cooling an additional, typically smaller, thermal load associated with the power electronics converters. Dual-loop thermosiphon passive thermal management systems were incorporated into a grounded compact dynamic phase angle regulator (GCD-PAR) that aimed to facilitate power routing and reduce line losses on the power grid. The power router utilizes power electronics that reject heat to a planar area, or cold plate, which must be cooled by an entirely passive system to comply with the minimum 30 year mean time between failures (MTBF) consistent with grid reliability requirements. This design includes a secondary-loop
cooling path that utilizes the
cooling oil already present in the transformer to also cool the power router. An analytical multi-physics thermosiphon model is developed that couples existing fluid dynamic and heat transfer correlations to create a description of the steady state operation of a specific cylindrical 50 kVA transformer augmented with a thermosiphon. The model is validated experimentally and found to solve for steady state baseplate temperatures under maximum load within 2°C in 0.1 seconds. The model is then modified for a specific rectilinear 1 MVA transformer augmented with three thermosiphons. The 1 MVA model is validated experimentally and found to solve for steady state baseplate temperatures under maximum load within 4 °C in 0.2 seconds. The analytical model proves to be accurate and solve quickly with various geometric configurations and thermal loads.
Advisors/Committee Members: Mayor, Rhett J. (advisor), Ghiaasiaan, Mostafa S. (committee member), Jeter, Sheldon (committee member).
Subjects/Keywords: Thermosiphon; Passive cooling
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APA (6th Edition):
Hesse, D. (2015). Passive thermal management of distribution grid assets. (Masters Thesis). Georgia Tech. Retrieved from http://hdl.handle.net/1853/54329
Chicago Manual of Style (16th Edition):
Hesse, Danielle. “Passive thermal management of distribution grid assets.” 2015. Masters Thesis, Georgia Tech. Accessed April 10, 2021.
http://hdl.handle.net/1853/54329.
MLA Handbook (7th Edition):
Hesse, Danielle. “Passive thermal management of distribution grid assets.” 2015. Web. 10 Apr 2021.
Vancouver:
Hesse D. Passive thermal management of distribution grid assets. [Internet] [Masters thesis]. Georgia Tech; 2015. [cited 2021 Apr 10].
Available from: http://hdl.handle.net/1853/54329.
Council of Science Editors:
Hesse D. Passive thermal management of distribution grid assets. [Masters Thesis]. Georgia Tech; 2015. Available from: http://hdl.handle.net/1853/54329
California State University – Sacramento
14.
Verduzco, Manuel L.
Solar thermal energy feasibility in a commercial building in Sacramento.
Degree: MS, Mechanical Engineering, 2014, California State University – Sacramento
URL: http://hdl.handle.net/10211.3/122216
► In recent years, the demand for air conditioning systems due to the demand of higher comfort conditions has led to a significant increase for primary…
(more)
▼ In recent years, the demand for air conditioning systems due to the demand of higher comfort conditions has led to a significant increase for primary energy resources such as solar energy for
cooling. Solar
cooling (SC) is getting more and more readily available and cost effective. SC is environmentally friendly and decreases ???CO???
2 emissions thus reducing the greenhouse effect. Currently, one of the most frequently used solar
cooling systems is the water absorption chillers. Most traditional air conditioning systems use compression technology for their chillers. The absorption chillers used for SC usually combine with flat plate or an evacuated tube collectors. These types of SC are relatively young and are still being developed. In this paper, a two story building that has an area of 2796 square meters and a max
cooling load of about 211 kWh (60 RTh) is analyzed. Case Study 1 uses three of these buildings, Case Study 2 uses six buildings, and Case Study 3 uses 8 buildings. Given the different case studies, different chillers were chosen and the number of evacuated tube collectors and storage tanks are either increased or decreased given the number of buildings. The building???s design and
cooling loads were developed with conjunction with the ASHRAE Example Building for Chapter 30, Nonresidential
Cooling and Heating Load Calculations, of the 2005 ASHRAE Handbook-Fundamentals [1]. For the
cooling and heating load calculations the radiant time series (RTS) method was used. From the
cooling loads, the collector area and the volume of the storage tank were determined. In each of these three case studies, a cost analysis was made to compare the solar absorption system versus the tradition compression chiller. This analysis is made to see if this relatively new type of SC is even feasible in the Sacramento area.
Only in Case Study 1, the solar absorption system (796,663) is more economical than the vapor compression system (901,624) after 20 years. The cost of Case Study 2 is 1,703,456 for the solar absorption system and 1,681,408 for the vapor compression system after 20 years. Finally, for Case Study 3, which included 8 buildings, the solar absorption system cost is 2,240,643 and the cost for vapor compression system is 2,194,774 after 20 years.
Advisors/Committee Members: Marbach, Timothy.
Subjects/Keywords: Solar; Cooling; Absorption
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APA (6th Edition):
Verduzco, M. L. (2014). Solar thermal energy feasibility in a commercial building in Sacramento. (Masters Thesis). California State University – Sacramento. Retrieved from http://hdl.handle.net/10211.3/122216
Chicago Manual of Style (16th Edition):
Verduzco, Manuel L. “Solar thermal energy feasibility in a commercial building in Sacramento.” 2014. Masters Thesis, California State University – Sacramento. Accessed April 10, 2021.
http://hdl.handle.net/10211.3/122216.
MLA Handbook (7th Edition):
Verduzco, Manuel L. “Solar thermal energy feasibility in a commercial building in Sacramento.” 2014. Web. 10 Apr 2021.
Vancouver:
Verduzco ML. Solar thermal energy feasibility in a commercial building in Sacramento. [Internet] [Masters thesis]. California State University – Sacramento; 2014. [cited 2021 Apr 10].
Available from: http://hdl.handle.net/10211.3/122216.
Council of Science Editors:
Verduzco ML. Solar thermal energy feasibility in a commercial building in Sacramento. [Masters Thesis]. California State University – Sacramento; 2014. Available from: http://hdl.handle.net/10211.3/122216
University of Texas – Austin
15.
-3677-5743.
The effect of channel parameters on the adiabatic film cooling effectiveness of shaped holes in crossflow.
Degree: MSin Engineering, Mechanical engineering, 2015, University of Texas – Austin
URL: http://hdl.handle.net/2152/34143
► There is limited information in the literature on the behavior of shaped film cooling holes fed by crossflow and even less information on the effect…
(more)
▼ There is limited information in the literature on the behavior of shaped film
cooling holes fed by crossflow and even less information on the effect of crossflow parameters on film
cooling performance. Here, two scaled film
cooling models were used to independently vary the crossflow Reynolds numbers in the range of 36,000 to 57,000 and the crossflow velocity ratio from 0.36 to 0.64. Careful attention was paid to controlling physical parameters between comparisons to isolate the effects of internal velocity ratio or Reynolds number on the performance of shaped holes. In the process of controlling the physical parameters of the system, a novel correction for coolant to mainstream density ratio was proposed. The results of this study showed that channel velocity ratio had a larger effect on the film
cooling performance of shaped holes than channel Reynolds number. When the mass flux of fluid through the film
cooling holes was at the highest and lowest value, increasing the channel velocity ratio decreased the film
cooling effectiveness. At a middle mass flux, the outcome was opposite such that an increase in channel velocity ratio resulted in increased effectiveness.
Advisors/Committee Members: Bogard, David G. (advisor), Webber, Michael E. (committee member).
Subjects/Keywords: Film cooling; Turbomachinery
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APA (6th Edition):
-3677-5743. (2015). The effect of channel parameters on the adiabatic film cooling effectiveness of shaped holes in crossflow. (Masters Thesis). University of Texas – Austin. Retrieved from http://hdl.handle.net/2152/34143
Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete
Chicago Manual of Style (16th Edition):
-3677-5743. “The effect of channel parameters on the adiabatic film cooling effectiveness of shaped holes in crossflow.” 2015. Masters Thesis, University of Texas – Austin. Accessed April 10, 2021.
http://hdl.handle.net/2152/34143.
Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete
MLA Handbook (7th Edition):
-3677-5743. “The effect of channel parameters on the adiabatic film cooling effectiveness of shaped holes in crossflow.” 2015. Web. 10 Apr 2021.
Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete
Vancouver:
-3677-5743. The effect of channel parameters on the adiabatic film cooling effectiveness of shaped holes in crossflow. [Internet] [Masters thesis]. University of Texas – Austin; 2015. [cited 2021 Apr 10].
Available from: http://hdl.handle.net/2152/34143.
Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete
Council of Science Editors:
-3677-5743. The effect of channel parameters on the adiabatic film cooling effectiveness of shaped holes in crossflow. [Masters Thesis]. University of Texas – Austin; 2015. Available from: http://hdl.handle.net/2152/34143
Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete
Texas A&M University
16.
Haq, Syed Mohammad Hameed Ul.
Numerical Simulation of Uniform Circular Microjet and Mono Dispersed Micro Droplet Streams for Impingement Cooling.
Degree: MS, Mechanical Engineering, 2018, Texas A&M University
URL: http://hdl.handle.net/1969.1/174480
► Effective cooling of electronic chips is essential for optimum performance. With the exponential growth of computers, there has been a sharp rise in the heat…
(more)
▼ Effective
cooling of electronic chips is essential for optimum performance. With the exponential growth of computers, there has been a sharp rise in the heat generation of these devices. Therefore, an utmost need has developed to utilize alternative
cooling methods to ensure low operating temperatures. Some of the
cooling techniques under consideration include spray
cooling and jet impingement
cooling. While jet impingement
cooling is fairly easy to understand, Spray
cooling still remains one of the most parameter intensive physical mechanisms. A common practice to simplify spray
cooling is modeling it as a continuous stream of droplets, which is also followed in this study. A comparison between the two aforementioned techniques is necessary to understand which of them performs better for this particular application. For this purpose, a study based on computational fluid dynamics simulations was performed. Both
cooling technique were simulated with parameters in line with the experimental conditions.
To accurately depict the impingement process and fluid flow, a 2D axisymmetric structured grid was constructed. For accurate spatial resolution, grid was refined using static mesh adaption for jets and dynamic mesh adaption for droplets. A time dependent patching method was utilized to simulate a single stream of droplets. A Volume of Fluid approach coupled with the Level Set method (CLS-VOF) was employed in ANSYS Fluent for simulating the flow. A good agreement was reached between experimental and numerical data for both
cooling techniques, in terms of temperature profile, heat transfer coefficient, Nusselt number, impact crater diameter and film thickness in the impingement zone.
Heat transfer characteristics and hydrodynamics of jet impingement and droplet train impingement were compared and it was found that droplet train impingement outperformed the latter. Improved performance of droplet train impingement was due to the convective heat transfer across the surface, which was driven by fluid momentum. Droplet train impingement produced higher momentum across the impingement zone, compared to jet impingement, resulting in greater heat transfer. Higher momentum also led to larger crater diameters for droplet impingement. Despite its periodic behavior, a smooth temperature profile, with lower temperature gradients across the heat surface, was produced by droplet impingement as compared to jet impingement. This was attributed to the sweeping motion of the fluid at higher momentum, removing the generated heat, further away from the impingement zone. Thermal boundary layer of droplets was thinner than the thermal boundary layer of jets, indicating better heat transfer.
Advisors/Committee Members: Alvarado, Jorge (advisor), Pate, Michael (advisor), Donzis, Diego (committee member).
Subjects/Keywords: Impingement cooling; CFD
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APA (6th Edition):
Haq, S. M. H. U. (2018). Numerical Simulation of Uniform Circular Microjet and Mono Dispersed Micro Droplet Streams for Impingement Cooling. (Masters Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/174480
Chicago Manual of Style (16th Edition):
Haq, Syed Mohammad Hameed Ul. “Numerical Simulation of Uniform Circular Microjet and Mono Dispersed Micro Droplet Streams for Impingement Cooling.” 2018. Masters Thesis, Texas A&M University. Accessed April 10, 2021.
http://hdl.handle.net/1969.1/174480.
MLA Handbook (7th Edition):
Haq, Syed Mohammad Hameed Ul. “Numerical Simulation of Uniform Circular Microjet and Mono Dispersed Micro Droplet Streams for Impingement Cooling.” 2018. Web. 10 Apr 2021.
Vancouver:
Haq SMHU. Numerical Simulation of Uniform Circular Microjet and Mono Dispersed Micro Droplet Streams for Impingement Cooling. [Internet] [Masters thesis]. Texas A&M University; 2018. [cited 2021 Apr 10].
Available from: http://hdl.handle.net/1969.1/174480.
Council of Science Editors:
Haq SMHU. Numerical Simulation of Uniform Circular Microjet and Mono Dispersed Micro Droplet Streams for Impingement Cooling. [Masters Thesis]. Texas A&M University; 2018. Available from: http://hdl.handle.net/1969.1/174480
Anna University
17.
Arulselvan A.
Investigations on water heat pipe under various modes of
condenser cooling;.
Degree: Water heat pipe under various modes of condenser
cooling, 2013, Anna University
URL: http://shodhganga.inflibnet.ac.in/handle/10603/11308
► The heat pipe is a device, which does not require any external power to transport heat over a large distance, with minimal temperature difference. The…
(more)
▼ The heat pipe is a device, which does not require
any external power to transport heat over a large distance, with
minimal temperature difference. The simplicity of design, and ease
of manufacture and maintenance of heat pipes have made them
applicable in various fields of industry, such as energy conversion
systems, cooling of nuclear and isotope reactors, cooling of
electronic equipment, and high performance space applications. In
the present work, three heat pipes of the same dimensions of 1 m
length and 0.031m outer diameter were constructed with some
modifications in the condenser section, in order to provide three
different modes of cooling, viz, air cooling, water cooling and
cooling with extended surfaces in the condenser section.
Experiments are conducted to determine the surface and vapor
temperature distribution, at steady and transient conditions for
all the above said three modes of cooling in the condenser section.
A CFD analysis was also carried out, and the results under steady
state conditions are compared with the results obtained from the
experiments and reported. The performance of the heat pipe depends
on the type of cooling, and also the temperature at which the
cooling medium is available. In the cases of fin cooling and water
cooling in the condenser side, it is possible to maintain the
temperature of the vapor and the surface of the evaporator section
close to the saturation temperature, corresponding to the vapor
pressure maintained inside the heat pipe at the start of the
experiment. The effective thermal conductivity has been increased
approximately by 40 % to 45 %. Further, a material saving of 400 %
is achieved due to the hollow configuration made for the flow of
the heat transfer fluid. The CFD results are in reasonable
agreement with the results obtained from the experimental
investigation. The CFD analysis will be useful to extend the
analysis for other geometrical and dynamic parametric conditions.
newline
Appendices 1 and 2; pp. 81-83
Advisors/Committee Members: Velraj, R..
Subjects/Keywords: Water heat pipe; condenser cooling; air cooling; water
cooling; CFD analysis
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APA (6th Edition):
A, A. (2013). Investigations on water heat pipe under various modes of
condenser cooling;. (Thesis). Anna University. Retrieved from http://shodhganga.inflibnet.ac.in/handle/10603/11308
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
A, Arulselvan. “Investigations on water heat pipe under various modes of
condenser cooling;.” 2013. Thesis, Anna University. Accessed April 10, 2021.
http://shodhganga.inflibnet.ac.in/handle/10603/11308.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
A, Arulselvan. “Investigations on water heat pipe under various modes of
condenser cooling;.” 2013. Web. 10 Apr 2021.
Vancouver:
A A. Investigations on water heat pipe under various modes of
condenser cooling;. [Internet] [Thesis]. Anna University; 2013. [cited 2021 Apr 10].
Available from: http://shodhganga.inflibnet.ac.in/handle/10603/11308.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
A A. Investigations on water heat pipe under various modes of
condenser cooling;. [Thesis]. Anna University; 2013. Available from: http://shodhganga.inflibnet.ac.in/handle/10603/11308
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Stellenbosch University
18.
Graaff, Andre Hendri.
Performance evaluation of a hybrid (dry/wet) cooling system.
Degree: MEng, Mechanical and Mechatronic Engineering, 2017, Stellenbosch University
URL: http://hdl.handle.net/10019.1/101146
► ENGLISH ABSTRACT: The performance of a hybrid (dry/wet) cooling system (HDWCS) is investigated. The HDWCS aims to compete with dry cooling systems with added performance…
(more)
▼ ENGLISH ABSTRACT: The performance of a hybrid (dry/wet) cooling system (HDWCS) is investigated. The HDWCS aims to compete with dry cooling systems with added performance stability during hot ambient periods. The system consists of two stages – the first, finned tube bundles operating dry, and the second, a bare tube bundle operating dry or wet.
A numerical performance prediction model is developed to predict the performance of the HDWCS in terms of outlet process medium temperature, outlet air temperature and air-side pressure loss. For the finned tube bundles, the heat transfer coefficient correlation and pressure loss correlation proposed by Ganguli et al. (1985) are used to predict the air-side heat transfer coefficient and air-side pressure drop over the bundle. For the bare tube bundle under dry operation, the air-side heat transfer coefficient of Khan et al. (2006) and the air-side pressure drop correlation of Reuter and Anderson (2016) is used. For the bare tube bundle under wet operation, the mass and heat transfer coefficients proposed by Mizushina et al. (1967) are used together with the air-side pressure drop correlation from Reuter and Anderson (2016) to predict the thermal performance. Analysis of both the finned tube bundles and the bare tube bundle are based on a so-called integral method, where the outlet conditions were determined across the bundles from inlet conditions.
Experimental work investigates air flow rate, to avoid high air pressure drop across the bare tube bundle, and the minimum water flow rate to avoid dry-out inside the bare tube bundle are determined. A maximum air mass velocity of Gav = 3 kg/sm2 and a minimum water mass velocity of Гdw/do = 1.89 kg/sm2 is suggested. Thermocouple attachment methods are investigated for the bare tube bundle under wet operation. It is found that by attaching the thermocouples with 4 zip ties instead of 3, the certainty for measuring water temperature is significantly improved under the suggested air and water flow rates. The air-side pressure drop across the bare tube bundle is influenced by the number of tube rows present, together with air and water flow rates. The pressure drop under wet operation is slightly higher than under dry operation.
The bare tube bundle’s dimensions are determined from a parametric study, delivering a bare bundle, 800 mm in both width and height which can boost the cooling systems’ performance by between 35 % and 140 % relative to a conventional system, depending on air relative humidity at an ambient dry bulb temperature of 32 ºC. Inlet process medium temperature remains at 38 ºC. The HDWCS can serve as a strong competitor, delivering a significant increase in performance compared to dry coolers especially during hot periods, when the performance of dry only cooling systems are low.
AFRIKAANSE OPSOMMING: Die prestasievermoë van ʼn hibriede (droog/nat) verkoelingstelsel (HDNVS) word ondersoek. Dit word gedoen om sodoende ʼn verkoelingstelsel te ontwikkel, wat met droëverkoelingstelsels kan meeding en `n beter…
Advisors/Committee Members: Reuter, Hanno Carl Rudolf, Owen, Michael, Stellenbosch University. Faculty of Engineering. Dept. of Mechanical and Mechatronic Engineering..
Subjects/Keywords: Hybrid systems – Cooling; Multistage cooling; Heat transfer; Cooling systems; UCTD
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APA (6th Edition):
Graaff, A. H. (2017). Performance evaluation of a hybrid (dry/wet) cooling system. (Thesis). Stellenbosch University. Retrieved from http://hdl.handle.net/10019.1/101146
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Graaff, Andre Hendri. “Performance evaluation of a hybrid (dry/wet) cooling system.” 2017. Thesis, Stellenbosch University. Accessed April 10, 2021.
http://hdl.handle.net/10019.1/101146.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Graaff, Andre Hendri. “Performance evaluation of a hybrid (dry/wet) cooling system.” 2017. Web. 10 Apr 2021.
Vancouver:
Graaff AH. Performance evaluation of a hybrid (dry/wet) cooling system. [Internet] [Thesis]. Stellenbosch University; 2017. [cited 2021 Apr 10].
Available from: http://hdl.handle.net/10019.1/101146.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Graaff AH. Performance evaluation of a hybrid (dry/wet) cooling system. [Thesis]. Stellenbosch University; 2017. Available from: http://hdl.handle.net/10019.1/101146
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Delft University of Technology
19.
Georgiou, Rigas (author).
Daytime radiative cooling: A new passive cooling method for dwellings in the Mediterranean island of Cyprus.
Degree: 2019, Delft University of Technology
URL: http://resolver.tudelft.nl/uuid:8f6950a6-d945-4aee-94f8-08e74a6fbe2a
► Daytime radiative cooling (DRC) is a very novel passive cooling method for buildings that utilises the recent technological advance in wavelength selective-emittance material research and…
(more)
▼ Daytime radiative cooling (DRC) is a very novel passive cooling method for buildings that utilises the recent technological advance in wavelength selective-emittance material research and takes advantage of a transparency window that exists in the atmosphere between 8 and 13 μm. Application of DRC in locations where warm weather prevails for most of the year and cooling requirements of dwellings outweigh the respective heating ones could result in saving significant amounts of energy. Such a location is the small Mediterranean island of Cyprus. Designing an ideal radiative cooler is a challenging task and so it is to design an appropriate system that exploits the benefits of DRC. In such a design, a stratified thermal storage water tank can have a detrimental role. To identify whether it is possible to apply such a system in Cyprus, this project exploits the use of Matlab Simulink which has been used to run more than 6000 simulations, for a sensitivity and a varied analysis, taking into consideration different parameters with particular emphasis on the physical properties of the radiative cooling apparatus According to the data obtained, for the efficiency of a daytime radiative system to be maximized, the longwave transmission and emissivity coefficients of the cooler should be maximal while the shortwave transmission coefficient and the effective heat transfer coefficient to the environment should be minimal. Additionally, larger volumes of storage tanks achieve better results.
Civil Engineering | Building Engineering
Advisors/Committee Members: van der Spoel, Willem (mentor), Nijsse, Rob (graduation committee), Schipper, Roel (graduation committee), Delft University of Technology (degree granting institution).
Subjects/Keywords: Daytime radiative cooling; Radiative cooling; Cyprus; Matlab Simulink; Passive cooling
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APA (6th Edition):
Georgiou, R. (. (2019). Daytime radiative cooling: A new passive cooling method for dwellings in the Mediterranean island of Cyprus. (Masters Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:8f6950a6-d945-4aee-94f8-08e74a6fbe2a
Chicago Manual of Style (16th Edition):
Georgiou, Rigas (author). “Daytime radiative cooling: A new passive cooling method for dwellings in the Mediterranean island of Cyprus.” 2019. Masters Thesis, Delft University of Technology. Accessed April 10, 2021.
http://resolver.tudelft.nl/uuid:8f6950a6-d945-4aee-94f8-08e74a6fbe2a.
MLA Handbook (7th Edition):
Georgiou, Rigas (author). “Daytime radiative cooling: A new passive cooling method for dwellings in the Mediterranean island of Cyprus.” 2019. Web. 10 Apr 2021.
Vancouver:
Georgiou R(. Daytime radiative cooling: A new passive cooling method for dwellings in the Mediterranean island of Cyprus. [Internet] [Masters thesis]. Delft University of Technology; 2019. [cited 2021 Apr 10].
Available from: http://resolver.tudelft.nl/uuid:8f6950a6-d945-4aee-94f8-08e74a6fbe2a.
Council of Science Editors:
Georgiou R(. Daytime radiative cooling: A new passive cooling method for dwellings in the Mediterranean island of Cyprus. [Masters Thesis]. Delft University of Technology; 2019. Available from: http://resolver.tudelft.nl/uuid:8f6950a6-d945-4aee-94f8-08e74a6fbe2a
Louisiana State University
20.
Drewes, Christopher Michael.
The Design, Fabrication, and Validation of a Film Cooled Rotating Turbine Cascade with an Actively Cooled Shroud in a Closed Loop Wind Tunnel.
Degree: MSME, Mechanical Engineering, 2016, Louisiana State University
URL: etd-04072016-074848
;
https://digitalcommons.lsu.edu/gradschool_theses/2030
► To test shroud and blade cooling effectiveness, a closed loop, heated wind tunnel housing a film cooled rotating turbine cascade with prescribed blade and vane…
(more)
▼ To test shroud and blade cooling effectiveness, a closed loop, heated wind tunnel housing a film cooled rotating turbine cascade with prescribed blade and vane geometry surrounded by a fully cooled shroud with a leading edge gap were designed and assembled on Louisiana State University’s campus. Heat transfer coefficients and film cooling effectiveness results were computed using a 1-D semi-infinite solid conduction analysis of material temperatures obtained with liquid crystal thermography. Proper analysis required a step change in air temperature; so a bypass loop provided mainstream air heating while maintaining the shroud and blades at ambient temperature. Also, analysis required hollow tip film cooled turbine blades constructed of low thermal conductivity material, resulting in fabrication by 3-D plastic printing. An analytical stress model and finite element analysis validated plastic blade structural base design. Static-structural and dynamic fatigue loading analyses determined rotor shaft size. Heat transfer and pressure loss calculations verified the system’s required blade and shroud cooling characteristics. Finally, velocity vector measurements at the nozzle guide vane leading edge and recorded pressures in a nozzle guide vane passageway upstream of the turbine cascade location validated incoming freestream flow properties for the design condition at which heat transfer measurements were recorded. A total pressure loss analysis for varying rotor speed and blowing ratio was conducted with the development of total pressure contours downstream of the exit guide vanes to understand losses in the nozzle-rotor passage. Loss structures were found at the tip and root of the exit guide vane, attributed to the shed vortex and tip leakage vortex developed from the rotor blade. Total pressure loss decreased as blowing ratio increased due to energy added to the mainstream flow through the film cooling air. Rotor speed was varied from 55 to 655 RPM. Total pressure losses were lowest at 55 RPM, increased with increasing rotor speed past the 355 RPM design speed, and decreased as rotor speed approached 655 RPM. These results could be attributed to the introduction or extraction of shaft work in the rotating system along with aerodynamic losses associated with changes from the incidence angle design.
Subjects/Keywords: shroud cooling; tip cooling; heat transfer; gas turbine; film cooling
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APA (6th Edition):
Drewes, C. M. (2016). The Design, Fabrication, and Validation of a Film Cooled Rotating Turbine Cascade with an Actively Cooled Shroud in a Closed Loop Wind Tunnel. (Masters Thesis). Louisiana State University. Retrieved from etd-04072016-074848 ; https://digitalcommons.lsu.edu/gradschool_theses/2030
Chicago Manual of Style (16th Edition):
Drewes, Christopher Michael. “The Design, Fabrication, and Validation of a Film Cooled Rotating Turbine Cascade with an Actively Cooled Shroud in a Closed Loop Wind Tunnel.” 2016. Masters Thesis, Louisiana State University. Accessed April 10, 2021.
etd-04072016-074848 ; https://digitalcommons.lsu.edu/gradschool_theses/2030.
MLA Handbook (7th Edition):
Drewes, Christopher Michael. “The Design, Fabrication, and Validation of a Film Cooled Rotating Turbine Cascade with an Actively Cooled Shroud in a Closed Loop Wind Tunnel.” 2016. Web. 10 Apr 2021.
Vancouver:
Drewes CM. The Design, Fabrication, and Validation of a Film Cooled Rotating Turbine Cascade with an Actively Cooled Shroud in a Closed Loop Wind Tunnel. [Internet] [Masters thesis]. Louisiana State University; 2016. [cited 2021 Apr 10].
Available from: etd-04072016-074848 ; https://digitalcommons.lsu.edu/gradschool_theses/2030.
Council of Science Editors:
Drewes CM. The Design, Fabrication, and Validation of a Film Cooled Rotating Turbine Cascade with an Actively Cooled Shroud in a Closed Loop Wind Tunnel. [Masters Thesis]. Louisiana State University; 2016. Available from: etd-04072016-074848 ; https://digitalcommons.lsu.edu/gradschool_theses/2030
Texas A&M University
21.
Wang, Nian.
Turbine Blade Internal Heat Transfer and Film Cooling Studies.
Degree: PhD, Mechanical Engineering, 2018, Texas A&M University
URL: http://hdl.handle.net/1969.1/174501
► Gas turbine engines are widely used in many industrial applications including aircraft propulsion, land-based power generation, and marine oil & gas industries. Currently, the highest…
(more)
▼ Gas turbine engines are widely used in many industrial applications including aircraft propulsion, land-based power generation, and marine oil & gas industries. Currently, the highest turbine inlet temperature is around 1700°C. This turbine inlet temperature has already exceeded the yielding point of the blade material (1200°C). Therefore, advanced
cooling techniques are employed to protect the hot-gas-path components from being heated and also ensure the long-lasting operation of gas turbines. In this study, experiments on the leading edge jet impingement
cooling (first part), the flat plate film
cooling (second part) and the endwall film
cooling (third part) with more realistic features are proposed to improve the turbine airfoil
cooling design.
The first part studies the impinging jet position effects (normal jet and tangential jet) and camera viewing angle effects. The impingement heat transfer distribution on the target wall is expected to obtain by using the transient liquid crystal (TLC) technique. Jet Reynolds numbers, 10,000, 20,000 and 30,000, based on the jet hole diameter, will be tested respectively. Numerical simulations using RANS will be carried out to explore the flow physics inside the impingement cavity.
The second part is focused on the film
cooling effectiveness of two-row compound angled cylindrical holes by using the pressure sensitive paint (PSP) technique. The coolant-to-mainstream density ratio (DR) includes DR = 1.0 (low-temperature experiments), DR = 1.5 (intermediate DR) and DR = 2.0 (close to engine conditions) will be evaluated. Film
cooling effectiveness distribution on the flat plate and the area-averaged film
cooling effectiveness will be presented and compared for the optimization of the two-row compound cylindrical
cooling hole design.
The third part investigates the endwall film
cooling from two different
cooling hole patterns: mid-chord row and downstream row. The isentropic exit Mach number will be at 0.5 corresponding to inlet Reynolds number of 380,000, based on the axial chord length of the vane. The free-stream turbulence intensity will be kept at 19%. This study will discuss the effects of the upstream injection flow to the endwall film
cooling.
Advisors/Committee Members: Han, Je-Chin (advisor), Sy-Bor, Wen (committee member), Hassan, Yassin A. (committee member), Palazzolo, Alan (committee member).
Subjects/Keywords: Turbine jet impingement cooling; Flat plate film cooling; Endwall film cooling
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APA ·
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APA (6th Edition):
Wang, N. (2018). Turbine Blade Internal Heat Transfer and Film Cooling Studies. (Doctoral Dissertation). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/174501
Chicago Manual of Style (16th Edition):
Wang, Nian. “Turbine Blade Internal Heat Transfer and Film Cooling Studies.” 2018. Doctoral Dissertation, Texas A&M University. Accessed April 10, 2021.
http://hdl.handle.net/1969.1/174501.
MLA Handbook (7th Edition):
Wang, Nian. “Turbine Blade Internal Heat Transfer and Film Cooling Studies.” 2018. Web. 10 Apr 2021.
Vancouver:
Wang N. Turbine Blade Internal Heat Transfer and Film Cooling Studies. [Internet] [Doctoral dissertation]. Texas A&M University; 2018. [cited 2021 Apr 10].
Available from: http://hdl.handle.net/1969.1/174501.
Council of Science Editors:
Wang N. Turbine Blade Internal Heat Transfer and Film Cooling Studies. [Doctoral Dissertation]. Texas A&M University; 2018. Available from: http://hdl.handle.net/1969.1/174501
University of Waterloo
22.
Rodríguez-Briones, Nayeli Azucena.
Novel Heat-Bath Algorithmic Cooling methods.
Degree: 2020, University of Waterloo
URL: http://hdl.handle.net/10012/16147
► The field of quantum information has inspired new methods for cooling physical systems at the quantum scale by manipulating entropy in an algorithmic way, such…
(more)
▼ The field of quantum information has inspired new methods for cooling physical systems at the quantum scale by manipulating entropy in an algorithmic way, such as heat-bath algorithmic cooling (HBAC). These methods not only provide fundamental insight into quantum thermodynamics, but they are also at the core of practical applications in quantum science and quantum technologies. Arguably, the most promising practical applications are in quantum computing, for the preparation of pure states. The ability to prepare highly pure states is required both for initializing qubits in most quantum algorithms and for supplying reliable low-noise ancilla qubits that satisfy the fault-tolerance threshold for quantum error correction (achieving the high levels of purity required represents one of the major challenges not only for ensemble implementations but also for technologies with strong but not perfect projective measurements).
The heat bath algorithmic cooling protocols have inspired the work within this thesis, which examines and proposes powerful new techniques that significantly enhance cooling by taking advantage of classical and quantum correlations. These new methods go beyond the limits of conventional cooling techniques, providing a novel way to cool that allows a generalized interaction of the system with the environment, which has not been taken into account in previous work. Concretely, I have contributed to elucidating our understanding of these algorithmic cooling mechanisms by using techniques from quantum information theory and quantum thermodynamics. First, I found the analytical solution of the maximum achievable cooling of these algorithmic cooling methods, which had been a longstanding problem that remained open for almost 15 years. Then, I showed how to circumvent the cooling limits of the conventional algorithmic cooling – which were widely believed to be optimal –, creating novel methods that show how correlations can be used to significantly improve cooling. On the one hand, we fundamentally changed the way previous methods considered the interactions between the system and environment and showed how correlated relaxation processes can be essential for enhancing cooling. On the other hand, we demonstrated that correlations present in the initial state due to internal interactions can be exploited to improve cooling. Finally, we showed how, by using ideas and concepts from resource theory, it is possible to find the optimal entropy compression required for HBAC by studying the n-to-1 distillation of athermality of two level systems.
Subjects/Keywords: Algorithmic cooling; Quantum thermodynamics; Quantum information; Quantum state preparation; Resource theories; Cooling limits; Cooling bounds
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APA (6th Edition):
Rodríguez-Briones, N. A. (2020). Novel Heat-Bath Algorithmic Cooling methods. (Thesis). University of Waterloo. Retrieved from http://hdl.handle.net/10012/16147
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Rodríguez-Briones, Nayeli Azucena. “Novel Heat-Bath Algorithmic Cooling methods.” 2020. Thesis, University of Waterloo. Accessed April 10, 2021.
http://hdl.handle.net/10012/16147.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Rodríguez-Briones, Nayeli Azucena. “Novel Heat-Bath Algorithmic Cooling methods.” 2020. Web. 10 Apr 2021.
Vancouver:
Rodríguez-Briones NA. Novel Heat-Bath Algorithmic Cooling methods. [Internet] [Thesis]. University of Waterloo; 2020. [cited 2021 Apr 10].
Available from: http://hdl.handle.net/10012/16147.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Rodríguez-Briones NA. Novel Heat-Bath Algorithmic Cooling methods. [Thesis]. University of Waterloo; 2020. Available from: http://hdl.handle.net/10012/16147
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Brno University of Technology
23.
Brázdil, Marian.
Peltierův článek pro chlazení malých výkonů: Micro cooling with Peltier cell.
Degree: 2019, Brno University of Technology
URL: http://hdl.handle.net/11012/9794
► This work concerns detail description of thermoelectric cooling modules, principles and practical utilization of thermoelectric cooling modules. Experimental part of this work studies computer cooling.…
(more)
▼ This work concerns detail description of thermoelectric
cooling modules, principles and practical utilization of thermoelectric
cooling modules. Experimental part of this work studies computer
cooling. Distribution of temperature at the cold and hot side of the thermoelectric
cooling module as a function of load of a processor was measured. The obtained temperatures were compared with the common
cooling methods.
Advisors/Committee Members: Pospíšil, Jiří (advisor), Bogdálek, Jan (referee).
Subjects/Keywords: Termoelektrické chlazení; Peltierovy články; procesor; chlazení počítače; Thermoelectric Cooling; Thermoelectric Cooling Modules; Processor; Computer Cooling
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APA (6th Edition):
Brázdil, M. (2019). Peltierův článek pro chlazení malých výkonů: Micro cooling with Peltier cell. (Thesis). Brno University of Technology. Retrieved from http://hdl.handle.net/11012/9794
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Brázdil, Marian. “Peltierův článek pro chlazení malých výkonů: Micro cooling with Peltier cell.” 2019. Thesis, Brno University of Technology. Accessed April 10, 2021.
http://hdl.handle.net/11012/9794.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Brázdil, Marian. “Peltierův článek pro chlazení malých výkonů: Micro cooling with Peltier cell.” 2019. Web. 10 Apr 2021.
Vancouver:
Brázdil M. Peltierův článek pro chlazení malých výkonů: Micro cooling with Peltier cell. [Internet] [Thesis]. Brno University of Technology; 2019. [cited 2021 Apr 10].
Available from: http://hdl.handle.net/11012/9794.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Brázdil M. Peltierův článek pro chlazení malých výkonů: Micro cooling with Peltier cell. [Thesis]. Brno University of Technology; 2019. Available from: http://hdl.handle.net/11012/9794
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
24.
Underwood, Sean Christopher.
Aerothermodynamics of Impingement and Film Cooling in a Gas Turbine Blade.
Degree: PhD, Aerospace Engineering, 2018, University of Kansas
URL: http://hdl.handle.net/1808/27605
► The service life of gas turbine engine turbine blades depends on the blade’s material, service temperature and total stress. In high-performance gas turbines, film cooling…
(more)
▼ The service life of gas turbine engine turbine blades depends on the blade’s material, service temperature and total stress. In high-performance gas turbines, film
cooling is widely used to reduce the blade service temperature. Often impingement
cooling is also employed to target the stagnation point heat transfer for internally-cooled gas turbine blades. A novel thermal wind tunnel was designed to study the combined effect of the impingement and film
cooling on blunt airfoils. The hot exhaust plume of a micro-jet is used as the source of high-temperature gas flow in the thermal wind tunnel. An ejector nozzle was designed and integrated with the hot jet to provide a thermally controlled test section environment in the research facility. Measurements of freestream parameters such as gas speed, turbulence intensity and gas temperature were made. An airfoil that utilizes leading-edge (internal) impingement as well as film
cooling holes on its suction surface was designed and fabricated. A
cooling sleeve is used inside the airfoil to guide the impingement jets on the leading edge and to supply the coolant to the film holes. The surface temperature distribution is measured by an array of eight thermocouples flush-mounted on the airfoil surface downstream of the film holes. The initial ranges of blowing parameters (Mb) investigated were between 5 and 6. Numerical simulation using a commercially available Reynolds-Averaged Navier-Stokes (RANS) software was used and validated by the experimental measurements. The numerical simulations for the airfoil consisted of two thermal wall boundary conditions, the adiabatic and conjugate heat transfer (CHT) models. The adiabatic model focuses on the effect of film
cooling on an adiabatic wall. The conjugate heat transfer model represents the solid and fluid heat transfer exchange, conduction and convection. Verification and validation was completed to ensure accurate aerothermodynamic simulations. The experimental and numerical data showed a close comparison for the suction surface temperatures and
cooling effectiveness. A broader range of characteristic parameters (blowing parameter, turbulence intensity (Tu) and density ratio) were studied to show their impact on film
cooling effectiveness parameter. The effects from the blowing parameter are reported for different Mb of 0.53 to 5.95 with two turbulent intensities, 5% and 20%. The adiabatic film effectiveness parameter showed two unique trends: low Mb with low Tu or high Mb with high Tu both exhibited improved film
cooling effectiveness. Jet detachment is also detected at Mb ~ 1.5 for the current film
cooling set up. The study of turbulence intensity effects was completed in the range of 5% to 25 % for two density ratios of 1.65 and 1.99. The turbulence intensity study showed that higher Tu caused the adiabatic film effectiveness to decrease by an average 18%. The density ratio (DR) in the film
cooling is studied to explore the real turbine environment. The velocity ratio and turbulence intensity is held at a constant of 0.64 and…
Advisors/Committee Members: Taghavi, Ray (advisor), Farokhi, Saeed (advisor), Wu, Huixuan (cmtemember), Keshmiri, Shawn (cmtemember), Medina, Mario (cmtemember).
Subjects/Keywords: Aerospace engineering; Mechanical engineering; Aerothermodynamics; Film Cooling; Gas Turbine; Impingement Cooling; Propulsion; Turbine Blade Cooling
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APA (6th Edition):
Underwood, S. C. (2018). Aerothermodynamics of Impingement and Film Cooling in a Gas Turbine Blade. (Doctoral Dissertation). University of Kansas. Retrieved from http://hdl.handle.net/1808/27605
Chicago Manual of Style (16th Edition):
Underwood, Sean Christopher. “Aerothermodynamics of Impingement and Film Cooling in a Gas Turbine Blade.” 2018. Doctoral Dissertation, University of Kansas. Accessed April 10, 2021.
http://hdl.handle.net/1808/27605.
MLA Handbook (7th Edition):
Underwood, Sean Christopher. “Aerothermodynamics of Impingement and Film Cooling in a Gas Turbine Blade.” 2018. Web. 10 Apr 2021.
Vancouver:
Underwood SC. Aerothermodynamics of Impingement and Film Cooling in a Gas Turbine Blade. [Internet] [Doctoral dissertation]. University of Kansas; 2018. [cited 2021 Apr 10].
Available from: http://hdl.handle.net/1808/27605.
Council of Science Editors:
Underwood SC. Aerothermodynamics of Impingement and Film Cooling in a Gas Turbine Blade. [Doctoral Dissertation]. University of Kansas; 2018. Available from: http://hdl.handle.net/1808/27605
University of Maryland
25.
Yuruker, Sevket Umut.
THERMOELECTRIC COOLING OF HIGH FLUX ELECTRONICS.
Degree: Mechanical Engineering, 2017, University of Maryland
URL: http://hdl.handle.net/1903/20047
► On-chip thermoelectric cooling is a promising solution for thermal management of next generation integrated circuits. This thesis focuses on three thermoelectric cooling applications for high…
(more)
▼ On-chip thermoelectric
cooling is a promising solution for thermal management of next generation integrated circuits. This thesis focuses on three thermoelectric
cooling applications for high flux electronics. A micro contact enhanced thin film thermoelectric cooler was designed for remediation of a 5kW/cm2 hotspot and its integration with manifold microchannel system is numerically demonstrated. In addition, thermoelectric
cooling was utilized for thermal de-coupling of electronic chips with different operating temperatures, eliminating the need to over-cool the entire package. Furthermore, effect of decreasing contact resistances in thin film thermoelectrics was numerically investigated to effectively remove 100W (~280W/cm2) of heat dissipation from quantum cascade lasers. Finally, a system-level optimization methodology is established with comprehensive mathematical modeling, verified with numerical simulations. Master curves are generated to understand the effect of system-level parasitics on performance and optimal design variables. In conclusion, the advantages of thermoelectric
cooling for high flux electronics is demonstrated in this thesis.
Advisors/Committee Members: Yang, Bao (advisor), Bar-Cohen, Avram (advisor).
Subjects/Keywords: Mechanical engineering; High Flux Electronics; Hotspot Cooling; Micro-channel Cooling; Optimization; Thermal Management; Thermoelectric Cooling
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APA (6th Edition):
Yuruker, S. U. (2017). THERMOELECTRIC COOLING OF HIGH FLUX ELECTRONICS. (Thesis). University of Maryland. Retrieved from http://hdl.handle.net/1903/20047
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Yuruker, Sevket Umut. “THERMOELECTRIC COOLING OF HIGH FLUX ELECTRONICS.” 2017. Thesis, University of Maryland. Accessed April 10, 2021.
http://hdl.handle.net/1903/20047.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Yuruker, Sevket Umut. “THERMOELECTRIC COOLING OF HIGH FLUX ELECTRONICS.” 2017. Web. 10 Apr 2021.
Vancouver:
Yuruker SU. THERMOELECTRIC COOLING OF HIGH FLUX ELECTRONICS. [Internet] [Thesis]. University of Maryland; 2017. [cited 2021 Apr 10].
Available from: http://hdl.handle.net/1903/20047.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Yuruker SU. THERMOELECTRIC COOLING OF HIGH FLUX ELECTRONICS. [Thesis]. University of Maryland; 2017. Available from: http://hdl.handle.net/1903/20047
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of Maryland
26.
Popli, Sahil.
Performance enhancement of heat exchanger coolers with evaporative cooling.
Degree: Mechanical Engineering, 2014, University of Maryland
URL: http://hdl.handle.net/1903/15957
► Air or water cooled heat exchangers (HX) are typically utilized as condensers or coolers for air-conditioning, refrigeration or process cooling applications in both commercial and…
(more)
▼ Air or water cooled heat exchangers (HX) are typically utilized as condensers or coolers for air-conditioning, refrigeration or process
cooling applications in both commercial and industrial sector. However, air cooled heat exchanger performance degrades considerably with rise in ambient air temperature and water cooled coolers require considerable pumping power, a
cooling tower and may consume a significant amount of water which may come from fresh water sources. Evaporative
cooling offers a unique solution to this problem, where a small amount of wetting water evaporates on HX surface to boost performance in high ambient air temperature conditions.
In this study, several evaporative
cooling technologies were applied to three wavy-fin HXs to quantify capacity enhancement ratio (CER) and air-side pressure drop penalty ratio (PRΔPa) compared to respective dry case baseline values. Effect of varying wetting water flow rate, air velocity, fin spacing, hydrophilic coatings, spray orientation and inlet air temperature and relative humidity was investigated on hybrid heat exchanger performance. Several new performance comparison parameters were defined to compare different evaporative
cooling approaches.
Deluge
cooling achieved overall highest CER but at a PRΔPa that was similar in magnitude to the CER. This limitation was found to be inherent to the nature of wetting water distribution method itself. Although front spray
cooling tests indicated PRΔPa~1, front spray evaporative
cooling technology was found to have up to 23-75 % lower CER at 60-100% lower PRΔPa compared to deluge
cooling. In order to understand the wetting behavior a novel visualization method was proposed and implemented, which consisted of borescope assisted flow mapping of water distribution within the HX core as a function of air velocities and wetting water flow rates. It was found that up to 85% of HX volume remained dry during front spray
cooling which accounted for lower capacity enhancement and deluge
cooling forms non-uniform and thick water film which causes bridging and increased PRΔPa, A larger component level testing with HX size similar to commercial units allowed to identify constraints of different evaporative
cooling methods, which would not be possible if tests were performed at a smaller segment or fin level.
A novel spray
cooling technology utilizing internal jet spray
cooling within HX volume was both proposed and implemented and a provisional patent 61/782,825 was obtained. Compared to front spray
cooling at a given spray rate, internal spray
cooling could either achieve up to 35% higher HX cooler capacity, or obtain same HX cooler capacity at approximately three times lower air-side pressure drop. Alternatively, at same air-side pressure drop wetting water savings of up to 68-97% are achieved. Internal spraying combines advantages of conventional technologies and overcomes the drawbacks, by getting CER of approx. 3.8, without film carryover and at PRΔPa=1, while getting maximum wetting uniformity.…
Advisors/Committee Members: Radermacher, Reinhard (advisor).
Subjects/Keywords: Mechanical engineering; Energy; Theoretical mathematics; deluge cooling; evaporative cooling; spray cooling; wavy fin heat exchanger
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Manager
APA (6th Edition):
Popli, S. (2014). Performance enhancement of heat exchanger coolers with evaporative cooling. (Thesis). University of Maryland. Retrieved from http://hdl.handle.net/1903/15957
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Popli, Sahil. “Performance enhancement of heat exchanger coolers with evaporative cooling.” 2014. Thesis, University of Maryland. Accessed April 10, 2021.
http://hdl.handle.net/1903/15957.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Popli, Sahil. “Performance enhancement of heat exchanger coolers with evaporative cooling.” 2014. Web. 10 Apr 2021.
Vancouver:
Popli S. Performance enhancement of heat exchanger coolers with evaporative cooling. [Internet] [Thesis]. University of Maryland; 2014. [cited 2021 Apr 10].
Available from: http://hdl.handle.net/1903/15957.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Popli S. Performance enhancement of heat exchanger coolers with evaporative cooling. [Thesis]. University of Maryland; 2014. Available from: http://hdl.handle.net/1903/15957
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Virginia Tech
27.
Lamont, Justin Andrew.
Heat Transfer in Stationary and Rotating Coolant Channels Using a Transient Liquid Crystal Technique.
Degree: PhD, Mechanical Engineering, 2012, Virginia Tech
URL: http://hdl.handle.net/10919/19192
► Heat transfer inside rotating coolant channels have a significant impact in design of gas turbine airfoils and other rotating components such as generator windings. The…
(more)
▼ Heat transfer inside rotating coolant channels have a significant impact in design of gas turbine airfoils and other rotating components such as generator windings. The effects of the Coriolis acceleration and centrifugal buoyancy have a significant impact on heat transfer behavior inside such rotating coolant channels due to the complex flow patterns of coolant. Detailed heat transfer knowledge greatly enhances the designersábility to validate numerical models of newly designed channels. A rotating experimental rig was designed and built to model scaled up coolant channels at speeds up to 750 rotations per minute (rpm). A camera is mounted onto the rotating test section and a transient liquid crystal technique is used to measure detailed heat transfer coefficients on a surface of interest. The experimental set-up is innovative, as it involves no surface heating of the test section, very little instrumentation beyond a few thermocouples and a spray coating of thermochromic liquid crystals on the test surface. To validate the test rig and the experimental method, multipass coolant channels with rib turbulators, large diameter radially outward channels with rib turbulators, and jet impingement
cooling schemes are studied during rotation. 90deg, W, and M-shaped rib enhancements are studied and detailed heat transfer measurements clearly capture the heat transfer enhancement mechanisms with and without rotation. Jet impingement schemes with single and double rows, normal and off-angle jets, and a cross flow outlet condition are all studied under rotation. Non-rotating studies are also performed for baseline comparisons to rotating conditions. Large aspect ratio, diverging channels with dimple and rib turbulators are studied in a stationary condition. Results for all different test geometries show good comparisons with published studies indicating that the rotating rig and experimental method are valid. Jet impingement schemes produce higher heat transfer compared to the two-pass channels with ribs, however pressure losses are significantly higher. The fewer the jets and H/d=1 produces the highest pressure losses with no significant gain in heat transfer. Off angle jets at H/d=1 produces very high pressure losses with no heat transfer advantage. A final study with radially outward coolant channels is performed with the highest rotation speeds. The structure, test section, and camera are thoroughly designed to withstand the exceptional g-forces. Heat transfer in the radial channels with and without rotation show very little effect of rotation due to the small rotation number.
Advisors/Committee Members: Ekkad, Srinath V. (committeechair), Tafti, Danesh K. (committee member), Roy, Christopher John (committee member), Ng, Wing Fai (committee member), Stern, Curtis H. (committee member).
Subjects/Keywords: Heat Transfer; Gas Turbine Cooling; Stator Winding Cooling; Rotor Winding Cooling; Liquid Crystal Thermography
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APA ·
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to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Lamont, J. A. (2012). Heat Transfer in Stationary and Rotating Coolant Channels Using a Transient Liquid Crystal Technique. (Doctoral Dissertation). Virginia Tech. Retrieved from http://hdl.handle.net/10919/19192
Chicago Manual of Style (16th Edition):
Lamont, Justin Andrew. “Heat Transfer in Stationary and Rotating Coolant Channels Using a Transient Liquid Crystal Technique.” 2012. Doctoral Dissertation, Virginia Tech. Accessed April 10, 2021.
http://hdl.handle.net/10919/19192.
MLA Handbook (7th Edition):
Lamont, Justin Andrew. “Heat Transfer in Stationary and Rotating Coolant Channels Using a Transient Liquid Crystal Technique.” 2012. Web. 10 Apr 2021.
Vancouver:
Lamont JA. Heat Transfer in Stationary and Rotating Coolant Channels Using a Transient Liquid Crystal Technique. [Internet] [Doctoral dissertation]. Virginia Tech; 2012. [cited 2021 Apr 10].
Available from: http://hdl.handle.net/10919/19192.
Council of Science Editors:
Lamont JA. Heat Transfer in Stationary and Rotating Coolant Channels Using a Transient Liquid Crystal Technique. [Doctoral Dissertation]. Virginia Tech; 2012. Available from: http://hdl.handle.net/10919/19192
Oregon State University
28.
Nelson, Roy K.
Pressure losses across a 180 degree turn in the AP1000 cooling annulus.
Degree: MS, Nuclear Engineering, 2008, Oregon State University
URL: http://hdl.handle.net/1957/9974
► A one-sixth scaled facility was constructed at Oregon State University to determine the pressure losses around Westinghouse's AP1000 Passive Containment Cooling System. An explanation of…
(more)
▼ A one-sixth scaled facility was constructed at Oregon State University to determine
the pressure losses around Westinghouse's AP1000 Passive Containment
Cooling System. An explanation of the AP1000 Passive Containment
Cooling System
is given. This study examined the pressure loss and loss coefficient around the
180 degree turn of the Passive Containment
Cooling System. Computational Fluid
Dynamics Models were developed for multiple turning vane designs. Comparisons
were made between the FLUENT models and the experimental facility.
A turning vane reduced the pressure loss by at least a factor of four compared
to a straight geometry. The pressure loss around the 180 degree turn was insignificant
compared to the pressure loss encountered in other locations in the Passive
Containment
Cooling System. The Computational Fluid Dynamics code accurately
predicted the
ow behavior around the 180 degree turn. All of the
ow tests were
performed under turbulent conditions.
Advisors/Committee Members: Reyes, Jose N. Jr. (advisor), Wu, Qiao (committee member).
Subjects/Keywords: AP1000; Pressurized water reactors – Cooling
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APA (6th Edition):
Nelson, R. K. (2008). Pressure losses across a 180 degree turn in the AP1000 cooling annulus. (Masters Thesis). Oregon State University. Retrieved from http://hdl.handle.net/1957/9974
Chicago Manual of Style (16th Edition):
Nelson, Roy K. “Pressure losses across a 180 degree turn in the AP1000 cooling annulus.” 2008. Masters Thesis, Oregon State University. Accessed April 10, 2021.
http://hdl.handle.net/1957/9974.
MLA Handbook (7th Edition):
Nelson, Roy K. “Pressure losses across a 180 degree turn in the AP1000 cooling annulus.” 2008. Web. 10 Apr 2021.
Vancouver:
Nelson RK. Pressure losses across a 180 degree turn in the AP1000 cooling annulus. [Internet] [Masters thesis]. Oregon State University; 2008. [cited 2021 Apr 10].
Available from: http://hdl.handle.net/1957/9974.
Council of Science Editors:
Nelson RK. Pressure losses across a 180 degree turn in the AP1000 cooling annulus. [Masters Thesis]. Oregon State University; 2008. Available from: http://hdl.handle.net/1957/9974
University of Windsor
29.
Arianmehr, Iman.
Turbulence convective heat transfer for cooling the
photovoltaic cells.
Degree: MA, Mechanical, Automotive, and Materials
Engineering, 2014, University of Windsor
URL: http://scholar.uwindsor.ca/etd/5149
► Solar PV (photovoltaic) is a rapidly advancing renewable energy technology which converts sunlight directly into electricity. One of the outstanding challenges of the current…
(more)
▼ Solar PV (photovoltaic) is a rapidly
advancing renewable energy technology which converts sunlight
directly into electricity. One of the outstanding challenges of the
current PV technology is the reduction in its conversion efficiency
with increasing PV panel temperature, which is closely associated
with the increase in solar intensity and the ambient temperature
surrounding the PV panels. To more effectively capture the
available energy when the sun is most intense, significant efforts
have been invested in active and passive
cooling research over the
last few years. While integrated
cooling systems can lead to the
highest total efficiencies, they are usually neither the most
feasible nor the most cost effective solutions. This work examines
some simple passive means of manipulating the prevailing wind
turbulence to enhance convective heat transfer over a heated plate
in a wind tunnel.
Advisors/Committee Members: Ting, David S-K..
Subjects/Keywords: Applied sciences; Cooling; Photovoltaic; Turbulence
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APA (6th Edition):
Arianmehr, I. (2014). Turbulence convective heat transfer for cooling the
photovoltaic cells. (Masters Thesis). University of Windsor. Retrieved from http://scholar.uwindsor.ca/etd/5149
Chicago Manual of Style (16th Edition):
Arianmehr, Iman. “Turbulence convective heat transfer for cooling the
photovoltaic cells.” 2014. Masters Thesis, University of Windsor. Accessed April 10, 2021.
http://scholar.uwindsor.ca/etd/5149.
MLA Handbook (7th Edition):
Arianmehr, Iman. “Turbulence convective heat transfer for cooling the
photovoltaic cells.” 2014. Web. 10 Apr 2021.
Vancouver:
Arianmehr I. Turbulence convective heat transfer for cooling the
photovoltaic cells. [Internet] [Masters thesis]. University of Windsor; 2014. [cited 2021 Apr 10].
Available from: http://scholar.uwindsor.ca/etd/5149.
Council of Science Editors:
Arianmehr I. Turbulence convective heat transfer for cooling the
photovoltaic cells. [Masters Thesis]. University of Windsor; 2014. Available from: http://scholar.uwindsor.ca/etd/5149
Oregon State University
30.
Herbig, Scott M.
Solubilities of various salts in cooling tower water and a correlation to determine their scaling threshold.
Degree: MS, Chemical Engineering, 1985, Oregon State University
URL: http://hdl.handle.net/1957/41138
Subjects/Keywords: Cooling towers
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APA (6th Edition):
Herbig, S. M. (1985). Solubilities of various salts in cooling tower water and a correlation to determine their scaling threshold. (Masters Thesis). Oregon State University. Retrieved from http://hdl.handle.net/1957/41138
Chicago Manual of Style (16th Edition):
Herbig, Scott M. “Solubilities of various salts in cooling tower water and a correlation to determine their scaling threshold.” 1985. Masters Thesis, Oregon State University. Accessed April 10, 2021.
http://hdl.handle.net/1957/41138.
MLA Handbook (7th Edition):
Herbig, Scott M. “Solubilities of various salts in cooling tower water and a correlation to determine their scaling threshold.” 1985. Web. 10 Apr 2021.
Vancouver:
Herbig SM. Solubilities of various salts in cooling tower water and a correlation to determine their scaling threshold. [Internet] [Masters thesis]. Oregon State University; 1985. [cited 2021 Apr 10].
Available from: http://hdl.handle.net/1957/41138.
Council of Science Editors:
Herbig SM. Solubilities of various salts in cooling tower water and a correlation to determine their scaling threshold. [Masters Thesis]. Oregon State University; 1985. Available from: http://hdl.handle.net/1957/41138
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Open Access Theses and Dissertations
