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You searched for +publisher:"Temple University" +contributor:("Qiu, songgang;"). Showing records 1 – 3 of 3 total matches.

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Temple University

1. Mahdavi, Mahboobe. NUMERICAL AND EXPERIMENTAL ANALYSIS OF HEAT PIPES WITH APPLICATION IN CONCENTRATED SOLAR POWER SYSTEMS.

Degree: PhD, 2016, Temple University

Mechanical Engineering

Thermal energy storage systems as an integral part of concentrated solar power plants improve the performance of the system by mitigating the mismatch between the energy supply and the energy demand. Using a phase change material (PCM) to store energy increases the energy density, hence, reduces the size and cost of the system. However, the performance is limited by the low thermal conductivity of the PCM, which decreases the heat transfer rate between the heat source and PCM, which therefore prolongs the melting, or solidification process, and results in overheating the interface wall. To address this issue, heat pipes are embedded in the PCM to enhance the heat transfer from the receiver to the PCM, and from the PCM to the heat sink during charging and discharging processes, respectively. In the current study, the thermal-fluid phenomenon inside a heat pipe was investigated. The heat pipe network is specifically configured to be implemented in a thermal energy storage unit for a concentrated solar power system. The configuration allows for simultaneous power generation and energy storage for later use. The network is composed of a main heat pipe and an array of secondary heat pipes. The primary heat pipe has a disk-shaped evaporator and a disk-shaped condenser, which are connected via an adiabatic section. The secondary heat pipes are attached to the condenser of the primary heat pipe and they are surrounded by PCM. The other side of the condenser is connected to a heat engine and serves as its heat acceptor. The applied thermal energy to the disk-shaped evaporator changes the phase of working fluid in the wick structure from liquid to vapor. The vapor pressure drives it through the adiabatic section to the condenser where the vapor condenses and releases its heat to a heat engine. It should be noted that the condensed working fluid is returned to the evaporator by the capillary forces of the wick. The extra heat is then delivered to the phase change material through the secondary heat pipes. During the discharging process, secondary heat pipes serve as evaporators and transfer the stored energy to the heat engine. Due to the different geometry of the heat pipe network, a new numerical procedure was developed. The model is axisymmetric and accounts for the compressible vapor flow in the vapor chamber as well as heat conduction in the wall and wick regions. Because of the large expansion ratio from the adiabatic section to the primary condenser, the vapor flow leaving the adiabatic pipe section of the primary heat pipe to the disk-shaped condenser behaves similarly to a confined jet impingement. Therefore, the condensation is not uniform over the main condenser. The feature that makes the numerical procedure distinguished from other available techniques is its ability to simulate non-uniform condensation of the working fluid in the condenser section. The vapor jet impingement on the condenser surface along with condensation is modeled by attaching a porous layer adjacent to the condenser…

Advisors/Committee Members: Qiu, songgang;, Ren, Fei, Vainchtein, Dmitri, Tehrani, Rouzbeh;.

Subjects/Keywords: Mechanical engineering; Energy;

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APA (6th Edition):

Mahdavi, M. (2016). NUMERICAL AND EXPERIMENTAL ANALYSIS OF HEAT PIPES WITH APPLICATION IN CONCENTRATED SOLAR POWER SYSTEMS. (Doctoral Dissertation). Temple University. Retrieved from http://digital.library.temple.edu/u?/p245801coll10,400193

Chicago Manual of Style (16th Edition):

Mahdavi, Mahboobe. “NUMERICAL AND EXPERIMENTAL ANALYSIS OF HEAT PIPES WITH APPLICATION IN CONCENTRATED SOLAR POWER SYSTEMS.” 2016. Doctoral Dissertation, Temple University. Accessed November 24, 2020. http://digital.library.temple.edu/u?/p245801coll10,400193.

MLA Handbook (7th Edition):

Mahdavi, Mahboobe. “NUMERICAL AND EXPERIMENTAL ANALYSIS OF HEAT PIPES WITH APPLICATION IN CONCENTRATED SOLAR POWER SYSTEMS.” 2016. Web. 24 Nov 2020.

Vancouver:

Mahdavi M. NUMERICAL AND EXPERIMENTAL ANALYSIS OF HEAT PIPES WITH APPLICATION IN CONCENTRATED SOLAR POWER SYSTEMS. [Internet] [Doctoral dissertation]. Temple University; 2016. [cited 2020 Nov 24]. Available from: http://digital.library.temple.edu/u?/p245801coll10,400193.

Council of Science Editors:

Mahdavi M. NUMERICAL AND EXPERIMENTAL ANALYSIS OF HEAT PIPES WITH APPLICATION IN CONCENTRATED SOLAR POWER SYSTEMS. [Doctoral Dissertation]. Temple University; 2016. Available from: http://digital.library.temple.edu/u?/p245801coll10,400193


Temple University

2. Tiari, Saeed. EXPERIMENTAL AND NUMERICAL STUDY OF LATENT HEAT THERMAL ENERGY STORAGE SYSTEMS ASSISTED BY HEAT PIPES FOR CONCENTRATED SOLAR POWER APPLICATION.

Degree: PhD, 2016, Temple University

Mechanical Engineering

A desirable feature of concentrated solar power (CSP) with integrated thermal energy storage (TES) unit is to provide electricity in a dispatchable manner during cloud transient and non-daylight hours. Latent heat thermal energy storage (LHTES) offers many advantages such as higher energy storage density, wider range of operating temperature and nearly isothermal heat transfer relative to sensible heat thermal energy storage (SHTES), which is the current standard for trough and tower CSP systems. Despite the advantages mentioned above, LHTES systems performance is often limited by low thermal conductivity of commonly used, low cost phase change materials (PCMs). Research and development of passive heat transfer devices, such as heat pipes (HPs) to enhance the heat transfer in the PCM has received considerable attention. Due to its high effective thermal conductivity, heat pipe can transport large amounts of heat with relatively small temperature difference. The objective of this research is to study the charging and discharging processes of heat pipe-assisted LHTES systems using computational fluid dynamics (CFD) and experimental testing to develop a method for more efficient energy storage system design. The results revealed that the heat pipe network configurations and the quantities of heat pipes integrated in a thermal energy storage system have a profound effect on the thermal response of the system. The optimal placement of heat pipes in the system can significantly enhance the thermal performance. It was also found that the inclusion of natural convection heat transfer in the CFD simulation of the system is necessary to have a realistic prediction of a latent heat thermal storage system performance. In addition, the effects of geometrical features and quantity of fins attached to the HPs have been studied.

Temple University – Theses

Advisors/Committee Members: Qiu, Songgang;, Neretina, Svetlana, Ren, Fei, Tehrani, Rouzbeh;.

Subjects/Keywords: Mechanical engineering; Energy;

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Tiari, S. (2016). EXPERIMENTAL AND NUMERICAL STUDY OF LATENT HEAT THERMAL ENERGY STORAGE SYSTEMS ASSISTED BY HEAT PIPES FOR CONCENTRATED SOLAR POWER APPLICATION. (Doctoral Dissertation). Temple University. Retrieved from http://digital.library.temple.edu/u?/p245801coll10,403481

Chicago Manual of Style (16th Edition):

Tiari, Saeed. “EXPERIMENTAL AND NUMERICAL STUDY OF LATENT HEAT THERMAL ENERGY STORAGE SYSTEMS ASSISTED BY HEAT PIPES FOR CONCENTRATED SOLAR POWER APPLICATION.” 2016. Doctoral Dissertation, Temple University. Accessed November 24, 2020. http://digital.library.temple.edu/u?/p245801coll10,403481.

MLA Handbook (7th Edition):

Tiari, Saeed. “EXPERIMENTAL AND NUMERICAL STUDY OF LATENT HEAT THERMAL ENERGY STORAGE SYSTEMS ASSISTED BY HEAT PIPES FOR CONCENTRATED SOLAR POWER APPLICATION.” 2016. Web. 24 Nov 2020.

Vancouver:

Tiari S. EXPERIMENTAL AND NUMERICAL STUDY OF LATENT HEAT THERMAL ENERGY STORAGE SYSTEMS ASSISTED BY HEAT PIPES FOR CONCENTRATED SOLAR POWER APPLICATION. [Internet] [Doctoral dissertation]. Temple University; 2016. [cited 2020 Nov 24]. Available from: http://digital.library.temple.edu/u?/p245801coll10,403481.

Council of Science Editors:

Tiari S. EXPERIMENTAL AND NUMERICAL STUDY OF LATENT HEAT THERMAL ENERGY STORAGE SYSTEMS ASSISTED BY HEAT PIPES FOR CONCENTRATED SOLAR POWER APPLICATION. [Doctoral Dissertation]. Temple University; 2016. Available from: http://digital.library.temple.edu/u?/p245801coll10,403481


Temple University

3. Farzinpour, Pouyan. DYNAMIC TEMPLATING: A NEW PATHWAY FOR THE ASSEMBLY OF LARGE-AREA ARRAYS OF PLASMONIC, MAGNETIC AND SEMICONDUCTOR NANOMATERIALS.

Degree: PhD, 2014, Temple University

Mechanical Engineering

Substrate-based nanostructures are of great importance due to their applications in microelectronic devices, chemical sensors, catalysis and photovoltaics. This dissertation describes a novel fabrication technique for the formation of periodic arrays of substrate-based nanoparticles. The prescribed route, referred to as dynamic templating, requires modest levels of instrumentation consisting of a sputter coater, micrometer-scale shadow masks and a tube furnace. The route has broad applicability, having already produced periodic arrays of gold, silver, copper, platinum, nickel, cobalt, germanium and Au-Ag alloys on substrates as diverse as silicon, sapphire, silicon-carbide, and glass. The newly devised method offers large-area, high-throughput capabilities for the fabrication of periodic arrays of sub-micrometer and nanometer-scale structures and overcomes a significant technological barrier to the widespread use of substrate-based templated assembly by eliminating the need for periodic templates having nanoscale features. Because this technique only requires modest levels of instrumentation, researchers are now able to fabricate periodic arrays of nanostructures that would otherwise require advanced fabrication facilities.

Temple University – Theses

Advisors/Committee Members: Neretina, Svetlana, Hughes, Robert, Qiu, Songgang, Hutapea, Parsaoran, Van Aken, Benoit.

Subjects/Keywords: Mechanical engineering; Materials Science; nano; plasmonics; sensor; silicon

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Farzinpour, P. (2014). DYNAMIC TEMPLATING: A NEW PATHWAY FOR THE ASSEMBLY OF LARGE-AREA ARRAYS OF PLASMONIC, MAGNETIC AND SEMICONDUCTOR NANOMATERIALS. (Doctoral Dissertation). Temple University. Retrieved from http://digital.library.temple.edu/u?/p245801coll10,280637

Chicago Manual of Style (16th Edition):

Farzinpour, Pouyan. “DYNAMIC TEMPLATING: A NEW PATHWAY FOR THE ASSEMBLY OF LARGE-AREA ARRAYS OF PLASMONIC, MAGNETIC AND SEMICONDUCTOR NANOMATERIALS.” 2014. Doctoral Dissertation, Temple University. Accessed November 24, 2020. http://digital.library.temple.edu/u?/p245801coll10,280637.

MLA Handbook (7th Edition):

Farzinpour, Pouyan. “DYNAMIC TEMPLATING: A NEW PATHWAY FOR THE ASSEMBLY OF LARGE-AREA ARRAYS OF PLASMONIC, MAGNETIC AND SEMICONDUCTOR NANOMATERIALS.” 2014. Web. 24 Nov 2020.

Vancouver:

Farzinpour P. DYNAMIC TEMPLATING: A NEW PATHWAY FOR THE ASSEMBLY OF LARGE-AREA ARRAYS OF PLASMONIC, MAGNETIC AND SEMICONDUCTOR NANOMATERIALS. [Internet] [Doctoral dissertation]. Temple University; 2014. [cited 2020 Nov 24]. Available from: http://digital.library.temple.edu/u?/p245801coll10,280637.

Council of Science Editors:

Farzinpour P. DYNAMIC TEMPLATING: A NEW PATHWAY FOR THE ASSEMBLY OF LARGE-AREA ARRAYS OF PLASMONIC, MAGNETIC AND SEMICONDUCTOR NANOMATERIALS. [Doctoral Dissertation]. Temple University; 2014. Available from: http://digital.library.temple.edu/u?/p245801coll10,280637

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