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University of Saskatchewan
1.
Nieuwenhof, Philippe.
Modeling of the energy requirements of a non-row sensitive corn header for a pull-type forage harvester.
Degree: 2003, University of Saskatchewan
URL: http://hdl.handle.net/10388/etd-12192003-142629 
► With the constant diversification of cropping systems and the constant increase in farm size, new trends are observed for agricultural machinery. The increase in size…
(more)
▼ With the constant diversification of cropping systems and the constant increase in farm
size, new trends are observed for agricultural machinery. The increase in size of the
machinery and the increasing number of contractors has opened the market to selfpropelled
forage harvesters equipped with headers that can harvest row crops in any
direction, at any spacing. High-capacity pull-type forage harvesters are also in demand
but no commercial model offers non-row sensitive corn headers. The objectives of this
research were to collect data and develop models of specific energy requirements for a
prototype non-row sensitive corn header. The ability to better understand the processes
involved during the harvesting and the modeling of these allowed the formulation of
recommendations to reduce the loads on the harvester and propelling tractor.
Three sets of experiments were performed. The first experiment consisted of measuring
specific energy requirements of a non-row sensitive header, in field conditions, and to
compare them with a conventional header. The prototype tested was found to require
approximately twice the power than a conventional header of the same width, mostly
due to high no-load power. Some properties of corn stalk required for the modeling of
the energy needs, that were not available in literature, were measured in the laboratory.
Those include the cutting energy with a specific knife configuration used on the
prototype header and the crushing resistance of corn stalk. Two knife designs were
compared for required cutting energy and found not to be significantly different with
values of 0.054 J/mm2 of stalk cross-section area and 0.063 J/mm2. An average
crushing resistance of 6.5 N per percent of relative deformation was measured.
Three mathematical models were developed and validated with experimental data to
predict and understand the specific energy needs of the non-row sensitive header. An
analytical model was developed based on the analysis of the processes involved in the
harvesting. A regression model was developed based on throughput and header speed
and a general model suggested in literature was also validated with the data. All three
models were fitted with coefficient of correlation between 0.88 to 0.90.
Advisors/Committee Members: Roberge, Martin, Laguë, Claude, Hertz, P. Barry, Crowe, Trever G..
Subjects/Keywords: power requirements; specific energy; analytical model; machinery; silage; modeling
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APA (6th Edition):
Nieuwenhof, P. (2003). Modeling of the energy requirements of a non-row sensitive corn header for a pull-type forage harvester. (Thesis). University of Saskatchewan. Retrieved from http://hdl.handle.net/10388/etd-12192003-142629
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):
Nieuwenhof, Philippe. “Modeling of the energy requirements of a non-row sensitive corn header for a pull-type forage harvester.” 2003. Thesis, University of Saskatchewan. Accessed March 05, 2021.
http://hdl.handle.net/10388/etd-12192003-142629.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Nieuwenhof, Philippe. “Modeling of the energy requirements of a non-row sensitive corn header for a pull-type forage harvester.” 2003. Web. 05 Mar 2021.
Vancouver:
Nieuwenhof P. Modeling of the energy requirements of a non-row sensitive corn header for a pull-type forage harvester. [Internet] [Thesis]. University of Saskatchewan; 2003. [cited 2021 Mar 05].
Available from: http://hdl.handle.net/10388/etd-12192003-142629.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Nieuwenhof P. Modeling of the energy requirements of a non-row sensitive corn header for a pull-type forage harvester. [Thesis]. University of Saskatchewan; 2003. Available from: http://hdl.handle.net/10388/etd-12192003-142629
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of Saskatchewan
2.
Campbell, Douglas William.
Investigation of spring valves.
Degree: 1974, University of Saskatchewan
URL: http://hdl.handle.net/10388/etd-07152010-103652
► This thesis presents a study of spring valves with the ultimate aim of using them as high pressure hydraulic flow-control valves for agricultural applications. A…
(more)
▼ This thesis presents a study of spring valves with the ultimate aim of using them as high pressure hydraulic flow-control valves for agricultural applications. A closed helical coil spring, when pressurized, will provide a controlled flow between the coils when extended or laterally deflected a given distance. Tests revealed severe longitudinal oscillations when operating in the extension mode, resulting in a very low fatigue life. The lateral deflection mode did not exhibit these oscillations but did exhibit a surge phenomenon at higher pressures.
A four-way closed center spring valve was built using four externally pressurized springs operating in the lateral deflection mode. A unique cable actuation system provided good proportional control with minimum deadzone and tolerancing. Tests showed that performance was acceptable up to approximately 1,000 psi but surges at higher pressures deteriorated performance.
As a result of this study it is concluded that spring valves have applications at moderate pressures but operation at higher pressures is not practical.
Advisors/Committee Members: Budney, D., Danyluk, H. T., Ukrainetz, Paul R., Hertz, P. Barry, Wilson, J. N..
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APA (6th Edition):
Campbell, D. W. (1974). Investigation of spring valves. (Thesis). University of Saskatchewan. Retrieved from http://hdl.handle.net/10388/etd-07152010-103652
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):
Campbell, Douglas William. “Investigation of spring valves.” 1974. Thesis, University of Saskatchewan. Accessed March 05, 2021.
http://hdl.handle.net/10388/etd-07152010-103652.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Campbell, Douglas William. “Investigation of spring valves.” 1974. Web. 05 Mar 2021.
Vancouver:
Campbell DW. Investigation of spring valves. [Internet] [Thesis]. University of Saskatchewan; 1974. [cited 2021 Mar 05].
Available from: http://hdl.handle.net/10388/etd-07152010-103652.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Campbell DW. Investigation of spring valves. [Thesis]. University of Saskatchewan; 1974. Available from: http://hdl.handle.net/10388/etd-07152010-103652
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of Saskatchewan
3.
Taheri-Ardebili, Abdolreza.
Evaluation of electroless nickel-phosphorus (EN) coatings.
Degree: 2002, University of Saskatchewan
URL: http://hdl.handle.net/10388/etd-02282003-125442
► The utilization of Electroless Nickel-Phosphorus (EN) coatings has witnessed a staggering increase during the last two decades. Many outstanding characteristics of the EN coating method…
(more)
▼ The utilization of Electroless Nickel-Phosphorus (EN) coatings has witnessed a staggering increase during the last two decades. Many outstanding characteristics of the EN coating method have generated a lot of interest in various industries including oil and gas, electronic, chemical, automotive, aerospace, and mining. Some of the highlighted characteristics of EN coatings are
superior corrosion and wear resistance especially in environments containing H2S and CO2, superior mechanical properties, uniform coating thickness, excellent surface finish properties, superb adhesion characteristics, and wide range of thickness. The EN coating process is based on a redox reaction in which a reducing agent is oxidized and Ni+2 ions are reduced on the surface of the substrate materials. Once the first layer of Ni is deposited, it acts as a catalyst for the process. Consequently, a linear relationship between coating thickness and time usually occurs. If the reducing agent is sodium hypophosphite, the deposit obtained will be a nickel-phosphorus alloy.
The objective of this research was to evaluate various properties of three types of EN coatings,
namely, low, medium, and high phosphorus. In the first phase of this work an automated prototype EN bath was designed and engineered. As a result, three types of EN coatings were deposited on various substrates. In the second phase of this research, various qualitative and quantitive methods were implemented to evaluate various properties of EN coatings. Also, the effects of various coating parameters including coating thickness and phosphorus content on properties of EN coatings were comprehensively investigated. Furthermore, the effect of post heat treatment on various properties of EN coatings was studied. Heat treatment on EN deposits in the range of 300-400 °C for one hour caused the hardness to increase due to the formation of various types of nickel phosphide (NixPy). The results of this study showed that various properties of EN coatings are directly related to the phosphorus content of the coatings. EN coatings with lower phosphorus content are crystalline, hard and brittle. As a result, they have superior wear resistance. On the other hand, EN coatings with higher phosphorus content are amorphous with superior corrosion resistance.
iii EN coatings in general have excellent adhesion properties. However, the degree of adhesion is
affected by several parameters including coating thickness, phosphorus content, post heat treatment, and ductility of the substrate. Moreover, it was shown that due their brittle nature EN coatings in general and heat-treated low phosphorus EN coating in particular have a detrimental effect on fatigue properties of their substrates. It was also shown that EN coatings in general, improve the kinetic coefficient of friction. In
other words, EN coatings exhibit a self-lubricating behavior. Also, it was shown that EN coatings completely follow the surface profile of their substrate unlike conventional electroplating.
Corrosion and wear studies on EN…
Advisors/Committee Members: Yannacopoulos, Spiro, Wegner, Leon D., Sargent, Colin, Hertz, P. Barry, Bergstrom, Donald J..
Subjects/Keywords: EN; nickel phospherous coatings; electroless
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APA (6th Edition):
Taheri-Ardebili, A. (2002). Evaluation of electroless nickel-phosphorus (EN) coatings. (Thesis). University of Saskatchewan. Retrieved from http://hdl.handle.net/10388/etd-02282003-125442
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):
Taheri-Ardebili, Abdolreza. “Evaluation of electroless nickel-phosphorus (EN) coatings.” 2002. Thesis, University of Saskatchewan. Accessed March 05, 2021.
http://hdl.handle.net/10388/etd-02282003-125442.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Taheri-Ardebili, Abdolreza. “Evaluation of electroless nickel-phosphorus (EN) coatings.” 2002. Web. 05 Mar 2021.
Vancouver:
Taheri-Ardebili A. Evaluation of electroless nickel-phosphorus (EN) coatings. [Internet] [Thesis]. University of Saskatchewan; 2002. [cited 2021 Mar 05].
Available from: http://hdl.handle.net/10388/etd-02282003-125442.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Taheri-Ardebili A. Evaluation of electroless nickel-phosphorus (EN) coatings. [Thesis]. University of Saskatchewan; 2002. Available from: http://hdl.handle.net/10388/etd-02282003-125442
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of Saskatchewan
4.
Farhat, Hanan Alsharef.
Effects of multiple wires and welding speed on the microstructures and properties of submerged arc welded X80 steel.
Degree: 2007, University of Saskatchewan
URL: http://hdl.handle.net/10388/etd-08312007-140407
► Currently, the demand for natural gas is increasing as a result of high world energy consumption and rising environmental awareness. As the exploration of natural…
(more)
▼ Currently, the demand for natural gas is increasing as a result of high world energy consumption and rising environmental awareness. As the exploration of natural gas field is expanding towards remote regions, long distance pipelines have been developed. The economical, environmental, and safe movement of gas to the marketplace requires that transmission pipelines designed to operate at high pressure should possess adequate strength and improved toughness over a variety of temperature ranges.
The purpose of this research was to investigate the effect of submerged arc welding (SAW) parameters on the quality and mechanical properties of X80 steel, which was supplied by IPSCO Inc., Regina. The welding was performed using single and double wires and different speeds (16.93, 19.69, 25.4, 29.63 and 33.87mm/s). The weld quality was evaluated using non-destructive testing methods (NDT) such as visual inspection, radiography, and ultrasonic test. The weld bead characteristics were studied using weld geometry measurements. The relationship between the microstructures and mechanical properties of weld deposits was studied by means of hardness measurements, Charpy V-notch test, lateral expansion measurements, tensile test, optical metallography, image analysis, scanning electron microscopy (SEM) and energy dispersive X-ray spectrometry (EDS).It was found that there was a limit to which welding speed could be increased without the weld suffering from severe defects such as lack of penetration and undercut. The use of more than one welding wire improved the maximum welding speed at which good weld quality was maintained. Increasing the welding speed resulted in changes in the weld microstructure through the formation of higher percentage of fine acicular ferrite (AF) grain structure and a reduction in the amount of grain boundary ferrite (GBF) in the weld metal. Changing weld speed also reduced the size of the heat affected zone (HAZ). All of this resulted in improved the mechanical properties of the welded joints.
Advisors/Committee Members: Yannacopoulos, Spiro, Oguocha, Ikechukwuka N., Yang, Qiaoqin, Hertz, P. Barry, Dolovich, Allan T..
Subjects/Keywords: SAW; HSLA; Speed
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APA (6th Edition):
Farhat, H. A. (2007). Effects of multiple wires and welding speed on the microstructures and properties of submerged arc welded X80 steel. (Thesis). University of Saskatchewan. Retrieved from http://hdl.handle.net/10388/etd-08312007-140407
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):
Farhat, Hanan Alsharef. “Effects of multiple wires and welding speed on the microstructures and properties of submerged arc welded X80 steel.” 2007. Thesis, University of Saskatchewan. Accessed March 05, 2021.
http://hdl.handle.net/10388/etd-08312007-140407.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Farhat, Hanan Alsharef. “Effects of multiple wires and welding speed on the microstructures and properties of submerged arc welded X80 steel.” 2007. Web. 05 Mar 2021.
Vancouver:
Farhat HA. Effects of multiple wires and welding speed on the microstructures and properties of submerged arc welded X80 steel. [Internet] [Thesis]. University of Saskatchewan; 2007. [cited 2021 Mar 05].
Available from: http://hdl.handle.net/10388/etd-08312007-140407.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Farhat HA. Effects of multiple wires and welding speed on the microstructures and properties of submerged arc welded X80 steel. [Thesis]. University of Saskatchewan; 2007. Available from: http://hdl.handle.net/10388/etd-08312007-140407
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of Saskatchewan
5.
Richards, Christopher John.
Retrofitting a high-rise residential building to reduce energy use by a factor of 10.
Degree: 2007, University of Saskatchewan
URL: http://hdl.handle.net/10388/etd-04282007-124114
► This thesis details the ways in which energy is consumed in an existing Canadian high-rise apartment building and outlines a strategy to reduce its consumption…
(more)
▼ This thesis details the ways in which energy is consumed in an existing Canadian high-rise apartment building and outlines a strategy to reduce its consumption of grid purchased energy by 90%. Grid purchased energy is targeted because the building is located in
Saskatchewan where energy is predominantly generated from fossil fuels that release greenhouse gas emissions into the environment. Greenhouse gas emissions are targeted because of the growing consensus that human activities are the cause of recent global climate destabilization and the general trend towards global warming. Energy consumption is also a concern because of anticipated resource shortages resulting from increases in both global population and average per capita consumption. Many researchers are beginning to claim that a factor 10 reduction in energy use by industrialized nations will be required in order for our civilization to be sustainable.The building that was studied is an 11 story seniors high-rise with a total above ground floor area of 8,351 m2. It was constructed in 1985, in Saskatoon, SK, and it is an average user of energy for this region of the world and for a building of its size and type. Numerous field measurements were taken in the building, both during this study and previously by the
Saskatchewan Research Council. These measurements were used to create a computer model of the building using EE4. After the computer model of the building was created different energy saving retrofits were simulated and compared. Over 40 retrofits are presented and together they reduce the annual grid purchased energy of the building from 360 kWh/m2 (based on above ground floor area) to 36 kWh/m2, a factor 10 reduction. Natural gas consumption was reduced by approximately 94% and grid purchased electrical consumption was reduced by approximately 81%. As a result of these energy savings, a factor 6.6 reduction (85%) in greenhouse gas emissions was also achieved. The goal of factor 10 could not be achieved only through energy conservation and the final design includes two solar water heating systems and grid-connected photovoltaic panels. These systems were modeled using RETScreen project analysis tools.Capital cost estimates and simple payback periods for each retrofit are also presented. The total cost to retrofit the building is estimated to be 3,123,000 and the resulting utility savings from the retrofits are approximately 150,000 per year. This is a factor 6.0 reduction (83%) in annual utility costs in comparison to the base building. While the typical response to proposing a “green” building is that financial sacrifices are required, there is also research available stating that operating in a more sustainable manner is economically advantageous. This research project adds to the “green building economics” debate by detailing savings and costs for each retrofit and ranking each retrofit that was proposed. The most economically advantageous mechanical system that was added to the building was energy recovery in the outdoor ventilation air. It…
Advisors/Committee Members: Simonson, Carey J., Schoenau, Greg J., Hertz, P. Barry, Dumont, Rob.
Subjects/Keywords: Heat Recovery; Energy Recovery; Mult-Unit Residential; Energy Consumption; Energy Efficiency; Apartment; High-Rise; Building Energy Audit; Solar Energy; Renewable Energy; MURB; Greenhouse Gases
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APA (6th Edition):
Richards, C. J. (2007). Retrofitting a high-rise residential building to reduce energy use by a factor of 10. (Thesis). University of Saskatchewan. Retrieved from http://hdl.handle.net/10388/etd-04282007-124114
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):
Richards, Christopher John. “Retrofitting a high-rise residential building to reduce energy use by a factor of 10.” 2007. Thesis, University of Saskatchewan. Accessed March 05, 2021.
http://hdl.handle.net/10388/etd-04282007-124114.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Richards, Christopher John. “Retrofitting a high-rise residential building to reduce energy use by a factor of 10.” 2007. Web. 05 Mar 2021.
Vancouver:
Richards CJ. Retrofitting a high-rise residential building to reduce energy use by a factor of 10. [Internet] [Thesis]. University of Saskatchewan; 2007. [cited 2021 Mar 05].
Available from: http://hdl.handle.net/10388/etd-04282007-124114.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Richards CJ. Retrofitting a high-rise residential building to reduce energy use by a factor of 10. [Thesis]. University of Saskatchewan; 2007. Available from: http://hdl.handle.net/10388/etd-04282007-124114
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of Saskatchewan
6.
Issariyakul, Titipong.
Biodiesel production from fryer grease.
Degree: 2006, University of Saskatchewan
URL: http://hdl.handle.net/10388/etd-06152006-172706
► Biodiesel is a renewable, biodegradable, environmentally benign fuel for use in the diesel engines. It can be produced from renewable sources such as vegetable oils…
(more)
▼ Biodiesel is a renewable, biodegradable, environmentally benign fuel for use in the diesel engines. It can be produced from renewable sources such as vegetable oils or animal fats. Although this fuel has gained worldwide recognition for many years, it is not being widely commercialized mainly because it is more expensive than petroleum diesel. A cheaper feedstock, such as fryer grease, may be used to improve the economics of biodiesel. Methanol is the most common alcohol used in the transesterification process due to its low cost. However, recently, ethanol has been promoted as an alcohol for use in transesterification since it can be produced from renewable resources such as switchgrass, corn and wood, thereby reducing the dependency on petroleum sources (Pimentel and Patzek, 2005). A mixture of methanol and ethanol is hypothesized to take the advantages of both methanol and ethanol. The present work is focused on the production of biodiesel from fryer grease via transesterification with various mixtures of methanol and ethanol. Also, the kinetics of transesterification from fryer grease was studied. Since fryer grease contains a high concentration of free fatty acids (FFA) (5.6 wt. %) and water (7.3 wt. %), a two-step acid/alkaline transesterification process was used to produce the esters. Sulfuric acid and potassium hydroxide were used as acid and alkaline catalysts, respectively. The methanol to ethanol molar ratio was varied from 3:3 to 5:1, whereas alcohol to oil molar ratio was maintained at 6:1. After the fryer grease was transesterified, all esters met ASTM standard D-6751. The viscosity of these esters ranged from 4.7 to 5.9 mm2/s. The heating value of the esters was approximately 10% less than that of petroleum diesel. The cloud point and pour point were in the range of 1 to -1 °C and -3 to -6 °C, respectively. When the mixed alcohol was used ethyl esters were also formed at a lower concentration along with methyl esters. The dominant fatty acid in fryer grease esters was found to be oleic acid. The lubricity of kerosene fuel was improved by as much as 33 % through the addition of these esters at rates as low as 1 %. For the kinetic study of alkali-catalyzed transesterification of fryer grease, the alcohol to oil molar ratio, the reaction temperature, and the catalyst loading were varied as 6:1, 9:1, 12:1; 30, 40, 50 °C; and 0.5, 1.0, 1.5 %, respectively. The ester concentration was found to rise with an increase in the catalyst loading or the reaction temperature and with a decrease in the alcohol to oil molar ratio. The overall forward and backward reaction orders were assumed to follow first and second order kinetics, respectively. The kinetic parameters were calculated using MATLAB. The conversion of triglyceride to diglyceride was found to be the rate determining step (RDS) of the overall reaction, with an activation energy of 36.9 kJ/mol.
Advisors/Committee Members: Dalai, Ajay K., Peng, Ding-Yu, Hertz, P. Barry, Evitts, Richard W., Bakhshi, Narendra N..
Subjects/Keywords: fryer grease; transesterification; biodiesel
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APA (6th Edition):
Issariyakul, T. (2006). Biodiesel production from fryer grease. (Thesis). University of Saskatchewan. Retrieved from http://hdl.handle.net/10388/etd-06152006-172706
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):
Issariyakul, Titipong. “Biodiesel production from fryer grease.” 2006. Thesis, University of Saskatchewan. Accessed March 05, 2021.
http://hdl.handle.net/10388/etd-06152006-172706.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Issariyakul, Titipong. “Biodiesel production from fryer grease.” 2006. Web. 05 Mar 2021.
Vancouver:
Issariyakul T. Biodiesel production from fryer grease. [Internet] [Thesis]. University of Saskatchewan; 2006. [cited 2021 Mar 05].
Available from: http://hdl.handle.net/10388/etd-06152006-172706.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Issariyakul T. Biodiesel production from fryer grease. [Thesis]. University of Saskatchewan; 2006. Available from: http://hdl.handle.net/10388/etd-06152006-172706
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of Saskatchewan
7.
Couraud, Amelie.
Truck transport emissions model.
Degree: 2007, University of Saskatchewan
URL: http://hdl.handle.net/10388/etd-09072007-101348
► In the past, transportation related economic analysis has considered agency related costs only. However, transportation managers are moving towards more holistic economic analysis including road…
(more)
▼ In the past, transportation related economic analysis has considered agency related costs only. However, transportation managers are moving towards more holistic economic analysis including road user and environmental costs and benefits. In particular, transportation air pollution is causing increasing harm to health and the environment. Transport managers are now considering related emissions in transport economical analyses, and have established strategies to help meet Kyoto Protocol targets, which specified a fifteen percent reduction in Canada's emissions related to 1990 levels within 2008-2012.The objectives of this research are to model heavy vehicle emissions using a emissions computer model which is able to assess various transport applications, and help improve holistic economic transport modeling. Two case studies were evaluated with the model developed.Firstly, the environmental benefits of deploying weigh-in-motion systems at weigh stations to pre-sort heavy vehicles and reduce delays were assessed. The second case study evaluates alternative truck sizes and road upgrades within short heavy oilfield haul in Western Canada. The model developed herein employed a deterministic framework from a sensitivity analysis across independent variables, which identified the most sensitive variables to primary field state conditions. The variables found to be significant included idling time for the weigh-in-motion case study, road stiffness and road grades for the short heavy haul oilfield case study.According to this research, employing WIM at weigh stations would reduce annual Canadian transportation CO2 emissions by nearly 228 kilo tonnes, or 1.04 percent of the Canadian Kyoto Protocol targets. Regarding direct fuel savings, WIM would save from 90 to 190 million litres of fuel annually, or between 59 and 190 million of direct operating costs.Regarding the short heavy oil haul case study, increasing allowable heavy vehicle sizes while upgrading roads could decrease the annual emissions, the fuel consumption, and their associated costs by an average of 68 percent. Therefore, this could reduce each rural
Saskatchewan municipality's annual CO2 emissions from 13 to 26.7-kilo tonnes, which translates to 0.06 and 0.12 percent of the Canadian Kyoto Protocol targets or between 544,000 and 1.1 million annually. Based on these results, the model demonstrates its functionality, and was successfully applied to two typical transportation field state applications. The model generated emissions savings results that appear to be realistic, in terms of potential Kyoto targets, as well as users cost reductions and fuel savings.
Advisors/Committee Members: Berthelot, Curtis, Sparks, Gordon A., Pufahl, Dennis E., Hertz, P. Barry.
Subjects/Keywords: truck size; deterministic model; road uprgades; short heavy haul; emissions costs; weigh-in-motion system; sustainable develpment; emissions rates
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APA (6th Edition):
Couraud, A. (2007). Truck transport emissions model. (Thesis). University of Saskatchewan. Retrieved from http://hdl.handle.net/10388/etd-09072007-101348
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):
Couraud, Amelie. “Truck transport emissions model.” 2007. Thesis, University of Saskatchewan. Accessed March 05, 2021.
http://hdl.handle.net/10388/etd-09072007-101348.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Couraud, Amelie. “Truck transport emissions model.” 2007. Web. 05 Mar 2021.
Vancouver:
Couraud A. Truck transport emissions model. [Internet] [Thesis]. University of Saskatchewan; 2007. [cited 2021 Mar 05].
Available from: http://hdl.handle.net/10388/etd-09072007-101348.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Couraud A. Truck transport emissions model. [Thesis]. University of Saskatchewan; 2007. Available from: http://hdl.handle.net/10388/etd-09072007-101348
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of Saskatchewan
8.
Husband, Jason Burkley.
Developing an efficient FEM structural simulation of a fan blade off test in a turbofan jet engine.
Degree: 2007, University of Saskatchewan
URL: http://hdl.handle.net/10388/etd-10292007-111221
► This work develops a methodology for full engine FEA simulation of the fan blade off containment test for a jet engine using LS-Dyna. The fan…
(more)
▼ This work develops a methodology for full engine FEA simulation of the fan blade off containment test for a jet engine using LS-Dyna. The fan blade off containment test is a safety requirement involving the intentional release of a fan blade when the engine is running at full power. The released blade must not pierce or fracture the engine cases during the impact or rotating unbalance. The novel feature of the LS-Dyna simulation is the extensive full engine geometry as well as the widespread use of nonlinearities (mainly plasticity and friction) to absorb the large kinetic energies of the engine rotors. The methodology is simple to use, runs quickly and is being recognized by industry as a contender for widespread implementation. Future applications look promising enough that the methodology warrants further development and refinement.
Advisors/Committee Members: Szyszkowski, Walerian, Oguocha, Ikechukwuka N., Lawrence, Charles, Hertz, P. Barry, Fotouhi, Reza, Boulfiza, Mohamed.
Subjects/Keywords: LS-Dyna; finite element method; jet engine fan blade containment
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APA (6th Edition):
Husband, J. B. (2007). Developing an efficient FEM structural simulation of a fan blade off test in a turbofan jet engine. (Thesis). University of Saskatchewan. Retrieved from http://hdl.handle.net/10388/etd-10292007-111221
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):
Husband, Jason Burkley. “Developing an efficient FEM structural simulation of a fan blade off test in a turbofan jet engine.” 2007. Thesis, University of Saskatchewan. Accessed March 05, 2021.
http://hdl.handle.net/10388/etd-10292007-111221.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Husband, Jason Burkley. “Developing an efficient FEM structural simulation of a fan blade off test in a turbofan jet engine.” 2007. Web. 05 Mar 2021.
Vancouver:
Husband JB. Developing an efficient FEM structural simulation of a fan blade off test in a turbofan jet engine. [Internet] [Thesis]. University of Saskatchewan; 2007. [cited 2021 Mar 05].
Available from: http://hdl.handle.net/10388/etd-10292007-111221.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Husband JB. Developing an efficient FEM structural simulation of a fan blade off test in a turbofan jet engine. [Thesis]. University of Saskatchewan; 2007. Available from: http://hdl.handle.net/10388/etd-10292007-111221
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of Saskatchewan
9.
Huang, Dange.
Basic considerations in electrical generating capacity adequacy evaluation.
Degree: 2005, University of Saskatchewan
URL: http://hdl.handle.net/10388/etd-09192005-164823
► The primary function of a power system is to supply its customers with electrical energy as economically as possible and with acceptable reliability and quality.…
(more)
▼ The primary function of a power system is to supply its customers with electrical energy as economically as possible and with acceptable reliability and quality. Generating capacity adequacy evaluation is the oldest and most extensively studied aspect of power system reliability assessment. A wide range of methods have been developed to perform this evaluation. Two computer programs were developed based on the analytical and simulation techniques and used as tools in this research work. A number of basic considerations in generating capacity adequacy evaluation are investigated. Generating unit residence time distributions and peaking load units are incorporated in the analysis. Two commonly encountered misconceptions regarding the basic system reliability indices are examined by applying the two programs to two reliability test systems. Reliability index probability distributions can be used to supplement the information provided by the expected index values. The concept of creating distributions and the additional information that can be obtained is illustrated in this thesis. Generating unit residence time distributions are generally categorized as being either exponential or non-exponential in form. The exponential distribution is utilized, however, in virtually all practical system studies. The impacts on the system reliability of non-exponential unit state residence time distributions are examined in this research. Peaking load units and base load units have different operating characteristics. The functions of peaking load units vary with changes in the system operating conditions. This is examined in this research. The conclusions and techniques presented in this thesis should prove valuable in power system planning and operation.
Advisors/Committee Members: Billinton, Roy, Karki, Rajesh, Hertz, P. Barry, Gokaraju, Ramakrishna, Dodds, David E..
Subjects/Keywords: Peaking Load Units; Reliability Evaluation; Derated States
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APA (6th Edition):
Huang, D. (2005). Basic considerations in electrical generating capacity adequacy evaluation. (Thesis). University of Saskatchewan. Retrieved from http://hdl.handle.net/10388/etd-09192005-164823
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):
Huang, Dange. “Basic considerations in electrical generating capacity adequacy evaluation.” 2005. Thesis, University of Saskatchewan. Accessed March 05, 2021.
http://hdl.handle.net/10388/etd-09192005-164823.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Huang, Dange. “Basic considerations in electrical generating capacity adequacy evaluation.” 2005. Web. 05 Mar 2021.
Vancouver:
Huang D. Basic considerations in electrical generating capacity adequacy evaluation. [Internet] [Thesis]. University of Saskatchewan; 2005. [cited 2021 Mar 05].
Available from: http://hdl.handle.net/10388/etd-09192005-164823.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Huang D. Basic considerations in electrical generating capacity adequacy evaluation. [Thesis]. University of Saskatchewan; 2005. Available from: http://hdl.handle.net/10388/etd-09192005-164823
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of Saskatchewan
10.
Wei, Zeping.
Stresses and deformations in involute spur gears by finite element method.
Degree: 2004, University of Saskatchewan
URL: http://hdl.handle.net/10388/etd-10272004-163322
► This thesis investigates the characteristics of an involute gear system including contact stresses, bending stresses, and the transmission errors of gears in mesh. Gearing is…
(more)
▼ This thesis investigates the characteristics of an involute gear system including contact stresses, bending stresses, and the transmission errors of gears in mesh. Gearing is one of the most critical components in mechanical power transmission systems. Transmission error is considered to be one of the main contributors to noise and vibration in a gear set. Transmission error measurement has become popular as an area of research on gears and is possible method for quality control. To estimate transmission error in a gear system, the characteristics of involute spur gears were analyzed by using the finite element method. The contact stresses were examined using 2-D FEM models. The bending stresses in the tooth root were examined using a 3-D FEM model.
Current methods of calculating gear contact stresses use Hertz’s equations, which were originally derived for contact between two cylinders. To enable the investigation of contact problems with FEM, the stiffness relationship between the two contact areas is usually established through a spring placed between the two contacting areas. This can be achieved by inserting a contact element placed in between the two areas where contact occurs. The results of the two dimensional FEM analyses from ANSYS are presented. These stresses were compared with the theoretical values. Both results agree very well. This indicates that the FEM model is accurate.
This thesis also considers the variations of the whole gear body stiffness arising from the gear body rotation due to bending deflection, shearing displacement and contact deformation. Many different positions within the meshing cycle were investigated.
Advisors/Committee Members: Watson, L. Glen, Szyszkowski, Walerian, Kushwaha, Radhey Lal, Hertz, P. Barry, Dolovich, Allan T., Zhang, W. J. (Chris).
Subjects/Keywords: Contact and Bending Stress; Transmission Error; FEA
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APA ·
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MLA ·
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CSE |
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Manager
APA (6th Edition):
Wei, Z. (2004). Stresses and deformations in involute spur gears by finite element method. (Thesis). University of Saskatchewan. Retrieved from http://hdl.handle.net/10388/etd-10272004-163322
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):
Wei, Zeping. “Stresses and deformations in involute spur gears by finite element method.” 2004. Thesis, University of Saskatchewan. Accessed March 05, 2021.
http://hdl.handle.net/10388/etd-10272004-163322.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Wei, Zeping. “Stresses and deformations in involute spur gears by finite element method.” 2004. Web. 05 Mar 2021.
Vancouver:
Wei Z. Stresses and deformations in involute spur gears by finite element method. [Internet] [Thesis]. University of Saskatchewan; 2004. [cited 2021 Mar 05].
Available from: http://hdl.handle.net/10388/etd-10272004-163322.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Wei Z. Stresses and deformations in involute spur gears by finite element method. [Thesis]. University of Saskatchewan; 2004. Available from: http://hdl.handle.net/10388/etd-10272004-163322
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of Saskatchewan
11.
Tjiptoprodjo, Ranier Clement.
On a finite element approach to modeling of piezoelectric element driven compliant mechanisms.
Degree: 2005, University of Saskatchewan
URL: http://hdl.handle.net/10388/etd-04112005-130655
► Micro-motion devices may share a common architecture such that they have a main body of compliant material and some direct actuation elements (e.g., piezoelectric element).…
(more)
▼ Micro-motion devices may share a common architecture such that they have a main body of compliant material and some direct actuation elements (e.g., piezoelectric element). The shape of such a compliant material is designed with notches and holes on it, and in this way one portion of the material deforms significantly with respect to other portions of the material – a motion in the conventional sense of the rigid body mechanism. The devices of this kind are called compliant mechanisms. Computer tools for the kinematical and dynamic motion analysis of the compliant mechanism are not well-developed.
In this thesis a study is presented towards a finite element approach to the motion analysis of compliant mechanisms. This approach makes it possible to compute the kinematical motion of the compliant mechanism within which the piezoelectric actuation element is embedded, as opposed to those existing approaches where the piezoelectric actuation element is either ignored or overly simplified. Further, the developed approach allows computing the global stiffness and the natural frequency of the compliant mechanism.
This thesis also presents a prototype compliant mechanism and a test bed for measuring various behaviors of the prototype mechanism. It is shown that the developed approach can improve the prediction of motions of the compliant mechanism with respect to the existing approaches based on a comparison of the measured result (on the prototype) and the simulated result. The approach to computation of the global stiffness and the natural frequency of the compliant mechanism is validated by comparing it with other known approaches for some simple mechanisms.
Advisors/Committee Members: Zhang, W. J. (Chris), Kushwaha, Radhey Lal, Hertz, P. Barry, Gupta, Madan M., Dolovich, Allan T., Chen, X. B. (Daniel).
Subjects/Keywords: finite element modeling; compliant mechanism; pzt actuator; ANSYS
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APA ·
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APA (6th Edition):
Tjiptoprodjo, R. C. (2005). On a finite element approach to modeling of piezoelectric element driven compliant mechanisms. (Thesis). University of Saskatchewan. Retrieved from http://hdl.handle.net/10388/etd-04112005-130655
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):
Tjiptoprodjo, Ranier Clement. “On a finite element approach to modeling of piezoelectric element driven compliant mechanisms.” 2005. Thesis, University of Saskatchewan. Accessed March 05, 2021.
http://hdl.handle.net/10388/etd-04112005-130655.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Tjiptoprodjo, Ranier Clement. “On a finite element approach to modeling of piezoelectric element driven compliant mechanisms.” 2005. Web. 05 Mar 2021.
Vancouver:
Tjiptoprodjo RC. On a finite element approach to modeling of piezoelectric element driven compliant mechanisms. [Internet] [Thesis]. University of Saskatchewan; 2005. [cited 2021 Mar 05].
Available from: http://hdl.handle.net/10388/etd-04112005-130655.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Tjiptoprodjo RC. On a finite element approach to modeling of piezoelectric element driven compliant mechanisms. [Thesis]. University of Saskatchewan; 2005. Available from: http://hdl.handle.net/10388/etd-04112005-130655
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of Saskatchewan
12.
Atta-Konadu, Rodney Kwaku Chapman.
Design and implementation of a modular controller for robotic machines.
Degree: 2006, University of Saskatchewan
URL: http://hdl.handle.net/10388/etd-09222006-151842
► This research focused on the design and implementation of an Intelligent Modular Controller (IMC) architecture designed to be reconfigurable over a robust network. The design…
(more)
▼ This research focused on the design and implementation of an Intelligent Modular Controller (IMC) architecture designed to be reconfigurable over a robust network. The design incorporates novel communication, hardware, and software architectures. This was motivated by current industrial needs for distributed control systems due to growing demand for less complexity, more processing power, flexibility, and greater fault tolerance. To this end, three main contributions were made. Most distributed control architectures depend on multi-tier heterogeneous communication networks requiring linking devices and/or complex middleware. In this study, first, a communication architecture was proposed and implemented with a homogenous network employing the ubiquitous Ethernet for both real-time and non real-time communication. This was achieved by a producer-consumer coordination model for real-time data communication over a segmented network, and a client-server model for point-to-point transactions. The protocols deployed use a Time-Triggered (TT) approach to schedule real-time tasks on the network. Unlike other TT approaches, the scheduling mechanism does not need to be configured explicitly when controller nodes are added or removed. An implicit clock synchronization technique was also developed to complement the architecture. Second, a reconfigurable mechanism based on an auto-configuration protocol was developed. Modules on the network use this protocol to automatically detect themselves, establish communication, and negotiate for a desired configuration. Third, the research demonstrated hardware/software co-design as a contribution to the growing discipline of mechatronics. The IMC consists of a motion controller board designed and prototyped in-house, and a Java microcontroller. An IMC is mapped to each machine/robot axis, and an additional IMC can be configured to serve as a real-time coordinator. The entire architecture was implemented in Java, thus reinforcing uniformity, simplicity, modularity, and openness. Evaluation results showed the potential of the flexible controller to meet medium to high performance machining requirements.
Advisors/Committee Members: Zhang, W. J. (Chris), Lang, Sherman, Schoenau, Greg J., Pufahl, Dennis E., Orban, Peter, Hertz, P. Barry, Gander, Robert, Dolovich, Allan T..
Subjects/Keywords: software architecture; hardware architecture; communication architecture; distributed control; embedded systems; real-time network; robots; Ethernet; Zeroconf; reconfigurable; object-oriented; Java; modular
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APA ·
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APA (6th Edition):
Atta-Konadu, R. K. C. (2006). Design and implementation of a modular controller for robotic machines. (Thesis). University of Saskatchewan. Retrieved from http://hdl.handle.net/10388/etd-09222006-151842
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):
Atta-Konadu, Rodney Kwaku Chapman. “Design and implementation of a modular controller for robotic machines.” 2006. Thesis, University of Saskatchewan. Accessed March 05, 2021.
http://hdl.handle.net/10388/etd-09222006-151842.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Atta-Konadu, Rodney Kwaku Chapman. “Design and implementation of a modular controller for robotic machines.” 2006. Web. 05 Mar 2021.
Vancouver:
Atta-Konadu RKC. Design and implementation of a modular controller for robotic machines. [Internet] [Thesis]. University of Saskatchewan; 2006. [cited 2021 Mar 05].
Available from: http://hdl.handle.net/10388/etd-09222006-151842.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Atta-Konadu RKC. Design and implementation of a modular controller for robotic machines. [Thesis]. University of Saskatchewan; 2006. Available from: http://hdl.handle.net/10388/etd-09222006-151842
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
. 
Open Access Theses and Dissertations