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Full-Text Articles in Engineering
Isentropic Efficiency And Theoretical Analysis Of The Planetary Rotor Expander, Joseph L. James
Isentropic Efficiency And Theoretical Analysis Of The Planetary Rotor Expander, Joseph L. James
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Expanders allow pressurized fluids to undergo a pressure decrease in a controlled environment via volumetric growth to extract fluid energy. There are many types of expanders, and the objective of this thesis is to model the efficiencies of the planetary rotor expander (PRE), a century-old design undeveloped due to insufficient manufacturing capabilities (until recently). Geometric relationships are derived and mathematical models are generated to determine the efficiency of the PRE as a function of design variables. Two industrially relevant case studies show that, to maximize isentropic efficiency, the planetary rotor expander (PRE) rotational frequency is maximized and rotor geometry optimized.
Transportation Economics And Energy, Ali Soltani Sobh
Transportation Economics And Energy, Ali Soltani Sobh
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Transportation is one of the major energy consuming sectors in the United States. The continued growth in fuel consumption not only increases dependency on foreign oil but also causes environmental issues due to the emissions of greenhouse gas (GHG). High gasoline consumption in the US transportation sector not only raises concerns regarding national energy security, but also poses many questions regarding the resulting environmental impacts of greenhouse gases emissions. Improvement in automobile fuel economy, increase the use of natural gas vehicles and electric vehicles have been proven to be as the policies in controlling oil demand and GHG emissions in …
Heterogeneous Water And Energy End-Uses And Implications For Residential Water And Energy Conservation And Management, Adel M. Abdallah
Heterogeneous Water And Energy End-Uses And Implications For Residential Water And Energy Conservation And Management, Adel M. Abdallah
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Indoor water-use consumes energy to heat hot water. Indoor water- and energy-use vary significantly among households due to variable household water-use behaviors and varying ages and efficiencies of water appliances. Also, the energy consumed to heat water varies among households and depends on water heater efficiency, heater thermostat setup, percentage of hot water in the final used water, and the cold water intake temperature. This research considers behavioral and technological variability in household water-and-energy-use to better understand water and energy linkages and help utilities target water and energy conservation actions to customer and appliances within their homes that the most …