Open Access. Powered by Scholars. Published by Universities.®
- Publication
Articles 1 - 4 of 4
Full-Text Articles in Entire DC Network
Plug-In Hybrid Electric Vehicle Emissions Impacts On Control Strategy And Fuel Economy, David Estes Smith
Plug-In Hybrid Electric Vehicle Emissions Impacts On Control Strategy And Fuel Economy, David Estes Smith
Doctoral Dissertations
Plug-in hybrid electric vehicle (PHEV) technologies have the potential for considerable petroleum consumption reductions, at the expense of increased tailpipe emissions due to multiple "cold" start events and improper use of the engine for PHEV specific operation. PHEVs operate predominantly as electric vehicles (EVs) with intermittent assist from the engine during high power demands. As a consequence, the engine can be subjected to multiple cold start events. These cold start events have a significant impact on the tailpipe emissions due to degraded catalyst performance and starting the engine under less than ideal conditions. On current hybrid electric vehicles (HEVs), the …
Numerical Simulation For The Cooling Of Qps Modular Coils With Embedded Copper Tubes And Subsequent Experimental Verification, Delight Mawunyo Owu
Numerical Simulation For The Cooling Of Qps Modular Coils With Embedded Copper Tubes And Subsequent Experimental Verification, Delight Mawunyo Owu
Masters Theses
Quasi Poloidal Stellarator (QPS) consists of complex shaped modular coils, made of Copper-CTD 403 cyanate ester composite, that are used to carry the heavy current (~30,000 amperes) for the plasma generation. The coils become heated during each plasma pulse from 20°C to about 60°C. The coils need to be cooled back to room temperature after each pulse in order to prevent temperature ratcheting over the duty cycle. After studying various approaches, it was found that the most efficient way of cooling was by passing water through a copper tube embedded inside every conductor. Previously developed numerical approach based on the …
Numerical Simulation ( A Lumped Transient Model) For Qps Modular Coils With Embedded Copper Tubes And Subsequent Experimental Verification, Bhargav Telikicherla Kandala
Numerical Simulation ( A Lumped Transient Model) For Qps Modular Coils With Embedded Copper Tubes And Subsequent Experimental Verification, Bhargav Telikicherla Kandala
Masters Theses
The Quasi-Poloidal Stellerator (QPS) consists of complex shaped modular coils consisting of a tightly packed Cu-polymer composite to carry the high current needed to develop the plasma. During this process, the conductor temperature rises to about 60°C. Before the next current pulse, the conductor must be cooled to room temperature in order to prevent temperature ratcheting over the duty cycle. Computational analysis on various cooling schemes across the conductor cross-section showed that the best results are achieved by internal cooling via copper tubes embedded in the middle of each conductor. The motivation for this research was to develop a simple …
On-Road Emissions Evaluation Of Student-Produced Biodiesel, Scott James Curran
On-Road Emissions Evaluation Of Student-Produced Biodiesel, Scott James Curran
Masters Theses
UT Biodiesel is a small scale, student run Used Frying Oil (UFO) to biodiesel production program at the University of Tennessee, Knoxville. A single batch transesterification reaction using methanol and potassium hydroxide (KOH) as the catalyst is used to produce biodiesel from UFO collected from UT Dining Services. A warm deionized water wash is used to remove contaminants from the biodiesel. A heat and settle method is used to dry the biodiesel. The processor has been shown to be capable of producing fuel that meets the ASTM D6751 specification for biodiesel. The project uses in-house testing to ensure the quality …