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Accession Number DE2012-1045212
Title Thermoelectric Conversion of Waste Heat to Electricity in an IC Engine Powered Vehicle.
Publication Date Apr 2011
Media Count 178p
Personal Author N/A
Abstract The Phase I work provided an evaluation of the use of new thermoelectric materials implemented into a direct energy conversion device to extract electrical energy from the exhaust gases of an over the road Class 8 diesel powerplant. The best current internal combustion engines have a nominal brake efficiency of 40%, with 35% of the fuel energy going to exhaust, and 25% to other losses such as engine. Thus, in the best IC engines 60% of the energy content in the fuel is rejected as heat. The Phase I effort described the technology barriers to overcome for successful implementation of thermoelectric technology to the application described. Although the potential exists for this substantial energy recovery at full power engine output, realistic duty cycles must be examined to critically evaluate potential energy recovery. Such cycles include the mode of operation, electrification of ancillaries, and potential hybridization. In the Phase I effort we considered a relatively conservative operating condition and conducted a detailed analysis of the potential benefits of implementation of this technology for the Class 8 truck application. A significant issue that must be resolved, if thermoelectric devices of practical utility are to be implemented in powertrain systems, is the determination of the configuration of the heat exchanger-thermoelectric device that will offer sufficient energy recovery to justify the cost. Having established a representative operating condition, a detailed engine energy analysis was conducted to evaluate the temperature gradients and heat fluxes available for energy conversion using a thermoelectric generator (TEG). Cummins Engine Company has provided the major guidance in terms of details related to engine operating mode for the application examined. In the Phase I effort, the Michigan State University (MSU) team has established the viability of the power conditioning and energy conversion configuration needed to effectively utilize the electrical energy generated.
Keywords Design
Electric power
Energy recovery
Thermoelectric conversion
Thermoelectric generators
Thermoelectric materials
Waste heat utilization

Source Agency Technical Information Center Oak Ridge Tennessee
NTIS Subject Category 97O - Miscellaneous Energy Conversion & Storage
97K - Fuels
71 - Materials Sciences
Corporate Author Michigan State Univ., East Lansing.
Document Type Technical report
Title Note N/A
NTIS Issue Number 1226
Contract Number DE-FC26-04NT42281

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