Overview of waste heat utilization systems
The heavy truck diesel engine rejects a significant fraction of its fuel energy in the form of waste heat. Historically, the Department of Energy has supported technology efforts for utilization of the diesel exhaust heat. Specifically, the Turbocompound and the Organic Rankine Cycle System (ORCS) have demonstrated that meaningful improvements in highway fuel economy can be realized through waste heat utilization. For heat recovery from the high temperature exhaust of future adiabatic diesel engines, the DOE/NASA are investigating a variety of alternatives based on the Rankine, Brayton, and Stirling power cycles. Initial screening results indicate that systems of this type offer a fuel savings advantage over the turbocompound system. Capital and maintenance cost projections, however, indicate that the alternative power cycles are not competitive on an economic payback basis. Plans call for continued analysis in an attempt to identify a cost effective configuration with adequate fuel savings potential.
- Research Organization:
- National Aeronautics and Space Administration, Cleveland, OH (USA). Lewis Research Center
- DOE Contract Number:
- AI01-80CS50194
- OSTI ID:
- 6282823
- Report Number(s):
- DOE/NASA/50194-41; CONF-8410103-1; NASA-TM-86901; ON: DE85003887
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
320304 -- Energy Conservation
Consumption
& Utilization-- Industrial & Agricultural Processes-- Waste Heat Recovery & Utilization
33 ADVANCED PROPULSION SYSTEMS
330102* -- Internal Combustion Engines-- Diesel
BRAYTON CYCLE
DIESEL ENGINES
ENERGY RECOVERY
ENGINES
FUEL ECONOMY
HEAT ENGINES
HEAT RECOVERY
INTERNAL COMBUSTION ENGINES
PAYBACK PERIOD
RANKINE CYCLE
RECOVERY
STIRLING CYCLE
THERMODYNAMIC CYCLES
TRUCKS
VEHICLES
WASTE HEAT UTILIZATION
WASTE PRODUCT UTILIZATION