Waste heat recovery from adiabatic diesel engines by exhaust-driven Brayton cycles
This report presents an evaluation of Brayton Bottoming Systems (BBS) as waste heat recovery devices for future adiabatic diesel engines in heavy duty trucks. Parametric studies were performed to evaluate the influence of external and internal design parameters on BBS performance. Conceptual design and trade-off studies were undertaken to estimate the optimum configuration, size, and cost of major hardware components. The potential annual fuel savings of long-haul trucks equipped with BBS were estimated. The addition of a BBS to a turbocharged, nonaftercooled adiabatic engine would improve fuel economy by as much as 12%. In comparison with an aftercooled, turbocompound engine, the BBS-equipped turbocharged engine would offer a 4.4% fuel economy advantage. It is also shown that, if installed in tandem with an aftercooled turbocompound engine, the BBS could effect a 7.2% fuel economy improvement. The cost of a mass-produced 38 Bhp BBS is estimated at about $6460 or $170/Bhp. Technical and economic barriers that would hinder the commercial introduction of bottoming systems were identified.
- Research Organization:
- United Technologies Research Center, East Hartford, CT (USA)
- DOE Contract Number:
- AI01-80CS50194
- OSTI ID:
- 6461549
- Report Number(s):
- DOE/NASA-0304-1; NASA-CR-168257; ON: DE85001608
- Resource Relation:
- Other Information: Portions are illegible in microfiche products. Original copy available until stock is exhausted
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
BRAYTON CYCLE
BOTTOMING CYCLES
DIESEL ENGINES
HEAT RECOVERY EQUIPMENT
ADIABATIC PROCESSES
LIFE-CYCLE COST
PARAMETRIC ANALYSIS
PERFORMANCE
SENSITIVITY ANALYSIS
TRUCKS
WASTE HEAT
COST
ENERGY
ENGINES
EQUIPMENT
HEAT
HEAT ENGINES
INTERNAL COMBUSTION ENGINES
THERMODYNAMIC CYCLES
VEHICLES
WASTES
330102* - Internal Combustion Engines- Diesel