Heikal, Morgan

Miche, Nicolas

Morgan, Robert

Panesar, Angad

English

Increasing fuel prices and CO2 emissions have increased interest in the application of waste heat to power conversion for heavy duty Diesel engines. A systems approach is used to research the benefits of a Bottoming Cycle (BC) applied to an engine utilising a high Exhaust Gas Recirculation (EGR) emissions control strategy. The fuel economy improvement from the use of a BC largely depends on the selected working fluid, the cycle operating condition and the associated process integration. The present simulation study uses water, ethanol, R30, acetone, R245fa and E152a as working fluids for the BC while recovering heat from combinations of high temperature after-cooler, EGR cooler and exhaust gas streams. Starting the working fluid expansion from saturated, superheated and supercritical phase, 10 different cycle arrangements are investigated for maximum power recovery with least impact on the engine cooling module. The two best BC arrangements and operating conditions from optimal performance and system related trade-offs show an additional 9 and 9.5% engine power recovered at a high load condition

University of Brighton Research Portal

The potential of bottoming cycle applied to a high exhaust gas recirculation engine for maximum fuel consumption improvement

https://cris.brighton.ac.uk/ws/files/7245165/The_potential_of_bottoming_cycle_applied_to_a_high_exhaust_gas_recirculation_engine_for_maximum_fuel_consumption_improvement.pdf

The potential of bottoming cycle applied to a high exhaust gas recirculation engine for maximum fuel consumption improvement

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University of Brighton Research Portal