Aaron Edward Teo, Srithar Rajoo, Meng Soon Chiong, Kishokanna Paramasivam, Fengxian Tan


Exhaust energy recovery is one of the ways to improve engine’s fuel utilization. Parametric study of Air Brayton Cycle (ABC) as an exhaust energy recovery was done to see its feasibility. Parameters such as the mass flow rate, heat exchanger effectiveness, compressor and turbine efficiencies and heat exchanger pressure drop were analyzed to see their effects. It was found that the ABC can extract up to 3-4 kW of energy from the exhaust of a 5.9 liter diesel engine. This translates to about 3-4% of Brake Specific Fuel Consumption (BSFC) improvement. Careful integration of the main components is crucial to the success of the ABC as an exhaust energy recovery.


Exhaust energy recovery, waste heat recovery, Brayton cycle, pressure ratio

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