Thermodynamic Analysis of The Organic Rankine Cycle For Diesel Engine Waste Heat Recovery

n this study, thermodynamic analysis of the organic Rankine cycle (ORC) for a diesel engine waste heat recovery was performed fordifferent working fluids. R123, R245fa, R600a, R236ea and R134a are used as working fluid in the cycle. For temperature of the heatsource in the exhaust of the diesel engine 80-180 oC was chosen. The required thermodynamic values and calculations for the analysiswere calculated by the Engineering Equation Solver (EES) program. For these working fluids, the performance values of the cyclewere studied under different operating conditions. The highest efficiency values were obtained for all operating conditions analyzed inthe organic Rankine cycle using R123 working fluid as %23. In addition, the turbine power is determined as 7.2 kW for the sameoperating conditions.

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