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

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