Performance Analysis of an organic Rankine Cycle applied on Marine Engine for Fourteen Working Fluid

Ehab, Abd ElRahman; Ashraf, Abd ElRahman

doi:10.21608/iugrc.2022.302666

Performance Analysis of an organic Rankine Cycle applied on Marine Engine for Fourteen Working Fluid

Document Type : Original Article

Authors

Department of Ships and Submarine, Military Technical College, Egypt.

10.21608/iugrc.2022.302666

Abstract

Under the world-wide concern about the depletion of fossil fuels and different environmental issues, it is necessary to develop more techniques to enhance the efficiency of energy conversion of fuel and reduce the environmental global warming. Organic Rankine Cycle is an effective method for waste heat recovery from engines. In this study, the performance of an ORC operated by the exhaust of marine engine is numerically evaluated. Commercial software EES32 was used to calculate system performances under specified operating conditions with 14 different working fluids. Various system components were modeled. Different comparisons are carried out between different working fluids, according to their performance, system cost, volume and mass. Toluene was found to be the most promising working fluid with the highest performance indices regarding first low and second low efficiencies. It can produce 117.5 kW power at marine cruising speed with engine power output of 500 KW. The ORC saves 31,169 L of diesel fuel (US$24490) at the end of 1000 operating hours.

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