THERMAL SCIENCE

International Scientific Journal

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Thermodynamic analysis of exhaust heat recovery of marine ice using organic rankine cycle

ABSTRACT
The use of organic Rankine cycle power systems for waste heat recovery on marine internal combustion engines can help to mitigate the greenhouse gases and reduce the fuel consumption of the marine engine. In this paper, the internal combustion engine combined with an organic Rankine cycle system was developed to analyze the performance of waste heat recovery from the exhaust gas of a heavy-duty marine diesel engine via five selected working fluids with low global warming potential and ozone depletion potential. The net output power and thermal efficiency for each of the selected working fluids were obtained. Results indicate that the working fluids of butane have the best performance among the selected working fluids with the power efficiency of the organic Rankine cycle subsystem of 12.27% under the power load of 100%. For the overall proposed system, the maximum net power output is 1048kW and the power efficiency is 36.47%. Besides, the total thermal efficiency of the proposed system was 67.94% when considering the recovered waste energy from jacket water.
KEYWORDS
PAPER SUBMITTED: 2022-07-18
PAPER REVISED: 2022-09-05
PAPER ACCEPTED: 2022-09-09
PUBLISHED ONLINE: 2022-11-12
DOI REFERENCE: https://doi.org/10.2298/TSCI220718166W
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