A technical review on waste heat recovery from compression ignition engines using organic Rankine cycle

Venkateswarlu Chintala, Suresh Kumar and Jitendra K. Pandey

Renewable and Sustainable Energy Reviews, 2018, vol. 81, issue P1, 493-509

Abstract: The study deals with the utilization of organic Rankine cycle (ORC) to recover waste heat from compression ignition (CI) engines and produce additional power output. A review on the potential of waste heat recovery from exhaust gas, water jackets and intake charge air of CI engines was carried out. Research challenges associated with engine-ORC technology such as selection of organic working fluid, type of evaporator/condenser, back pressure due to additional ORC components in the exhaust line are discussed. The evaporator for the engine-ORC needs to be designed by keeping a view of variable exhaust gas heat source (variable temperature and mass flow rate profiles). It is explored from the literature study that engine-ORC system could operate with the maximum thermal efficiency range about 10–25%. The main reason for low thermal efficiency could be due to lower operating temperatures in the ORC. However, the overall efficiency of combined system (engine and engine-ORC with exhaust gas/water jackets/intake air/use of hot water from condenser for heating/refrigeration application) is significantly higher (60–90%) than the conventional standalone ORC system (10–25%). It is also found that R245fa is the better organic working fluid for engine-ORC application based on better performance, availability, economic and environmental aspects.

Keywords: Organic Rankine cycle; Compression ignition engines; Waste heat recovery; Working fluids (search for similar items in EconPapers)
Date: 2018
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (21)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:rensus:v:81:y:2018:i:p1:p:493-509

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DOI: 10.1016/j.rser.2017.08.016

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