Journal of Power System Engineering (동력기계공학회지)

The Korean Society for Power System Engineering (한국동력기계공학회)
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Performance analysis of an organic Rankine cycle for waste heat recovery of a passenger car

승용차 폐열 회수용 유기 랭킨 사이클 성능 분석

  • Kim, Hyun-Jin (Department of Mechanical System Engineering, University of Incheon) ;
  • Moon, Je-Hyeon (Department of Mechanical System Engineering, University of Incheon) ;
  • Yu, Je-Seung (Department of Mechanical System Engineering, University of Incheon) ;
  • Lee, Young-Sung (Department of Mechanical System Engineering, University of Incheon)
  • 김현진 (인천대학교 기계시스템공학부) ;
  • 문제현 (인천대학교 기계시스템공학부) ;
  • 유제승 (인천대학교 기계시스템공학부) ;
  • 이영성 (인천대학교 기계시스템공학부)
  • Received : 2012.12.04
  • Accepted : 2013.03.18
  • Published : 2013.04.30
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Abstract

Applicability of organic Rankine cycle for a passenger car with 3.5 L gasoline engine to convert low grade waste heat to useful shaft power has been numerically studied. Working fluid is R134a, and the Rankine cycle is composed of boiler for recovering engine cooling water heat, super heater for recovering exhaust gas heat, scroll expander for converting waste heat to shaft power, condenser for heat emission, internal heat exchanger, and feed pump. Assuming efficiencies of 90% for the heat exchangers, 75% for the scroll expander, and 80% for the feed pump, the Rankine cycle efficiency of 5.53% was calculated at the vehicle speed of 120 km/hr. Net expander shaft output after subtracting the power required to run the pump was 3.22 kW, which was equivalent to 12.1% improvement in fuel consumption. About the same level of improvement in the fuel consumption was obtained over the vehicle speed range of 60 km/hr~120 km/hr.

Keywords

References

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  2. A Study on Performance Characteristics of the Waste Heat Recovery Power System Applied a Scroll Expander and the Combined Condenser with Oil Separator vol.22, pp.2, 2018, https://doi.org/10.9726/kspse.2018.22.2.021