Journal of Hydrogen and New Energy (한국수소및신에너지학회논문집)

The Korean Hydrogen and New Energy Society (한국수소및신에너지학회)
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Effects of Working Fluids on the Performance Characteristics of Organic Rankine Cycle (ORC) Using LNG Cold Energy as Heat Sink

LNG 냉열을 열싱크로 이용하는 유기랭킨사이클(ORC)의 작동유체에 따른 성능 특성

  • Kim, Kyoung Hoon (Department of Mechanical Engineering, Kumoh National Institute of Technology) ;
  • Ha, Jong Man (R&D Division, Korea Gas Corporation) ;
  • Kim, Kyung Chun (School of Mechanical Engineering, Pusan National University)
  • 김경훈 (금오공과대학교 기계공학과) ;
  • 하종만 (한국가스공사 신에너지기술연구센터) ;
  • 김경천 (부산대학교 기계공학부)
  • Received : 2014.03.17
  • Accepted : 2014.04.30
  • Published : 2014.04.30
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Abstract

This paper presents thermodynamic performance analysis of organic Rankine cycle (ORC) using low temperature heat source in the form of sensible energy and using liquefied natural gas (LNG) as heat sink to recover the cryogenic energy of LNG. LNG is able to condense the working fluid at a very low condensing temperature in a heat exchanger, which leads to an increased power output. Based on the mathematical model, a parametric analysis is conducted to examine the effects of eight different working fluids, the turbine inlet pressure and the condensation temperature on the system performance. The results indicate that the thermodynamic performance of ORC such as net work production or thermal efficiency can be significantly improved by the LNG cold energy.

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References

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