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The Korean Hydrogen and New Energy Society (한국수소및신에너지학회)
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Performance Characteristics of a Combined Regenerative Ammonia-Water Based Power Generation Cycle Using LNG Cold Energy

LNG 냉열을 이용하는 암모니아-물 복합 재생 동력 사이클의 성능 특성

  • Kim, Kyounghoon (Department of Mechanical Engineering Kumoh National Institute of Technology) ;
  • Oh, Jaehyeong (Graduate School, Kumoh National Institute of Technology) ;
  • Jeong, Youngguan (Department of Mechanical Engineering Kumoh National Institute of Technology)
  • 김경훈 (금오공과대학교 기계공학과) ;
  • 오재형 (금오공과대학교 대학원) ;
  • 정영관 (금오공과대학교 기계공학과)
  • Received : 2013.09.30
  • Accepted : 2013.12.31
  • Published : 2013.12.31
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Abstract

The ammonia-water based power generation cycle utilizing liquefied natural gas (LNG) as its heat sink has attracted much attention, since the ammonia-water cycle has many thermodynamic advantages in conversion of low-grade heat source in the form of sensible energy and LNG has a great cold energy. In this paper, we carry out thermodynamic performance analysis of a combined power generation cycle which is consisted of an ammonia-water regenerative Rankine cycle and LNG power generation cycle. LNG is able to condense the ammonia-water mixture at a very low condensing temperature in a heat exchanger, which leads to an increased power output. Based on the thermodynamic models, the effects of the key parameters such as source temperature, ammonia concentration and turbine inlet pressure on the characteristics of system are throughly investigated. The results show that the thermodynamic performance of the ammonia-water power generation cycle can be improved by the LNG cold energy and there exist an optimum ammonia concentration to reach the maximum system net work production.

Keywords

References

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