한국수소및신에너지학회논문집 (Transactions of the Korean hydrogen and new energy society)

  • 제23권1호
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  • Pages.65-72
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  • 2012
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  • 1738-7264(pISSN)
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  • 2288-7407(eISSN)
한국수소및신에너지학회 (The Korean Hydrogen and New Energy Society)
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저온열원 활용을 위한 암모니아-물 재생 랭킨사이클의 엑서지 해석

Exergy Analysis of Regenerative Ammonia-Water Rankine Cycle for Use of Low-Temperature Heat Source

  • 김경훈 (금오공과대학교 기계공학과) ;
  • 고형종 (금오공과대학교 기계공학과) ;
  • 김세웅 (금오공과대학교 기계공학과)
  • Kim, Kyoung-Hoon (Department of Mechanical Engineering, Kumoh National Institute of Technology) ;
  • Ko, Hyung-Jong (Department of Mechanical Engineering, Kumoh National Institute of Technology) ;
  • Kim, Se-Woong (Department of Mechanical Engineering, Kumoh National Institute of Technology)
  • 투고 : 2012.01.25
  • 심사 : 2012.02.24
  • 발행 : 2012.02.28
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초록

Rankine cycle using ammonia-water mixture as a working fluid has attracted much attention, since it may be a very useful device to extract power from low-temperature heat source. In this work, the thermodynamic performance of regenerative ammonia-water Rankine cycle is thoroughly investigated based on the second law of thermodynamics and exergy analysis, when the energy source is low-temperature heat source in the form of sensible energy. In analyzing the power cycle, several key system parameters such as ammonia mass concentration in the mixture and turbine inlet pressure are studied to examine their effects on the system performance including exergy destructions or anergies of system components, efficiencies based on the first and second laws of thermodynamics. The results show that as the ammonia concentration increases, exergy exhaust increases but exergy destruction at the heat exchanger increases. The second-law efficiency has an optimum value with respect to the ammonia concentration.

키워드

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피인용 문헌

  1. 저온 열원 및 LNG 냉열을 이용하는 복합 발전 사이클의 성능 해석 vol.23, pp.4, 2012, https://doi.org/10.7316/khnes.2012.23.4.382