Journal of the Korean Solar Energy Society (한국태양에너지학회 논문집)

The Korean Solar Energy Society (한국태양에너지학회)
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Improvement of Efficiency of Kalina Cycle and Performance Comparison

Kalina 사이클의 효율 향상 방안 및 성능 비교

  • Yoon, Jung-In (Department of Refrigeration and Air Conditioning Engineering, Pukyong University) ;
  • Son, Chang-Hyo (Department of Refrigeration and Air Conditioning Engineering, Pukyong University) ;
  • Choi, Kwang-Hwan (Department of Refrigeration and Air Conditioning Engineering, Pukyong University) ;
  • Son, Chang-Min (Graduate school of Refrigeration and Air Conditioning Engineering, Pukyong University) ;
  • Seol, Sung-Hoon (Graduate school of Refrigeration and Air Conditioning Engineering, Pukyong University) ;
  • Lee, Ho-Saeng (Korea Research Institute of Ships & Ocean Engineering, Seawater Utilization Plant Research Center) ;
  • Kim, Hyeon-Ju (Korea Research Institute of Ships & Ocean Engineering, Seawater Utilization Plant Research Center)
  • 윤정인 (부경대학교 냉동공조공학과) ;
  • 손창효 (부경대학교 냉동공조공학과) ;
  • 최광환 (부경대학교 냉동공조공학과) ;
  • 손창민 (부경대학교 냉동공조공학과 대학원) ;
  • 설성훈 (부경대학교 냉동공조공학과 대학원) ;
  • 이호생 (선박해양플랜트연구소 해수플랜트연구센터) ;
  • 김현주 (선박해양플랜트연구소 해수플랜트연구센터)
  • Received : 2015.08.20
  • Accepted : 2015.10.12
  • Published : 2015.10.30
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Abstract

In this paper, EP-Kalina cycle applying liquid-vapor ejector and motive pump is newly proposed. In this EP-Kalina cycle, the liquid-vapor ejector is used to increase pressure difference between inlet and outlet of the turbine. Also the motive pump enhances the performance of liquid-vapor ejector, resulting in increase of system efficiency of OTEC cycles. The comparison cycles in this study are basic, Kalina, EKalina and EP-Kalina ones. The pump work, net power, APRe, APRc, TPP and system efficiency of each cycle are compared. In case of net power, EP-Kalina cycle is lowest among the cycles due to the application of the motive pump. But, the net power difference of cycles seems to be minor since the pump work of cycles is merely about 1kW, compared to turbine gross power of 20kW. The system efficiency of EP-Kalina cycle shows 3.22%, relatively 44% higher than that of basic OTEC cycle. Therefore, the system efficiency is increased by applying the liquid-vapor ejector and the motive pump. Additional performance analysis is necessary to optimize the proposed EP-Kalina cycle.

Keywords

References

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