Journal of the Korean Solar Energy Society (한국태양에너지학회 논문집)

The Korean Solar Energy Society (한국태양에너지학회)
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The numerical analysis of performance of OTEC system with vapor-vapor ejector

증기-증기 이젝터를 적용한 OTEC 시스템 성능의 수치적 분석

  • Yoon, Jung-In (Department of Refrigeration and Air Conditioning Engineering, Pukyong University) ;
  • Son, Chang-Hyo (Department of Refrigeration and Air Conditioning Engineering, Pukyong University) ;
  • Ye, Byung-Hyo (Graduate school of Refrigeration and Air Conditioning Engineering, Pukyong University) ;
  • Ha, Soo Jeong (Graduate school of Refrigeration and Air Conditioning Engineering, Pukyong University) ;
  • Choi, In-Soo (Tongmyong University) ;
  • Lee, Ho-Saeng (Korea Institute of Oceans Science and Technology, Seawater Utilization Plant Research Center) ;
  • Kim, Hyeon-Ju (Korea Institute of Oceans Science and Technology, Seawater Utilization Plant Research Center)
  • 윤정인 (부경대학교 냉동공조공학과) ;
  • 손창효 (부경대학교 냉동공조공학과) ;
  • 예병효 (부경대학교 냉동공조공학과 대학원) ;
  • 하수정 (부경대학교 냉동공조공학과 대학원) ;
  • 최인수 (동명대학교) ;
  • 이호생 (한국해양과학기술원 해수플랜트연구센터 해양플랜트연구부) ;
  • 김현주 (한국해양과학기술원 해수플랜트연구센터 해양플랜트연구부)
  • Received : 2014.04.28
  • Accepted : 2014.07.18
  • Published : 2014.08.30
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Abstract

In this paper, the Ocean Thermal Energy Conversion(OTEC) with vapor-vapor ejector is proposed newly. At this OTEC system, a vapor-vapor ejector is installed at inlet of condenser. The vapor-vapor ejector plays a very important role in increasing of the production work of low-stage turbine throughout the decrement of outlet pressure of ejector. The performance analysis is conducted for optimizing the system with HYSYS program. The procedure of performance analysis consists of outlet pressure of high turbine, the mass ratio of working fluid at separator, total working fluid rate, and nozzle diameters of vapor-vapor ejector. The main results is summarized as follows. The nozzle diameter is most important thing in this study. When each nozzle diameter of vapor-vapor ejector is 10 mm, the efficiency of OTEC system with vapor-vapor ejector shows the highest value. So it is necessary to set the optimized nozzle diameters of vapor-vapor ejector for achieving the high efficiency OTEC power system.

Keywords

References

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