Journal of Power System Engineering (동력기계공학회지)

The Korean Society for Power System Engineering (한국동력기계공학회)
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Performance Analysis of Ejector-Pump Thermal Energy Conversion System Using Various Working Fluids

이젝터-펌프 온도차발전시스템의 작동유체별 성능분석

  • Yoon, Jung-In (Pukyong National University, Refrigeration and Air-conditioning Engineering Department) ;
  • Seol, Sung-Hoon (Department of Refrigeration and Air-conditioning, Pukyong National University) ;
  • Son, Chang-Hyo (Pukyong National University, Refrigeration and Air-conditioning Engineering Department) ;
  • Choi, Kwang-Hwan (Pukyong National University, Refrigeration and Air-conditioning Engineering Department) ;
  • Kim, Young-Bok (Pukyong National University, Mechanical System Engineering Depratment) ;
  • 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) ;
  • Moon, Jung-Hyun (Korea Research Institute of Ships&Ocean Engineering, Seawater Utilization Plant Research Center)
  • 윤정인 (부경대학교 냉동공조공학과) ;
  • 설성훈 (부경대학교 대학원 냉동공조공학과) ;
  • 손창효 (부경대학교 냉동공조공학과) ;
  • 최광환 (부경대학교 냉동공조공학과) ;
  • 김영복 (부경대학교 기계시스템공학과) ;
  • 이호생 (선박해양플랜트연구소 해수 플랜트연구센터) ;
  • 김현주 (선박해양플랜트연구소 해수 플랜트연구센터) ;
  • 문정현 (선박해양플랜트연구소 해수 플랜트연구센터)
  • Received : 2016.10.20
  • Accepted : 2016.12.09
  • Published : 2016.12.31
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Abstract

This research dealt with performance characteristics of OTEC system applying an ejector and additional pump. Each system using five kinds of working fluids was analyzed, and primary parameters with respect to entrainment ratio were examined: Turbine gross power, evaporation capacity, pump work, efficiency and volume flow ratio. The primary results were as following. The efficiency of ejector-pump OTEC system was dependent on entrainment of the ejector. The degree of efficiency change was different from applied working fluid, and amount of pump work was turned out to be primary factor affected system efficiency. Meanwhile, optimized entrainment ratio was different from applied working fluid since their different vapor density. System efficiency at optimized entrainmet ratio of each working fluid was around 5%, showing minor difference each other.

Keywords

References

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  2. Performance Analysis of Ejector-Pump Thermal Energy Conversion System Applying Feed Liquid Heater vol.22, pp.4, 2018, https://doi.org/10.9726/kspse.2018.22.4.089
  3. Dynamic Simulation of Performance Change of MW-class OTEC according to Seawater Flow Rate vol.23, pp.1, 2016, https://doi.org/10.9726/kspse.2019.23.1.048
  4. Experimental Study of OTEC Cycle using Ejector-Pump vol.23, pp.6, 2016, https://doi.org/10.9726/kspse.2019.23.6.063