Journal of the Korean Solar Energy Society (한국태양에너지학회 논문집)

The Korean Solar Energy Society (한국태양에너지학회)
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The performance comparison of vapor-vapor ejector OTEC system using wet refrigerants

습냉매를 적용한 증기-증기 이젝터용 OTEC 시스템의 성능비교

  • Yoon, Jung-In (Department of Refrigeration and Air Conditioning Engineering, Pukyong University) ;
  • Son, Chang-Hyo (Department of Refrigeration and Air Conditioning Engineering, Pukyong University) ;
  • Kim, Young-Bok (Department of Mechanical System Engineering, Pukyong University) ;
  • Ye, Byung Hyo (Graduate school of Refrigeration and Air Conditioning Engineering, Pukyong University) ;
  • Ha, Su-Jeong (Graduate school of Refrigeration and Air Conditioning Engineering, Pukyong 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) ;
  • 김영복 (부경대학교 기계시스템공학과) ;
  • 예병효 (부경대학교 냉동공조공학과 대학원) ;
  • 하수정 (부경대학교 냉동공조공학과 대학원) ;
  • 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, OTEC(Ocean Thermal Energy Conversion) system with vapor-vapor ejector is newly proposed. And 6 wet refrigerants are applied into the proposed OTEC system for performance comparison. The results of comparison performance are as follows. In the view of system efficiency, R32/R744(90:10) has the highest efficiency among the 6 refrigerants. In case of evaporation capacity, pump work and mass flow rate of working fluid, R744, R717 and R717 is lowest value, respectively. As this results, the vapor-vapor ejector is able to increase the efficiency of system. And It is necessary to select the optimized working fluid considering environmental and economic factors.

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References

  1. Yoon. J. I, Ye. B. H, Heo. J. H, Kim. H. J and Lee. H. S, Performance analysis of 20 kW OTEC power cycle using various working fluids, Journal of the Korean Society of Marine Engineering, Vol. 37, No. 8, pp. 836-842, 2013 https://doi.org/10.5916/jkosme.2013.37.8.836
  2. Yoon. J. I, Son. C. H, Baek. S. M, Kim. H. J, Lee. H. S, Efficiency comparison of subcritical OTEC power cycle using various working fluids, Journal of Heat and Mass Transfer, Vol. 50, No.7, pp. 985-996, 2014 https://doi.org/10.1007/s00231-014-1310-8
  3. Yoon. J. I, Son. C. H, Ye. B. H, Heo. J. H, Kim. H. J and Lee. H. S, Performance Characteristics of a Mixed Refrigerant OTEC Power Cycle Using Hot Waste Water, Journal of the Korea Society for Power system Engineering, Vol. 17, No. 8, pp. 103-108, 2013 https://doi.org/10.9726/kspse.2013.17.6.102
  4. T. C. Hunga, S. K. Wanga, C. H. Kuob, B. S. Peic, K. F. Tsaid, A study of organic working fluids on system efficiency of an ORC using low-grade energy sources, Journal of the Korea Society for Power system Engineering, Vol. 35, No. 3, pp. 1403-1411, 2013
  5. Athanasios I. Papadopoulos, Mirko stijepovic, Patrick Linke, On the systematic design and selection of optimal working fluids for Organic Rankine Cycles, Applied Thermal Engineering 30, pp. 760-769, 2010 https://doi.org/10.1016/j.applthermaleng.2009.12.006
  6. Aspen HYSYS. Version 8.0, Aspen Technology Inc, 2014