Journal of the Korean Society for Geothermal and Hydrothermal Energy (한국지열·수열에너지학회논문집)

Korean Society for Geothermal and Hydrothermal Energy (한국지열·수열에너지학회)
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Study on the Performance of a Cascade Heat Pump with Two-stage Water Heating Process

2단 승온 캐스케이드 히트펌프의 성능 특성에 관한 연구

  • Jang, Hanbyeoul (Graduate School of Mechanical Engineering, Hanbant National University) ;
  • Choi, Jong Min (Department of Mechanical Engineering, Hanbant National University)
  • 장한별 (한밭대학교 기계공학과 대학원) ;
  • 최종민 (한밭대학교 기계공학과)
  • Received : 2016.10.21
  • Accepted : 2016.11.28
  • Published : 2016.12.01
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Abstract

It is estimated that only heating and cooling take about one third of the total energy consumption worldwide. However, the conventional heating and cooling systems have low efficiencies. Also, boilers and electric heaters that are mostly used to generate both domestic and industrial hot water are inefficient and high energy consumers. For this reason, cascade heat pumps which are known to be very energy efficient and have less environmental impact are being promoted to replace conventional heating, cooling and hot water systems. In this study, a newly designed cascade heat pump by two-stage water heating method has been experimentally investigated. By adopting the auxiliary heat exchanger, the performance of the system was increased. The performance enhancement rate of the system could be maximized by adjusting the low stage compressor speed rather than the high stage compressor speed. The performance of the system with the auxiliary heat exchanger was enhanced by 16.5%.

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References

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