Transactions of the Korean Society of Mechanical Engineers B (대한기계학회논문집B)

The Korean Society of Mechanical Engineers (대한기계학회)
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Potential Performance Enhancement of Dual Heat Pump Systems through Series Operation

히트펌프 직렬운전에 의한 성능 향상 가능성에 관한 연구

  • Baik, Young-Jin (High Efficiency and Clean Energy Research Division, Korea Institute of Energy Research) ;
  • Kim, Min-Sung (High Efficiency and Clean Energy Research Division, Korea Institute of Energy Research) ;
  • Chang, Ki-Chang (High Efficiency and Clean Energy Research Division, Korea Institute of Energy Research) ;
  • Lee, Young-Soo (High Efficiency and Clean Energy Research Division, Korea Institute of Energy Research) ;
  • Kim, Hyeon-Ju (Deep Ocean Water Application Research Center, Korea Ocean Research & Development Institute)
  • 백영진 (한국에너지기술연구원 고효율청정에너지연구본부) ;
  • 김민성 (한국에너지기술연구원 고효율청정에너지연구본부) ;
  • 장기창 (한국에너지기술연구원 고효율청정에너지연구본부) ;
  • 이영수 (한국에너지기술연구원 고효율청정에너지연구본부) ;
  • 김현주 (한국해양연구원 해양심층수연구센터)
  • Received : 2011.12.19
  • Accepted : 2012.06.08
  • Published : 2012.08.01
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Abstract

In this study, the potential performance enhancement in a dual heat pump system through series operation was investigated by a comparison between the performance for parallel and series operation for a heating supply temperature of $60^{\circ}C$. To compare the performance of each configuration fairly, the heat transfer surface area of the heat exchangers was fixed. The inlet temperatures and the flow rates of the heat source and the load were also fixed. In addition, the heat transfer and pressure drop characteristics of the working fluids were considered to achieve a more realistic comparison. The results show that the heating coefficient of performance (COP) of the series configuration is approximately 5% higher than that of the parallel configuration under the simulation conditions considered in the present study.

본 연구에서는 두 대의 히트펌프를 이용하여 $60^{\circ}C$의 난방 공급을 하는 경우에 대하여, 병렬운전을 할 경우의 성능과 직렬운전을 할 경우의 성능을 서로 비교함으로써, 직렬운전에 의한 성능 향상 가능성을 연구하였다. 두 경우의 성능을 공정하게 비교하기 위하여, 히트펌프를 구성하는 열교환기의 전열면적을 고정하였으며, 부하측 및 열원측의 입구 유량 및 온도 조건을 고정하였다. 또한, 보다 현실적인 결과를 위하여 열교환기 내 열전달 및 압력강하 특성을 고려하였다. 시뮬레이션 결과, 직렬운전 시스템의 난방성능계수가 병렬운전 시스템의 난방성능계수에 비해 본 연구의 시뮬레이션 조건 하에서 약 5% 향상 될 수 있음을 관찰하였다.

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References

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