Proceedings of the KSME Conference (대한기계학회:학술대회논문집)

The Korean Society of Mechanical Engineers (대한기계학회)
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An Experimental Study on the Performance of a Sea Water Heat Source Cascade Heat Pump

해수열원 캐스케이드 열펌프시스템의 운전 특성에 관한 실험적 연구

  • 김지영 (한국에너지기술연구원 재생에너지연구부 미활용에너지. 지열연구센터) ;
  • 백영진 (한국에너지기술연구원 재생에너지연구부 미활용에너지. 지열연구센터) ;
  • 장기창 (한국에너지기술연구원 재생에너지연구부) ;
  • 박성룡 (한국에너지기술연구원 재생에너지연구부 미활용에너지. 지열연구센터) ;
  • 나호상 (한국에너지기술연구원 재생에너지연구부 미활용에너지. 지열연구센터) ;
  • 이재훈 (국립한밭대학교 기계공학과 대학원)
  • Published : 2007.05.30
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Abstract

The purpose of this study is to investigate the performance of a sea water heat source cascade heat pump system. R717(Ammonia) is used for a low-stage working fluid while R134a is for a high-stage. In order to gain a high temperature supply water in winter season, the system is designed to perform a cascade cycle. In this study, two experiments were carried out. One is a system starting test from the low load temperature of $10^{\circ}C$. The other is a system performance investigation over the R717 compressor capacity changes. Experimental results show that when it starts from the low load temperature, the suction temperature of the low-stage compressor is higher than that of a high-stage. The system performance increases when a water source temperature or a low-stage compressor rotational frequency goes higher.

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