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

The Korean Society of Mechanical Engineers (대한기계학회)
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Experimental Study on Compression/Absorption High-Temperature Hybrid Heat Pump with Natural Refrigerant Mixture

천연혼합냉매를 이용한 압축/흡수식 고온히트펌프의 실험적 연구

  • Kim, Ji-Young (New and Renewable Energy Department, Korea Institute of Energy Research) ;
  • Park, Seong-Ryong (New and Renewable Energy Department, Korea Institute of Energy Research) ;
  • Baik, Young-Jin (New and Renewable Energy Department, Korea Institute of Energy Research) ;
  • Chang, Ki-Chang (New and Renewable Energy Department, Korea Institute of Energy Research) ;
  • Ra, Ho-Sang (New and Renewable Energy Department, Korea Institute of Energy Research) ;
  • Kim, Min-Sung (New and Renewable Energy Department, Korea Institute of Energy Research) ;
  • Kim, Yong-Chan (Dept. of Mechanical Engineering, Korea Univ.)
  • 김지영 (한국에너지기술연구원 신재생에너지연구본부) ;
  • 박성룡 (한국에너지기술연구원 신재생에너지연구본부) ;
  • 백영진 (한국에너지기술연구원 신재생에너지연구본부) ;
  • 장기창 (한국에너지기술연구원 신재생에너지연구본부) ;
  • 나호상 (한국에너지기술연구원 신재생에너지연구본부) ;
  • 김민성 (한국에너지기술연구원 신재생에너지연구본부) ;
  • 김용찬 (고려대학교 기계공학과)
  • Received : 2011.05.16
  • Accepted : 2011.10.04
  • Published : 2011.12.01
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Abstract

This research concerns the development of a compression/absorption high-temperature hybrid heat pump that uses a natural refrigerant mixture. Heat pumps based on the compression/absorption cycle offer various advantages over conventional heat pumps based on the vapor compression cycle, such as large temperature glide, temperature lift, flexible operating range, and capacity control. In this study, a lab-scale prototype hybrid heat pump was constructed with a two-stage compressor, absorber, desorber, desuperheater, solution heat exchanger, solution pump, liquid/vapor separator, and rectifier as the main components. The hybrid heat pump system operated at 10-kW-class heating capacity producing hot water whose temperature was more than $90^{\circ}C$ when the heat source and sink temperatures were $50^{\circ}C$. Experiments with various $NH_3/H_2O$ mass fractions and compressor/pump circulation ratios were performed on the system. From the study, the system performance was optimized at a specific $NH_3$ concentration.

본 연구에서는 천연냉매를 적용한 압축/흡수식 하이브리드 고온제조 히트펌프를 실험적으로 연구한 결과를 제시하였다. 압축/흡수식 히트펌프는 기존의 증기압축 히트펌프에 비해 고온영역을 포함한 넓은 생산온도범위, 높은 승온기능, 다양한 용량 제어방법 등 여러가지 장점을 가지고 있다. 제작된 하이브리드 히트펌프는 현재 실제 산업현장에 적용하기 이전의 초기 시제품 단계로 실험실에 설치하여 운전하였으며, 주요 구성부품으로는 이단압축기, 흡수기, 재생기, 과열냉각기, 용액 열교환기, 용액펌프, 기액분리기/정류기 등이다. 성능실험에서 $50^{\circ}C$의 열원을 고온 및 저온열원으로 사용한 결과 $90^{\circ}C$ 이상의 고온수 토출과 10 kW급의 난방 용량을 얻을 수 있었다. 혼합냉매의 성분비 변화에 따른 압축기/펌프 유량의 순환비 변화 및 다양한 성능변화를 실험적으로 관찰하였으며, 시스템의 효율과 용량에 있어 최적 성분비가 존재함을 확인하였다.

Keywords

References

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