An Experimental Study on the Part-Load Performance of a River Water Source 2-Stage Heat Pump

하천수 열원 2단 압축 열펌프시스템의 부분부하 운전특성에 관한 실험적 연구

  • 김지영 (한국에너지기술연구원 재생에너지연구부 미활용에너지. 지열연구센터) ;
  • 백영진 (한국에너지기술연구원 재생에너지연구부 미활용에너지. 지열연구센터) ;
  • 이영수 (한국에너지술연구원 재생에너지연구부) ;
  • 나호상 (한국에너지기술연구원 재생에너지연구부 미활용에너지. 지열연구센터)
  • Published : 2007.05.30


The river water heat source heat pump has the advantage in the performance compared to air source heat pump. Although its better performance, the large temperature difference between load and source makes system performance worse by nature. In this study, 2-stage compression is considered as the solution of this problem. Generally, heat pump is designed for maximum capacity rate, but it actually operates at part load condition in many cases. Therefore, an information on the part-load character is very important in view of the system overall performance. In this study, part-load performance tests of a R134a 2-stage compression heat pump were carried out over the river water and supply heating water temperature changes. The experimental results show that the system performance is influenced by the part load rates, river water temperature, load temperature, etc.