Part-Load Performance Test of a Screw Chiller with Economizer using R22 and R407C

이코노마이저를 채용한 스크류 냉동기에서 R22와 R407C의 부분부하 성능실험

  • 장영수 (한국과학기술연구원 열유동제어연구센터) ;
  • 이용철 (한국과학기술연구원 열유동제어연구센터) ;
  • 김영일 (한국과학기술연구원 열유동제어연구센터)
  • Published : 2003.11.01


Screw compressor type chillers are widely used in refrigeration for capacity over 30 RT. In general, chillers operate under part-load conditions. Therefore, information on characteristics at part-load is very important in view of chiller performance and energy economy. In this study, performance tests of part-load and economizer system using R22 and R407C have been performed for various secondary fluid temperatures. Adoption of an economizer system increased the cooling capacity and improved COP except for lower part-load condition when injection volume ratio is 1.01. For the same cooling capacity condition at part-load, COP of both non-economizer and economizer system showed similar values.


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