Transient Performance of a System Heat Pump with the Variation of Compressor Speed and EEV Openings

시스템 히트펌프의 압축기 주파수 및 전자팽창밸브 개도 변화에 따른 과도성능 특성

  • Lee, Sang-Hyeok (Department of Railway Vehicle System Engineering, Woosong College) ;
  • Choi, Jong Min (Department of Mechanical Engineering, Hanbat National University)
  • 이상혁 (우송정보대학 철도차량운전과) ;
  • 최종민 (한밭대학교 기계공학과)
  • Received : 2013.07.05
  • Accepted : 2013.08.02
  • Published : 2013.09.01


Small and medium-size buildings employ a multi-distributed individual air-conditioning system utilizing package air conditioners instead of centralized cooling systems, which can allow easier building management and maintenance along with a diversification of facility use. Inverter driven system heat pumps have been developed to achieve not only easy distribution control allowing free combination of indoor units with different models and different capacities, but also wide applications to an intelligent air conditioning. In this study, the transient performance of a system heat pump was analysed with the variation of compressor speed and EEV openings. The superheat was selected as a control parameter of the system, because the variation of it was consistent with each indoor unit capacity.


System heat pump;Compressor speed;Superheat;Transient performance


Supported by : 국토교통과학기술진흥원


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