Correlation on Compressor Discharge Temperature of System A/C Applying PWM Scroll Compressor in Cooling Mode

PWM 스크롤압축기를 적용한 시스템 에어컨의 냉방운전 시 압축기 토출온도에 대한 상관식 개발

  • Kwon, Young-Chul (Division of Mechanical Engineering, Sunmoon University) ;
  • Park, Sam-Jin (Division of Mechanical Engineering, Sunmoon University) ;
  • Ko, Kuk-Won (Department of Control and Measurement Engineering, Sunmoon University) ;
  • Park, Byung-Kwon (Graduate School, Sunmoon University) ;
  • Kim, Dae-Hun (Energy Evaluation Team, Korea Testing Laboratory) ;
  • Youn, Baek (System Appliances Division, Samsung Electronics)
  • Published : 2006.09.30

Abstract

An experimental study has been performed to investigate the correlation on compressor discharge temperature of capacity modulated system A/C in cooling mode. Indoor and outdoor temperatures, the cooling capacity, compressor discharge temperature and loading time are measured by the psychrometric calorimeter. The system is controlled by applying the scroll compressor operated by PWM valve and loading duty. With decreasing outdoor temperature, the cooling capacity increases. But, with decreasing indoor temperature, it decreases. According to the increase in outdoor temperature and loading duty, compressor discharge temperature increases. From these experimental data, the correlation on compressor discharge temperature is proposed. The correlation obtained from the present study is agreed with the experimental data within $3^{\circ}C$.

본 연구는 PWM 방식의 스크롤 압축기를 적용한 에어컨 시스템의 압축기 운전주기, 실내 온도, 그리고 실외온도를 변화시키면서 시스템 에어컨의 최적효율을 나타내는 압축기 토출온도 상관식을 도출하고자 실험연구를 수행하였다. 실험은 실내 및 실외 온도변화에 따른 시스템의 성능 및 압축기 토출온도를 측정 하고자 다양한 온도를 설정하였다. 압축기 토출온도는 로딩듀티와 실외온도가 증가함에 따라 선형적으로 증가하였다. 로딩듀티(loading duty)와 실외온도 변화에 따른 압축기 토출온도는 실내온도 변화보다 실외온도의 변화에 더 크게 변화하였다. 압축기 토출온도 상관식은 실외온도, 실내온도, 그리고 로딩듀티의 함수로 표현되었으며, 실험으로부터 획득된 압축기 토출온도와 최대 $3^{\circ}C$ 이내에서 만족함을 확인하였다.

Keywords

References

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