Korean Journal of Air-Conditioning and Refrigeration Engineering (설비공학논문집)

The Society of Air-Conditioning and Refrigerating Engineers of Korea (대한설비공학회)
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Experimental Study on Performance Evaluation of System A/C using PWM or Inverter Method (Heating Characteristics at Low Temperature Conditions)

PWM 방식과 인버터 방식을 사용한 시스템 에어컨의 성능평가에 대한 실험적 연구(난방저온 특성)

  • 김대훈 (선문대학교 기계공학과) ;
  • 전용호 (선문대학교 기계공학과) ;
  • 권영철 (선문대학교 기계공학과) ;
  • 이윤수 (센추리 기술연구소) ;
  • 문제명 (삼성전자 시스템가전사업부) ;
  • 홍주태 (삼성전자 시스템가전사업부)
  • Published : 2003.07.01
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Abstract

The present study concerns an experiment on the heating characteristics of a system air-conditioner (A/C) using PWM method or inverter method at low temperature con-ditions. The compressors used are digital scroll type and BLDC inverter type. Under the low outside temperature condition, -5$^{\circ}C$, -1$0^{\circ}C$, -15$^{\circ}C$, heating capacities and COPs are mea-sured by the psychometric calorimeter using air enthalpy method. Also, outlet air temperatures at heating operation mode are measured at -5$^{\circ}C$, -1$0^{\circ}C$ and -15$^{\circ}C$. Experimental results show that COPs of the system A/C using a PWM method are more effective than those of the inverter method at heating operation mode. Although the heater is on, COPs of PWM method are similar to those of BLDC inverter method. Moreover, the heating capacities of PWM method at -5$^{\circ}C$, -1$0^{\circ}C$ and -15$^{\circ}C$ are larger about 10~20% and outlet air tempe-rature at -15$^{\circ}C$ is larger about 10%, compared to the inverter method.

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References

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