| Title |
Experimental Study on Performance Evaluation of System A/C using PWM or Inverter Method : Heating Characteristics at Low Temperature Conditions |
| Authors |
김대훈 ; 전용호 ; 권영철 ; 이윤수 ; 문제명 ; 홍주태 |
| Keywords |
System A/C ; 시스템 에어컨 ; PWM ; 펄스폭 변조 ; Scroll compressor ; 스크롤 압축기 ; BLDC inverter ; BLDC 인버터 ; Heating and low temperature ; 난방저 |
| 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 conditions. The compressors used are digital scroll type and BLDC inverter type. Under the low outside temperature condition, －5℃, －10℃, －15℃, heating capacities and COPs are measured by the psychometric calorimeter using air enthalpy method. Also, outlet air temperatures at heating operation mode are measured at －5℃, －10℃ and －15℃. 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℃, －10℃ and －15℃ are larger about 10～20% and outlet air temperature at －15℃ is larger about 10%, compared to the inverter method. |