| Title |
An Experimental Study on the Performance of Multi-type Heat Pump using Capillary Tubes |
| Authors |
권영철 ; 장근선 ; 이윤수 ; 김대훈 ; 전용호 ; 이상재 |
| Keywords |
Mutli-type heat pump ; 멀티형 열펌프 ; Multi-type calorimeter ; 멀티형 칼로리미터 ; Rating test ; 정격시험 ; Reliability test ; 신뢰도시험 ; Capillary tube ; 모세관 |
| Abstract |
In order to develop a multi-type heat pump system with two indoor units of non-uniform capacities, the optimum refrigerant circuit was developed using capillary tubes. The refrigerant circuit was composed of four main parts; a heating circuit, a cooling circuit, a by-pass circuit and a balance circuit. The system characteristics of multi-type heat pump was investigated through the rating test and the reliability test, using the multi-type psychrometric calorimeter. The results of the rating test showed that the capacity of the multi- type heat pump was about 93% of the design value. In particular, the capacity of cooling single mode was about 13% higher than the design value, and the capacity of heating multi mode was about 5% higher than the design value. The reliability of the multi-type heat pump was verified by various reliability tests(overload, extension tube, freeze up, under/over charging, sweat, flood back). The optimal amount of refrigerant charge and compressor capacity were determined from the present work. |