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An Experimental Stuff on the Performance of Multi-type Heat Pump using Capillary Tubes  

권영철 (선문대학교 기계공학과)
장근선 (선문대학교 기계공학과)
이윤수 (선문대학교 대학원)
김대훈 (선문대학교 대학원)
전용호 (선문대학교 대학원)
이상재 (산업기술시험원 에너지설비팀)
Publication Information
Korean Journal of Air-Conditioning and Refrigeration Engineering / v.14, no.9, 2002 , pp. 749-755 More about this Journal
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 psy-chrometric 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.
Keywords
Mutli-type heat pump; Multi-type calorimeter; Rating test; Reliability test; Capillary tube;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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