| Title |
Performance of a Refrigerant Heating Type Heat Pump by Changing of Driving Devices and Heat Exchangers |
| Authors |
박윤철(Youn Cheol Park) ; 김상혁(Sang Hyuk Kim) ; 김지영(Ji-Young Kim) |
| Keywords |
열펌프 ; 냉매가열 ; 액체펌프 ; 냉매유량분배율 Heat pump ; Refrigerant heating ; Liquid pump ; Refrigerant distribution ratio |
| Abstract |
When the outdoor air temperature decreased less than the freezing temperature, frost forms at the surface of heat exchangers and it makes the performance degradation of a heat pump system. In this study, a heat pump system has been developed which has a refrigerant heating device as an auxiliarly heating equipment. To reduce power consumptions of the system, a liquid pump, rather than a compressor, was used to drive refrigerant in the heat pump cycle. Ratio of refrigerant mass flow between a refrigerant heating heat ex-changer(GHX) and a outdoor plate heat exchanger(PHX) was varied and the system per-formance was measured and analyzed. As results, when the refrigerant flow rate to the GHX was decreased, the system performance is decreased due to heat absorption capability restric-tion of the GHX and small variation of the power consumption in the compressor. The effect on the evaporating and condensing pressure by the distribution ratio of the refrigerant to the each heat exchanger is small compare to the effect by the frequency change in the com-pressor. When the compressor was replaced by the liquid pump, the capacity of the system decreased a little, however the power consumption decrease approximately 80% compare with the power used in the compressor. |