| Title |
Heating Performance Evaluation of the VRF Heat Pump System with Refrigerant Heating Cycle for the Extreme Cold Region |
| Authors |
이상헌(Sanghun Lee) ; 최송(Song Choi) ; 김병순(Byengsoon Kim) ; 이재근(Jaekeun Lee) ; 이광호(Kangho Lee) |
| Keywords |
냉매유량가변 ; 냉매 가열 ; 빌딩 멀티 ; 냉매 R410A ; BLDC 인버터 ; 버너 ; 열원 Variable Refrigerant Flow(VRF) ; Refrigerant heating ; Building Multi ; R410A ; BLDC Inverter ; Burner ; Heat source |
| Abstract |
Heat pump systems for commercial building with variable refrigerant flow(VRF) are expanding a market due to high energy efficiency, lower maintenance cost and easy installation comparing with the conventional heat pump with the constant refrigerant flow. In general, heat pump systems degrade the energy efficiency in the extremely low temperature regions. In this study, VRF heat pump system with refrigerant heating is experimentally investigated to overcome the low heating performance in the extremely low temperature regions. VRF heat pump system with refrigerant heating is found out the sufficient heating performance in the -25 degree temperature condition comparing with the conventional heat pump system and is obtained more than 2,500 kPa high pressure in the evaporator at low temperature. |