태양열집열기를 이용한 원수열원 히트펌프의 성능 개선

다국어 초록 (Multilingual Abstract)

In this study, solar-assisted raw-water source heat pumps(SA–RWSHPs) are investigated to prevent performance degradation owing to low water source temperature during the heating season. Solar collectors in the SA–RWSHPs are used to increase the heat source temperature in winter. The water source temperature and performance of the SA–RWSHP are analyzed according to flow rate of water source, solar sources and source side of heat pumps in detail. Furthermore, the unit and system COP of heat pumps are analyzed through the dynamic simulation. The raw-water source temperature and the unit COP of the SA–RWSHPs in winter were on average of 7.5℃ and approximately 24% higher, respectively, than those of the conventional RWSHPs. Additionally, the system COP of the SA-RWSHPs was approximately 21% higher than that of the RWSHPs owing to the solar collectors that were used to heat the domestic hot water, reducing the energy consumption of the auxiliary heater of hot water storage tank. The proposed SA–RWSHPs showed a good performance throughout the year, resulting in reducing the energy consumption of buildings.