To address the winter heating problem in the agricultural and pastoral areas of Qinghai Province,this study focuses on the thermal performance of ultra-low-temperature air source heat pumps operating in the region.Four local residential houses were selected as pilot sites for the application of air source heat pump heating technology.Through on-site simulation tests,the actual operational performance under different operating scenarios was analyzed,along with the impact of environmental temperature and outlet water temperature on the system's heating coefficient of performance(COP)and heating capacity.The test results indicate that the highest heating COP,reaching 2.51,is achieved when adopting the heating mode of a secondary system with dual air ducts and radiators for households.During the heating period,the indoor average temperature is maintained around 20℃,with fluctuations not exceeding 5℃,demonstrating stable heating performance.The system's COP and heating capacity gradually increase with the decrease in outlet water temperature and the increase in environmental temperature.When the outlet water temperature is 35℃,the system's COP always meets the minimum requirements.Moreover,when the heating capacity is constant,using a photovoltaic coupled air source heat pump system for heating reduces carbon emissions by 5.23 t compared to traditional coal-fired heating,proving the significant environmental benefits of the system and its potential for clean heating.
Ultra-low temperature air source heat pumpHeating coefficient of performancePhotovoltaic power generationCarbon emissionsEnvironmental benefits
NETL
NSTL
维普
万方数据
