寒冷地区空气源热泵耦合太阳能集热器系统供暖季运行能效评价

Evaluation on the Operational Efficiency of Coupled Heating System of Air Source Heat Pumps Coupled with Solar Collectors in Cold Areas during the Heating Season

近年来寒冷地区空气源热泵热水器使用逐渐增多,多能联合分户供暖系统陆续出现。目前热泵热水器产品的能效采用瞬时COP表示,寒冷地区供暖季环境温度波动较大,空气源热泵系统在变工况下运行时难以用瞬时COP来表示其实际的运行能效。试验以空气源热泵与太阳能集热器耦合系统为测试平台,分别测试分析空气源热泵热水器单独供暖和空气源热泵耦合太阳能集热器系统在寒冷地区供暖工况下的制热情况。结合整个供暖季气象数据和建筑供暖负荷,计算得出供暖工况下单空气源热泵热水器运行季节能效系数SPFh为2.48,空气源热泵耦合太阳能集热器运行季节能效系数SPFs为2.70,太阳能集热器使系统供暖季节运行能效提高了8.9%。

In recent years,more and more household heating systems have been appeared with an increasing number of air source heat pump water heaters in North China. Now,the energy efficiency of heat pump water heater products sold in the market is indicated by Instantaneous COP which,however,has some limitations,for the outdoor ambient temperature fluctuates in the entire heating season. It is difficult for the air source heat pump system operating under variable conditions to use Instantaneous COP to represent the actual operational efficiency.An air source heat pump is coupled with a solar collector to test the platform which is utilized to analyze the single air source heat pump water heater and the air source heat pump coupled solar collector system respectively under heating conditions. Combined with the weather data in the whole heating season and the heating load of buildings,the efficiency coefficient SPFhof the single air source heat pump water heater under heating conditions is calculated to be 2. 48 and the air source heat pump coupling solar energy efficiency coefficient SPFs is 2. 70. Thus,the solar energy collector improves the energy efficiency of the system by 8. 9% in heating season.