空气源热泵8℃供暖能耗分析
摘要：集中供暖一般在日平均温度低于5℃时进行，但随着人们对热舒适的更高追求，逐渐出现了8℃供暖的呼声，多地也实质上进行了提前供暖。近几年，空气源热泵供暖系统的发展为部分用户个性化供暖提供了条件。为探究空气源热泵8℃供暖模式的能耗增幅，结合气象参数建立和验证了5℃供暖模式单位设计热负荷耗电量计算模型和8℃供暖模式耗电量增幅计算模型。结果表明：5℃供暖模式空气源热泵机组耗电量主要受供暖室外平均温度、平均相对湿度和供暖期时长的影响；8℃供暖模式的能耗增幅则主要取决于供暖季增加天数内的室外平均温度和供暖季增加天数，几乎不受相对湿度的影响，当供暖增加天数百分率在20%以下时，耗电量增加百分率比供暖增加天数百分率低6%～11%,而当供暖增加天数百分率为20%～30%时，空气源热泵耗电量增加百分率为12%～20%,对空气源热泵系统的运行经济性产生明显影响。
关键词：空气源热泵8℃供暖5℃供暖耗电量室外平均温度供暖期时长能耗增幅
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Energy consumption analysis of air-source heat pump heating at 8℃
Abstract: Central heating is generally carried out when the average daily temperature is lower than 5 ℃, but with people's higher pursuit of thermal comfort, the call for heating at 8 ℃ has gradually appeared, and many places have essentially carried out advance heating. In recent years, the development of air-source heat pump heating systems has provided conditions for personalized heating for some users. In order to explore the energy consumption increment in 8 ℃ heating mode of air-source heat pumps, combined with meteorological parameters, the calculation model of power consumption per unit design heating load in 5 ℃ heating mode and the calculation model of power consumption increase in 8 ℃ heating mode are established and verified. The results show that the power consumption of the air-source heat pump unit in 5 ℃ heating mode is mainly affected by the outdoor average temperature, average relative humidity and heating period. The energy consumption increment in 8 ℃ heating mode mainly depends on the outdoor average temperature in the additional days and the number of additional days in the heating season, and is almost not affected by relative humidity. When the percentage of heating increase days is less than 20%, the percentage in power consumption increase is generally lower than that of heating increase days by 6% to 11%. When the percentage of heating increase days is between 20% and 30%, the percentage of power consumption increase of the air-source heat pump is between 12% and 20%, which has a significant impact on the operating economy of the air-source heat pump system.
Keywords: air-source heat pump; heating at 8 ℃; heating at 5 ℃; power consumption; outdoor average temperature; heating period; energy consumption increment;
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