超低温空气源热泵在沈阳地区供暖的应用研究

Reasearch on cryogenic application of air-source heat pump in Shenyang

空气源热泵在我国华东及华南等地区得到广泛应用,但在我国北方寒冷地区受室外温度的影响,存在制热量衰减、能效比降低等问题。为研究空气源热泵在北方寒冷地区的适用性,本文对空气源热泵在具有代表性的严寒地区沈阳进行冬季采暖的测试试验,结果表明,稳定运行的测试期内,室内平均温度为18.8℃,在极寒条件下(室外最冷温度-23℃)室内温度也能维持在18.5℃,均可以满足北方地区冬季采暖要求,测试期的制热性能系数COP为1.73,对比电加热采暖,节能率达到48%,节能效果比较明显。预估采暖季制热性能系数COP为1.98。

The air-source heat pump has been widely used in east China and South China,but in the cold region of north China,there are some problems such as heat generation attenuation and energy efficiency ratio reduction due to the influence of outdoor temperature.In order to study the applicability of the air-source heat pump in the cold region of north China,this paper carries out the winter heating test of the air-source heat pump in the representative cold region of Shenyang.The results show that during the test period of stable operation,the average indoor temperature was 18.8℃,and the indoor temperature could be maintained at 18.5℃in extremely cold conditions(the coldest outdoor temperature was-23℃),both of which could meet the requirements of office heating in northern regions in winter.The COP of heating performance during the test period was 1.73.Compared with electric heating,the energy saving rate reached 48%,The effect of energy saving is obvious.COP of heating performance in heating season is estimated to be 1.98.