针对能源塔热泵系统低温工况下的性能下降问题，提出了一种相变能与能源塔耦合的热泵系统，模拟分析了该系统在几种典型气温下的COP及单日总能耗。结果表明：对于青岛地区400 kW的供热项目，当控制工况点为2.63 ℃时，能源塔热泵与相变能热泵的热负荷配比约为6∶5；随着典型气温升高，耦合系统较〖JP2〗单一能源塔热泵系统的日最低COP依次可提高0.81%，1.88%，3.19%和5.23%；耦合系统在日最高、最低气温为9.96 ℃，-1.73 ℃和3.68 ℃，-4.89 ℃时，其单日总能耗较能源塔热泵系统分别可减少137.06和195.19 kW〖DK〗•h。

Aiming at the problems of performance degradation of energy tower heat pump (ETHP) system under low temperature conditions, a heat pump system coupled with phase change energy and energy tower was proposed. The COP and total daily energy consumption of the system under several typical temperature conditions were simulated and analyzed. The result shows that for the 400 kW heating project in Qingdao, when the control operating point is 2.63 ℃, the heat load ratio of energy tower heat pump and phase change energy heat pump (PCHP) is about 6∶5. With the increase of typical temperature, the minimum daily COPs of the coupled system can be increased by 0.81, 1.88, 3.19 and 5.23% respectively compared with that of the single energy tower heat pump system. When the maximum and minimum daily temperatures of the coupled system are 9.96 , -1.73 and 3.68 , -4.89 ℃, the total daily energy consumption of the coupled system can be reduced by 137.06 and 195.19 kW•h respectively compared with that of the energy tower heat pump system.

TU831.6

青岛市民生科技计划项目“低品位能源供热供冷技术及应用示范”（19-6-1-79-NSH）