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对地铁热负荷产生的原因和规律进行分析并计算出其冬季可回收的废热量。根据地铁废热的生成特点,利用试验台进行模拟试验,确定出系统的最佳结合方式和运行控制模式。模拟试验结果表明:当地铁排热量能够满足建筑的供暖需求时,单独运行空气源热泵进行供暖,热泵的平均COP为4.91;当地铁没有废热可供利用时,单独运行土壤源热泵对建筑进行供暖,此时热泵的平均COP为3.82;在整个供暖期间,地铁废热-土壤源混合式热泵系统的平均COP为3.31。
The causes and rules of the subway thermal load are analyzed and the amount of waste heat that can be recovered in winter is calculated. According to the characteristics of the generation of subway waste heat, the test bench is used to carry out the simulation test to determine the optimal combination mode and operation control mode of the system. The simulation results show that when the heat emission of the local iron can meet the heating demand of the building, the air source heat pump is operated separately to heat the building. The average COP of the heat pump is 4.91. When the underground iron is not available for waste heat, the ground source heat pump , At which time the average COP of the heat pump was 3.82; during the entire heating period, the average COP of the waste heat-to-ground source hybrid heat pump system was 3.31.