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为给地源热泵系统工程提供科学合理的设计依据,本文选取实际场地开展了地下水流速测量及换热测试,研究不同地下水流速对地埋管换热能力的影响。实测数据结果表明:地下水流动可增强地埋管换热能力,减轻能量累积效应;地下水流速增加时,位于上游区域、受地下水流影响的埋管有效长度较大的测试孔,其换热能力增加量优于位于下游、埋管有效长度较小的测试孔;地下水位较高的区域,有利于地埋管换热。试验结果对地埋管换热器的设计具有指导意义。
In order to provide scientific and reasonable design basis for ground source heat pump system engineering, this paper selects the actual site to carry out groundwater flow measurement and heat transfer test to study the influence of different groundwater flow rate on heat exchange capacity of buried pipe. The measured data show that groundwater flow can enhance the heat exchange capacity and reduce the energy accumulation effect. When the groundwater velocity increases, the test holes with larger effective length in the upstream region and under the influence of groundwater flow increase the heat transfer capacity The quantity is superior to the test hole located in the lower reaches with a smaller effective length of the buried pipe. The higher groundwater level is conducive to the heat exchange of the buried pipe. The result of the test is instructive to the design of ground heat exchanger.