Study on Heat Transfer Performance of Energy Diaphragm Wall Considering Underground Seepage
The energy diaphragm wall is a new type of underground energy structure that combines the dual functions of structural bearing and heat exchange. Underground seepage significantly impacts the heat transfer performance of energy structures,necessitating in-depth research. Taking the energy dia-phragm wall of the Shanghai Natural History Museum as the engineering background,a numerical model was established using COMSOL multi-physical field coupling software to analyze the influence of the heat exchange tube inlet temperature,groundwater seepage direction,seepage velocity,heat exchange operation mode,and operation period on the heat exchange of the underground diaphragm wall structure. The results showed that both the velocity and direction of underground seepage signifi-cantly affected the heat transfer of the energy structures. Underground seepage could effectively allevi-ate the heat accumulation caused by heat exchange in underground structures,ensuring the heat ex-change efficiency of energy structures. Therefore,energy underground structures are suitable for geo-logical environments with good seepage conditions. Intermittent operation of ground source heat pumps can help restore the heat in the soil mass. Under long-term operation conditions,the heat ex-change in energy structures is higher in summer than in winter. The research results provide a certain reference for improving the design theory of energy underground diaphragm walls and contribute to the development and utilization of shallow geothermal energy.
energy diaphragm wallground source heat pumpCOMSOLseepageheat exchange capacity
万方数据
维普
