Influence Analysis of Groundwater Seepage on Energy Conservation of Ground Source Heat Pump

Based on the database of typical weather condition in northern cold region of China, this paper analyzes cold and hot load characteristics of hotel buildings. Underground heat exchanger pipe group model of ground source heat pump (GSHP) based on limited length line heat source model is established. As a monthly time step to change heat flux, the continuity change of soil temperature field around the tube is studied, and a conclusion that there is no energy conservation because of its long-term accumulation of the cold soil conditions is obtained. On the above basis, line source model is modified with the impact of water seepage based on the moving heat source theory. We compare changes in soil temperature field when there is groundwater seepage in soil drilling area, get the conclusion that groundwater seepage help to ease the situation of soil hot and cold accumulation, and make a positive contribution to energy conservation of GSHP.