Heat Transfer Research Of GSHP Tubes Considering Groundwater Seepage

Ground source heat pump technology is a kind of technology which uses soil’s goodheat accumulation characteristics to provide cold and heat quantity to buildings.It usesclosed circulating water to make cold and heat exchange as the cold and heat sources ofbuilding’s air conditioning so as to meet the requirement of indoor environment.First of all,this paper elaborates the principle and effect of ground source heatpump,then studys the thermal performance test of soil,and makes numerical simulationresearch by using a numerical analysis software called FLUENT.It studys soil’s heatconductivity,backfill material’s heat conductivity,tube’s heat conductivity,inlet velocityof circulation fluid as the effect factors when there is no water seepage.It studys soil’sheat conductivity,soil’s density,soil’s porosity,and the horizontal seepage velocity of thegroundwater,the vertical seepage velocity of the surface water,the vertical&horizontalvelocity coaction as the effect factors when there is water seepage.The research draws some conclusions.First,soil’s heat conductivity is proportionalto the average quantity of heat per meter when there is no seepage.When there isseepage,soil’s density and porosity has little influence on heat exchanger,vertical andhorizontal seepage velocity has great influence on heat exchanger.When arranging heatexchange tubes,the angle of heat exchange tubes and seepage direction should be45°soas to achieve the best heat transfer effect.These conclusions are beneficial.