兰州新区地源热泵岩土热物性现场热响应试验研究

Study on the Rock and Soil Thermal Physical Property Test of Ground Source Heat Pump System in Lanzhou New Area

针对兰州新区某一写字楼地源热泵工程,为了得到现场岩土热物性,进行现场热响应试验测试。通过研究传热模型及热物性计算方法,对试验数据进行科学处理,获得工程所在地土壤原始平均温度、土壤综合导热系数、容积比热容、钻孔综合热阻。经过查证本建筑场地《岩土工程勘察报告》中的土壤密度、含水率及孔隙率,分析对比认为试验数据是可靠的,计算的岩土热物性数据可用于地源热泵工程设计的基础参数。

For a ground source heat pump engineering on a certain office building in new district of Lanzhou,in order to get the geotechnical thermal physical properties,we have a thermal response test on site.Through the research of heat transfer model and calculation method,then process the test data used a reasonable method,get the initial average soil temperature,soil comprehensive coefficient of thermal conductivity and volumetric heat capacity,borehole comprehensive thermal resistance of the engineering area.After verified the report of geotechnical engineering investigation in local construction area,get the soil density,moisture content and porosity,compared and analyzed with the test data considered the data is reliable,the calculation of geotechnical data in thermal and physical properties can be used as based parameters for ground source heat pump engineering design.