三维数值模型及其在地源热泵岩土热物性计算中的应用  

3-D numerical model and its application in calculation of parameter of rock-soil thermal properties in ground source heat pump

作　　者：余伟之[1] 胡平放[1] 雷飞[1] 邬田华[1] 孙启明[1] 罗苏瑜 

机构地区：[1]华中科技大学 [2]珠海格力电器股份有限公司

出　　处：《制冷与空调》2013年第9期107-112,共6页Refrigeration and Air-Conditioning

基　　金：国家自然科学基金(51078160)

摘　　要：利用有限体积法,在Matlab平台上建立三维数值模型,通过经典线热源模型对该模型进行验证,并介绍工程应用。该模型能够反映实际钻孔参数,适应U形埋管内流量波动、加热功率较大波动等情况。结合实际测试数据,应用该模型可反演得到地源热泵岩土热物性参数。且该模型能够克服经典线热源模型忽略钻孔内容积比热容的局限性,更好地反映实际地源热泵岩土热响应情况。A three-dimensional numerical model using the finite volume method in Mat- lab platform is built. It is verified via typical thread thermal source model, and engineering application is introduced as well. It can accurately reflect the actual drilling parameters, and is good to use in the condition with flow rate change in the U pipe and greater heating power volatility. Combined with the actual test data, under allowed error range, the param- eter of the rock-soil thermal properties can he calculated inversely. The model is validated by line source model. The model overcomes the shortage of typical thread thermal source model in neglecting the volumetric heat capacity in borehole and can better reflect the rock-soil＇s thermal response.

关 键 词：三维数值模型 岩土热物性参数 地下水渗流 岩土热响应测试 

分 类 号：TU831[建筑科学—供热、供燃气、通风及空调工程]