地下土壤导热系数确定中影响因素分析  

ANALYSIS OF INFLUENCE FACTORS ON DETERMINING THE GROUND THERMAL CONDUCTIVITY

作　　者：高青[1] 余传辉[1] 马纯强[1] 于鸣[1] 玄哲浩[1] 

机构地区：[1]吉林大学热能工程系,长春130022

出　　处：《太阳能学报》2008年第5期581-585,共5页Acta Energiae Solaris Sinica

基　　金：国家自然科学基金(NO.50576030)

摘　　要：利用有限元热分析平台,建立了二维瞬态有限元模型,计算确定了竖孔U型管地下换热器周边的土壤导热系数,并着重对主要影响参数进行了比较分析。讨论了测量时间、土壤初始温度、土壤体积比热、回填料物性参数和管间距等因素对土壤导热系数的影响程度和敏感性。A two-dimensional numerical heat transfer model for the vertical U ground heat exchanger was developed on the basis of a commercial software with the finite element thermal analysis, and estimated the thermal conductivity of the soil around the borehole. Furthermore, the sensitivity of the results to some different parameters was analyzed, such as, the length of test time, the soil initial temperature, the soil volumetric specific heat, the grout thermal properties and the shank space, etc.

关 键 词：地下换热器 土壤导热系数 影响因素 

分 类 号：TK521.2[动力工程及工程热物理—热能工程]