Field determination of shallow soil thermal conductivity using a short-duration needle probe test
Field determination of shallow soil thermal conductivity using a short-duration needle probe test
复制标题
使用短时针探针测试现场测定浅层土壤导热系数
DOI：
10.1144/qjegh2012-002
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发表时间：
2012
期刊：
影响因子：
--
通讯作者：
J. Findlay
中科院分区：
文献类型：
--
作者：
W. King;D. Banks;J. Findlay
The thermal conductivity of shallow subsoil, one of the important input parameters in the design of a horizontal closed-loop ground heat exchange system, can be derived by means of a thermal needle probe survey. The probe is mounted on a 1.5 m handle, allowing short-duration (10 min) thermal response tests to be carried out at various locations and depths within a land area designated for such a heat exchanger. At two study sites in Central England, a minimum of 12–16 such determinations were required to obtain a stable estimate of bulk thermal conductivity (based on the geometric mean of single measurements), although one cannot necessarily assume that this minimum requirement would be generally valid at all sites. At the two sites, the method proved relatively rapid and able to deliver a value of geometric mean thermal conductivity with a typical uncertainty of the order of 15%.
