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Evaluation of Ground Temperature and Soil Thermal Diffusivity Using the Soil Temperature Data of KMA  

Sohn, Byong-Hu (Plant Research Division, Korea Institute of Construction Technology)
Publication Information
Journal of the Korean Society for Geothermal and Hydrothermal Energy / v.7, no.1, 2011 , pp. 1-9 More about this Journal
Abstract
Storing and transferring heat in soils is governed by the soil thermal properties and these properties are therefore needed in many engineering applications, including horizontal ground heat exchanger for ground-coupled heat pumps. This paper presents the evaluation results of the ground subsurface temperature and apparent thermal diffusivity of soils by using ground temperature data collected at the depths of 0.5 m, 1.0 m, 1.5 m, 3.0 m, and 5.0 m at four sites. The existing correlation assuming that the soil was homogeneous and of constant thermal diffusivity was applied to calculate the subsurface temperature and two analytical equations, amplitude and phase equation, were also used to evaluate the soil apparent thermal diffusivity. Comparison of the estimated and of the measured values of the subsurface temperature has shown that the empirical correlation predicts quite accurately the ground temperature at various depths. Based on the one-dimensional heat conduction equation, the apparent thermal diffusivity can be estimated by the two equations.
Keywords
Subsurface temperature; Ground surface temperature; Soil thermal diffusivity; Korea Meteorological Administration;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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