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RESEARCH PAPERS

Analytical Model to Predict Nonhomogeneous Soil Temperature Variation

[+] Author and Article Information
M. Krarti, J. F. Kreider

Joint Center for Energy Management, CEAE Department, University of Colorado, Boulder, CO 80309-0428

D. E. Claridge

Department of Mechanical Engineering, Texas A & M University, College Station, TX 77843-3123

J. Sol. Energy Eng 117(2), 100-107 (May 01, 1995) (8 pages) doi:10.1115/1.2870823 History: Received April 09, 1993; Revised August 15, 1994; Online February 14, 2008

Abstract

This paper presents an analytical model to predict the temperature variation within a multilayered soil. The soil surface temperature is assumed to have a sinusoidal time variation for both daily and annual time scales. The soil thermal properties in each layer are assumed to be uniform. The model is applied to two-layered, three-layered, and to nonhomogeneous soils. In case of two-layered soil, a detailed analysis of the thermal behavior of each layer is presented. It was found that as long as the order of magnitude of the thermal diffusivity of soil surface does not exceed three times that of deep soil; the soil temperature variation with depth can be predicted accurately by a simplified model that assumes that the soil has constant thermal properties.

Copyright © 1995 by The American Society of Mechanical Engineers
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