Ground-heat transfer is tightly coupled with soil-moisture transfer. The coupling is threefold: heat is transferred by thermal conduction and by moisture transfer; the thermal properties of soil are strong functions of the moisture content; and moisture phase change includes latent heat effects and changes in thermal and hydraulic properties. A heat and moisture transfer model was developed to study the ground-coupled heat and moisture transfer from buildings. The model also includes detailed considerations of the atmospheric boundary conditions, including precipitation. Solutions for the soil temperature distribution are obtained using a finite element procedure. The model compared well with the seasonal variation of measured ground temperatures.
Issue Section:
Technical Papers
1.
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2.
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,” ASHRAE Trans.
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.3.
Wang, F.S., 1979, “Mathematical Modeling and Computer Simulation of Insulation Systems in Below Grade Applications,” Proc. ASHRAE/DOE-ORNL Conf., Thermal Performance of the Exterior Envelopes of Buildings, Kissimmee, FL.
4.
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5.
Bahnfleth, W.P., 1989, Three-Dimensional Modeling of Heat Transfer From Slab Floors, National Technical Information Service, Springfield, VA, ADA210826.
6.
Shen, L.S., 1986, “An Investigation of Transient, Two-Dimensional Coupled Heat and Moisture Flow in Soils,” Ph.D. Thesis, University of Minnesota, Minneapolis, MN.
7.
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9.
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12.
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13.
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,” Trans., Am. Geophys. Union
, 38
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), pp. 222
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,” Soil Sci.
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), pp. 184
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, and Anderson
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,” Hilgardia
, 15
, pp. 31
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.16.
Jury, W. A., 1973, Simultaneous Transport of Heat and Moisture Through a Medium Sand, Ph.D. Thesis, University of Wisconsin, Madison, WI.
17.
Martin
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20.
Zienkiewicz, O. C., and Taylor, R. L., 1994, The Finite Element Method, Fourth Edition, McGraw-Hill, London.
21.
Milly
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.22.
Celia
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, and Zarba
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,” Water Resour. Res.
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.23.
Philip
, J. R.
, 1957
, “The Theory of Infiltration: 1. The Infiltration Equation and Its Solution
,” Soil Sci.
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.24.
Hampton, D., 1989, Coupled Heat and Fluid Flow in Saturated-Unsaturated Compressible Porous Media, PhD Dissertation, Colorado State University, Fort Collins, CO.
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