A novel tool for the prediction of earth-contact heat transfer: A multi-room simulation

Abstract

This paper reports a new simulation method for the prediction of earth-contact heat transfer. The new method claims to be fast, accurate and flexible by means of incorporating elements of the response factor method into a numerical method based on the finite volume technique. More specifically, the development of the method is presented and implemented for a general multi-room structure. Work undertaken so far shows that the current combination of the finite volume and response factor techniques is at its most useful when the new tool is used in a parametric analysis process. Initially, a ‘pre-processing’ procedure is utilized to generate a certain number of simulated hours for use as a time series by the response factor technique in the second stage of the method. Assuming that the earth-contact parameters then remain constant, every subsequent simulation in which the non-earth-contact parameters are varied can incorporate the earth-contact heat transfer efficiently, by the use of the response factor technique, which takes a few seconds. Very good agreement has been achieved between a three-dimensional finite volume model and the present method, for a typical multi-room slab-on-ground floor, coupled with dramatically improved run times which is essential for the rapid parametric analysis of a structure.

Keywords

modelling heat transfer buildings earth contact

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References

Claridge

D. E.

Design Methods for Earth-Contact Heat Transfer in Advances in Solar Energy (Ed. Boer

), 1987 (American Solar Energy Society, Boulder, Colorado).

Davies

Tindale

Littler

Importance of multidimensional conductive heat flows in and around buildings. Bldg Serv. Engng Res. Technol., 1995, 16(2), 83–90.

Adjali

M. H.

Davies

Littler

Earth-contact heat flows: Review and application of design guidance predictions. Bldg Serv. Engng Res. Technol., 1998, 19(3), 111–121.

Davies

Zoras

Adjali

M. H.

The development and inter-model comparative testing of a novel earth-contact heat-transfer simulation method. Bldg Serv. Engng Res. Technol., 2000, 21(1), 21–29.

Davies

Zoras

Adjali

M. H.

A potentially fast, flexible and accurate earth-contact heat transfer simulation method. In Building Simulation ′99, Sixth International IBPSA Conference, Kyoto, Japan, 1999, pp. 605–611.

ASHRAE Fundamentals, 1997 (American Society of Heating Refrigerating and Air Conditioning, New York).

Patankar

Numerical Heat Transfer and Fluid Flow, 1980 (Hemisphere, New York).

Davies

Computational and experimental three-dimensional conductive heat flows in and around buildings. PhD thesis, University of Westminster, London, 1994.

Adjali

M. H.

Davies

Rees

S. W.

Littler

Temperatures in and under a slab-on-ground floor: Two-and three-dimensional numerical simulations and comparison with experimental data. Bldg Environment, 2000, 35, 655–662.

10.

Davies

M. G.

Room heat needs in relation to comfort temperatures: Simplified calculation methods. Bldg Serv. Engng Res. Technol., 1990, 11(4), 123–139.

11.

Adjali

M. H.

Davies

Littler

Three-dimensional earth-contact heat flows: A comparison of simulated and measured data for a buried structure. Renewable Energy, 1998, 15(1–4), 356–359.

12.

Adjali

M. H.

Davies

Littler

A numerical simulation of measured transient temperatures in the walls, floor and surrounding soil of a buried structure. Int. J. Numer. Meth. Heat Fluid Flow, 1999, 9, 405–422.

13.

Harkness

E. L.

Mehta

M. L.

Solar Radiation Control in Buildings, 1978, Ch. 4 (Applied Science, London).

14.

Davies

Zoras

Adjali

M. H.

Improving the efficiency of the numerical modeling of built environment earth-contact heat transfer. Appl. Energy, 2001, 68, 31–42.