Thermal calculation of ground contact structures: Correction factors of environment- and structure-dependent effects on the heat transfer coefficient

Abstract

The heat loss at ground contact structures is taken into consideration in building heat loss calculations. However, the heat loss through the ground depends not only the soil and the building structure, but the environment as well. New calculation methods based on parametrized transient finite element thermal modelling are introduced in the preceding research article [3]. This paper is the further demonstration of the methods’ environment- or structure-depending correction factors which describe the effect of changing climatic conditions, soil composition or the change of the floor’s structure. These corrections are investigated by using finite element computer modeling tools. A comparative analysis of the initial results and the results corrected according to the different environmental- or structural conditions are represented, showing the impacts of the variable circumstances. The study also deals with the three-dimensional thermal effects from the geometric of the building, providing shape correction multiplying factors to the basic building forms of ground contact structures.

Keywords

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(IJCESEN)

Abstract

References

1. Ansys 14 User’s Manual
2. EN ISO 13370:2007 - Thermal performance of buildings - Heat transfer via the ground - Calculation methods (ISO 13370:2007)
3. EN ISO 10456:2007 - Building materials and products - Hygrothermal properties - Tabulated design values and procedures for determining declared and design thermal values (ISO 10456:2007)
4. Latta J.K., Boileau G.G., Heat losses from house basements. Canadian Builders 19, issue 10, (1969) 39-42.
5. Nagy, B., Thermal calculation of ground contact structures: New methods based on parametrized transient finite element thermal modeling, Acta Physica Polonica A, vol. 128, (2015)