PL EN


Preferences help
enabled [disable] Abstract
Number of results
2015 | 128 | 2B | B-164-B-166
Article title

Thermal Calculation of Ground Contact Structures: New Methods Based on Parametrized Transient Finite Element Thermal Modeling

Authors
Content
Title variants
Languages of publication
EN
Abstracts
EN
The heat loss at ground contact structures is taken into consideration in building heat loss calculations. However, it implies uncertainties due to the physical properties of the soil as well as the building structure. In this paper, new methods are introduced for calculating the heat loss at ground contact structures. Firstly, it examines the presently used and general calculation methods and their shortcomings. Then a simple-to-use method based on thousands of results of parametrized transient finite element thermal models is shown. In this research, the calculations take the middle-eastern European climate conditions, geothermal gradient and soil properties as well as the relevant harmonized EU standards into account. The equivalent linear heat transfer coefficients, which in this method also contain the effects of thermal bridges, occurring in various conditions are summarized in a table and can be calculated by new formulae also shown in the paper using condition-dependent constants, the ground floor's heat transfer coefficient and the length between the floor and ground level.
Keywords
EN
Contributors
author
  • Budapest University of Technology and Economics, Faculty of Civil Engineering, Department of Construction Materials and Technologies, Budapest, Hungary
References
  • [1] T. Kusuda, P.R. Achenbach, ASHRAE Trans. 69, 439 (1963)
  • [2] S.W. Rees, Z. Zhou, H.R. Thomas, Build. Environm. 42, 1478 (2007), doi: 10.1016/S0360-1323(98)00001-8
  • [3] T. Blomberg, Ph.D. Thesis, Lund University, Sweden 1996
  • [4] J.K. Latta, G.G. Boileau, Canad. Build. 19, 39 (1969)
  • [5] A.E. Delsante, Build. Environm. 23, 11 (1988), doi: 10.1016/0360-1323(88)90012-1
  • [6] J. Claesson, C.E. Hagentoft, Build. Environm. 26, 195 (1991), doi: 10.1016/0360-1323(91)90027-9
  • [7] T. Kusuda, J.W. Bean, ASHRAE Trans. 90, 611 (1984)
  • [8] Ansys 14 User's Manual
Document Type
Publication order reference
YADDA identifier
bwmeta1.element.bwnjournal-article-appv128n2b044kz
JavaScript is turned off in your web browser. Turn it on to take full advantage of this site, then refresh the page.