Numerical simulation of heat and moisture propagation in building envelopes during climatic cycles

článek v časopise - ostatní, Jost

angličtina

The heat and moisture propagation in building envelopes is driven by the climatic changes, whose character is nearly periodic they occur in day and year cycles, and is conditioned by both insulation and accumulation properties of particular layers of building structures. We shall demonstrate that the reconstruction of an old panel block of flats is able to prepare better conditions for the condensation of atmospheric vapour on and near the exterior surface of a building envelope; the logical consequence of the occurrence of such wet locations is the population of algae as a visible surface damage and a starting point for further destructive processes. Moreover, the thermal technical material characteristics, namely in case of materials with high porosity, differ dramatically in the wet state and in the dry state; this highlights the significance of the theory and practice of the identification of basic material properties. However, the main result of this paper is the presentation of selected results of numerical simulations for one commonly used structure of the insulation system: firstly with neglected radiation, then respecting the radiation influence. Finally we shall mention some practical recommendations for the producer of building insulations, how to prevent or reduce the damage caused by radiation.

thermal insulation, irradiation, heat and moisture transport, numerical simulation

ŠŤASTNÍK, S.; VALA, J.; STEUER, R.

2007

1. 9. 2007

Slovenská štatistická a demografická spoločnosť

Bratislava

1336-7420

Forum Statisticum Slovacum

3

2

Slovenská republika

193

198

6