Publication result detail

On the surface degradation of building claddings caused by thermal radiation

ŠŤASTNÍK, S.

Original Title

On the surface degradation of building claddings caused by thermal radiation

English Title

On the surface degradation of building claddings caused by thermal radiation

Type

Peer-reviewed article not indexed in WoS or Scopus

Original Abstract

The improvement of thermal technical properties of insulation layers is a crucial point of reconstruction of all building objects, in the first place of the large block of flats from the socialistic period in Czechoslovakia, with the aim to extend their lifetime. However, a typical phenomenon of such reconstruction is the occur-rence of algae on the outer surface of the new insulation system and conse-quently their surface degradation. This phenomenon can be explained by the night condensation of vapour from porous material structures, driven by the heat radiation, in Central European climatic conditions active namely in two "windows" in the infra-red wavelength range. The mathematical model of evolu-tion of temperature and moisture fields is based on the physical laws of conser-vation of mass and energy. The numerical simulation of this process, coming from the method of discretization in time and from the finite difference method, makes use of the original software, written in the Pascal code. The comparison of result from numerical simulation and laboratory experiments leads to some recommendations, how to avoid the algae coatings.

English abstract

The improvement of thermal technical properties of insulation layers is a crucial point of reconstruction of all building objects, in the first place of the large block of flats from the socialistic period in Czechoslovakia, with the aim to extend their lifetime. However, a typical phenomenon of such reconstruction is the occur-rence of algae on the outer surface of the new insulation system and conse-quently their surface degradation. This phenomenon can be explained by the night condensation of vapour from porous material structures, driven by the heat radiation, in Central European climatic conditions active namely in two "windows" in the infra-red wavelength range. The mathematical model of evolu-tion of temperature and moisture fields is based on the physical laws of conser-vation of mass and energy. The numerical simulation of this process, coming from the method of discretization in time and from the finite difference method, makes use of the original software, written in the Pascal code. The comparison of result from numerical simulation and laboratory experiments leads to some recommendations, how to avoid the algae coatings.

Keywords

thermal irradiation, heat transfer, ETICS, algae

Key words in English

thermal irradiation, heat transfer, ETICS, algae

Authors

ŠŤASTNÍK, S.

Released

01.09.2007

Publisher

WTA DE

ISBN

1612-0159

Periodical

WTA Journal

Volume

2007

Number

2

State

Federal Republic of Germany

Pages from

223

Pages to

238

Pages count

14

BibTex

@article{BUT44502,
  author="Stanislav {Šťastník}",
  title="On the surface degradation of building claddings caused by thermal radiation",
  journal="WTA Journal",
  year="2007",
  volume="2007",
  number="2",
  pages="223--238",
  issn="1612-0159"
}