Publication detail

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

ŠŤASTNÍK, S. VALA, J. STEUER, R.

Original Title

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

English Title

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

Type

journal article - other

Language

en

Original Abstract

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.

English abstract

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.

Keywords

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

RIV year

2007

Released

01.09.2007

Publisher

Slovenská štatistická a demografická spoločnosť

Location

Bratislava

ISBN

1336-7420

Periodical

Forum Statisticum Slovacum

Year of study

3

Number

2

State

SK

Pages from

193

Pages to

198

Pages count

6

Documents

BibTex


@article{BUT44252,
  author="Stanislav {Šťastník} and Jiří {Vala} and Radek {Steuer}",
  title="Numerical simulation of heat and moisture propagation in building envelopes during climatic cycles",
  annote="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.",
  address="Slovenská štatistická a demografická spoločnosť",
  chapter="44252",
  institution="Slovenská štatistická a demografická spoločnosť",
  journal="Forum Statisticum Slovacum",
  number="2",
  volume="3",
  year="2007",
  month="september",
  pages="193--198",
  publisher="Slovenská štatistická a demografická spoločnosť",
  type="journal article - other"
}