The longwave sky radiation effect on the condensation risk of ventilated double-skin roof structures

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F62156489%3A43410%2F20%3A43918465" target="_blank" >RIV/62156489:43410/20:43918465 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216305:26110/20:PU137907

Výsledek na webu

<a href="https://doi.org/10.1063/5.0025698" target="_blank" >https://doi.org/10.1063/5.0025698</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1063/5.0025698" target="_blank" >10.1063/5.0025698</a>

Jazyk výsledku

angličtina

Název v původním jazyce

The longwave sky radiation effect on the condensation risk of ventilated double-skin roof structures

Popis výsledku v původním jazyce

The condensation risk of the top envelope of low sloped roofs with air ventilated cavity has an important factor in the designing phase of these building structures. The significance of sky radiation plays an important role in the radiation heat exchange specifically during night-time (winter and transient periods) with regard to heat loss and condensation risk at the top roof envelopes. Basically, the design principles and current development of standard requirements have limited and simplified implementation of this phenomenon. The importance of a relevant design of these types of roofs are being addressed as highly important issue in the building application to predict its reliable hygrothermal performance. In this context, the paper presents results of numerical study, where thy sky radiation effect is carefully taken into account. It provides a numerical analysis on the minimalization of the condensation risk at the top envelope of low sloped roofs with naturally ventilated air cavity. Based on this, a performance prediction of thermal properties degree and its influence due to condensation risk occurrence is obtained, where real climate data for location of Brno, Czechia, is specifically employed. The results demonstrate hour&apos;s quantity of condensation risk occurrence in terms of thermal resistance correlation for data obtained through the whole climatic year.

Název v anglickém jazyce

The longwave sky radiation effect on the condensation risk of ventilated double-skin roof structures

Popis výsledku anglicky

The condensation risk of the top envelope of low sloped roofs with air ventilated cavity has an important factor in the designing phase of these building structures. The significance of sky radiation plays an important role in the radiation heat exchange specifically during night-time (winter and transient periods) with regard to heat loss and condensation risk at the top roof envelopes. Basically, the design principles and current development of standard requirements have limited and simplified implementation of this phenomenon. The importance of a relevant design of these types of roofs are being addressed as highly important issue in the building application to predict its reliable hygrothermal performance. In this context, the paper presents results of numerical study, where thy sky radiation effect is carefully taken into account. It provides a numerical analysis on the minimalization of the condensation risk at the top envelope of low sloped roofs with naturally ventilated air cavity. Based on this, a performance prediction of thermal properties degree and its influence due to condensation risk occurrence is obtained, where real climate data for location of Brno, Czechia, is specifically employed. The results demonstrate hour&apos;s quantity of condensation risk occurrence in terms of thermal resistance correlation for data obtained through the whole climatic year.

Druh

D - Stať ve sborníku

CEP obor

—

OECD FORD obor

20101 - Civil engineering

Projekt

<a href="/cs/project/GA20-00630S" target="_blank" >GA20-00630S: Klimaticky adaptivní prvky integrované ve vývoji energeticky a ekologicky efektivní obálky budovy</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2020

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

AIP Conference Proceedings 2275

ISBN

978-0-7354-4005-0

ISSN

0094-243X

e-ISSN

—

Počet stran výsledku

6

Strana od-do

020027

Název nakladatele

American Institute of Physics (AIP)

Místo vydání

Melville

Místo konání akce

Eger

Datum konání akce

2. 9. 2020

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

—