DESIGN ASSESSMENT OF PITCHED ROOFS WITH HEAVY STRUCTURE USING THE CTF METHOD

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26110%2F19%3APU135233" target="_blank" >RIV/00216305:26110/19:PU135233 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

DESIGN ASSESSMENT OF PITCHED ROOFS WITH HEAVY STRUCTURE USING THE CTF METHOD

Popis výsledku v původním jazyce

Nowadays, very strict thermal and technical requirements for thermal insulation of passive building envelopes are imposed and thus, individual structures need to fulfil severe technical criteria. In order to comply with the passive energy standard in the Czech Republic, heat flow losses in buildings need to be minimized and the air tightness of their envelopes has to be kept between n50 < 0.6/hour. This can be achieved by using thermal insulation materials of considerable thickness and complete airtight sealing of structures, both on the surface and in critical details. However, meeting these requirements might cause problems in the summer months when interiors tend to overheat, reducing users´ general thermal comfort as well as thermal stability of the building. This may be solved by using natural or forced ventilation which is, nevertheless, very often rather inconvenient to operate and generally requires a lot of space. Thus, the best way to improve thermal stability is to improve the properties of the structure itself, especially of the roofing which is frequently a source of problems. Therefore, it is advisable to focus on increasing the specific heat capacity and choosing a construction material with the highest possible weight. This will delay the rise in temperature over time by increasing thermal damping time and finally lead to increased interior temperature stability. However, the increase in energy which is needed to increase the temperature of the shell is closely connected with the risk of accumulation of heat gains. This is considered to be a potentially undesirable effect which may significantly reduce users´ thermal comfort. This paper aims to address this particular issue, focusing especially on the incorrect application of used systems and inappropriate conception of internal operation. The paper introduces an idealized experimental model computed by the CTF method (Conduction Transfer Functions) which was used to compare material shells and tradi

Název v anglickém jazyce

DESIGN ASSESSMENT OF PITCHED ROOFS WITH HEAVY STRUCTURE USING THE CTF METHOD

Popis výsledku anglicky

Nowadays, very strict thermal and technical requirements for thermal insulation of passive building envelopes are imposed and thus, individual structures need to fulfil severe technical criteria. In order to comply with the passive energy standard in the Czech Republic, heat flow losses in buildings need to be minimized and the air tightness of their envelopes has to be kept between n50 < 0.6/hour. This can be achieved by using thermal insulation materials of considerable thickness and complete airtight sealing of structures, both on the surface and in critical details. However, meeting these requirements might cause problems in the summer months when interiors tend to overheat, reducing users´ general thermal comfort as well as thermal stability of the building. This may be solved by using natural or forced ventilation which is, nevertheless, very often rather inconvenient to operate and generally requires a lot of space. Thus, the best way to improve thermal stability is to improve the properties of the structure itself, especially of the roofing which is frequently a source of problems. Therefore, it is advisable to focus on increasing the specific heat capacity and choosing a construction material with the highest possible weight. This will delay the rise in temperature over time by increasing thermal damping time and finally lead to increased interior temperature stability. However, the increase in energy which is needed to increase the temperature of the shell is closely connected with the risk of accumulation of heat gains. This is considered to be a potentially undesirable effect which may significantly reduce users´ thermal comfort. This paper aims to address this particular issue, focusing especially on the incorrect application of used systems and inappropriate conception of internal operation. The paper introduces an idealized experimental model computed by the CTF method (Conduction Transfer Functions) which was used to compare material shells and tradi

Druh

D - Stať ve sborníku

CEP obor

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OECD FORD obor

20101 - Civil engineering

Projekt

<a href="/cs/project/LO1408" target="_blank" >LO1408: AdMaS UP - Pokročilé stavební materiály, konstrukce a technologie</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2019

Kód důvěrnosti údajů

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

Název statě ve sborníku

EnviBUILD 2019 - Buildings and Environment. International Conference, 7th November, Slovak University of Technology, Bratislava. Book of abstracts

ISBN

978-80-227-4959-6

ISSN

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e-ISSN

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Počet stran výsledku

1

Strana od-do

13-13

Název nakladatele

Slovenská technická univerzita v Bratislave, Stavebná fakulta, Katedra konštrukcií pozemných stavieb

Místo vydání

Bratislava

Místo konání akce

Bratislava

Datum konání akce

7. 11. 2019

Typ akce podle státní příslušnosti

EUR - Evropská akce

Kód UT WoS článku

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