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

Result code in 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>

Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

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

Original language description

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

Czech name

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Czech description

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Type

D - Article in proceedings

CEP classification

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OECD FORD branch

20101 - Civil engineering

Project

<a href="/en/project/LO1408" target="_blank" >LO1408: AdMaS UP – Advanced Building Materials, Structures and Technologies</a><br>

Continuities

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

Publication year

2019

Confidentiality

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

Article name in the collection

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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Number of pages

1

Pages from-to

13-13

Publisher name

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

Place of publication

Bratislava

Event location

Bratislava

Event date

Nov 7, 2019

Type of event by nationality

EUR - Evropská akce

UT code for WoS article

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