Thermal performance of two different green roofs throughout three winters in Slovakia
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26110%2F26%3A0198183" target="_blank" >RIV/00216305:26110/26:0198183 - isvavai.cz</a>
Result on the web
<a href="https://www.sciencedirect.com/science/article/pii/S0378778825007546?fr=RR-2&ref=pdf_download&rr=9523535ded39a401" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0378778825007546?fr=RR-2&ref=pdf_download&rr=9523535ded39a401</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.enbuild.2025.116024" target="_blank" >10.1016/j.enbuild.2025.116024</a>
Alternative languages
Result language
angličtina
Original language name
Thermal performance of two different green roofs throughout three winters in Slovakia
Original language description
This study presents the results of long-term in situ measurements of the thermal response of experimental green roofs during the winter. The in-situ research measurements were done on experimental green roof segments with 120 and 240 mm thick substrate and a comparative reference gravel segment. They were carried out during winters 2020–2023 in Kosice Dfb 48 degrees 43′N 21 degrees 15′E and feature climatic data of the analysed site, including the thickness of the snow layer present on the experimental segments. The presence of green roof layers reduced the negative heat flux (towards ambient) compared to the reference gravel roof, thus reducing heat losses in favour of the green roofs during the entire monitoring period. The biggest potential of heat loss reductions by applying green roofs was observed during a period of water freezing conditions with no snow layer on rooftops, when thermal response of experimental roofs was strongly influenced by latent heat accumulation in the green roof substrates. During cold consecutive days with all-day frosts, almost identical daily heat losses through both green roof segments (approximate to -57 Wh/(m2)day) were measured regardless of the outdoor climatic parameters while losses through the reference segment ranged from -64 to -77 Wh/(m2)day, representing green roofs' daily heat losses reduction of up to 26% compared to the reference roof. Interannual comparison of two consecutive winters showed that heat loss reduction by green roofs varied with winter severity, with roofs featuring 120 mm and 240 mm substrate layers achieving 9%-14% reduction in the colder winter and 6%-12% in the milder one, compared to the reference gravel roof.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
20101 - Civil engineering
Result continuities
Project
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Continuities
O - Projekt operacniho programu
Others
Publication year
2025
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
ENERGY AND BUILDINGS
ISSN
0378-7788
e-ISSN
1872-6178
Volume of the periodical
344
Issue of the periodical within the volume
116024
Country of publishing house
CH - SWITZERLAND
Number of pages
17
Pages from-to
1-17
UT code for WoS article
001512760400001
EID of the result in the Scopus database
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