Simulation of humidity and temperature distribution in green roof with pozzolana as drainage layer: influence of outdoor seasonal weather conditions and internal ceiling temperature

Kazemi, Mostafa; Courard, Luc

doi:10.1080/23744731.2021.1873658

Article (Scientific journals)

Simulation of humidity and temperature distribution in green roof with pozzolana as drainage layer: influence of outdoor seasonal weather conditions and internal ceiling temperature

Kazemi, Mostafa; Courard, Luc

2021 • In Science and Technology for the Built Environment, 27 (4), p. 509-523

Peer Reviewed verified by ORBi

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https://hdl.handle.net/2268/255640

DOI
10.1080/23744731.2021.1873658

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Keywords :

humidity and temperature distribution; green roof; pozzolana; seasonal weather conditions; internal ceiling temperature

Abstract :

[en] The outdoor seasonal weather conditions can influence the insulation performance of extensive green roof. In addition, the thermal behavior of extensive green roof can be affected by the thickness of its layers including substrate and drainage layer. On the other hand, the replacement of polyethylene modular panel with porous aggregates as drainage layer can affect the water retention capacity of green roof. Therefore, in this study, the green roofs with pozzolana (porous volcanic gravel) as drainage layer under constant and variable inside temperatures were modeled and subjected to the weather conditions of winter and summer to assess the humidity and temperature variations in the depth of the systems. The results showed that there was a decrease in temperature through the depth of the green roof system for the winter period, while the reverse occurred for the relative humidity. During the winter period, the green roof model with the 10-cm substrate and 8-cm pozzolana was recommended to be used. However, the model with the 8-cm substrate and 6-cm drainage layer had the best insulation performance, particularly for the summer period. Moreover, the internal ceiling temperature fluctuation of system under variable inside temperature was higher than that under constant inside temperature.

Disciplines :

Civil engineering

Author, co-author :

Kazemi, Mostafa ; Université de Liège - ULiège > Département ArGEnCo > Département ArGEnCo

Courard, Luc ; Université de Liège - ULiège > Département ArGEnCo > Matériaux de construction non métalliques du génie civil

Language :

English

Title :

Simulation of humidity and temperature distribution in green roof with pozzolana as drainage layer: influence of outdoor seasonal weather conditions and internal ceiling temperature

Publication date :

21 January 2021

Journal title :

Science and Technology for the Built Environment

ISSN :

2374-4731

eISSN :

2374-474X

Publisher :

Taylor & Francis, United Kingdom

Volume :

Issue :

Pages :

509-523

Peer reviewed :

Peer Reviewed verified by ORBi

Additional URL :

https://www.tandfonline.com/doi/full/10.1080/23744731.2021.1873658

Name of the research project :

CityRoof project: Analogous green roofs for urban ecosystem services (2020-2023)

Funders :

ULiège - Université de Liège
FWB - Fédération Wallonie-Bruxelles

Funding text :

University of Liège-ARC grant

Available on ORBi :

since 22 January 2021

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