In the building sector, both passive and active systems are essential for achieving a high-energy performance. Considering passive solutions, green roofs represent a sustainable answer, allowing buildings to reach energy savings, and also reducing the collateral eect of the Urban Heat Island (UHI) phenomenon. In this study, a roof-lawn system was investigated by means of an extended measurement campaign, monitoring the heat transfer across the roof. Heat-flow meters and air-and surface-temperature probes were applied in a real building, in order to compare the performance of the roof-lawn system with a conventional roof. This experimental approach was followed to quantify the dierent thermal behaviors of the building components. Moreover, an equivalent thermal model of the roof-lawn system was studied, in order to obtain the equivalent thermal properties of the roof, useful for setting building models for yearly energy simulations. The roof-lawn system revealed its advantages, showing a higher thermal inertia with no overheating in summertime and a lower thermal transmittance with energy savings in wintertime, and, consequently, better indoor conditions for the occupants of the building.

Guattari, C., Evangelisti, L., Asdrubali, F., De Lieto Vollaro, R.L. (2020). Experimental evaluation and numerical simulation of the thermal performance of a green roof. APPLIED SCIENCES, 10(5), 1767 [10.3390/app10051767].

Experimental evaluation and numerical simulation of the thermal performance of a green roof

Guattari C.;Evangelisti L.;Asdrubali F.;
2020-01-01

Abstract

In the building sector, both passive and active systems are essential for achieving a high-energy performance. Considering passive solutions, green roofs represent a sustainable answer, allowing buildings to reach energy savings, and also reducing the collateral eect of the Urban Heat Island (UHI) phenomenon. In this study, a roof-lawn system was investigated by means of an extended measurement campaign, monitoring the heat transfer across the roof. Heat-flow meters and air-and surface-temperature probes were applied in a real building, in order to compare the performance of the roof-lawn system with a conventional roof. This experimental approach was followed to quantify the dierent thermal behaviors of the building components. Moreover, an equivalent thermal model of the roof-lawn system was studied, in order to obtain the equivalent thermal properties of the roof, useful for setting building models for yearly energy simulations. The roof-lawn system revealed its advantages, showing a higher thermal inertia with no overheating in summertime and a lower thermal transmittance with energy savings in wintertime, and, consequently, better indoor conditions for the occupants of the building.
Guattari, C., Evangelisti, L., Asdrubali, F., De Lieto Vollaro, R.L. (2020). Experimental evaluation and numerical simulation of the thermal performance of a green roof. APPLIED SCIENCES, 10(5), 1767 [10.3390/app10051767].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11590/363673
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