On the Energy Performance of an Innovative Green Roof in the Mediterranean Climate

Green roofs have a thermal insulating effect known since ancient times. In the building sector, green roofs represent a sustainable passive solution to obtain energy savings, both during winter and summer. Moreover, they are a natural barrier against noise pollution, reducing sound reflections, and...

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Bibliographic Details
Published in:Energies (Basel) 2020-10, Vol.13 (19), p.5163
Main Authors: Evangelisti, Luca, Guattari, Claudia, Grazieschi, Gianluca, Roncone, Marta, Asdrubali, Francesco
Format: Article
Language:English
Subjects:
Air temperature
Biodiversity
Buildings
Concrete
dynamic model
Energy
Energy conservation
Flowmeters
Green buildings
green roof
Green roofs
Heat
Heat flow
Heat transmission
Insulation
measurements
monitoring
Noise pollution
Noise reduction
Overheating
Pollution control
Reinforced concrete
Roofing
Roofs
Sensors
Summer
Sustainable design
Temperature
Temperature sensors
thermal behavior
Urban areas
Winter
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Summary:Green roofs have a thermal insulating effect known since ancient times. In the building sector, green roofs represent a sustainable passive solution to obtain energy savings, both during winter and summer. Moreover, they are a natural barrier against noise pollution, reducing sound reflections, and they contribute to clean air and biodiversity in urban areas. In this research, a roof-lawn system was studied through a long experimental campaign. Heat-flow meters, air and surface temperature sensors were used in two buildings characterized by different surrounding conditions, geometries and orientations. In both case studies, the thermal behaviors of the roof-lawn system were compared with the conventional roofs. In addition, a dynamic simulation model was created in order to quantify the effect of this green system on the heating and cooling energy demands. The roof-lawn showed a high thermal inertia, with no overheating during summer, and a high insulating capacity, involving energy savings during winter, and consequently better indoor thermal conditions.
ISSN:1996-1073
1996-1073
DOI:10.3390/en13195163