2005
DOI: 10.1016/j.enbuild.2005.02.001
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Experimental measurements and numerical modelling of a green roof

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Cited by 281 publications
(126 citation statements)
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“…The experimental result by Feng et al [10] revealed that from the total amount of heat gained by an extensive green roof, 58.4% is released through evapotranspiration process, 9.5% is used for photosynthesis; the remaining part is either released to the atmosphere by long-wave radiative exchange between the canopy and the environment or absorbed by the growing medium. In line with the previous study, Lazzarin et al [11] found the cooling role of evapotranspiration very effective. Based on their field experiment, in case of dry substrate when the evapotranspiration is very limited, a green roof reduced the heat gain by 60%, mostly due to solar reflection and absorption by the canopy and the growing medium.…”
Section: Evapo-transpiratory Effectsupporting
confidence: 80%
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“…The experimental result by Feng et al [10] revealed that from the total amount of heat gained by an extensive green roof, 58.4% is released through evapotranspiration process, 9.5% is used for photosynthesis; the remaining part is either released to the atmosphere by long-wave radiative exchange between the canopy and the environment or absorbed by the growing medium. In line with the previous study, Lazzarin et al [11] found the cooling role of evapotranspiration very effective. Based on their field experiment, in case of dry substrate when the evapotranspiration is very limited, a green roof reduced the heat gain by 60%, mostly due to solar reflection and absorption by the canopy and the growing medium.…”
Section: Evapo-transpiratory Effectsupporting
confidence: 80%
“…However, in winter, thermal resistance of a green roof improves with less water content in the growing medium [24] due to water having a higher thermal conductivity than air [25]. Through a predictive numerical model developed by Lazzarin et al [11] similar conclusions were achieved for winter conditions. They found that a wet green roof has 40% more outgoing heat flux compared to a typical insulated roof.…”
Section: Thermal Insulationmentioning
confidence: 50%
“…Takebayashi and Moriyama (2007) determined that green roofs accounted for reduced heat flux into the building because of the large latent heat flux generated by evaporation. Other studies have focused on the evaporative cooling effect provided by a variety of green roof systems (Lazzarin et al 2005;Onmura et al 2001;Saiz et al 2006). Energy studies have also demonstrated how green roofs can act as an additional layer of insulation for the building (DeNardo et al 2005;Niachou et al 2001;Kumar and Kaushik 2005).…”
Section: Energy and Temperaturementioning
confidence: 99%
“…Vegetated roofs make use of otherwise unused roof surfaces; they are appreciated for their aesthetic character, their influence on urban hydrology (Bengtsson, 2005;Bengtsson et al, 2005;Villarreal & Bengtsson, 2005), their assumed effect on energy demand for comfort cooling during summer months (Theodosiou, 2003) and their capacity to reduce urban temperatures (Lazzarin et al, 2005). Vegetated roofs can also function as important habitats for plants and animals in the urban landscape, but this generally requires a particular focus on biodiversity in the design of the vegetation system (Brenneisen, 2003).…”
Section: Introductionmentioning
confidence: 99%