Green Roof Soil Thermal Conductivity

Construction with a thick soil layer of 0 5 0 9 m thermal losses are almost half compared.

Green roof soil thermal conductivity.

The thermal conductivity of the green roof soil in i p units ranged between 1 2 at 0 saturation and 2 84 at 82 saturation. Conductivity of green roofs bioresources 14 4 8573 8599. Green roofs with silt clay soil required more than twice the amount of soil moisture than green roofs with sand to achieve similar roof heat transfer rates. Traditional roof green roof n sensible et r q q q substrate 0 where r n net radiation q sensible sensible heat flux due to convection q et latent heat flux due to convection q substrate roof conductive heat flux through roof n sensible r q q roof 0 energy balance.

With those of a bare roof. 8576 𝜅2𝑃 𝑓 1 𝑓 1 𝜅2𝑃 1 1 1 where s and f w mk are the thermal conductivities of solid and fluid phases respectively. For the acob analysis the soil was considered to be fairly saturated at the bottom of the soil layer where the soil analysis was done. The best net heat flux gains for vegetated green roofs were 4 7 w m 2 for the sand roof and 7 8 w m 2 for the silt clay roof.