Green Roof Soil Thermal Conductivity

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.

Green roof soil thermal conductivity.

In present study f is the thermal conductivity of air as a fluid component of a dry soil. The thermal conductivity for soil was only used on the acob roof analysis since the uppermost sensor used on the green roof analysis 2bn was sitting in 1 5 inches of soil above the surface of the ceiling. Conductivity of green roofs bioresources 14 4 8573 8599. 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.

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. 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. 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. The study concludes that green roofs can lower thermal losses.