Green Roof Heat Transfer

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.

Green roof heat transfer.

A special characteristic of this type of heat transfer is that the material can be cooler than the surrounding air making the wet surface a little cooler than the ambient air temperature. In this study the green roof is considered as a porous media in order to consider the heterogeneous effects where the porous medium is made of several phases and several components. It is a simple concept but describing mathematically how the heat comes and goes can be very difficult. Experimental heat transfer study on green roofs in a semiarid climate during summer 1.

Then the heat transfer processes in green roof with heterogeneous approximation is a porous medium where the heat transfer process takes place. The review let see the evolution of the mathematical modeling in green goof it start with an analysis of the first attempts to model the heat and mass transfer and proceeds to the most representative current models. Green roofs by reducing heat transfer through the building roof can improve indoor comfort and lower the incidence of heat stress associated with heat waves. Improved quality of life.

Green roofs provide aesthetic value and habitat for plant and animal species. In the case of a green roof that material is water. They improve human interaction with nature by introducing green space into the built environment. Improved human health and comfort.

This work reviews and criticisms the most important mathematical models for heat and mass transfer in green roofs developed and published during the last three decades.