Heat transfer through conventional or green roof is unsteady and depends on short - and long-wave radiation air temperature,, Difference and heat accumulation in roof construction as well as moistened green roof growing media. It can be determined. Considering one-dimensional transient conduction within, roof construction green roof drainage and growing media coupled. With energy balance equation for outer roof surface. For the green roof heat and mass transfer model a coupled heat balance. Equations are formed for the foliage (vegetation) layer (Eq. 1) and for the green roof growing media surface (Eq. 2). Green. Roof energy balance equations take into account the main heat fluxes that influence thermal response of the roof construction. As it is shown in Fig.1: global solar radiation absorbed by the foliage QG F and, the growing media QG g long-wave radiation,,, Exchange between the sky and the, foliage QIR sky f or, growing, media QIR sky GM as, well as between the foliage and the growing. ,,, media QIR F G foliage sensible heat flux Qs latent heat, flux by evapotranspiration Ql and conduction within growing media. Qc.Fig.
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