The Formulae for Calculating Radiative Heat Fluxes in Systems with Partially Transparent Structures

Abstract

So far, there has been a little imperfection in the analytical theory of the radiation heat transfer. Although there is the calculation formula for non-transparent bodies, but more universal calculation formulae for partially transparent bodies have not yet been found. Up to now, the radiation heat transfer in solar greenhouses, solar collectors and general houses and buildings with windows has been analyzed using the repeated reflection method. However, the repeated reflection method should make a great effort to calculate compared to the effective radiation method, that is to say, the radiosity method. Therefore, we derived formulae for the calculation of radiation heat flux by using the effective radiation method (namely, the radiosity method) when two gray bodies randomly placed in space are partially transparent bodies. As a result, we ensured the universality of calculation theory in the radiation heat transfer.