A rigorous model for the radiative heat transfer combined with the conduction and the
convection has been applied for a solar collector glazing. The glass cover is analysed as a
non-gray plane-parallel medium subjected to solar and thermal irradiation in one-
dimensional case, using the radiation element method by ray emission model. The model
allows the calculation of the steady-state heat flux and the temperature distribution within the
glass cover. The spectral dependence of the relevant radiation properties of glass (ie …

This paper presented details of a 1-D study of the combined non-gray radiative and
conductive heat transfer in single and double glazing solar collector glass covers. The study
used a ray emission model with a radiation element method. Absorption and emissions from
within the cover layers were modelled using the optical constants of the clear glass materials
commonly used as covers for solar collector systems. Calculations were conducted for both
single and double glazing covers at both high and low temperatures. The model was also …