Model of the Solar Diffuse Radiation Transmission Through Opaque Shuttle Louvers and Experimental Verification

Abstract

The main problem of previous methods for calculating the solar diffuse radiation transmission through shading louvers is that they can only deal with flat slats. Taking the radian and dimension of louvers into consideration, a new model of solar diffuse radiation transmission through opaque shuttle louvers was established and experimentally verified in this paper. Firstly, the new calculation model was established, and then a computer program was developed with MATLAB, which can be used to study the solar diffuse radiation transmission through shuttle louvers. Secondly, an experimental set-up was built to verify the new model, and the results showed that the model predictions compared well with the experimental data. Finally, the error of the conventional calculation methods was analyzed, and the results shows that, the “flat slat model†leads to overestimation of the transmittance of diffuse radiation, and the relative error increased from 10.28% to 453.03% when the rotation angle increasing from 0 to 85°.