A novel analytical solution for the transmissivity of curved transparent surfaces with application to solar radiation

作者：El Maghlany Wael M^*

来源：Applied Thermal Engineering, 2016, 100: 392-397.

DOI：10.1016/j.applthermaleng.2016.02.062

• Transmissivity
• Solar energy
• Curved surfaces

In this article, a novel mathematical expression for calculating the transmissivity of curved transparent surfaces due to sun rays for both direct and diffuse radiation is presented. An analytical solution is performed for the transmissivities of both direct and diffuse radiation - tau(gn) and tau(gd) - as functions of the latitude (phi), orientation (gamma)], and the curved surface aspect ratio (P = b/a) to derive new parameters that are defined as direct and diffuse radiation coefficients ((Gamma(n)) over bar, and (Gamma(d)) over bar). Hence, such parameters can be directly used to evaluate the total transmitted solar-energy through curved transparent surfaces that are widely used in greenhouses as well as new designs of solar collectors with curved glass covers. The proposed mathematical expression should be of significant value to the design of solar equipment in a wide range of applications.

• 出版日期2016-5-5