Radiative cooling

Application ID: 75021

Because the atmosphere is nearly transparent to wavelengths in the range 8 to 13 µm (atmospheric window) for a clear sky, it is possible to cool down a surface even during a sunny day. This model compares the temperature distribution on a concrete block exposed to ambient and solar radiation on his upper surface when this surface is a black surface and when it has radiative cooling properties. Convective cooling is not accounted for. This model couples the Heat Transfer in Solids interface with the Surface-to-Surface Radiation interface. 4 spectral bands are used to model the wavelength dependency of the irradiation, of the surface emissivity and of the sky emissivity.

This model example illustrates applications of this type that would nominally be built using the following products: