How can I set Solar Absorptance for windows?
I am trying employing a CFD software to study site-specific weather boundary conditions. It takes into account incoming solar radiation as well as convection heat exchanges, providing surface temperatures through a global energy balance. I can, therefore, use EnergyPlus actuators on each wall to override the surface temperature.
The surface temperature provided by the CFD software already takes into account the radiative heat exchange with the sun, so I can't include it twice. I have to exclude the solar heat gain impact on my building model, modifying the building material properties. I can't just set the incoming radiation to 0 otherwise I would deny the "light gains" and the "heat gains" that come with the light filtered through the window glass.
I am setting the Solar Absorptance on the walls equal to 0 and I get the result I want. However, how can I set the same for a window.
window?
Basically, what I am trying to do is to exclude the radiant heat gain from the surface heat balances. I would like to exclude the solar heat gain on windows surfaces, without excluding the light solar contribution.
Is there any way to do that, besides the Solar Absorptance coefficient?