I am wondering how EnergyPlus takes incidence angle into account when it calculate solar radiation transmittance from outdoor to indoor. I would believe that there is a different solar heat gain coefficient when solar radiation strikes a glazing pane at noon and afternoon. SHGC in noon could be higher than one in afternoon. Because WINDOW developed by LNBL can show this phenomenon, EnergyPlus could consider SHGC varied in time. Is there information about a calculation method for incidence angle ? In addition, is a calculation method able to consider incidence angle for both a transparent glazing and a translucent glazing?
Your comments are appreciated.
Regards, IT
