Question-and-Answer Resource for the Building Energy Modeling Community
 | 1 | initial version |
Be sure that the Solar Distribution input field of the Building object is set to an option that accounts for exterior reflections. This will tell EnergyPlus to account for the reflections off of the inclined mirror surface that would strike the first plane. You should also be sure to use the ShadingProperty:Reflectance object to tell EnergyPlus the diffuse and/or spectral reflectance properties of the mirror surface (if it's modeled as a shading surface and not a building surface like a wall).
The specific output variable that you are interested in depends on whether you drew the first plane as a shading surface object or a building surface object. If you run a simulation with the Output:VariableDictionary object included in the input file, EnergyPlus will generate the report data dictionary (RDD) file that shows the list of available output variables that you can examine. You can search here for "reflect" or "incident" or any other keyword you are interested in. If you want to have EnergyPlus generate that output variable of interest, create a new Output:Variable object with the same variable name.
