Hi EngineerMech,

Firstly, As you are solving the RTE, then you don't need to use the solar ray tracing in the solar load. DO irradiation is there to provide you the solar load. So first look at the basic setup. Not necessary to follow up on the problem I posted here as it was my very first attempt. I'll prefer you to visit.


You will find, DO-solar ray tracing doesn't match!

Secondly, try to use symmetric on the sidewalls, and keep lower the boundaries as much you can.