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Ansys Learning Forum › Forums › Discuss Simulation › Fluids › Help needed – Solar calculator, Solar BC boundary conditions › Reply To: Help needed – Solar calculator, Solar BC boundary conditions

October 24, 2024 at 2:14 pm
gopalakrishna.gangisetty
Subscriber

 

 

Dear Sir,

Thank you once again for your response. I still have a few uncertainties and would appreciate your guidance. (see the picture Sir). 

 

We have assumed a scenario where both the bottom window glass and the bottom ZnS glass are at 298 K. In this setup, diffuse irradiation will be emitted from the bottom window and ZnS glass into the volume inside the skylight, with heat being removed from the top ZnS glass. Given this,  direct irradiation can be set to 0 but can the diffuse irradiations are 0 across all bands? If so, should the diffuse fraction be set to 1 or 0 for all bands?

Our main objective is to eliminate longwave heat radiation from the bottom ZnS glass to the top ZnS glass, considering that the ZnS is 75% transparent to longwave radiation. Could you also provide guidance on the appropriate values of Theta and Phi for the bottom glass surfaces?

Thank you for your assistance.

 

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