happy to see the LBT 1.3.0 has been released! I’m interested in the topic about how to simulate air flow network and convection heating transfer of big spaces in honeybee & energyplus. However, there are some problems when I design a model, which contains skylight in energy simulation with AFN. Please refer to the picture below.
I guess, that the roof or skylight aperture can’t be recognized correctly in AFN model, but I don’t know how to solve it. Is there any suggestions from your guys? Skylight_AFN.gh (80.5 KB)
Ah, I was wondering when an issue like this might be discovered. I knew that the objects we were using for windows with the AFN weren’t made to model perfectly horizontal openings but I though that everything would be alright when the skylights weren’t operable like your model. I guess EnergyPlus is just particularly fussy when it comes to the AFN.
I think I probably get a fix for this case merged into the development version of the plugin today or tomorrow. I should clarify that the EnergyPlus AFN doesn’t currently support operable skylights that are perfectly horizontal since the math around this type of bi-directional flow gets really complex. But I should be able to get your model to simulate without issues since the horizontal skylights are not operable.
Thanks for your quick reply, Chris! Now I understand the temporarily inherent defects of AFN algorithm in Energyplus. However, although I turn off the “operable” option for skylight, the problem still exist.
