I am facing and issue with closed aperture in my model.
I assigned some aperture as “operable” and “non operable” for the closed ones.
But when i monitored the Node volume flow rate, there were values for all the aperture even for the closed one.
I appears that in the idf file, the opening factor for the operable aperture is the value i specified but for the closed aperture it is 1 instead of 0.
Yes. Even closed windows have infiltration through them, which the EnergyPlus AFN accounts for.
To change the infiltration through the closed windows, you can change the flow_coefficient_closed and the flow_exponent_closed on the VentilationOpening object inside of a GHPython component:
Thanks @chris for your answer. The thing is that the air flow rate is higher through the closed aperture than opened one while flow_coefficient_closed is set to 0.0014. The probleme is coming from the default opening factor in the EMS part of the idf file. While all operable aperture have the value i gave to them, non operable aperture have an opening factor of 1. It is that defaut value i want to overide without manualy changing it in the idf file.
Best regards,
Andy
The line of code that I added was correct and it was helping work around this fatal error that EnergyPlus throws if you set the SimpleOpening object up to have a zero openable area:
However, I put the line of code in the wrong place such that it was also causing the EMS program to set the window opening to 1 instead of zero (and the EMS program always overwrites whatever is specified on the SimpleOpening object).
I just pushed a change here to put the line of code in the right place:
… and I verified that it writes the correct EMS program for inoperable windows and doors:
You can get the fix on your end now with the LB Versioner and I also just updated the Food4Rhino installer with the fix since it’s a pretty substantial bug that affects any AFN model with inoperable windows.