Modelling interior operable windows - error with add wind and stack open area

asked 2022-10-07 16:40:38 -0500

Hi there,

I am modelling a residential building on OpenStudio. I created the geometry in FloorSpace JS on OpenStudio. I am trying to have the interior windows of the building as operable windows that can open and close so I have been attempting to use the 'Add wind and stack open area' measure to do so.

However, when I run the model it always fails as I get the error that 'No windows found in selection matching given construction. This means your model lacks windows or lacks windows with the specified construction.' I have double checked that there are windows in my model with the construction I selected in the measure arguments. I did this by looking in the spaces tab in the subsurfaces section and the construction specified for these interior windows is definitely there and it matches what I specified in the measure.

I have found two other questions about this error on UnMetHours but there does seem to be any suitable answers/solutions so I was wondering if someone would be able to help me with this error?

Thanks!

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answered 2022-10-08 07:09:18 -0500

shorowit

10931 ●180 ●9 https://www.nrel.gov/b...

That measure is intended to model infiltration from outdoors. It doesn't make sense to try to apply this measure to an interior window, since an interior window cannot experience wind from outdoors and stack effect is driven by the temperature difference between indoors and outdoors.

If you are trying to capture air exchange through an operable window that is between two thermal zones, you could use the ZoneMixing or ZoneCrossMixing object, though you'll essentially be defining how much airflow is moving and in which direction. (If you want EnergyPlus to calculate that for you based on zone pressures, you might be able to use the Airflow Network model, though it involves much more detailed inputs and I can't immediately tell if it works with interior windows.)

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