OpenStudio Simulation Running error

asked 2022-05-26 08:17:18 -0500

Chris R.'s avatar

updated 2022-05-26 08:41:43 -0500

Hello. I am working on a project using OpenStudio and once I start running the simulation I encounter some fatal errors making the simulation unable to run. Opening the eplusout.err I see these specific types of errors:

"Severe * FenestrationSurface:Detailed="FACE 265", invalid blank Outside Boundary Condition Object * ~~~ ** ...when Base surface uses "Surface" as Outside Boundary Condition Object, subsurfaces must also specify specific surfaces in the adjacent zone."

Reference severe error count=122 ..... Last severe error=FenestrationSurface:Detailed="FACE 968", invalid blank Outside Boundary Condition Object.

My model's geometry is made through the floorspace.js and there seems to be an issue with the Subsurfaces on my building. (Doors, Windows, Glass Partitions etc.) In the subsurfaces tab I notice that there are blank spaces in the "Outside Boundary Condition Object" section.

I tried to edit these subsurfaces through Sketchup but I just don't seem to get it right. Any help would be appreciated.

My model:

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I see you have interior windows in the FloorSpaceJS file, I don't think interior windows have been tested, I didn't even know it was possible. I will check out the file when I get time but y guess is the windows belongs to one or the other space, and doesn't have a sub-surface to match with in the adjacent space. It might take a week but I should be able to give you some feedback, and see if I can update a measure to handle that.

David Goldwasser's avatar David Goldwasser  ( 2022-05-26 18:30:42 -0500 )edit

Hello and thank you for your response.

Where exactly did you find interior windows in my geometry? I double checked my Floorspace.js in the geometry editor tab and I didn't observe any. Moreover, I noticed that some Subsurfaces that the "error" refers to, are also doors in the elevator spaces for example.

Thank you for your time!

Chris R.'s avatar Chris R.  ( 2022-05-26 18:46:59 -0500 )edit

@Chris R., sorry looks like interior doors not windows, but same interior sub-surface issue as interior windows.

David Goldwasser's avatar David Goldwasser  ( 2022-05-27 09:17:36 -0500 )edit

Okay. I will be waiting for any feedback you can give me.

Thanks again.

Chris R.'s avatar Chris R.  ( 2022-05-27 10:36:04 -0500 )edit

In general, it is best not to model interior sub-surfaces. Usually the temperature difference between the adjacent thermal zones is minimal, thus there is very little heat transfer. In addition, the heat transfer properties of a hollow interior wall are similar enough to those of an interior door. Modeling these sub-surfaces just increases processing time and complicates the energy model with very little benefit.

It also appears that your model has some material property issues. Eg. The balcony opening is made out of an air gap material. Conductivity may be to low for a "reality check"

Ski90Moo's avatar Ski90Moo  ( 2022-05-27 10:49:00 -0500 )edit