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Changing window to wall ratio in Sketchup and PAT

asked 2021-03-10 04:26:22 -0500

Houri's avatar

updated 2021-06-22 21:34:44 -0500

I am trying to change the WWR of the medium office prototype building of DOE (to 0.2 and 0.4) In PAT the analysis failed. I tried to see how it changes if I do it manually in sketchup but my model gets distorted. Any help/ though how can I change the WWR in prototype buildings?

Thank you @ David Goldwasser getting back to this issue, I just realized if the model get distorted by changing WWR in Sketchup that means the same thing happens behind the scenes in PAT and OpenStudio! Is there any way that I could change WWR in prototype buildings without ruining the model? C:\fakepath\Midium Office building- DOE model.PNG

C:\fakepath\User input to change the WWR.PNG

C:\fakepath\Change the WWR to 0.20.PNG

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You can change WWR through a measure in PAT, through a user script in the SketchUp Plugin or manually in the SketchUp Plugin. You didn't say why your PAT analysis failed, it could be unrelated to this change. I would recommend the user script in the SketchUp plugin vs. manually altering geometry if you are not familiar with using it.

David Goldwasser's avatar David Goldwasser  ( 2021-03-10 11:25:27 -0500 )edit

Thank you for reply. When I am working with PAT the first arror I recive while adding the measures is "Measure added to project but unable to compute arguments".

Houri's avatar Houri  ( 2021-03-14 18:47:13 -0500 )edit

I am adding this note here for reffernce @David Goldwasser for your information after talking to prof Reichard from Virginia Tech and discusing my results, reviewing model in Sketchup, I realised that the results that I got from PAT are wrong. In another world., as you also know, if changing WWR in Sketup distorts the model, same happens in PAT. However, in PAT we do not see the distorted model and just see the values.

Houri's avatar Houri  ( 2021-06-20 19:25:24 -0500 )edit

@Houri, I thought this worked for you in March? Did something change? Maybe it is unique to specific model. Maybe post new question and include some screenshots and the measure log.

David Goldwasser's avatar David Goldwasser  ( 2021-06-20 22:57:38 -0500 )edit

It worked in PAT, I ran the analysis and had my data. However, seems like behind the scene the model still was distorted and I had fake/wrong data. I attached three snip here from SketchUp one is the base model from DOE, one is the user input box to change WWR and the other is the distorted model after applying the manual WWR input.

Houri's avatar Houri  ( 2021-06-22 21:42:31 -0500 )edit

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answered 2021-03-15 15:02:49 -0500

Do you see this same issue with other measures? If you restart your computer and create a fresh PAT project do you see the same issue? If a fresh PAT project works, then go back to your project, remove the measure. Save the project, then add the measure back (make sure when you remove it that it has been removed from the measures directory). On Windows sometimes files can be corrupted. Which brings up question of what Operating system you are using and what version of PAT/OpenStudio.

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Yes, there was the same issue with other measures, however following your instructions now I am able to run and get the results. Thank you!

The only thing that I slould note, which is not an issue, is that I couldn't find the "energy plus report" measure. So I only added the "openstudio report" measure but after running I got the report with energy plus format! (just tables).

Houri's avatar Houri  ( 2021-03-15 21:53:31 -0500 )edit

Glad that worked, You don’t need a measure to get the EnergyPlus html report. So if you added the OpenStudio Results measure then you should have both.

David Goldwasser's avatar David Goldwasser  ( 2021-03-15 22:33:31 -0500 )edit

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Asked: 2021-03-10 04:26:22 -0500

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Last updated: Jun 22 '21