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OpenStudio doesn't recognize the shadings

asked 2021-10-12 10:14:18 -0500

Olfa's avatar

updated 2022-02-19 07:59:30 -0500

I made a building geometry with SketchUp and i added shadings with the OpenStudio user scripts. The shading surface type was automatically set to "space", and when I launch OpenStudio, shadings weren't recognized. (Facility > Shading > empty list)

I tried to change the type to "building" and I launched OpenStudio. Shadings were added to the list but when I checked the geometry the shadings changed place out of the building.

I'm still new to this field so I think that I missed a step somewhere, I did some research but I couldn't find where was the problem.

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answered 2021-10-19 09:25:06 -0500

When you changed the already existing shading surface type from space to building, the geometry was now defined relative to the building origin and not the space origin. It was probably fine in your initial model .For reference, EnergyPlus supports zone shading, building shading, and site shading. OpenStudio space shading will be converted to EnegyPlus space shading. the only difference between site and building shading, is that site shading is stationary if you change your building rotation, while building shading rotates with the building. As an example if you were going to iterate through rotations of your building, you would want to model adjacent building as site shading, and carefully choose the origin of your building that it will rotate around relative to the site shading objects.

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Thank you for your detailed answer. I had a confusion because I didn't understand the difference between space type and building type. I assumed that the origin of the space is the same of the building and when shadings changed place I thought something was wrong with my model. Based on your answer, I did some research and i have a clearer vision. As you expected, my initial model was fine, I checked the EnergyPlus report and it showed the effect of shading which means there was no problem with the definition of shadings.

Olfa's avatar Olfa  ( 2021-10-20 03:01:35 -0500 )edit

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Asked: 2021-10-12 10:14:18 -0500

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Last updated: Oct 20 '21