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EMS Sensor for Zone Exterior Windows Total Transmitted Beam Solar Radiation Rate

asked 2024-06-04 05:22:25 -0500

Phil's avatar

updated 2024-06-06 08:51:58 -0500

Hi there,

I am currently using the OS Version 3.7.0. I would like to use the 'Zone Exterior Windows Total Transmitted Beam Solar Radiation Rate' as an EMS Sensor. The exact same sensor worked with OS Version 3.4.0 a while ago. Julien already mentioned it could be an issue with the newish space topology in E+ but I already tried to use the space name as KeyName without success. To check if the zone name leads to the problem I tried using the same key name for another zone report variabel 'Zone Mean Radiant Temperature' which worked without any problems. Do you have an idea before I try to loop through all windows and setting an EMS sensor for each window?

Error statement: ** Severe ** Invalid Output:Variable or Output:Meter Index Key Name =ZONE - 12 - Office ** ~~~ ** For Output:Variable or Output:Meter = ZONE EXTERIOR WINDOWS TOTAL TRANSMITTED DIFFUSE SOLAR RADIATION RATE ** ~~~ ** Entered in EnergyManagementSystem:Sensor=EMS_ZONE_12_Office_SENSOR ** ~~~ ** Unique Key Name not found. ** Fatal ** Errors found in processing Energy Management System input. Preceding condition causes termination.

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Can you provide your OpenStudio model via e.g. Google Drive or Dropbox?

shorowit's avatar shorowit  ( 2024-06-05 09:47:11 -0500 )edit

Sure, you can find the Model here (

Phil's avatar Phil  ( 2024-06-06 00:50:41 -0500 )edit

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answered 2024-06-06 10:25:45 -0500

You can fix the error by changing "Zone - Space 101" to "Space 101" for the EMS key of the "Zone Exterior Windows ..." sensors, as it appears that EnergyPlus wants a Space reference instead of a Zone reference for these output variables. Is that the intended behavior or a bug? I'm not really sure.

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I filed an EnergyPlus bug report related to this here.

shorowit's avatar shorowit  ( 2024-06-06 10:56:07 -0500 )edit

Thank you! I thought I had tried using the space name as the key, but I messed something up in my measure and didn't check the .osm or the .idf files. Thanks for the bug report, it's exactly what I thought too.

Phil's avatar Phil  ( 2024-06-07 00:26:19 -0500 )edit

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Asked: 2024-06-04 05:22:25 -0500

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Last updated: Jun 06