indoorlivingwall - LED Schedule produces constant output

asked 2025-02-11 10:31:10 -0500

updated 2025-02-14 08:33:04 -0500

Update: Link to files: https://drive.google.com/drive/folder... The files: idf, eso and screenshot of relevant eso graph.

Hi all, I'm using an Indoorlivingwall, and for the LED schedule a schedule that varies througout the day. However when I look at the output for the variablse below.

Output:Variable,*,Indoor Living Wall LED Sensible Heat Gain Rate,hourly; !- Zone Average [W]
Output:Variable,*,Indoor Living Wall LED Operational Power,hourly; !- Zone Average [W]

However when I look at the eso file / sql file; the power is on constant value throughout the year?

Lighting method used = LED I've tried by changing the "LED intensity schedule name" and "Schedule name" both schedules made no changes to the output.

If used E+ 24.1 and 24.2 to test.

Is this a bug? Or am I doing something wrong? if its a bug - can anyone tell me where to report the bug?

Thanks! Dolf

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@Dolf Bakker can you upload your model to Google Drive, Dropbox, etc. and then share a URL for others to download? That would help others provide better solutions.

Aaron Boranian ( 2025-02-11 15:20:40 -0500 )edit

Hi Aaron, thanks for asking. Please find a link here (and updated in the question): https://drive.google.com/drive/folder...

in the folder: *.idf, *.eso and a screenshot of the issue shown on an eso graph

Dolf Bakker ( 2025-02-14 08:34:16 -0500 )edit

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2 Answers

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answered 2025-02-19 00:46:45 -0500

ShiweiNG
56 ●3

updated 2025-02-19 00:47:28 -0500

Shorowit has answered the question already.. but to add on further, if we look at the source code "indoorgreens.cc", line 452-453: https://github.com/NREL/EnergyPlus/bl...

We will see that only ZPPFD has LED schedule as a multiplier to its output. Hence operational power does not consider LED schedule.

To change that, we would have to edit the source code, compile and build a custom copy for our own use until E+ team changes it. I have attached an example for my solution for your reference.C:\fakepath\Screenshot 2025-02-19 143723.png

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A simple alternative as provided by Michael from EnergyPlus;

Until the fix is released, you can use OtherEquipment with a negative design value to offset the excess heat gain from the lights.

Dolf Bakker ( 2025-03-04 10:19:48 -0500 )edit

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answered 2025-02-14 16:57:21 -0500

shorowit

12365 ●214 ●9 https://www.nrel.gov/b...

I don't know anything about the object or what was intended, but looking at the source code, only the "Indoor Living Wall PPFD" output variable incorporates the LED schedule.

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