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PTAC systems failed

asked 2022-04-29 19:03:35 -0500

atmaca's avatar

updated 2022-05-02 01:46:21 -0500

Hello Guys,

I have a problem that when I start a simulation in OS file with PTAC, I meet a problem as the image. But I don't know a solution for the problem. Actually, when I try to simulate another HVAC system as "Zone HVAC Low Temperature Radiant Variable Flow", I am facing the same problem again. I need your help these days, which is close to my exam. The image is below. C:\fakepath\image.JPG You can look the file via link (link text).

Thank you.

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answered 2022-05-01 14:33:57 -0500

If you look at eplusout.err you'll see:

** Severe  ** Invalid Output:Variable or Output:Meter Index Key Name =NODE 14
**   ~~~   ** For Output:Variable or Output:Meter = SYSTEM NODE TEMPERATURE
**   ~~~   ** Entered in EnergyManagementSystem:Sensor=GROUND_HX_INLET_TEMP
**   ~~~   ** Unique Key Name not found.
**  Fatal  ** Errors found in processing Energy Management System input. Preceding condition causes termination.

You have an EMS sensor that is referring to a node that doesn't exist, causing the simulation to fail.

If you don't mean to have an EMS program to set ground loop temperatures (assuming you do not, if it's a PTAC run), then delete the EnergyManagementSystem objects.

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answered 2022-05-04 06:44:16 -0500

atmaca's avatar

Thank you for your response. But, I would like to use the PTAC system in the model. I don't know how can I delete the EMS?

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Open the .osm file in a text editor, delete all the 'OS:EnergyManagmentSystem:' objects (lines 12599 - 12627 in your attached file), save.

Eric Ringold's avatar Eric Ringold  ( 2022-05-04 09:47:16 -0500 )edit

Thank you very much. The problem was solved.

atmaca's avatar atmaca  ( 2022-05-04 17:12:08 -0500 )edit

@atmaca, please mark Eric's answer above as accepted then (click the checkmark to make it green)

Julien Marrec's avatar Julien Marrec  ( 2022-05-06 02:58:51 -0500 )edit

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Asked: 2022-04-29 19:03:35 -0500

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Last updated: May 06