PTAC systems failed

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

atmaca
113 ●1 ●3 ●9

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

Aaron Boranian

13830 ●76 ●24 http://bigladdersoftware.com/

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

ericringold

10527 ●31 ●8 https://www.nrel.gov/b...

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.