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When two AirflowNetwork:MultiZone:SpecifiedFlowRate objeects are specified, energyPlus clashes. [closed]

asked 2023-03-05 20:34:37 -0500

yoshiwara's avatar

updated 2023-03-07 10:13:14 -0500

Hi all,

I am using EnergyPlus Version 22.1. When I specified two AirflowNetwork:MultiZone:SpecifiedFlowRate objeects in IDF file, EnergyPlus clashed.

The IDF file linked is only a partially modified version of a sample file. Two Cracks were replaced with SpecifiedFlowRate.

The console displayed the following messages.

EnergyPlus Starting

EnergyPlus, Version 22.1.0-ed759b17ee, YMD=2023.03.06 11:04

Adjusting Air System Sizing

Adjusting Standard 62.1 Ventilation Sizing

Initializing Simulation

The ERR file was broken off in the middle and there was no clear description of the error.

Is there anything wrong with the above IDF file description? Or is this a glitch or limitation of EnergyPlus?


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Closed for the following reason the question is answered, right answer was accepted by yoshiwara
close date 2023-03-15 18:52:06.965933


shorowit's avatar shorowit  ( 2023-03-06 10:12:47 -0500 )edit

Hmmm, well, it did get tested with more than one at one time, but I'll see if I can figure out what is happening.

Jason DeGraw's avatar Jason DeGraw  ( 2023-03-07 10:52:20 -0500 )edit

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answered 2023-03-15 15:23:08 -0500

updated 2023-03-16 08:54:50 -0500

No, there's nothing wrong with the IDF. There was a bug in input processing that didn't always get hit, so the testing that was done didn't catch it. I put in an issue here and the fix is here.

There isn't a limitation on the number of these objects you can have in a model, but be careful that you don't have too many connected to any particular zone. Conservation of mass will be difficult to maintain if too many flows into a zone are specified.

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Thank you @Jason DeGraw for fix the bug. And thank you for your advice about conservation of mass.

yoshiwara's avatar yoshiwara  ( 2023-03-15 18:50:51 -0500 )edit

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Asked: 2023-03-05 20:34:37 -0500

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Last updated: Mar 16