EnergyPlus Crashes with Fan:SystemModel with Discrete speeds - Githubissues

NREL / EnergyPlus

EnergyPlus™ is a whole building energy simulation program that engineers, architects, and researchers use to model both energy consumption and water use in buildings.

https://energyplus.net

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EnergyPlus Crashes with Fan:SystemModel with Discrete speeds #10845

Open Ski90Moo opened 15 hours ago

Ski90Moo commented 15 hours ago

Issue overview

Please see https://unmethours.com/question/100609/how-to-implement-fansystemmodel-with-discrete-speeds/

Details

Some additional details for this issue (if relevant):

Platform (Operating system, version) Windows 11
Version of EnergyPlus (if using an intermediate build, include SHA) 24.2
Unmethours link or helpdesk ticket number https://unmethours.com/question/100609/how-to-implement-fansystemmodel-with-discrete-speeds/

Checklist

Add to this list or remove from it as applicable. This is a simple templated set of guidelines.

[x] Defect file added (list location of defect file here)https://www.dropbox.com/t/mZ59GtQHkCVlT7E5
[ ] Ticket added to EnergyPlus Defect Complexity (Github Project)
[ ] Pull request created (the pull request will have additional tasks related to reviewing changes that fix this defect)

Workaround:

Autosizing cooling and heating air flow rate inputs mayy avoid this crash.

rraustad commented 10 hours ago

Crash is here in GetVRFInput before the fan is sized and before massFlowAtSpeed is allocated: