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Corrects crash in DOAS fan sizing #10816

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Corrects crash in DOAS fan sizing #10816

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@rraustad rraustad commented Nov 7, 2024 •
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Pull request overview

NOTE: ENHANCEMENTS MUST FOLLOW A SUBMISSION PROCESS INCLUDING A FEATURE PROPOSAL AND DESIGN DOCUMENT PRIOR TO SUBMITTING CODE

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@rraustad rraustad added the Defect Includes code to repair a defect in EnergyPlus label Nov 7, 2024
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rraustad commented Nov 7, 2024
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src/EnergyPlus/Autosizing/SystemAirFlowSizing.cc
} else {
this->autoSizedValue = this->finalSysSizing(this->curSysNum).DesOutAirVolFlow;
}
} else {
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@rraustad rraustad Nov 7, 2024 •
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The code change is from here to line 780 above. The below is just git confusion.

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rraustad commented Nov 7, 2024

The defect file now runs, and shows confusing fan sizing, since both fans are autosize, as:

image

And the peak day is of course blank:

image

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github-actions bot commented Nov 7, 2024

⚠️ Regressions detected on macos-14 for commit cf547a0

Regression Summary
  • EIO: 3
  • MTR Big Diffs: 1
  • Table Big Diffs: 3
  • Table String Diffs: 2
  • ESO Big Diffs: 1

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rraustad commented Nov 7, 2024

The DOAS fans are being read in as autosize

image

but when the extract fan gets to sizing it is set to a hard flow rate. I can't find where this is happening. The DOAS supply fan doesn't have this issue and sizes normally for an autosized fan (i.e., the first table here).

image

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rraustad commented Nov 7, 2024

OK, the extract fan flow is getting set here, but I don't understand the timing or why this needs to be done. The supply fan doesn't get called in this order.

image

@rraustad rraustad added this to the EnergyPlus 25.1 milestone Nov 7, 2024
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rraustad commented Nov 8, 2024

If I comment out line 997 I get:

image

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github-actions bot commented Nov 8, 2024

⚠️ Regressions detected on macos-14 for commit b4d8e7a

Regression Summary
  • EIO: 4
  • MTR Big Diffs: 1
  • Table Big Diffs: 3
  • Table String Diffs: 2
  • ESO Big Diffs: 1

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Defect Includes code to repair a defect in EnergyPlus
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Successfully merging this pull request may close these issues.

AirLoopHVAC:DedicatedOutdoorAirSystem vector issue in sizing
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