NatLabRockies / NatLabRockies/OpenStudio-resources

fan_componentmodel fails starting at 3.11.0 due to surface temp out of bounds

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Description

  ** Warning ** SizeWaterCoil: Coil="COIL COOLING WATER 1", Cooling Coil has leaving air temperature < entering water temperature.
   **   ~~~   **     Tair,out  =  -86.074
   **   ~~~   **     Twater,in = 7.220
   **   ~~~   ** ....coil leaving air temperature will be reset to:
   **   ~~~   **     Tair,out = 7.720
   ** Warning ** In calculating the design coil UA for Coil:Cooling:Water COIL COOLING WATER 1
   **   ~~~   ** the coil bypass factor is unrealistically large;
   **   ~~~   ** The initial design conditions are: Tair,in = 31.4745
   **   ~~~   **                                    Wair,in = 1.498219E-002
   **   ~~~   **                                    Twater,in = 7.2200
   **   ~~~   **                                    Tair,out = 7.7200
   **   ~~~   **                                    Wair,out = 8.500000E-003
   ** Warning ** Output:Meter: invalid Key Name="DISTRICTHEATINGWATER:FACILITY" - not found.
   ** Warning ** Output:Meter: invalid Key Name="DISTRICTCOOLING:FACILITY" - not found.
   ** Warning ** Output:Meter:MeterFileOnly requested for "Electricity:Facility" (TimeStep), already on "Output:Meter". Will report to both eplusout.eso and eplusout.mtr
   ************* Testing Individual Branch Integrity
   ************* All Branches passed integrity testing
   ************* Testing Individual Supply Air Path Integrity
   ************* All Supply Air Paths passed integrity testing
   ************* Testing Individual Return Air Path Integrity
   ************* All Return Air Paths passed integrity testing
   ************* No node connection errors were found.
   ************* Beginning Simulation
   ** Severe  ** CalcHeatBalanceInsideSurf: The temperature of 10391.91 C for zone="STORY 1 CORE THERMAL ZONE", for surface="STORY 1 CORE SPACE TO STORY 1 EAST PERIMETER SPACE INTERIOR WALL"
   **   ~~~   ** ..is very far out of bounds during warmup. This may be an indication of a malformed zone.
   **   ~~~   **  During Warmup, Environment=RUN PERIOD 1, at Simulation time=01/01 07:29 - 07:30
   **  Fatal  ** Program terminates due to preceding condition.
   ...Summary of Errors that led to program termination:
   ..... Reference severe error count=1
   ..... Last severe error=CalcHeatBalanceInsideSurf: The temperature of 10391.91 C for zone="STORY 1 CORE THERMAL ZONE", for surface="STORY 1 CORE SPACE TO STORY 1 EAST PERIMETER SPACE INTERIOR WALL"

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First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start by locating the fan_componentmodel case and reproduce the reported failure with version 3.11.0, using the warmup log to focus on the surface temperature error. Done means the case starts without the CalcHeatBalanceInsideSurf severe error or fatal termination.

Written by the indexing model from the issue text.

Assessment

Domain
testing-qa
Issue type
Bug
Difficulty
3/5
Estimated time
1-2 days
Activity status
Active
Clarity
Needs clarification
Newbie friendliness
42/100

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