NatLabRockies / NatLabRockies/EnergyPlus

WaterHeater Heatpump sizing issue

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C++
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Description

Issue overview

I tried to hard sized WaterHeater:HeatPump:PumpedCondenser object but still get bypass factor Psychrometric function calculation error. There is similar issue (#8412) but it's Stratified Tank object. Not sure if WaterHeater:HeatPump:PumpedCondenser/Coil:WaterHeating:AirToWaterHeatPump:Pumped have same issue - The error log did not point to particular object. Did turn off sizing option in simulation control but keeps fail

Details

Some additional details for this issue (if relevant):

  • Platform: Mac OS/ Windows
  • Version of EnergyPlus: 9.4
  • Unmethours link or helpdesk ticket number
Checklist

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

  • [x ] Defect file added (link of idf, epw and error report)
  • Ticket added to Pivotal for defect (development team task)
  • Pull request created (the pull request will have additional tasks related to reviewing changes that fix this defect)

Contributor guide

Open the contributing guide

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 with the linked defect file and the EnergyPlus 9.4 reproduction, focusing on WaterHeater:HeatPump:PumpedCondenser and Coil:WaterHeating:AirToWaterHeatPump:Pumped. Compare the failure with issue #8412 and determine which object triggers the psychrometric function calculation error. Done means the failing object and reproducible error are identified clearly enough to guide a fix.

Written by the indexing model from the issue text.

Assessment

Tech stack
cpp
Domain
tooling
Issue type
Bug
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Needs clarification
Newbie friendliness
25/100

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