WaterSource HeatPump:PlantLoop:EIR:Heating heat imbalance

[yujiex]

Issue overview

for v23.2

1. The reported Heat Pump Source Side Heat Transfer Rate does not match the calculated value (C x delta T x mass flow rate on the source side)
   
   

2. The received heat of the Booser HP is much larger than the heat output from the HEX FOR WHR
   
   

for v25.1

1. the source side temperature will continuously drop to really low (-90C) and cause the program to abort with error
   

2. The reported Heat Pump Source Side Heat Transfer Rate does not match the calculated value (C x delta T x mass flow rate on the source side)
   

3. The received heat of the Booser HP is much larger than the heat output from the HEX FOR WHR
   

Details

Some additional details for this issue (if relevant):

• Platform (Mac 13.5)
• Version of EnergyPlus (23.2 and also 25.1 ec7398a)
• Unmethours link or helpdesk ticket number

Defect files

defect file.zip

initial investigation

reported Heat Pump Source Side Heat Transfer Rate does not match the calculated value

the source side outlet temperature is computed as follows

 this->sourceSideOutletTemp = this->calcSourceOutletTemp(this->sourceSideInletTemp, this->sourceSideHeatTransfer / sourceMCp);

In the following highlighted timestamp, the reported mass flow rate is different from the one used in the calculation of source side outlet temperature: in the debug print below the table, we can see the mass flow rate used here is 35.88, while the reported mass flow rate is about 34.27.

07/01 01-2,sourceSideOutletTemp=-19.350473787357487=-9.822436571462934 - 1441731.3447421258/151314.6214770286,massFlow=35.88205394285715

Checklist

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

• Defect file added (list location of defect file here)
• 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)