blockCapacityRequirement
Cooling capacity requirement
Information
Calculates cooling capacity requirement based on the measured chilled water
return temperature TChiWatRet, calculated chilled water supply
temperature setpoint TChiWatSupSet, and the measured chilled
water flow VChiWat_flow.
The calculation is according to Guideline 36-2021, section 5.20.4.8.
When a stage change process is in progress, as indicated by a boolean input
chaPro, the capacity requirement is kept constant for the longer of
holPer and the duration of the change process.
The calculation is according to Guideline 36-2021, section 5.20.4.9.
Parameters
| Type | Name | Default | Description |
|---|---|---|---|
| Real | avePer | 300 | Time period for the rolling average |
| Real | holPer | 900 | Time period for the value hold at stage change |
Connectors
| Type | Name | Default | Description |
|---|---|---|---|
| Buildings.Controls.OBC.CDL.Interfaces.BooleanInput | chaPro | Stage change process status, true = on, false = off | |
| Buildings.Controls.OBC.CDL.Interfaces.RealInput | TChiWatSupSet | Chilled water supply temperature setpoint | |
| Buildings.Controls.OBC.CDL.Interfaces.RealInput | TChiWatRet | Chilled water return temperature | |
| Buildings.Controls.OBC.CDL.Interfaces.RealInput | VChiWat_flow | Measured chilled water flow rate | |
| Buildings.Controls.OBC.CDL.Interfaces.RealOutput | y | Chilled water cooling capacity requirement |
Revisions
-
July 5, 2019, by Milica Grahovac:
First implementation.