blockChilledWaterSupply
Sequences to generate setpoints of chilled water supply temperature and the differential pressure
Information
Block that outputs setpoints for the chilled water supply of primary-only and
primary-secondary systems serving differential pressure controlled pumps.
The outputs include supply temperature setpoint TChiWatSupSet
and the differential pressure setpoint dpChiWatSet, according
to ASHRAE Guideline 36-2021, section 5.20.5.2.
Chilled water supply temperature setpoint TChiWatSupSet and the
differential pressure setpoint dpChiWatSet shall be reset based on
the current value of chilled water plant reset uChiWatPlaRes.
Parameters
| Type | Name | Default | Description |
|---|---|---|---|
| Integer | nRemDpSen | 1 | Total number of remote pressure differential sensor |
| Real[nRemDpSen] | dpChiWatMin | fill(34473.8, nRemDpSen) | Minimum chilled water differential pressure setpoint |
| Real[nRemDpSen] | dpChiWatMax | Maximum chilled water differential pressure setpoint | |
| Real | TChiWatSupMin | Minimum chilled water supply temperature. This is the lowest minimum chilled water supply temperature of chillers in the plant | |
| Real | TPlaChiWatSupMax | 288.706 | Maximum plant chilled water supply temperature, default 60 degF |
| Real | minSet | 0 | Minimum plant reset value |
| Real | maxSet | 1 | Maximum plant reset value |
| Real | halSet | 0.5 | Half plant reset value |
Connectors
| Type | Name | Default | Description |
|---|---|---|---|
| Buildings.Controls.OBC.CDL.Interfaces.RealInput | uChiWatPlaRes | Chilled water plant reset | |
| Buildings.Controls.OBC.CDL.Interfaces.RealOutput[nRemDpSen] | dpChiWatSet | Chilled water differential pressure setpoint | |
| Buildings.Controls.OBC.CDL.Interfaces.RealOutput | TChiWatSupSet | Chilled water supply temperature |
Revisions
-
April 15, 2019, by Jianjun Hu:
First implementation.