modelReset
Supervisory supply temperature reset
Information
This block implements the supervisory reset of the heating water
supply temperature.
The heating water supply temperature is reset down whenever the
heating demand signal yielded by the building automation system
is false.
This enables operating the chiller at a reduced lift whenever
there is no requirement on the water temperature supplied to the
building system.
Note that the chilled water supply temperature is not reset for the sake of simplicity. It would indeed require a more involved algorithm preventing the reset in case it limits the cold rejection capacity considering the actual district water temperature.
Parameters
| Type | Name | Default | Description |
|---|---|---|---|
| Real | TWatSupSetMinMax | Minimum of maximum value of heating or cooling water supply temperature set point |
Connectors
| Type | Name | Default | Description |
|---|---|---|---|
| Buildings.Controls.OBC.CDL.Interfaces.BooleanInput | u | Heating or cooling enable signal | |
| Buildings.Controls.OBC.CDL.Interfaces.RealInput | TWatSupPreSet | Heating or cooling water supply temperature set point | |
| Buildings.Controls.OBC.CDL.Interfaces.RealOutput | TWatSupSet | Heating or cooling water supply temperature set point after reset |
Components
| Type | Name | Default | Description |
|---|---|---|---|
| Buildings.Controls.OBC.CDL.Reals.Sources.Constant | minSet | Minimum value of HW set point | |
| Buildings.Controls.OBC.CDL.Reals.Switch | swiHea | Switch | |
| Buildings.Controls.OBC.CDL.Reals.LimitSlewRate | ramLimHea | Limit the rate of change |
Revisions
-
March 6, 2025, by Hongxiang Fu:
Renamed variables for generality so that this block could be used for both heating and cooling.
This is for #4133. -
July 31, 2020, by Antoine Gautier:
First implementation.