modelFreezeStat
Freeze thermostat with timed lockout
Information
Freeze stat that outputs true if freeze protection should be engaged.
The freeze stat regulates around a set point. When it triggers freeze protection,
then the freeze protection stays engaged for at least delayTime.
It only becomes disengaged after this time period if the measured temperature is above
the set point.
Parameters
| Type | Name | Default | Description |
|---|---|---|---|
| Real | lockoutTime | 900 | Delay time |
| Real | TSet | 276.15 | Temperature below which the freeze protection starts |
Connectors
| Type | Name | Default | Description |
|---|---|---|---|
| Buildings.Controls.OBC.CDL.Interfaces.RealInput | u | Connector of Real input signal used as measurement signal | |
| Buildings.Controls.OBC.CDL.Interfaces.BooleanOutput | y | Connector of Real output signal used as actuator signal |
Components
| Type | Name | Default | Description |
|---|---|---|---|
| Buildings.Controls.OBC.CDL.Logical.TrueDelay | locOut | If freeze stat triggers, keep it on for specified time | |
| Buildings.Controls.OBC.CDL.Logical.Not | freStaSig | Signal for freeze stat | |
| Buildings.Controls.OBC.CDL.Reals.GreaterThreshold | greThr | Greater comparison |
Revisions
-
April 26, 2022, by Michael Wetter:
Enabled hysteresis for freeze stat. This is required to avoid simulation to stall.
This is for #2975. -
April 23, 2021, by Michael Wetter:
First implementation.