modelAntiFreeze
Model to prevent source from freezing
Extends from BaseClasses.PartialSafetyWithCounter.
Information
This model is used to prevent freezing of the condenser or evaporator side. A real device would shut off as well.
This models takes the minimum of the two temperatures evaporator outlet and condenser inlet. If this minimal temperature falls below the given lower boundary, the hystereses will trigger an error and cause the device to switch off.
Assumptions
This block does not check the evaporator inlet or condenser outlet temperatures because they are assumed to be always higher than the other side.Parameters
| Type | Name | Default | Description |
|---|---|---|---|
| Modelica.Units.SI.ThermodynamicTemperature | TAntFre | 276.15 | Limit temperature for anti freeze control |
| Real | dTHys | 2 | Hysteresis interval width |
Components
| Type | Name | Default | Description |
|---|---|---|---|
| Modelica.Blocks.Logical.Hysteresis | hys | Hysteresis to indicate if freezing occurs | |
| Modelica.Blocks.Math.Min | min | Minimum of evaporator outlet and condenser inlet temperatures |
Revisions
-
May 27, 2025 by Fabian Wuellhorst:
Make safety checks parallel (see issue IBPSA #2015) -
May 26, 2025 by Fabian Wuellhorst and Michael Wetter:
Increase error counter only when device should turn on (see issue IBPSA #2011) -
October 2, 2022 by Fabian Wuellhorst:
Adapted based on AixLib implementation (see issue #1576) -
November 26, 2018 by Fabian Wuellhorst:
First implementation (see issue AixLib #577)