modelZhuFrostingZone
Model to indicate which frosting zone according to Zhu et al. is currently active
Information
This model outputs the current frosting zone from Zhu et al. The three zones depend outdoor air temperature and humidity.
References
J.H. Zhu, Y.Y. Sun, W. Wang, S.M. Deng, Y.J. Ge, and L.T. Li. Developing a new frosting map to guide defrosting control for air-source heat pump units. Applied Thermal Engineering, November 2015 doi:10.1016/j.applthermaleng.2015.06.076.
Connectors
| Type | Name | Default | Description |
|---|---|---|---|
| Modelica.Blocks.Interfaces.RealInput | relHum | Input relative humidity of outdoor air | |
| Modelica.Blocks.Interfaces.IntegerOutput | zon | Frosting zon (0=no, 1=mild, 2=moderate, 3=severe) | |
| Modelica.Blocks.Interfaces.RealInput | TOda | Outdoor air temperature |
Components
| Type | Name | Default | Description |
|---|---|---|---|
| Real | relHumSev | poly_fit(coeff_severe, TOda - 273.15) | Relative humidity above which is severe frosting |
| Real | relHumMod | poly_fit(coeff_moderate, TOda - 273.15) | Relative humidity above which is moderate frosting |
| Real | relHumMil | poly_fit(coeff_mild, TOda - 273.15) | Relative humidity above which is mild frosting |
Contents
| Name | Description |
|---|---|
| poly_fitprotected |
Revisions
-
December 22, 2025 by Fabian Roemer:
First implementation (see issue AixLib #1623)