modelReverseCycleDefrostHeatPump
Heat pump in reverse cycle operation during defrost
Extends from AixLib.Fluid.Chillers.ModularReversible.RefrigerantCycle.BaseClasses.PartialChillerCycle.
Information
This model can be used to estimate the heat pumps behavior during defrost. It assumes a constant COP and a constant compressor speed (usually low to have efficient defrost). The default values were calibrated for the custom build heat pump at the Institute EBC. Still, note that the model heavily simplifies the real dynamics during defrost. The model was used for studies in the PhD of Fabian Römer, e.g. the publication Römer et al.References
Römer, Fabian and Fuchs, Nico and Fuchs, Nico and Müller, Dirk, Practical, Near-Optimal Design Rule Extraction for Heat Pumps in Single-Family Buildings (September 03, 2025). Available at SSRN: https://ssrn.com/abstract=5633891
Parameters
| Type | Name | Default | Description |
|---|---|---|---|
| Real | COP_constant | 6.25 | COP during defrost (useful side is the evaporator) |
| Real | y_constant | 0.275 | Constant defrost compressor speed |
Components
| Type | Name | Default | Description |
|---|---|---|---|
| Modelica.Blocks.Sources.Constant | conPEle | ||
| Modelica.Blocks.Sources.Constant | conQEva_flow |
Revisions
-
December 22, 2025 by Fabian Roemer:
First implementation (see issue AixLib #1623)