.AixLib.Fluid.HeatPumps.ModularReversible.RefrigerantCycle.Frosting.BaseClasses.PartialVelocityBased

Information

Partial model to estimate the icing factor based on ice mass and a frost-growth velocity. Using the maximal ice mass and the current mass, the ice factor is calculated using:

The concept was first used by Vering et al. and further developed during the PhD from Fabian Roemer and published in the paper Roemer et al.

Note, it is important to add the QEva_flow and relHum to the signal bus in order for the frosting models to work properly.

Density of the frost layer can be constant or dynamic using AixLib.Fluid.HeatPumps.ModularReversible.RefrigerantCycle.Frosting.BaseClasses.FrostDensityKorn .

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

Vering, C., Wüllhorst, F., Mehrfeld, P., and Müller, D. (2021). Towards an integrated design of heat pump systems: Application of process intensification using two-stage optimization. Energy Conversion and Management, 250, 114888. https://doi.org/10.1016/j.apenergy.2024.123225

Revisions

• December 22, 2025 by Fabian Roemer:
  First implementation (see issue AixLib #1623)