.BuildingSystems.Fluid.HeatPumps.ModularReversible.RefrigerantCycle.BaseClasses.PartialRefrigerantCycle

Information

Partial model for calculation of electrical power consumption PEle, condenser heat flow QCon_flow and evaporator heat flow QEva_flow based on the values in the sigBus for a refrigerant machine.

Frosting performance

To simulate possible icing of the evaporator on air-source devices, the icing factor iceFac is used to influence the outputs. The factor models the reduction of heat transfer between refrigerant and source. Thus, the factor is implemented as follows:

QEva_flow = iceFac * (QConNoIce_flow - PEle)

With iceFac as a relative value between 0 and 1:

iceFac = kA/kA_noIce

Finally, the energy balance must still hold:

QCon_flow = PEle + QEva_flow

You can select different options for the modeling of the icing factor or implement your own approach.

Revisions

• October 2, 2022 by Fabian Wuellhorst:
  Adapted based on BuildingSystems implementation. Mainly, the iceFac is added directly in this partial model (see issue #1576)
• November 26, 2018 by Fabian Wuellhorst:
  First implementation (see issue AixLib #577)