modelCarnotWithLosses
Extends from AixLib.Fluid.Chillers.ModularReversible.Modular.
Information
Model of a reversible chiller.
This model extends AixLib.Fluid.Chillers.ModularReversible.Modular and selects the constant Carnot effectiveness module for chillers ( AixLib.Fluid.Chillers.ModularReversible.RefrigerantCycle.ConstantCarnotEffectiveness) and heat pumps ( AixLib.Fluid.HeatPumps.ModularReversible.RefrigerantCycle.ConstantCarnotEffectiveness) to model a reversible chiller. For the heating operation, the nominal approach temperatures are used as a constant to avoid nonlinear system of equations.
Furthermore, losses are enabled to model the chiller with a more realistic behaviour:
- Heat losses to the ambient (can be disabled)
- Refrigerant inertia using a first order delay
- Evaporator frosting assuming an air-sink chiller
For more information, see AixLib.Fluid.HeatPumps.ModularReversible.UsersGuide.
Parameters
| Type | Name | Default | Description |
|---|---|---|---|
| Real | etaCarnot_nominal | 0.3 | Constant Carnot effectiveness |
| Nominal condition | |||
| Modelica.Units.SI.TemperatureDifference | TAppCon_nominal | if cpCon < 1500 then 5 else 2 | Temperature difference between refrigerant and working fluid outlet in condenser |
| Modelica.Units.SI.TemperatureDifference | TAppEva_nominal | if cpEva < 1500 then 5 else 2 | Temperature difference between refrigerant and working fluid outlet in evaporator |
| Refrigerant cycle inertia | |||
| Modelica.Units.SI.Time | refIneTimCon | 300 | Refrigerant cycle inertia time constant for first order delay |
| Integer | nthOrd | 1 | Order of refrigerant cycle interia |
Revisions
-
October 2, 2022 by Fabian Wuellhorst:
First implementation (see issue #1576)