modelEvaporatorCondenserWithCapacity
Extends from AixLib.Fluid.Interfaces.TwoPortHeatMassExchanger.
Information
Deprecation Warning
This model is deprecated, use AixLib.Fluid.HeatPumps.ModularReversible.BaseClasses.EvaporatorCondenserWithCapacity instead.
Model for an evaporator or condenser with the use of a capacity to simulate heat losses.
Used in AixLib.Obsolete.Year2024.Fluid.HeatPumps.HeatPump, the heat flow to or from the volume is calculated in a black box. Thus the heat is directly added to the medium.
In order to model transient states and inertias of a real heat pump, a capacity is added to the base model TwoPortHeatMassExchanger.
The heat exchange between capacity and medium (GIns) is based on a series of heat resistances caused by forced convection and conduction through the capacity of the heat exchanger. Losses or gains in result of heat exchange with the ambient are modeled through the heat exchange coefficient GOut is represented by a series of conductive resistances and the convection to the ambient.
Both parameters GIns and GOut are variable so that the calculation can follow a temperature or flow-rate based approach.
Parameters
| Type | Name | Default | Description |
|---|---|---|---|
| Boolean | is_con | Type of heat exchanger | |
| Modelica.Units.SI.Volume | V | Volume in condenser | |
| Heat losses | |||
| Boolean | use_cap | true | False if capacity and heat losses are neglected |
| Modelica.Units.SI.HeatCapacity | C | Capacity of heat exchanger. If you want to neglace the dry mass of the heat exchanger, you can set this value to zero | |
| Initialization › Capacity | |||
| Modelica.Units.SI.Temperature | TCap_start | Medium.T_default | Initial temperature of heat capacity |
Components
| Type | Name | Default | Description |
|---|---|---|---|
| Modelica.Units.SI.ThermalConductance | GOut | Formular for calculation of heat transfer coefficient on the outside. If you want to simulate a heat exchanger with additional dry mass but without external heat losses, set the value to zero | |
| Modelica.Blocks.Interfaces.RealOutput | GInn | Formular for calculation of heat transfer coefficient on the inside | |
| Modelica.Thermal.HeatTransfer.Components.Convection | conIns | Convection between fluid and solid | |
| Modelica.Thermal.HeatTransfer.Components.Convection | conOut | Convection and conduction between solid and ambient air | |
| Modelica.Thermal.HeatTransfer.Components.HeatCapacitor | heatCap | Heat Capacity | |
| Modelica.Blocks.Sources.RealExpression | heatLossIns | Nominal heat loss coefficient to the inside | |
| Modelica.Thermal.HeatTransfer.Interfaces.HeatPort_a | port_out | Temperature and heat flow to the ambient | |
| Modelica.Blocks.Sources.RealExpression | heatLossOut | Nominal heat loss coefficient to the inside | |
| Modelica.Thermal.HeatTransfer.Sources.PrescribedHeatFlow | preHea | Heat flow rate of the condenser | |
| Modelica.Blocks.Interfaces.RealInput | QFlow_in | Heat flow rate to the medium |
Revisions
-
November 26, 2018 by Fabian Wüllhorst:
First implementation (see issue #577)