modelDiscreteExchanger
Information
DiscreteExchanger
This component models a dry heat exchange. It is a duplication of the component HeatExchanger
from the HeatTransfer package adapted to use fluidports.
Compared with a static exchanger, the following assumptions are performed:
- The mass balance is assumed quasi-static
- The mass fraction is not transported thus it is assumed constant
- Reverse flow is not allowed
- Density is assumed constant along the exchanger
- Mass conservation within the control volume is not respected
- Change of kinetic energy from contraction or expansion in neglected
- Change of temperature from kinetic energy variation is neglected
Parameters
| Type | Name | Default | Description |
|---|
| Integer | N | 3 | Number of discrete layers |
| FlowConfiguration | flowConfiguration | FlowConfiguration.CounterCurrent | |
| Geometrical parameters |
| Modelica.SIunits.Area | A | 1.0 | equivalent exchange surface area |
| Modelica.SIunits.Length | L_A | 1.0 | Length of the side A of the exchanger |
| Modelica.SIunits.Length | L_B | 1.0 | Length of the side B of the exchanger |
| SI.Area | CrossSectionA | 1 | Cross section of the pipe for the fluid A |
| SI.Area | CrossSectionB | 1 | Cross section of the pipe for the fluid B |
| Flow parameters |
| Real | ksi_fixedA | 1.0 | |
| Real | ksi_fixedB | 1.0 | |
Components
| Type | Name | Default | Description |
|---|
| Modelica.SIunits.ThermalConductance | Qc_A | | Thermal flow rate unit of fluid A |
| Modelica.SIunits.ThermalConductance | Qc_B | | Thermal flow rate unit of fluid B |
| Modelica.SIunits.Temperature | T_A_in | | |
| Modelica.SIunits.Temperature | T_A_out | | |
| Modelica.SIunits.Temperature | T_B_in | | |
| Modelica.SIunits.Temperature | T_B_out | | |
| Modelica.SIunits.CoefficientOfHeatTransfer | h_global | | Heat transfer coeffcient between fluid A and B |
| Modelica.SIunits.HeatFlowRate | Q_flow | | Heat flow exchanged |
| Modelica.SIunits.Energy | E | | Energy passed throught the component |
| MediumA.ThermodynamicState | stateA_in | | State of fluid A a inlet |
| MediumB.ThermodynamicState | stateB_in | | State of fluid B a inlet |
| SI.SpecificHeatCapacity | cp_A | | |
| SI.SpecificHeatCapacity | cp_B | | |
| SI.MassFlowRate | m_flowA | | Mass flow rate of fluid A |
| SI.MassFlowRate | m_flowB | | Mass flow rate of fluid B |
| SI.PressureDifference | dp_A | | fluid A pressure drop |
| SI.PressureDifference | dp_B | | fluid B pressure drop |
| TAeZoSysPro.PDE.Transport.UpwindFirstOrder | transport_A | | |
| TAeZoSysPro.PDE.Transport.UpwindFirstOrder | transport_B | | |
MediumA