modelDynamicValidation
example containing validation for dynamic behaviour of membrane-based enthalpy exchanger
Extends from Modelica.Icons.Example (Icon for runnable examples).
Information
This test case shows the comparison between measurement results for a load change and the simulation results.
Measurements were carried out on a membrane-based enthalpy exchanger used in domestic ventilation units by Zehnder Systems at the Institute for Energy Efficient Building and Indoor Climate, RWTH Aachen University.
Parameters
| Type | Name | Default | Description |
|---|---|---|---|
| Integer | nParallel | 184 | Number of identical parallel flow devices |
| Integer | n | 15 | number of discrete segments |
| Modelica.Units.SI.Length | heightDuct | 0.00225 | height of duct |
| Modelica.Units.SI.Length | widthDuct | 0.305 | width of duct |
| Modelica.Units.SI.Length | lengthDuct | 0.34 | length of duct in flow direction |
| Real | aspRatCroToTot | 0.25 | aspect ratio of cross flow |
| Modelica.Units.SI.MassFlowRate | m_flow_nominal | 400/3600*1.18 | nominal mass flow rate |
| Modelica.Units.SI.Pressure | dp_nominal | 119.5 | nominal pressure drop |
| Modelica.Units.SI.Length | thicknessMem | 110E-6 | thickness of membrane |
| Modelica.Units.SI.SpecificHeatCapacity | cpMem | 1900 | mass weighted heat capacity of membrane |
| Modelica.Units.SI.ThermalConductivity | lambdaMem | 0.24 | thermal conductivity of membrane |
| Modelica.Units.SI.Density | rhoMem | 920 | density of membrane |
| Modelica.Units.SI.Temperature | T_start | 283.15 | membrane temperature start value |
| Modelica.Units.SI.Temperature | dT | 10 | Start value for port_b.T - port_a.T |
| Modelica.Units.SI.Pressure | p_start | 1200.0 | membrane concentration start value |
| Modelica.Units.SI.Pressure | dp | 100.0 | Start value for concentration gradient in membrane |
| Modelica.Units.SI.MassFlowRate | m_flow_start | m_flow_nominal | Start value for mass flow rate |
| Real | A | 5.38E7 | constant A of linear dependency equation for permeability |
| Real | B | 4.64E5 | constant B of linear dependency equation for permeability |
Components
Revisions
- October 13, 2020, by Martin Kremer:
First implementation.