modelTestWaterFlow1DFEM_C
Test case for Flow1Dfem
Extends from Modelica.Icons.Example (Icon for runnable examples).
Information
The model is designed to test the component Flow1Dfem (fluid side of a heat exchanger, finite element method).
This model is designed to simulate the flow reversal througth the heat exchanger. The operating fluid is liquid water; the heat flux entering the heat exchanger is set to zero.
During the simulation, flow reversal is achieved:
- t=500 s, Negative ramp variation (duration = 20 s) of the mass flow rate trough the heat exchanger. The final mass flow rate has the same magnitude and opposite direction with respect to the initial one.
Simulation Interval = [0...1000] sec
Integration Algorithm = DASSL
Algorithm Tolerance = 1e-6
Parameters
| Type | Name | Default | Description |
|---|---|---|---|
| Integer | Nnodes | 12 | |
| Modelica.SIunits.Length | Lhex | 200 | |
| Modelica.SIunits.Diameter | Dihex | 0.02 | |
| Modelica.SIunits.Radius | rhex | Dihex/2 | |
| Modelica.SIunits.Length | omegahex | Modelica.Constants.pi*Dihex | |
| Modelica.SIunits.Area | Ahex | Modelica.Constants.pi*rhex^2 | |
| Real | Cfhex | 0.005 | |
| Modelica.SIunits.MassFlowRate | whex | 0.3 | |
| Modelica.SIunits.Pressure | phex | 1e5 | |
| Modelica.SIunits.SpecificEnthalpy | hs | 1e5 |
Components
| Type | Name | Default | Description |
|---|---|---|---|
| Water.Flow1DFEM | hex | ||
| ThermoPower.Water.ValveLin | ValveLin1 | ||
| ThermoPower.Water.SinkPressure | SinkP1 | ||
| ThermoPower.Water.SourceMassFlow | SourceW1 | ||
| Modelica.Blocks.Sources.Ramp | Ramp1 | ||
| Modelica.Blocks.Sources.Constant | Constant1 | ||
| ThermoPower.Water.SensT | T_in | ||
| ThermoPower.Water.SensT | T_out | ||
| System | system |
Contents
| Name | Description |
|---|---|
 Medium |
Revisions
- 7 Jan 2015 by Francesco Casella:
Updated to new FEM model.
- 1 Oct 2003 by Francesco Schiavo:
First release.