modelLiquidWater
Extends from Modelica.Icons.Example (Icon for runnable examples).
Information
This model compares various AdiabaticThermodynamicModels using an exemplary pressurization of liquid water (TwoPhaseWater).
Simulation time serves as a proxy for the pressure difference, which increases linearly from
zero to dp = 100 bar at time = 1.
The following figure displays the resulting power:
The fullMedium model serves as the reference. Among the approximations:
incompressibleFluid (h_out_is = dp/rho + h_in) performs better than the
isothermalReference (h_out_is = h(p_out, T_in)).
Note that for fullMedium, the power does not vanish as the pressure difference approaches zero.
In this specific limit, both incompressibleFluid and isothermalReference
demonstrate superior numerical behavior.
For further information regarding the underlying assumptions, please refer to:
ThermofluidStream.Idealized.UsersGuide.AdiabaticThermodynamicModels.
Parameters
| Type | Name | Default | Description |
|---|---|---|---|
| SI.Efficiency | eta | 0.8 | Isentropic efficiency |
Components
| Type | Name | Default | Description |
|---|---|---|---|
| ThermofluidStream.Boundaries.Source | source | ||
| .ThermofluidStream.Boundaries.Sink_m | sink | ||
| ThermofluidStream.DropOfCommons | dropOfCommons | ||
| ThermofluidStream.Idealized.Processes.Adiabatic | fullMedium | ||
| Modelica.Blocks.Sources.Ramp | pressureDifference | ||
| ThermofluidStream.Boundaries.Source | source1 | ||
| .ThermofluidStream.Boundaries.Sink_m | sink1 | ||
| ThermofluidStream.Idealized.Processes.Adiabatic | incompressibleFluid | ||
| ThermofluidStream.Boundaries.Source | source2 | ||
| .ThermofluidStream.Boundaries.Sink_m | sink2 | ||
| ThermofluidStream.Idealized.Processes.Adiabatic | isothermalReference |
Contents
| Name | Description |
|---|---|
 Medium |
Revisions
-
2026, by Raphael Gebhart (raphael.gebhart@dlr.de):
Initial version.