modelConstantPropertyLiquidWater
Extends from Modelica.Icons.Example (Icon for runnable examples).
Information
This model evaluates different AdiabaticThermodynamicModels based on an exemplary pressurization of liquid water (ConstantPropertyLiquidWater).
Simulation time represents the applied pressure difference, which increases linearly
from zero to dp = 100 bar at time = 1.
The figure below shows the resulting power:
The isothermalReference (h_out_is = h(p_out, T_in)) and
fullMedium (h_out_is = h(p_out, s_in)) formulations
yield zero power because in the ConstantPropertyLiquidWater medium model
enthalpy is defined as a function of temperature only (h = h0 + c*(T - T0)),
thereby neglecting the pressure-dependent flow work term dp/rho.
Note a bug caused an additional offset for fullMedium, see
https://github.com/DLR-SR/ThermofluidStream/pull/313
.
For more details regarding the underlying assumptions, 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.