modelTestLiqLoopDowcal100
Test of medium Dowcal100 for a liquid loop
Extends from Modelica.Icons.Example.
Information
TestLiqLoopDowcal100 is a Modelica test model for Dowcal 100, an incompressible heat transfer fluid.
It simulates a liquid loop system with a primary Dowcal 100 circuit and a secondary CO2 circuit.
The primary loop includes a reservoir, centrifugal pump, flow resistances, and heating element. A 40 kW heating element adds thermal energy to the Dowcal 100 fluid. The pump maintained a temperature difference of 15°C across the conduction element.
The secondary loop uses a counter-flow heat exchanger (evaporator) for cooling with CO2 as cooling medium. A PI controller regulates CO2 sink pressure to maintain an evaporator outlet temperature of 30°C in the liquid loop.
Components
| Type | Name | Default | Description |
|---|---|---|---|
| ThermofluidStream.HeatExchangers.DiscretizedCounterFlowHEX | evaporator | ||
| ThermofluidStream.Processes.FlowResistance | flowResistance1 | ||
| ThermofluidStream.Processes.Pump | pump | ||
| ThermofluidStream.Processes.ConductionElement | conductionElement | ||
| Modelica.Thermal.HeatTransfer.Sources.PrescribedHeatFlow | heating_element | ||
| Modelica.Blocks.Sources.RealExpression | heat | ||
| ThermofluidStream.Boundaries.Reservoir | reservoir | ||
| ThermofluidStream.Boundaries.Source | source1 | ||
| ThermofluidStream.Boundaries.Sink | sink1 | ||
| ThermofluidStream.Processes.FlowResistance | flowResistance2 | ||
| ThermofluidStream.Sensors.MultiSensor_Tpm | multiSensor_Tpm3 | ||
| Modelica.Blocks.Nonlinear.Limiter | limiter1 | ||
| Modelica.Blocks.Continuous.PI | PI1 | ||
| Modelica.Blocks.Math.Feedback | feedback1 | ||
| Modelica.Blocks.Sources.RealExpression | refFlow_setPoint1 | ||
| ThermofluidStream.DropOfCommons | dropOfCommons | ||
| Modelica.Blocks.Nonlinear.Limiter | limiter2 | ||
| Modelica.Blocks.Continuous.PI | PI2 | ||
| Modelica.Blocks.Math.Feedback | feedback2 | ||
| Modelica.Blocks.Sources.RealExpression | refFlow_setPoint2 | ||
| Modelica.Blocks.Sources.RealExpression | inlet_temp | ||
| Sensors.MultiSensor_Tpm | multiSensor_Tpm4 | ||
| Sensors.MultiSensor_Tpm | multiSensor_Tpm2 | ||
| Sensors.MultiSensor_Tpm | multiSensor_Tpm1 | ||
| Sensors.DifferenceSensor_Tp | differenceSensor_Tp |
Contents
| Name | Description |
|---|---|
| SecondaryMedium | |
| TertiaryMedium |
Revisions
-
2026, by Raphael Gebhart (raphael.gebhart@dlr.de):
Introduced new version ofdp_tau_const_isentroppump function. -
06/2026, by Corentin Lepais (corentin.lepais@dlr.de):
Improve documentation, graphic layer and controller performances.