modelPumpsParallel
Two flow machines in parallel
Extends from Modelica.Icons.Example.
Information
This example tests the configuration of two flow machines that are installed in parallel.
Both flow machines start with full speed.
At t=150 second, the speed of the flow machine on the top is reduced to zero.
As its speed is reduced, the mass flow rate changes its direction in such a way that the flow machine
at the top has reverse flow.
Parameters
| Type | Name | Default | Description |
|---|
| Modelica.Units.SI.MassFlowRate | m_flow_nominal | 1 | Nominal mass flow rate |
| Modelica.Units.SI.Density | rho_nominal | 1000 | Density, used to compute fluid mass |
Components
| Type | Name | Default | Description |
|---|
| IDEAS.Fluid.FixedResistances.PressureDrop | dpIn1 | | Pressure drop |
| IDEAS.Fluid.Movers.SpeedControlled_y | floMac1 | | Model of a flow machine |
| IDEAS.Fluid.FixedResistances.PressureDrop | dpOut1 | | Pressure drop |
| IDEAS.Fluid.Sources.Boundary_pT | sou | | |
| IDEAS.Fluid.FixedResistances.PressureDrop | dpIn | | Pressure drop |
| IDEAS.Fluid.FixedResistances.PressureDrop | dpOut3 | | Pressure drop |
| IDEAS.Fluid.FixedResistances.PressureDrop | dpIn2 | | Pressure drop |
| IDEAS.Fluid.Movers.SpeedControlled_y | floMac2 | | Model of a flow machine |
| IDEAS.Fluid.FixedResistances.PressureDrop | dpOut2 | | Pressure drop |
| Modelica.Blocks.Sources.Step | const1 | | |
Contents
| Name | Description |
|---|
| Medium | Medium model |
Revisions
- February 20, 2016, by Ruben Baetens:
Removal of dynamicBalance as parameter for massDynamics and energyDynamics.
-
April 2, 2015, by Filip Jorissen:
Set constant speed for pump using a parameter
instead of a realInput.
-
May 29, 2014, by Michael Wetter:
Removed undesirable annotation Evaluate=true,
and set rho_nominal to a constant to avoid a non-literal
nominal value for V_flow_max and VMachine_flow.
-
February 14, 2012, by Michael Wetter:
Added filter for start-up and shut-down transient.
-
March 24 2010, by Michael Wetter:
First implementation.