modelPumpsSeries
Two flow machines in series
Extends from Modelica.Icons.Example (Icon for runnable examples).
Information
This example tests the configuration of two flow machines that are installed in series.
Both flow machines start with full speed.
At t=150 seconds, the speed of the flow machine on the left is reduced to zero.
As its speed is reduced, the mass flow rate is reduced. Note that even at zero input, the mass flow rate is non-zero,
but the pressure drop of the pump floMac1.dp is positive, which means that this pump has a flow resistance.
However, flowMac2.dp is always negative, as this pump has a constant control input of 1.
Parameters
| Type | Name | Default | Description |
|---|
| Modelica.Units.SI.MassFlowRate | m_flow_nominal | 1 | Nominal mass flow rate |
| Medium.ThermodynamicState | state_start | Medium.setState_pTX(T = Medium.T_default, p = Medium.p_default, X = Medium.X_default) | Start state |
| Modelica.Units.SI.Density | rho_nominal | Medium.density(state_start) | Density, used to compute fluid mass |
Contents
| Name | Description |
|---|
 Medium | |
Revisions
-
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.
-
February 14, 2012, by Michael Wetter:
Added filter for start-up and shut-down transient.
-
March 24 2010, by Michael Wetter:
First implementation.
