modelSpeedControlled_y_linear
Pump with linear characteristic for pressure vs. flow rate
Extends from Modelica.Icons.Example (Icon for runnable examples).
Information
This example demonstrates and tests the use of a flow machine whose speed is reduced to zero. In the top model, the pressure drop across the pump is constant, and in the bottom model, the mass flow rate across the pump is constant. In the top model, a small flow resistance has been added since a pump with zero speed cannot produce a non-zero pressure raise. For this operating region, the pressure drop ensures that the model is non-singular.
The fans have been configured as steady-state models. This ensures that the actual speed is equal to the input signal.
Parameters
| Type | Name | Default | Description |
|---|---|---|---|
| Modelica.Units.SI.MassFlowRate | m_flow_nominal | 0.5 | Nominal mass flow rate |
| Modelica.Units.SI.PressureDifference | dp_nominal | 10000 | Nominal pressure |
Components
| Type | Name | Default | Description |
|---|---|---|---|
| Modelica.Blocks.Sources.Ramp | y | Input signal | |
| Buildings.Fluid.Sources.Boundary_pT | sou | ||
| Buildings.Fluid.Movers.SpeedControlled_y | pumFixDp | Pump with fixed pressure raise | |
| Buildings.Fluid.Sources.Boundary_pT | sou1 | ||
| Buildings.Fluid.FixedResistances.PressureDrop | dp1 | Pressure drop | |
| Buildings.Fluid.Sources.MassFlowSource_T | sou2 | ||
| Buildings.Fluid.Movers.SpeedControlled_y | pumFixM_flow | Pump with fixed mass flow rate | |
| Buildings.Fluid.Sources.Boundary_pT | sou3 |
Contents
| Name | Description |
|---|---|
 Medium | Medium model |
Revisions
- February 20, 2016, by Ruben Baetens:
Removal ofdynamicBalanceas parameter formassDynamicsandenergyDynamics. -
January 22, 2016, by Michael Wetter:
Corrected type declaration of pressure difference. This is for #404. -
February 14, 2012, by Michael Wetter:
Added filter for start-up and shut-down transient. -
March 24 2010, by Michael Wetter:
First implementation.