This model represents a pump or fan which includes already a controller. Be aware that this model does not only represent the physical behavior of an HVAC component but also controls this HVAC component.
In addition to the standard characteristic curve (should equal per.pressure), the controller is able to store two further characteristic/control curves. This enables the user to quickly select between the two common control modes constant pressure (dpConst) and variable pressure (dpVar). The common control modes of pumps are concisely explained in the referenced white paper [1].
Often, the AixLib.Fluid.Movers.FlowControlled_dp. This means no speed control is possible. Please use AixLib.Fluid.Movers.SpeedControlled_y for this application.
The model has a standard parametrization for the three curves basing on the parameter m_flow_nominal and dp_nominal. See the figure and table below.
|
m_flow |
dp_total |
dp_constCtrl |
dp_varCtrl |
|
0 |
1.3 |
1 |
0.5 |
|
1 |
1 |
1 |
1 |
|
1.5 |
0.75 |
0.75 |
0.75 |
|
2 |
0 |
0 |
0 |
[1] Robinson, Reece. 2019. Pumping Control Methods and Their Impact on System Effciency. Link to PDF.