functionnormalizedPower
Normalized flow vs. normalized power characteristics for fan
Extends from Modelica.Icons.Function (Icon for functions).
Information
This function computes the fan normalized power consumption for a given normalized volume flow rate and performance data. The fan normalized power consumption is
rP = s(rV, d),
where rP; is the normalized fan power consumption, rV is the normalized volume flow rate, and d are performance data for fan or pump efficiency.
Implementation
The function s(·, ·) is a cubic hermite spline. If the data d define a monotone decreasing sequence, then s(·, d) is a monotone decreasing function.
Inputs
| Type | Name | Default | Description |
|---|---|---|---|
| Characteristics.fan | per | Fan relative power consumption | |
| Real | r_V | Volumetric flow rate divided by nominal flow rate | |
| Real[:] | d | Derivatives at support points for spline interpolation |
Outputs
| Type | Name | Default | Description |
|---|---|---|---|
| Modelica.Units.SI.Efficiency | r_P | Normalized power consumption |
Revisions
-
August 3, 2026, by Michael Wetter:
Removed duplicate annotation. This is for IBPSA, issue 2158. -
December, 22, 2019, by Kathryn Hinkelman:
Corrected cubic hermite spline calculation.
This is for issue 1691. -
June 4, 2016, by Michael Wetter:
Change function from usingetator_P.
This is for issue 522. -
September 28, 2011, by Michael Wetter:
First implementation.