BuildSysPro.IBPSA.Fluid.Movers.BaseClasses.Euler.efficiency

# .BuildSysPro.IBPSA.Fluid.Movers.BaseClasses.Euler.efficiency

Computes efficiency with the Euler number correlation

## Information

This function uses the correlation of Euler number to compute the efficiency η.

#### Interface

>     function efficiency
>       extends Modelica.Icons.Function;
>       input IBPSA.Fluid.Movers.BaseClasses.Euler.peak peak "Operation point with maximum efficiency";
>       input Modelica.Units.SI.PressureDifference dp "Pressure rise";
>       input Modelica.Units.SI.VolumeFlowRate V_flow "Volumetric flow rate";
>       input Real V_flow_dp_small(final unit = "m3.Pa/s", min = Modelica.Constants.eps) "Small number for regularisation";
>       output Modelica.Units.SI.Efficiency eta "Efficiency";
>     end efficiency;

## Revisions

- December 12, 2022, by Hongxiang Fu:
  First implementation. This is for #2668.

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