.Buildings.Fluid.HeatExchangers.CoolingTowers.BaseClasses.Characteristics.normalizedPower

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

r_P = s(r_V, d),

where r_P; is the normalized fan power consumption, r_V 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.

Interface

function normalizedPower
  extends Modelica.Icons.Function;
  input Characteristics.fan per "Fan relative power consumption";
  input Real r_V(unit = "1") "Volumetric flow rate divided by nominal flow rate";
  input Real d[:] "Derivatives at support points for spline interpolation";
  output Modelica.Units.SI.Efficiency r_P(max = 1) "Normalized power consumption";
end normalizedPower;

Revisions

• 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 using eta to r_P.
  This is for issue 522.
• September 28, 2011, by Michael Wetter:
  First implementation.