.TAeZoSysPro.FluidDynamics.Components.Machines.BaseClasses.PumpCharacteristics.polynomialFlow

Information

polynomialFlow

This function computes the head in meter supplied by a pump at a given volume flow rate V_flow from a polynomial fitting of the pump curve.

The fitting is carried out from nominal inputs of the volume flow rate and the head (V_flow_nominal and head_nominal) via the least squares method. The order of the polynom that fits the curve is settable via the input OrderPolyFitting but cannot go over the third order.

If the input V_flow is out of the range of the input nominal data V_flow_nominal, a linear extrapolation is performed.

If V_flow <= 0 the head remains at head = f(V_flow = 0). This condition is prior to the bullet point above.

If the head computed by the polynom or by the extrapolation combined with the polynom goes bellow 0, the heat is threshold at 0 ( head ⩾ 0).

Interface

function polynomialFlow
  import Modelica.Math.Vectors;
  extends Modelica.Fluid.Machines.BaseClasses.PumpCharacteristics.baseFlow;
  input Modelica.SIunits.VolumeFlowRate V_flow_nominal[:] "Volume flow rate for N operating points (single pump)" annotation(
    Dialog);
  input Modelica.SIunits.Position head_nominal[:] "Pump head for N operating points" annotation(
    Dialog);
  input Integer OrderPolyFitting(max = 3) = 3 "Order of the polynom that fits the fan curve";
end polynomialFlow;

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