AixLib.Fluid.Actuators.Valves.ExpansionValves.Utilities.FlowCoefficient.PolynomialFlowCoefficient

# .AixLib.Fluid.Actuators.Valves.ExpansionValves.Utilities.FlowCoefficient.PolynomialFlowCoefficient

Model describing flow coefficient based on polynomial approach

## Information

This model contains calculation procedures for flow coefficients (for more information, please check out AixLib.Fluid.Actuators.Valves.ExpansionValves.BaseClasses.PartialExpansionValve). The calculation procedures based on a polynomial approach and are presented below.

#### Implemented approaches

Actually, two polynomial approaches are implemented in this package. To add further calculation procedures, just add its name in AixLib.Fluid.Actuators.Valves.ExpansionValves.Utilities.Choices and expand the `if-structure`.

"Polynomial approaches" border="1" cellspacing="0" cellpadding="2" style="border-collapse:collapse;">

Reference | Formula | Refrigerants | Validity `Tcondensing` | Validity `Tevaporating` | Validity `Tsubcooling`
--- | --- | --- | --- | --- | ---
ShanweiEtAl2005 | `C = a1*A + a2*ρinlet + a3*ρoutlet + a4*Tsubcooling + a5*dclearance + a6*(pinlet- poutlet)` | `R22, R407C, R410A` | `40 - 50 °C` | `0 - 10 °C` | `1.5 - 10 °C`
Li2013 | `C = a1 + a2*opening + a3*opening^2 + a4*opening*(Tsubcooling/Tcrit) + a5*(Tsubcooling/Tcrit) + a6*(Tsubcooling/Tcrit)^2` | `R22, R407C, R410A` | `30 - 50 °C` | `0 - 30 °C` | `1.5 - 15 °C`

#### References

M. Shanwei, Z. Chuan, C. Jiangping and C. Zhiujiu. (2005): Experimental research on refrigerant mass flow coefficient of electronic expansion valve. In: Applied Thermal Engineering 25(14), S. 2351–2366

Li, W. (2013): Simplified modeling analysis ofmass flow characteristics in electronic expansion valve. In: Applied Thermal Engineering 53(1), S. 8–12

## Revisions

- October 16, 2017, by Mirko Engelpracht, Christian Vering:
  First implementation (see issue 457).

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