BuildingSystems.Fluid.Geothermal.Borefields.BaseClasses.Boreholes.BaseClasses.Functions.multipoleThermalResistances

# .BuildingSystems.Fluid.Geothermal.Borefields.BaseClasses.Boreholes.BaseClasses.Functions.multipoleThermalResistances

Thermal resistances from multipole solution

## Information

This model evaluates the delta-circuit borehole thermal resistances using the multipole method of Claesson and Hellstrom (2011).

#### References

J. Claesson and G. Hellstrom. Multipole method to calculate borehole thermal resistances in a borehole heat exchanger. HVAC&R Research, 17(6): 895-911, 2011.

#### Interface

>     function multipoleThermalResistances
>       extends Modelica.Icons.Function;
>       input Integer nPip "Number of pipes";
>       input Integer J "Number of multipoles";
>       input Modelica.Units.SI.Position xPip[nPip] "x-Coordinates of pipes";
>       input Modelica.Units.SI.Position yPip[nPip] "y-Coordinates of pipes";
>       input Modelica.Units.SI.Radius rBor "Borehole radius";
>       input Modelica.Units.SI.Radius rPip[nPip] "Outter radius of pipes";
>       input Modelica.Units.SI.ThermalConductivity kFil "Thermal conductivity of grouting material";
>       input Modelica.Units.SI.ThermalConductivity kSoi "Thermal conductivity of soil material";
>       input Real RFluPip[nPip](each unit = "(m.K)/W") "Fluid to pipe wall thermal resistances";
>       input Modelica.Units.SI.Temperature TBor = 0 "Average borehole wall temperature";
>       output Real RDelta[nPip, nPip](each unit = "(m.K)/W") "Delta-circuit thermal resistances";
>       output Real R[nPip, nPip](each unit = "(m.K)/W") "Internal thermal resistances";
>     end multipoleThermalResistances;

## Revisions

- February 12, 2018, by Massimo Cimmino:
  First implementation.

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