BuildingSystems.Fluid.Geothermal.Borefields.BaseClasses.Boreholes.BaseClasses.InternalHEXOneUTube

# .BuildingSystems.Fluid.Geothermal.Borefields.BaseClasses.Boreholes.BaseClasses.InternalHEXOneUTube

Internal heat exchanger of a borehole for a single U-tube configuration

## Information

Model for the heat transfer between the fluid and within the borehole filling for a single borehole segment. This model computes the dynamic response of the fluid in the tubes, the heat transfer between the fluid and the borehole filling, and the heat storage within the fluid and the borehole filling.

This model computes the different thermal resistances present in a single-U-tube borehole using the method of Bauer et al. (2011) and computing explicitely the fluid-to-ground thermal resistance Rb and the grout-to-grout resistance Ra as defined by Claesson and Hellstrom (2011) using the multipole method.

#### 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.

D. Bauer, W. Heidemann, H. Müller-Steinhagen, and H.-J. G. Diersch. Thermal resistance and capacity models for borehole heat exchangers . International Journal Of Energy Research, 35:312-320, 2011.

## Revisions

- November 22, 2023, by Michael Wetter:
  Corrected use of `getInstanceName()` which was called inside a function which is not allowed.
  This is for IBPSA, #1814.
- March 7, 2022, by Michael Wetter:
  Removed `massDynamics`.
  This is for #1542.
- February 28, 2022, by Massimo Cimmino:
  Removed `printDebug` parameter from call to BuildingSystems.Fluid.Geothermal.Borefields.BaseClasses.Boreholes.BaseClasses.Functions.internalResistancesOneUTube.
  This is for IBPSA, #1582.
- July 10, 2018, by Alex Laferrière:
  Updated documentation following major changes to the BuildingSystems.Fluid.HeatExchangers.Ground package. Additionally, implemented a partial InternalHex model.
- June 18, 2014, by Michael Wetter:
  Added initialization for temperatures and derivatives of `capFil1` and `capFil2` to avoid a warning during translation.
- February 14, 2014, by Michael Wetter:
  Removed unused parameters `B0` and `B1`.
- January 24, 2014, by Michael Wetter:
  Revised implementation, added comments, replaced `HeatTransfer.Windows.BaseClasses.ThermalConductor` with resistance models from the Modelica Standard Library.
- January 23, 2014, by Damien Picard:
  First implementation.

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