modelBorefield

Geothermal borefield model

Extends from Buildings.Fluid.Geothermal.Borefields.TwoUTubes.

Information

This model represents a borefield composed of 350 boreholes, with the following main assumptions.

  • The soil is made of sandstone.
  • The boreholes are filled with a bentonite grout.
  • The boreholes have a height of 300 m and a diameter of 190 mm. They are discretized vertically in five segments.
  • A distance of 10 m between each borehole is considered.
  • HDPE pipes with a diameter of 40 mm are considered, in a double U-tube parallel configuration.

Parameters

TypeNameDefaultDescription
IntegernBorborFieDat.conDat.nBorNumber of boreholes
RealdxyBor10Distance between boreholes
Modelica.Units.SI.Length[nBor,2]cooBor{dxyBor*{mod(i - 1, 10), floor((i - 1)/10)} for i in 1:nBor}Cartesian coordinates of the boreholes in meters

Components

TypeNameDefaultDescription
Buildings.Controls.OBC.CDL.Interfaces.RealOutputQ_flowRate at which heat is extracted from soil

Revisions

  • May 17, 2024, by Michael Wetter:
    Updated model due to removal of parameter dynFil.
    This is for IBPSA, #1885.
  • January 8, 2024, by David Blum:
    Moved to Buildings.DHC.Examples.Combined.BaseClasses.Borefield. This is for issue 3628.
  • May 31, 2023, by Michael Wetter:
    Removed final modifier for borFieDat to allow record to be replaced in models that extend this model.
  • February 23, 2021, by Antoine Gautier:
    Updated documentation.
  • January 12, 2020, by Michael Wetter:
    Added documentation.