.AixLib.BoundaryConditions.GroundTemperature.Options

Information

• a constant value
• a sine curve (yearly)
• a table stored in a file
• a simple model (called Kusuda here) that was originally created for use with district heating grids or LTN in order to model thermal pipe losses

Assumption and limitations

The model does not model any influence on the ground temperature. The ground temperature is only dependent on the set parameters.

Typical use and important parameters

The model is used as a boundary condition for ROM model floors outside surfaces.

Differently then stated in the parameter description below for Kusuda, α needs to be declared in m2/day! (The Modelica SI unit diffusivity does not support m2/day as a display unit.)

A typical value for α is bewteen 0.03 and 0.05 m2/day.

Revisions

• April 23, 2023, by Philip Groesdonk:
  First implementation (see issue 1080).