.IBPSA.Fluid.Geothermal.Borefields.BaseClasses.HeatTransfer.LoadAggregation.temperatureResponseMatrix

Information

This function uses the parameters required to calculate the borefield's thermal response to build a SHA1-encrypted string unique to the borefield in question. Then, if the forceGFunCalc input is true or if there is no .mat file with the SHA1 hash as its filename in the tmp/temperatureResponseMatrix folder, the thermal response will be calculated and written as a .mat file. Otherwise, the thermal response will simply be read from the .mat file. In the .mat file, the data is saved in a matrix with the name TStep, where the first column is the time (in seconds) and the second column is the temperature step response, which is the g-function divided by 2 π H k_soi, with H being the borehole length and k_soi being the thermal conductivity of the soil.

Interface

function temperatureResponseMatrix
  extends Modelica.Icons.Function;
  input Integer nBor "Number of boreholes";
  input Real cooBor[nBor, 2] "Borehole coordinates";
  input Modelica.SIunits.Height hBor "Borehole length";
  input Modelica.SIunits.Height dBor "Borehole buried depth";
  input Modelica.SIunits.Radius rBor "Borehole radius";
  input Modelica.SIunits.ThermalDiffusivity aSoi "Thermal diffusivity of soil";
  input Modelica.SIunits.ThermalConductivity kSoi "Thermal conductivity of soil";
  input Integer nSeg "Number of line source segments per borehole";
  input Integer nTimSho "Number of time steps in short time region";
  input Integer nTimLon "Number of time steps in long time region";
  input Integer nTimTot "Number of g-function points";
  input Real ttsMax "Maximum non-dimensional time for g-function calculation";
  input String sha "SHA-1 encryption of the g-function arguments";
  input Boolean forceGFunCalc "Set to true to force the thermal response to be calculated at the start";
  output Modelica.SIunits.ThermalResistance TStep[nTimTot, 2] "Temperature step-response time series";
end temperatureResponseMatrix;

Revisions

• August 27, 2018, by Michael Wetter:
  Changed name of temporary directory so that it is clear for users that this is a temporary directory.
• July 15, 2018, by Michael Wetter:
  Changed implementation to use matrix read and write from the Modelica Standard Library.
• March 5, 2018, by Alex Laferrière:
  First implementation.