functionlmtd

Log-mean temperature difference

Information

This function computes the log mean temperature difference of a heat exchanger.

Note that the implementation requires the temperature differences Ta1 - Tb2 and Tb1 - Ta2 to be not equal to each other.

Inputs

TypeNameDefaultDescription
Modelica.Units.SI.TemperatureT_a1Temperature at port a1
Modelica.Units.SI.TemperatureT_b1Temperature at port b1
Modelica.Units.SI.TemperatureT_a2Temperature at port a2
Modelica.Units.SI.TemperatureT_b2Temperature at port b2

Outputs

TypeNameDefaultDescription
Modelica.Units.SI.TemperatureDifferencelmtdLog-mean temperature difference

Revisions

  • November 30, 2020, by Michael Wetter:
    Updated documentation.
    This is for Buildings, #2268.
  • May 28, 2010, by Michael Wetter:
    First implementation.