.Buildings.Fluid.HeatExchangers.CoolingTowers.FixedApproach

Information

Model for a steady-state or dynamic cooling tower with constant approach temperature. The approach temperature is the difference between the leaving water temperature and the entering air temperature. The entering air temperature is used from the signal TAir. If connected to the a dry-bulb temperature, then a dry cooling tower is modeled. If connected to a wet-bulb temperature, then a wet cooling tower is modeled.

By connecting a signal that contains either the dry-bulb or the wet-bulb temperature, this model can be used to estimate the water return temperature from a cooling tower. For a more detailed model, use for example the YorkCalc model.

Revisions

• January 16, 2020, by Michael Wetter:
  Refactored model to avoid mixing textual equations and connect statements.
• July 12, 2011, by Michael Wetter:
  Introduced common base class for Buildings.Fluid.HeatExchangers.CoolingTowers.YorkCalc and Buildings.Fluid.HeatExchangers.CoolingTowers.FixedApproach so that they can be used as replaceable models.
• May 12, 2011, by Michael Wetter:
  Added binding equations for Q_flow and mXi_flow.
• March 8, 2011, by Michael Wetter:
  Removed base class and unused variables.
• April 7, 2009, by Michael Wetter:
  Changed interface to new Modelica.Fluid stream concept.
• May 14, 2008, by Michael Wetter:
  First implementation.