.Buildings.Fluid.HeatExchangers.CoolingTowers.Validation.MerkelEnergyPlus

Information

This model validates the model Buildings.Fluid.HeatExchangers.CoolingTowers.Merkel by comparing against results obtained from EnergyPlus.

The EnergyPlus results were obtained using the example file CoolingTower:VariableSpeed, with the cooling tower evaluated as the CoolingTower:VariableSpeed:Merkel model from EnergyPlus.

The difference in results of the cooling tower's leaving water temperature (tow.TLvg and TLvg.EP) during the middle and end of the simulation is because the mass flow rate is zero. For zero mass flow rate, EnergyPlus assumes a steady state condition, whereas the Modelica model is a dynamic model and hence the properties at the outlet are equal to the state variables of the model.

Contents

Name	Description
MediumAir	Air medium model
MediumWat	Water medium model

Revisions

• April 30, 2025, by Kathryn Hinkelman:
  Corrected the wetbulb value TAirInWB_nominal and added intermediate equations from E+ to model.
  This is for #4189.
• December 23, 2019, by Kathryn Hinkelman:
  First implementation.