.Buildings.Applications.DataCenters.ChillerCooled.Controls.CoolingTowerSpeed

Information

This model describes a simple cooling tower speed controller for a chilled water system with integrated waterside economizers.

The control logics are described in the following:

• When the system is in Fully Mechanical Cooling (FMC) mode, the cooling tower fan speed is controlled to maintain the condener water supply temperature (CWST) at or around the setpoint.
• When the system is in Partially Mechanical Cooling (PMC) mode, the cooling tower fan speed is set as 100% to make condenser water as cold as possible and maximize the waterside economzier output.
• When the system is in Free Cooling (FC) mode, the cooling tower fan speed is controlled to maintain the chilled water supply temperature (CHWST) at or around its setpoint.

Revisions

• July 30, 2017, by Yangyang Fu:
  First implementation.