HVAC

Control Cooling Tower Fans by Sensing Ambient Wet Bulb Temperature

Control cooling tower fans by sensing ambient wet bulb (wb) temperature. Adjust the set point for an approach of about 2°F (controller will measure outside wb and adjust set point to 2°F warmer). A word of caution: Don't try this tip with old inefficient towers. The increase in fan kw will eat up chiller efficiency gains.