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          HVAC control

          Regulate cooling-tower water temperature and save energy


          Main drivers

          “My cooling tower is a constant concern. Maintenance needs vary widely depending on the season, and the installation uses too much energy. I want a solution that will improve yield and reduce costs.”

          Solution in brief

          Use speed drives to regulate the tower’s fan and pump

          Solution applicable to medium-sized to large buildings with cooling tower

          The best way to control air-water exchange in a cooling tower is to use variable speed drives to control  the tower’s fan and pump, eliminating additional maintenance-hungry mechanical systems while  meeting the tower’s needs. A PLC regulates fan airflow and pump volume via the variable speed drives.

          This solution uses up to 50% less energy than direct-start fans and pumps and eases maintenance. Over a given season, the fan and pump motors must operate at full speed just 2% to 5% of the time—the rest of the time this energy is wasted. Direct-start motors require additional mechanical systems to solve problems like fan blade rotation due to wind, or additional resistance due to freezing.

          This solution uses 20% less energy than two-speed motors and also improves maintenance. While two-speed motors offer a partial solution to energy consumption issues, they do nothing to resolve maintenance issues.

          Benefits for end users

          > Reduce energy consumption
          > Improve yield by regulating water temperature
          > Lower maintenance requirements, especially in extreme weather
          > Quieter operation
          > Low harmonics: THDI < 30%
          > Eliminates inrush current due to motor start-up

          Benefits for professionals

          + Simpler mechanics (no brakes, sensors, or rotation inverters)
          + Facilitates motor sizing (over-speed and standby modes available)
          + Enhanced process regulation
          + Extends lifetime of mechanical components
          + Facilitates maintenance planning



          To know more

          To know more 

          Additional support

          Contact Schneider Electric
          For additional help or to contact us, visit customer services