About

• Two separate fluid circuits:A closed-circuit tower has two distinct circuits.
  • Primary circuit:This is a closed loop that contains the process fluid (e.g., water, or water and glycol) and circulates it inside a tube bundle or coil.
  • Secondary circuit:This is an external, open circuit where recirculating water is sprayed over the outside of the coils.
• Heat transfer:Heat from the primary process fluid is transferred through the coil walls to the secondary spray water.
• Evaporative cooling:Fans draw air through the spray water, causing some of it to evaporate. This evaporation removes heat from the water, which in turn cools the coils and the process fluid inside them.
• Contamination prevention:The process fluid never comes into contact with the air or the external spray water, preventing contamination and allowing for additives like glycol to be used without leaving residue in the system.

• Keeps fluid clean:The primary fluid remains pure, which is essential for processes like food production or when it's critical to maintain its chemical and physical characteristics.
• Reduces freezing risk:Adding antifreeze (glycol) to the process fluid is possible, making it suitable for cold climates.
• Simpler system:It can be a more efficient and simpler alternative to a system using an open cooling tower and a separate heat exchanger.
• High efficiency:Closed-loop systems can be highly efficient, especially when designed to work with a hybrid system that can switch between wet and dry cooling modes.