Air-Cooled Furnace System | Dry Coolers Inc.

Dry Coolers Inc.

Industrial Process Cooling Systems

Dry Coolers, Inc.
575 South Glaspie Street
Oxford, MI 48371 USA


Air-Cooled Furnace System

3D Rendering of a sample Air-Cooled Vacuum Furnace System

 Our Air-Cooled Vacuum furnace cooling system utilize the Aqua-Vent Air Cooled Heat Exchanger in combination with the CLEANLOOP Pump Station technology to reject heat from the furnace directly into the ambient air.

With the correct inhibited glycol/water concentration, our system will virtually eliminate scale buildup and corrosion in your furnace.

The attached diagram illustrates the principle of operation of the air-cooled system.

Air Cooled System PID Example

Coolant is pumped from a sealed reservoir through the air cooled heat exchanger that use high efficiency propeller fans to draw air over a large finned tube radiator. Heat is rejected to the atmosphere. From the air-coolers, the coolant is supplied to the vacuum furnace and returned to the reservoir, completing the closed loop. The system is sized to supply coolant (typically ethylene or propylene glycol) to the furnace at a temperature that is within 10°F of ambient air. It is very important to utilize the correct concentration of glycol for freeze-protection.

Advantages Over An Evaporative System

  • Requires no makeup water
  • Requires no chemical treatment
  • Eliminates the need for continuous water “blowdown”
  • Low maintenance over the life of the equipment.
  • Very energy efficient, especially in the cooler months when only a couple of fans are needed to cool your furnaces!
  • Smaller indoor footprint for the CLEANLOOP pump station

Disadvantages Compared To An Evaporative System

  • Requires a one-time charge of glycol for freeze and corrosion protection, which can be relatively expensive in large systems
  • Generally requires a larger outdoor footprint for the Aqua-Vent air coolers relative to the equivalent sized evaporative cooling tower
  • Will typically operate 10-15 deg F (5-8 deg C) warmer during the summer than the equivalent evaporative type system