Design Features of Modern Air-cooled Chillers

While manufacturing air cooled chiller it is important to ensure that the maximum amount of air flows through the condenser. At the same time, a high level of heat removal will be ensured. There are several ways to achieve these results.

Initially, all capacitors were made rectangular, and installed vertically. They were attached to the sides of the refrigeration machine itself. With the development of technologies and changes in approaches, this design has been changed and improved. For this, new W-shaped capacitors began to be used, which significantly improved the efficiency.

This solution helped to maximize airflow and provide efficient and fast cooling. The chillers are now more productive, while the energy consumption for the condenser fans has decreased. You should understand that even a 1° C lowering of the condensing temperature improves the efficiency (cooling capacity) of the chiller. This solution results in a 3% increase in energy efficiency while maintaining the same generated refrigeration capacity.

Varieties of air-cooled chillers include:

  • Monoblock axial fans – ready for outdoor installation and cooled by outside air.
  • Monoblock with centrifugal fans – they are mounted inside the building and are ready for cooling with outside air, which comes from the street through the duct network.
  • A chiller with a remote air condenser is to be installed indoors, and the condenser itself is to be installed outdoors.

Fans for Air-cooled Condensers

A fan is used to drive the outside air through a condenser. Often, it must be installed on top of the refrigeration unit: air is drawn in from the sides of the chiller, then passes through the condenser, thereby cooling it, after which it is thrown back into the street strictly vertically upwards.

In addition, manufacturers pay much attention to the fans. They are represented by the second largest energy consumers only after the compressor and possibly the pump.