Light and efficient Searle NF Air Cooled Condensers by GEA Heat Exchangers

By Silvia Scaldaferri, Jan 21, 2014, 14:56 2 minute reading

The Searle NF range of GEA Heat Exchangers’ air-cooled condensers has been designed to use ammonia as the working fluid, offering a duty range of 11 kW to 1270 kW and featuring heat exchanger tubes and headers made of stainless steel. Furthermore, due to smaller tube diameters NF range condensers are lighter weight than standard ammonia condensers.

Ammonia (NH3) is experiencing strong interest among manufacturers and end users as a refrigerant due to its environmental credentials, such as no global warming potential and a zero ozone depletion factor. This renewed interest in NH3 encouraged GEA Heat Exchangers to introduce a new range of Searle condensers designed for use with ammonia. The new Searle NF range of air cooled condensers features a new design for lighter weight thanks to smaller tube diameters, lower costs and a smaller refrigerant charge.

Duty range up to 1270kW

The Searle NF air cooled condensers have a duty range of from 11kW to 1270kW, making them suitable for a wide range of applications. They are available with all RF options such as EC fan technology, adiabatic spray systems and the well-known GEA Searle controls package.

Stainless steel coil

In addition the new Searle NF air cooled condenser has a stainless steel coil tube and stainless steel header tube, specified because of its compatibility with ammonia.

Optimal heat exchanger efficiency

The Searle ‘T-Fin’ configuration includes 12mm tube on an equilateral spacing that balances tube diameter and useful surface to achieve optimal heat exchanger efficiency for this tube diameter. Fin enhancements such as flat top corrugation and GEA Heat Exchangers’ ‘turbulator’ ensure that a minimal amount of material is required to achieve a given capacity.

Searle NF features

The main features of the Searle NF range air cooled condensers are as follows:

  • Up to 12m long unit construction
  • Coil supports replaced with center plates for ‘H’ frame construction
  • Interlocking side plate construction cold form to create ‘I’ frame structure for strength
  • Easy to assemble due to reduced number of components
  • Structural integrity maintained throughout the entire Condenser range
  • High grade stainless steel coil block and header tubes

About the Searle brand

The brand Searle is a market leader in the field of air-side heat exchange and air conditioning industries. The product range from evaporators suitable for small reach-in refrigerated cabinets through to evaporators applied in large cold stores.

About GEA Heat Exchangers

GEA Heat Exchangers is a segment within the internationally active GEA Group. The segment consolidates all the activities in the area of heat exchangers and comes with probably the largest portfolio in this field worldwide. With GEA plate heat exchangers, shell and tube heat exchangers, air-cooled heat exchangers, air filter systems, wet cooling towers and dry cooling systems and synthetic fillings, as well as air treatment systems for numerous areas of application, GEA Heat Exchangers gives comprehensive coverage of the spectrum. Customers in the global markets for power, oil and gas, chemicals, marine, climate and environment, water and waste water treatment and food, profit from the highest standard of efficiency, safety and sustainability.


By Silvia Scaldaferri

Jan 21, 2014, 14:56

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