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  • Air Cooled Heat Exchangers
  • Air Cooled Heat Exchangers

Air Cooled Heat Exchangers are one of the heat exchanger types frequently used in Process, Power, Steel, and several other Industries where a process system generates heat that must be removed, for which there is no local use. The main function of the Air Cooled Heat exchanger is the direct cooling of various process mediums by atmospheric air.

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Product Description

Air Cooled Heat Exchangers are one of the heat exchanger types frequently used in Process, Power, Steel, and several other Industries where a process system generates heat that must be removed, for which there is no local use. The main function of the Air Cooled Heat exchanger is the direct cooling of various process mediums by atmospheric air. 

As compared to cooling towers and shell and tube heat exchangers, Air Coolers are a “green” solution. They do not require an auxiliary water supply because of the lost water due to drift and evaporation. Where there is no utility such as water available as a cooling medium.




They are usually used when the outlet temperature is more than about 20 deg. F above the maximum expected ambient air temperature. They can be used with closer approach temperatures, but often become expensive compared to a combination of a cooling tower and a water-cooled exchanger. 


Model Heat exchange
(kw)
Surface
(m²)
Fan Intake-tube
(mm)
Drainpipe
(mm)
Qty Dia
(mm)
Air volume
(m³/h)
Power
(W)
Power supply
FNHC-25-3 6.6 25 1 400 3400 180 380V
3PH
50HZ
19 16
FNHC-35-4 9.1 35 1 450 4800 250 19 16
FNHC-41-5 10.8 41 1 500 6500 450 22 19
FNHC-55-8 14.5 55 1 550 87000 600 25 19
FNHC-80-10 21.0 80 2 500 13000 2x450 28 22
FNHC-110-115 28.8 110 2 550 17400 2X600 32 22


Typically air-cooled exchangers consist of a finned tube bundle with rectangular box Headers on both ends of the tubes.
Cooling air is provided by one or more fans.
Usually, air blows upwards through a horizontal tube bundle.
The fans can be either forced or induced draft depending on whether the air is pushed or pulled through the tube bundle.
The space between the fans and the tube bundle is enclosed by a plenum chamber that directs the air. The whole assembly is usually mounted on legs or a pipe rack.


Components of an Air Cooled Heat Exchanger
An Air Cooled Heat Exchanger consists of the following primary components:

One or more bundles of the heat transfer surface.
A fan or blower that moves the air.
A mechanical driver and power transmission for running the fan or blower.
A plenum
A supporting structure
Header and Fan maintenance platforms.
Optional louvers and recirculation ducts
Optional variable-pitch fan hub or variable-frequency drive for temperature control and power savings.


The most evident advantages of air-cooled heat exchangers are :

• No problem arising from thermal and chemical pollution of cooling fluids
• Flexibility for any plant location and plot plan arrangement(installation over other units)
• Reduction of maintenance costs
• Easy installation by bolted assembly
• Lower environmental impact than shell and tube heat exchangers thanks to the elimination of an auxiliary water supply.


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