Lack of proper air distribution
Air coolers are one of the devices used in most refinery and petrochemical units to
reduce fluid
temperature.
Air Cooler is a heat exchanger that can transfer the excess heat of fluid to the air to
reduce its
temperature to the required level. The air with the environment temperature hits the hot
fluid tubes
in air coolers. It causes the temperature of the tube wall to decrease, thus reducing
the temperature
of the fluid inside the tube.
One of the crucial issues in air coolers is the fan-bay area ratio. This ratio is called
converge fan,
and its value in air cooler exchangers should not be smaller than 0.4.
The fan is responsible for creating the airflow, which air is the cooling fluid in the
air cooler.
The fans' dimensions in industrial air coolers range from 1 to 8 m and usually have 0 to
14 fins.
For the air cooler efficiency to reach maximum efficiency, the fan must cover the entire
surface of
the bundled tube.
In addition, the fin's angle dramatically affects its performance, and some fans can
adjust the fins.
In this type of exchanger, the tubes are placed in the upper part of the
fan. In this way, as a result
of the heating of the input air, natural air suction takes place at the top
of the tubes.
Therefore, the power consumption of the fan will be less. In addition, these
types of exchangers
are more compatible in cold regions. On the other hand, because the tubes
are exposed to the sun,
rain, and hail; as a result, they have more depreciation.
Among the disadvantages of this type of exchanger, we can mention the lack
of proper air
distribution between the tubes and the possibility of hot air returning due
to the low speed of the air exiting from the tubes .
Low power consumption
More adaptability in cold regions
Lack of proper air distribution
The fan is placed on top of the tubes in this exchanger. The air is
appropriately distributed in
different parts around the tubes. The possibility of hot air returning to
the ventilation part of the
fan is less. The tubes are not exposed to rain and sunlight due to the
effect of natural flow in the
system.
Among the disadvantages of this type of exchanger, it can be pointed out
that more power
is required because the fan is exposed to the hot air passing through the
tubes. Another
disadvantage of this exchanger type is less access to repair the fan parts.
The temperature of the output hot air of the tubes should be limited to
about f200 because there is
a possibility of damaging the fins, bearing, belt, and other fan parts in
the hot air flow.
Proper distribution of air in different parts of the tube
More consumption power
The temperature of the output air must be controlled
Less access to fan repairs
IRUS Energy Co. has produced and manufactured the most standard equipment related to minirefinery by using an experienced and expert workforce and the most advanced equipment. One of these products is an Air Cooler .
