Air Cooled Heat Exchanger

King Saud University College engineering

Chemical department

Air-Cooled heat Exchanger

Name: Mohammed Othman Al-zahrani ID:426104592 Dr. Malek

INTRODUCTION: Many industrial facilities are required to meet stringent noise requirements. These requirements are imposed to protect workers’ hearing and/or to meet community ordinances. The facility designer must pay careful attention to the noise level of all industrial equipment, including air-cooled heat exchangers. Measurements for community noise requirements are made at the plant boundary or nearest residence in the far field of the heat exchanger. The far field is defined as the region where there is a linear relationship between the sound pressure level measured and the distance from the noise source.

Why use an air-cooled heat exchanger?

Air-cooled heat exchangers are generally used where a process

system generates heat which must be removed, but for which there

is no local use. A good example is the radiator in your car. The

engine components must be cooled to keep them from overheating

due to friction and the combustion process. The excess heat is

carried away by the water/glycol coolant mixture. A small amount of

the excess heat may be used by the car's radiator to heat the

interior. Most of the heat must be dissipated somehow. One of the

simplest ways is to use the ambient air. Air-cooled heat exchangers

(often simply called air-coolers) do not require any cooling water

from a cooling tower. 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

Air Cooled Heat Exchangers

Carbon Steel & Stainless Steel Tube bundles assembled for shop

run test

Air Cooled Heat Exchanger

installed in the Kerosene

Recovery Unit at Hazira,

India

Materials of Construction:-

1) Carbon steel with or without NACE

requirement and/or HIC testing.

2) Chromium molybdenum (chrome-moly) alloy

steel.

3) Stainless steel alloys.

4) Duplex stainless steel alloys.

5) Incolloy material

:Operation

Fine control of process outlet temperature

is achieved by the individual or combination

of the following methods of control.

1) Auto variation of fan blade angle.

2) Auto variation of louver blade angle.

3) Variable speed drive system for fan

speed control

Finned Tube Details

FE Tube XE Tube L Tube

K Tube G-Fin Tube FE Tube

Welded Header

Screw – Bolted Header

with Cover

Studded Header with

Cover

Plug- Type Header

Reference:

1) process heat transfer

-G.F Hewitt

-G.L Shires

-T.R.Bott

2)Rules of Thumb

-Carl .B

3) heat Exchanger

The end