Chemical Engineering

Air-Cooled Heat Exchangers

Jim Stone

Stone Process Equipment Co.

Purpose
The purpose of this composition is to provide some general information on supply raise up exchangers and answer some of the commonly heard questions. This is a mixture of fact and opinion. Wherever the opinion is obvious to me, I have attempted to show it by use of italics.
why use an snap-cooled change exchanger?
Air-cooled heat exchangers are generally used where a process dust 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 crash and the combustion process. The excess heat is carried away by the wet/glycol coolant mixture. A small amount of the excess heat may be used by the cars radiator to heat the interior. close to of the heat must be dissipated somehow. One of the simplest shipway 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 to a greater extent than about 20 deg. F above the maximum expect ambient air temperature.



They move be used with nigher approach temperatures, but often become expensive compared to a combination of a cooling tower and a cool exchanger.
How are they constructed?
Typically, an air-cooled exchanger for process use consists of a finned-tube bundle with rectangular box headers on both ends of the tubes. engine cooling system air is provided by one or more fans. Usually, the 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 amongst the fan(s) and the tube bundle is enclosed by a plenum sleeping room which directs the air. The whole assembly is usually mounted on legs or a piperack.
The fans are usually driven be electrical motors through some type of speed reducer....If you want to array a full essay, order it on our website: Orderessay



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