Vapor Absorption Machines And Its Different Types

By Author: Arush Keerthi
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Vapor absorption machine or VAM can be fuel driven or hot water driven. It is used to absorb vapour as the name suggests and is applicable in restaurants, hotels, offices, malls, colleges and schools, factories and certain industries. In case of fuel driven VAMs, there is no hot water or steam produced, it is directly fired.

They can be categorised into steam driven machine, fuel driven machine, hot water driven, exhaust type machines, ammonia type machines, super large type etc.

A steam driven type: This steam driven type can be found in two types such as single effect and double effect. Double effect occurs at two levels unlike a single effect in which there is only one generator. In case of double effect it involves both a primary generator and a secondary generator to achieve the vapour absorption.

Exhaust type: This makes use of waste heat in the form of engine exhaust. This also allows for direct cooling thus saves on air conditioning costs. It also minimises the initial capital cost and there are no additional power units needed.

Hot water type: These are used for industrial purpose, for cooling ...
... and air conditioning. This application of machines fired with hot water is seen in air cooling of gas turbines and DG.

Fuel driven machines: These fuel driven machines have a slot for adding fuel and variety of liquid which is fired to generate the cooling process by absorbing vapour in the surroundings.

Super large types: This has a greater scope and it makes use of various heat sources such as hot water, steam, exhaust and fuel either separately or in combination of heat sources. The name super large suggests that it is used for larger cooling area. This may be used in industries for a larger area and district cooling too. Modern advancement has led to the invention of these super large machines.

It is said that the super large vapour absorption machine is especially designed to address large cooling needs arising from rapid growth, urbanisation and district cooling. The unique design of these machines are based on the Twin shell concept.

Vapour compression chillers compose the four major aspects of the vapour compression refrigeration cycle, meaning that they have a compressor, an evaporator, a condenser, and a metering device. A chiller can cool a very large building or complex, and can make use of cooling towers to increase their effectiveness. You can choose a particular VAM or Vapour Absorption Machines as per your personal needs.

Arush Keerthi, Expert author. Information on Electro mechanical projects: Electro Mechanical ProjectsGet more information on: Vapour Absorption Machines