What is Adiabatic Cooling?

An adiabatic process is a thermodynamic process applied to gasses which occurrs without gain or loss of heat.

It is not applicable to cooling the welding zone and there are NO manufacturers in India or anywhere else.

Let me just add a few words:

Adiabatic process is reversible. there is an adiabatic cooling and adiabatic heating. for example:

Assume you have a vacuum tank divided into 2 compartments, connected by a valve having a very small orifice. You now compress a gas into one of the compartments. This compartment Will heat up proportionally (Almost) to the increase in the gas pressure. (Touch an air-compressor head while it is working, it is hot.) This is Adiabatic heating. You now open the connecting valve and let the pressurized gas flow into the empty half of the tank. Due to the decreasing in it's pressure,and it's very fast expansion in the empty half of he tank, the gas's temperature will fall. this is Adiabatic cooling.

What does it mean In real life,

Adiabatic cooling is used to ignite the fuel in diesel engines. You inject the diesel fuel through fuel injectors, and at the same time elevate the temperature inside the cylinder by compressing air into it, to such a level that by adiabatic heating it reaches the fuel's ignition point. The reverse is occurring in a refrigerator where a pressurised gas is released through a small orifice into a lower pressure area. This time the falling gas temperature due to adiabatic cooling is being used. And BTW, clouds are also form this way.

Hope it helps.

Wangito.

Works the other way around as well just to complete the story a bit further. When a gas compresses so fast that there is no time for energy to transfer outwards, this gas will overheat which accelerates the process even further, think of explosions.

Adiabatics are NOT the easiest of principles to start learning physics with.

Here is what Wilipedia states...

http://en.wikipedia.org/wiki/Adiabatic_cooling