david 
There are many types of air compressors and the air compressor is a machine that does power conversion by the use of gasoline or electric motor and the air which is compressed may be used in many ways including kinetic energy when there is depressurization of the air from the tank and if the pressure in the tank reaches its lowest limit the air compression turns on to bring in more pressure and it will fill the tank with pressure until it gets to the limit when it shuts down again.
There is a difference between the air pump and the air compressor in that the air pump pumps the air from one location to another location such as an aquarium or mattress which is inflatable and air pumps do not have any tanks that may store the air and they are quiet and slow but they are not more costly to buy and they are also easy to operate.
There are many air compressors which use the piston where the air is pumped to a chamber by using the pistons which move in motions and the rotary screw method where there are two helical screws which are the same and these guides the air to the chamber and the volume of the air decreases when the screw turns.
Some air compressors have axial and centrifugal compressors where the component that rotates provides some kinetic energy which is then turned to pressure energy and they utilize the force from the centrifugal and spins it by using an impeller which decelerates and accelerates the air which brings air pressure.
Sinceadiabatic heat may be there, the air compressors need some ways to get rid of the heat which comes as waste and this is why there are some compressors which use water or air to cool their components even though the rotary kinds are cooled by oil but it is important to note that the cooling also depends on the changes in the atmosphere while cooling off.
There are many ways such as moderate pressure for the use in big industries to oxidize petroleum for cooking, jackhammers, divers, gas cylinders, filling the high pressure tanks, filling up tires and many more use which air compressors help in doing.
To be sure that all kinds of compressors work well it is important to make sure that they do not leak, by maintaining them properly and checking for air or oil leaks, ensuring the pressure is right and making sure that the operations of the compressors are done safely and that the temperature are not too high because of overheating.
