The main reason for the popularity of these air compressors is because air is a safe, clean, convenient and flexible resource. These machines have undergone a series of transformations to become highly reliable equipment. They are almost indispensable in much of their applications. Compressors come in a wide range of varieties of different sizes and types. Ultimately, just like any other tool, compressors and tools are typically lighter and more powerful than standard battery powered cordless tools or standard electrical tools. They are used in almost all industrial sectors from textiles to dairy farming to automobiles to aircraft. While there are multiple compressor types, they all have same functions which are increasing the pressure and reducing the volume of any given air or gas. Majority of compressors operate on the principle of filling the chamber with gas or air and reducing the volume in the chamber. They are referred to as positive displacement compressors.
A set of equipment was used in this experiment. These included the two-stage compressor, the piston, a separate dynamometer, analogue meters, the two industrial compressors, the air receiver and the intercooler which is located between the first and second stages. In this experiment these set of equipment were connected together to make up a two-stage compressor. In this case, there two industrial compressors: the air receiver and the intercooler which is connected between the first and second stages of the two-stage compressor. The piston in each cylinder was then linked to separate dynamometer with each dynamometer having its own electrical variable speed drive located in the control panel. Each compressor instrument group had two analogue meters. There meters were used to measure directly the current (A) and the voltage (V) applied to the dynamometer.
Compressor 1 (N1) was started and its speed set to 750 rev.min-4. This constant was maintained during the