Two stage compressor testing machine

The purpose of this test is to get familiar with the two-stage compressor device and to check the type of process performed in compressors and the effect of intermediate cooling.
Compressors, like pumps and fans, are devices that increase fluid pressure. Work is applied to the compressor by an external source through a rotating shaft. Therefore, the term of work for compressors is negative because work is done on the fluid. The process performed in compressors is assumed to be isentropic compression theory.
The ambient air enters the inlet tank (the tank on the right side of the figure) through a venturi nozzle and then enters the first stage compressor, and its pressure rises to the middle pressure. After that, it enters the intermediate cooler and storage tank, and then it enters the second stage compressor. Finally, the compressed air enters the final tank and is stored in this tank to the required amount and the rest is discharged.