A single stage, single acting air compressor running at 1000 rev/min delivers air at 25 bar. Please see attached file for further description.
Please see the attachment.
(a) The thermodynamic process of compression is illustrated in the figure below:
The swept volume is given by
where the clearance volume is given as
so that, replacing in (1), one derives:
The process of the expansion 3-4 is a polytropic one, so that it is described by the equation:
where n = polytropic index, the same for compression and expansion.
Since , and the expansion index n=1.3, it follows that
The expert examines a single stage and a single acting air compressor.