Piston Displacement: The volume swept by the piston during single stroke of the piston working in a cycle.
Or, the volume of cylinder from the top dead centre to the bottom dead centre.
The swept volume VS is the product of the cross-section area of the cylinder and the length travelled by piston.
Cross-section area of cylinder
AC=,
Length travelled by piston or stroke length
=L Then swept volume
VS=×L And swept volume per second for
K number of cylinders of compressor is given by;
VS=×L×n×K where,
n= no. of revolution per sec.