Question $2$

$2\mathrm{.}1$ Describe or illustrate the basic difference between single and double$-$acting

compressors.

$2\mathrm{.}2$ A single$-$acting reciprocating air compressor has a cylinder diameter of $200$ mm

and a stroke of $220$ mm $.$ The index of compression is $1,25$ and the clearance

volume is $5\%$ of the swept cylinder volume. The pressure of the air inside the

cylinder before compression is $96$ kPa and the temperature is $22C.$ The delivery

pressure is $600$ kPa $.$ If the compressor runs at $420$ rpm calculate the :

$2\mathrm{.}2\mathrm{.}1$ swept and induced volume

$2\mathrm{.}2\mathrm{.}2$ free air delivered per minute if free air conditions are $101,3$kPa and $15C$

$2\mathrm{.}2\mathrm{.}3$ volumetric efficiency

$2\mathrm{.}2\mathrm{.}4$ specific work done per revolution.