The shaft power input to a single cylinder double acting compressor i…

Question

The shaft power input to a single cylinder double acting compressor is 6.93 kW. The mechanical and volumetric efficiencies are 82% and 87% respectively. The cylinder diameter is 12 cm and the stroke is 15 cm. On the crank side, the cross-sectional area of the piston rod is 10% of the total cylinder area. The crank speed is 500 revolutions per minute. Determine

i. The rate of delivery of air from the compressor

ii. The delivery pressure and

iii. The index of compression and expansion.

Assume the clearance to be $1/32$ of the swept volume. Assume the suction conditions to be 1 atm and 300 K.

Related pages

• Nomenclature of Piston-Cylinder arrangement w.r.t. swept volume; clearance volume, compression ratio and mean effective pressure — topic
• THERMODYNAMICS syllabus