AppliedThermodynamics 5th ed. by Eastop and Mcconkey Problem 12.14 A single acti

Question

AppliedThermodynamics 5th ed. by Eastop and Mcconkey Problem

12.14

A single acting air motor has a bore of 380mm and stroke of 610mm. The supply pressure and temperature is 6.2 bar and 150 oC respectively. The air motor has a speed of 200 rpm, back pressure of 1.03 bar and cut-off ratio of 0.46. The clearance volume is 20% of the swept volume and mechanical efficiency is 95%. The law of compression and expansion can be expressed by pV1.35 = constant. Considering the temperature and pressure of the air in the clearance space at the beginning of admission are 6.2 bar and 150 oC respectively, calculate;

(a) Air consumption

(b) The air temperature after blow down

(c) The fraction of stroke travelled by the piston before recompression begins

(d) T0h.8e sha0f.4t power developed.

I know the answers, I am looking for the working. Thanks and sorry for the poor formatting.

Explanation / Answer

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