5 A single-acting compressor is required to deliver air at 70 bar from an induction pressure of 1 bar, at the rate of 2.4 m³/min measured at free air conditions of 1.013 bar and 15 °C. The compression is carried out in two stages with an ideal intermediate pressure and complete intercooling. The clearance volume is 3% of the swept volume in each cylinder and the compressor speed is 750 rev/min. The index of compression and re-expansion is 1.25 for both cylinders and the temperature at the end of the induction stroke in each cylinder is 32°C. The mechanical efficiency of the compressor is 85%. Calculate: (i) the indicated power required; (ii) the saving in power over single-stage compression between the same pressures; (iii) the swept volume of each cylinder; (iv) the required power output of the drive motor. 0.000474 m³. 26 75 kW)

5 A single-acting compressor is required to deliver air at 70 bar from an induction pressure of 1 bar, at the rate of 2.4 m³/min measured at free air conditions of 1.013 bar and 15 °C. The compression is carried out in two stages with an ideal intermediate pressure and complete intercooling. The clearance volume is 3% of the swept volume in each cylinder and the compressor speed is 750 rev/min. The index of compression and re-expansion is 1.25 for both cylinders and the temperature at the end of the induction stroke in each cylinder is 32°C. The mechanical efficiency of the compressor is 85%. Calculate: (i) the indicated power required; (ii) the saving in power over single-stage compression between the same pressures; (iii) the swept volume of each cylinder; (iv) the required power output of the drive motor. 0.000474 m³. 26 75 kW)

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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Question

12.5 A single-acting compressor is required to deliver air at 70 bar from an induction pressure
of 1 bar, at the rate of 2.4 m³/min measured at free air conditions of 1.013 bar and 15°C.
The compression is carried out in two stages with an ideal intermediate pressure and
complete intercooling. The clearance volume is 3% of the swept volume in each cylinder
and the compressor speed is 750 rev/min. The index of compression and re-expansion
is 1.25 for both cylinders and the temperature at the end of the induction stroke in each
cylinder is 32°C. The mechanical efficiency of the compressor is 85%. Calculate:
(i) the indicated power required;
(ii) the saving in power over single-stage compression between the same pressures;
(iii) the swept volume of each cylinder;
(iv) the required power output of the drive motor.
0306 30.000474 m3. 26 75 kW)

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