A two-stage, double-acting, re- ciprocating air compressor operating at 300 rpm, re- ceives air at 1...

 

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A two-stage, double-acting, re- ciprocating air compressor operating at 300 rpm, re- ceives air at 1 bar and 27°C. The bore of LP cylinder is 360 mm and its stroke is 400 mm. Both cylinders have equal stroke and equal clearance of 4%. The LP cylinder discharges air at a pressure of 5 bar. The air then passes through an intercooler to cool air to its initial tempera- ture. Pressure drops in intercooler to 4.75 kPa. Finally air is discharged from HP cylinder at 15 bar. The index of compression and expansion in both cylinders is 1.3. Cp = 1.005 kJ/kg-K, and R = 0.287 kJ/kg-K. Calculate (a) Heat rejected in the intercooler, (b) Diameter of HP cylinder, (c) Power required to drive HP cylinder. A two-stage, double-acting, re- ciprocating air compressor operating at 300 rpm, re- ceives air at 1 bar and 27°C. The bore of LP cylinder is 360 mm and its stroke is 400 mm. Both cylinders have equal stroke and equal clearance of 4%. The LP cylinder discharges air at a pressure of 5 bar. The air then passes through an intercooler to cool air to its initial tempera- ture. Pressure drops in intercooler to 4.75 kPa. Finally air is discharged from HP cylinder at 15 bar. The index of compression and expansion in both cylinders is 1.3. Cp = 1.005 kJ/kg-K, and R = 0.287 kJ/kg-K. Calculate (a) Heat rejected in the intercooler, (b) Diameter of HP cylinder, (c) Power required to drive HP cylinder.