Consider a reciprocating air compressor with 3-stage, 7.1 m/min free air delivery at atmospheric conditions of 139 kPa and 20 °C, respectively. The polytropic compression index is 1.33, while the delivery pressure is 1,505 kPa. The mechanical and motor-drive efficiencies are 78% and 92%, respectively. Accept complete inter-cooling and neglect clearance volumes. If the specific heat capacity of air at constant pressure and volume are 1.008 kJ/kg K and 0.714 kJ/kg K, respectively. Calculate the input power required to drive the compressor in kilo unit to 1 decimal place. Provide units in the answer.

Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
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Consider a reciprocating air compressor with 3-stage, 7.1 m³/min free air delivery at atmospheric conditions of 139 kPa and
20 °C, respectively. The polytropic compression index is 1.33, while the delivery pressure is 1,505 kPa. The mechanical and
motor-drive efficiencies are 78% and 92%, respectively. Accept complete inter-cooling and neglect clearance volumes. If the
specific heat capacity of air at constant pressure and volume are 1.008 kJ/kg K and 0.714 kJ/kg K, respectively. Calculate the
input power required to drive the compressor in kilo unit to 1 decimal place. Provide units in the answer.
Transcribed Image Text:Consider a reciprocating air compressor with 3-stage, 7.1 m³/min free air delivery at atmospheric conditions of 139 kPa and 20 °C, respectively. The polytropic compression index is 1.33, while the delivery pressure is 1,505 kPa. The mechanical and motor-drive efficiencies are 78% and 92%, respectively. Accept complete inter-cooling and neglect clearance volumes. If the specific heat capacity of air at constant pressure and volume are 1.008 kJ/kg K and 0.714 kJ/kg K, respectively. Calculate the input power required to drive the compressor in kilo unit to 1 decimal place. Provide units in the answer.
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