Problems-11- compressor with compression ratio (7:1). The pressure, temperature andvolume at the beginning of compression are (100kPa), (300K) and (0.07m')respectively. If the compression is adiabatic, determine the adiabatic andisothermal efficiency if the overall efficiency is (60%). Determine also thetemperature at the end of compression.2- Air compressor takes air of mass flow rate (9kg/min) at (100kPa) and (300K).Air leaves the compressor at (600kPa) to the tank. If the compressionaccording to PV5-C. determine the required power to operate thecompressor if the mechanical efficiency is (80%).3- Air compressor compresses (7.8m/min) of air at (27°C) and (100kPa) to(925kPa). Determine the power required when the compression:(a) isothermal,(b) polytropic according to PV-C. find the averall efficiency if themechanical efficiency is (90%).4- Single acting single cylinder compressor with diameter (15cm) and strokelength of (22.5cm). The air enters the compressor at pressure (100kPa) andtemperature (27°C) and is compressed adiabatically to (600kPa). Determinethe power required to operate the compressor if the speed of the motor is(100r.p.m). Also find mass of air compressed per second and the overallefficiency when the mechanical efficiency is (90%).

Answered: Image /qna-images/answer/ccc00104-0810-48c6-a316-dbe0b87166b5.jpg

Problems-1 1- compressor with compression ratio (7:1). The pressure, temperature and volume at the beginning of compression are (100kPa), (300K) and (0.07m³) respectively. If the compression is adiabatic, determine the adiabatic and isothermal efficiency if the overall efficiency is (60%). Determine also the temperature at the end of compression. 2- Air compressor takes air of mass flow rate (9kg/min) at (100kPa) and (300K). Air leaves the compressor at (600kPa) to the tank. If the compression according to PV¹.25=C. determine the required power to operate the compressor if the mechanical efficiency is (80%). 3- Air compressor compresses (7.8m³/min) of air at (27°C) and (100kPa) to (925kPa). Determine the power required when the compression: (a) isothermal, (b) polytropic according to PV¹2 C. find the averall efficiency if the mechanical efficiency is (90%). 4- Single acting single cylinder compressor with diameter (15cm) and stroke length of (22.5cm).The air enters the compressor at pressure (100kPa) and temperature (27°C) and is compressed adiabatically to (600kPa). Determine the power required to operate the compressor if the speed of the motor is (100r.p.m). Also find mass of air compressed per second and the overall efficiency when the mechanical efficiency is (90%).

8th Edition

ISBN:9781305578296

Author:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson

Publisher:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson

Chapter40: Typical Operating Conditions

Section: Chapter Questions

Problem 10RQ: The seasonal energy efficiency ratio (SEER) includes the energy used in the _____and _____cycles.