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%).
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%).
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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Transcribed Image Text:Problems-1
1- compressor with compression ratio (7:1). The pressure, temperature and
volume at the beginning of compression are (100kPa), (300K) and (0.07m')
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 PV5-C. determine the required power to operate the
compressor 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 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%).
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