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3. An isentropic air compressor operates between pi= 101.3 kPa, T= 80°C, pe= 0.4 MPa. Find...
1 MPa Isentropic Efficiency of a Compressor Refrigerant-134a enters an adiabatic compressor as a saturated vapor...
1 MPa Isentropic Efficiency of a Compressor Refrigerant-134a enters an adiabatic compressor as a saturated vapor at 100kPa at a rate of 0.7 m/min and exits at 1-MPa pressure. The isentropic efficiency of the compressor is 87%. R-134a Compressor Isentropic Compressor Work hs-h 100 kPa sat. vapor Actual Compressor Work Determine the refrigerant properties at the inlet and outlet for an isentropic process. Actual 2s entropic procEss Inlet state Determine the actual isentropic enthalpy from the efficiency. (Ans: 289.71 J/kg)...
An air compressor has an isentropic efficiency of 90%. If the inlet temperature of the air...
An air compressor has an isentropic efficiency of 90%. If the inlet temperature of the air to the compressor is 300 K, and the minimum work the air compressor can consume is 100.5 kJ/kg. The actual exit temperature of the air is? A. 400 K B. 411.11 K C.350 K D. 500 K
A compressor works on a pressure of 105 kPa and temperature 300 K in a Brayton...
A compressor works on a pressure of 105 kPa and temperature 300 K in a Brayton cycle and has an efficiency of 45%. The exhaust temperature is 700 K. Find the pressure ratio and the specific heat addition by the combustion for this cycle. The inlet pressure of an air compressor is 100 kPa, with temperature 290 K, and brings it to 600 kPa, after which the air is cooled in an intercooler to 330K by heat transfer to the...
Air at 10 degree C and 80 kPa enters the diffuser of a jet engine steadily...
Air at 10 degree C and 80 kPa enters the diffuser of a jet engine steadily with a velocity of 200 m/s. The inlet area of the diffuser is 0.4 m^2.The air leaves the diffuser with a velocity that is very small compared with the inlet velocity. Determine the mass flow rate of the air and the temperature of the air leaving the diffuser. Air at 100 kPa and 280 K is compressed steadily to 600 kPa and 400 K....
Air is compressed by an adiabatic compressor from 95 kPa and 27°C to 600 kPa and...
Air is compressed by an adiabatic compressor from 95 kPa and 27°C to 600 kPa and 277°C. Assuming variable specific heats and neglecting the changes in kinetic and potential energies, determine (a) the isentropic efficiency of the compressor and (b) the exit temperature of air if the process were reversible. b) Texit
A refrigerator is operating between a high pressure of 0.7 MPa and low pressure of 0.1 MPa
A refrigerator is operating between a high pressure of 0.7 MPa and low pressure of 0.1 MPa. The Isentropic efficiency of the compressor is 0.8. The working fluid of the refrigeration cycle is R134a flowing at 0.1 kg/s. The specific heat of air is 1.005 kJ/kgk and density of air is 1.2 kg/m. Calculate a. The compressor exit temperature. b. The compressor power input. c. The evaporator cooling load. d. The coefficient of performance.e. The steam quality at the evaporator inlet.f. If the cooling load...
5-30 Air enters an adiabatic nozzle steadily at 300 kPa, 200°C, and 30 m/s and leaves...
5-30 Air enters an adiabatic nozzle steadily at 300 kPa, 200°C, and 30 m/s and leaves at 100 kPa and 180 m/s. The inlet area of the nozzle is 80 cm². Determine (a) the mass flow rate through the nozzle, (b) the exit temperature of the air, and (c) the exit area of the nozzle. Answers: (a) 0.5304 kg/s, (b) 184.6°C, (c) 38.7 cm P = 300 kPa T, = 200°C Vi = 30 m/s A = 80 cm AIR...
Air enters an adiabatic compressor at 17 Cand 90 KPa with a mass flow rate of...
Air enters an adiabatic compressor at 17 Cand 90 KPa with a mass flow rate of 0.2 Kg/s and exits at 400 KPa. The compressor has an isentropic effeciency of 88 % assuming constant specific heats at room temperature determine: A) The power input to the compressor B) The total rate of exergy destroyed during the process C) The second law efficiency of the compressor D) Draw the actual and isentropic process on T-5 diagram
In a combustion turbine using natural gas as the fuel, air enters the compressor at 98...
In a combustion turbine using natural gas as the fuel, air enters the compressor at 98 kPa and 300 "K. The pressure ratio in the compressor is 8 and the isentropic efficiency of the compressor is 85%. The outlet temperature of the combustion chamber is 1200 K. The pressure drops by 4 percent in the combustion chamber. The exit pressure of the turbine is 102 kPa and the isentropic efficiency of the turbine is 90%. Find: a) The exit temperature...
Problem 1 point): A steam compressor operates with P 100 kPa and x 1 at the...
Problem 1 point): A steam compressor operates with P 100 kPa and x 1 at the inlet, a pressure ratio of r 16, a mass flow rate of m = 5 kg/s, and an isentropic efficiency of n= 75%. Complete a thermodynamic analysis of the compressor, using the appropriate data for water, by finding: (A) The temperature at the exit, T. (B) the work required to operate the compressor, We, and (C) the rate of entropy production of the compressor,...
1 MPa Isentropic Efficiency of a Compressor Refrigerant-134a enters an adiabatic compressor as a saturated vapor at 100kPa at a rate of 0.7 m/min and exits at 1-MPa pressure. The isentropic efficiency of the compressor is 87%. R-134a Compressor Isentropic Compressor Work hs-h 100 kPa sat. vapor Actual Compressor Work Determine the refrigerant properties at the inlet and outlet for an isentropic process. Actual 2s entropic procEss Inlet state Determine the actual isentropic enthalpy from the efficiency. (Ans: 289.71 J/kg)...
An air compressor has an isentropic efficiency of 90%. If the inlet temperature of the air to the compressor is 300 K, and the minimum work the air compressor can consume is 100.5 kJ/kg. The actual exit temperature of the air is? A. 400 K B. 411.11 K C.350 K D. 500 K
Air at 10 degree C and 80 kPa enters the diffuser of a jet engine steadily with a velocity of 200 m/s. The inlet area of the diffuser is 0.4 m^2.The air leaves the diffuser with a velocity that is very small compared with the inlet velocity. Determine the mass flow rate of the air and the temperature of the air leaving the diffuser. Air at 100 kPa and 280 K is compressed steadily to 600 kPa and 400 K....
Air is compressed by an adiabatic compressor from 95 kPa and 27°C to 600 kPa and 277°C. Assuming variable specific heats and neglecting the changes in kinetic and potential energies, determine (a) the isentropic efficiency of the compressor and (b) the exit temperature of air if the process were reversible. b) Texit
5-30 Air enters an adiabatic nozzle steadily at 300 kPa, 200°C, and 30 m/s and leaves at 100 kPa and 180 m/s. The inlet area of the nozzle is 80 cm². Determine (a) the mass flow rate through the nozzle, (b) the exit temperature of the air, and (c) the exit area of the nozzle. Answers: (a) 0.5304 kg/s, (b) 184.6°C, (c) 38.7 cm P = 300 kPa T, = 200°C Vi = 30 m/s A = 80 cm AIR...
Air enters an adiabatic compressor at 17 Cand 90 KPa with a mass flow rate of 0.2 Kg/s and exits at 400 KPa. The compressor has an isentropic effeciency of 88 % assuming constant specific heats at room temperature determine: A) The power input to the compressor B) The total rate of exergy destroyed during the process C) The second law efficiency of the compressor D) Draw the actual and isentropic process on T-5 diagram
In a combustion turbine using natural gas as the fuel, air enters the compressor at 98 kPa and 300 "K. The pressure ratio in the compressor is 8 and the isentropic efficiency of the compressor is 85%. The outlet temperature of the combustion chamber is 1200 K. The pressure drops by 4 percent in the combustion chamber. The exit pressure of the turbine is 102 kPa and the isentropic efficiency of the turbine is 90%. Find: a) The exit temperature...
Problem 1 point): A steam compressor operates with P 100 kPa and x 1 at the inlet, a pressure ratio of r 16, a mass flow rate of m = 5 kg/s, and an isentropic efficiency of n= 75%. Complete a thermodynamic analysis of the compressor, using the appropriate data for water, by finding: (A) The temperature at the exit, T. (B) the work required to operate the compressor, We, and (C) the rate of entropy production of the compressor,...
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