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Question 4 (16 Marks) A frictionless, adiabatic compressor compresses hydrogen at a pressure of 3 bar and a temperat...
The refrigerant R134a flows through an adiabatic compressor in stationary operation. The volume at the inlet...
The refrigerant R134a flows through an adiabatic compressor in stationary operation. The volume at the inlet is 500 liters / min. At the inlet, the refrigerant is at 0 ° C and 200kPa. At the outlet, the pressure is 1MPa. The compressor has an isentropic efficiency of 85%. The environment of the compressor is at 25 ° C and 100kPa. a) Calculate the specific enthalpy at the compressor outlet (in kJ / kg). Draw a Ts diagram of the process...
A compressor is takes in air at an inlet pressure of P1 = 80 kPa and...
A compressor is takes in air at an inlet pressure of P1 = 80 kPa and an inlet temperature of T1 = 20oC and exhausts it at an outlet pressure of P2 =800 kPa and an outlet temperature of T1 = 200oC. Air flows through the compressor at a mass flow rate of m = 1 kg/s. Assume that the compressor is adiabatic. Find the power required to run the compressor. (Your answer will be in kW.)
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)...
A compressor is used to steadily compress Air which enters the compressor at a pressure of...
A compressor is used to steadily compress Air which enters the compressor at a pressure of 220 kPa, a temperature of 320 K, and a velocity of 8 m/s through an inlet with area of 0.13 m². The air exits the compressor at a pressure of 770 kPa, temperature is 490 K, and a of velocity is 4 m/s. The compressor consumes 430 kW of power. Assuming variable specific heats, find: A) The heat transfer during this process. B) The...
1. 6. An adiabatic, steady state air compressor compresses 10 L/S of air at 120 kPa...
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6. An adiabatic, steady state air compressor compresses 10 L/S of air at 120 kPa and 20 C to 1000 kPa and 300 C. Determine: (a) the mass flow rate of the air in kg/s (b) the power required to drive the air compressor, in kW. Air; c 1.018 kJ/kg K, the gas constant R 0.287 kPa.m/kg.K 1 MPa 300°C Compressor 120 kPa 20°C 101/s
Question 4 2 pts An air compressor, operated at steady state, compresses air from 1 bar...
Question 4 2 pts An air compressor, operated at steady state, compresses air from 1 bar 25°C to 8 bar. At the outlet of the compressor, the air temperature is 90°C. The compressor transfers heat to the surroundings at 200kJ for each kg of air passing through the compressor. The average temperature at which the heat is transferred is 50°C. Which of the following values is closest to the specific entropy production of the compressor process? For air, Cp=1.01 kJ/kgk...
(33%) An insulated compressor is used in an air conditioner that uses R-134a as the working fluid...
(33%) An insulated compressor is used in an air conditioner that uses R-134a as the working fluid. The R-134a enters °C. The mass flow rate of the R-134a through the compressor is 0.1 kg/s. Determine the following: the compressor as a saturated vapor at 4 °C and exits at 10 bar, 70 1-a) The compressor inlet pressure in bar 1-b) The compressor work per unit mass in kJ/kg. 1-c) The compressor power requirement in kW.
(33%) An insulated compressor is...
Question 5 (10 marks) A perfect gas, initially at high pressure, flows steadily into an adiabatic,...
Question 5 (10 marks) A perfect gas, initially at high pressure, flows steadily into an adiabatic, reversible turbine at a mass flow rate of 1.0 kg s!. It emerges at low pressure. The velocities at inlet and outlet are 50 m stand 75 m s', respectively, and the outlet pipe is 2.5 m above the inlet pipe. The power output of the turbine is 966 kW. Calculate: (a) the change in kinetic energy across the turbine per kg of gas;...
Please solve and show work for each part thanks s total) An adiabatic air compressor is...
Please solve and show work for each part thanks
s total) An adiabatic air compressor is powered by a direct-coupled (35 pts total) adiab atic steam turbine. This same turbine also simultaneously drivesa nerator (see next page). Steam enters the turbine at 12.5 MPa and 500 degrees C at a rate of 50 kg/sec, and exits at 10kPa with a quality of 0.92. Air enters the compressor at 98 kPa and 295 K at a rate of 17 kg/sec and...
Question 3 pre-whirl compresses air and has the following dimensions and data: A centrifugal compressor designed...
Question 3 pre-whirl compresses air and has the following dimensions and data: A centrifugal compressor designed with radial blades and Air radial flow velocity at exit 40 m/s Air tangential flow velocity at exit 96 m/s Slip factor 50 Power input factor 1.02 Flow area at exit 0.09 m Air density 1.5 kg/ms Inlet stagnation temperature 300 K Assume a radial entrance. Determine Final pressure at exit in (KP
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)...
A compressor is used to steadily compress Air which enters the compressor at a pressure of 220 kPa, a temperature of 320 K, and a velocity of 8 m/s through an inlet with area of 0.13 m². The air exits the compressor at a pressure of 770 kPa, temperature is 490 K, and a of velocity is 4 m/s. The compressor consumes 430 kW of power. Assuming variable specific heats, find: A) The heat transfer during this process. B) The...
1.
6. An adiabatic, steady state air compressor compresses 10 L/S of air at 120 kPa and 20 C to 1000 kPa and 300 C. Determine: (a) the mass flow rate of the air in kg/s (b) the power required to drive the air compressor, in kW. Air; c 1.018 kJ/kg K, the gas constant R 0.287 kPa.m/kg.K 1 MPa 300°C Compressor 120 kPa 20°C 101/s
Question 4 2 pts An air compressor, operated at steady state, compresses air from 1 bar 25°C to 8 bar. At the outlet of the compressor, the air temperature is 90°C. The compressor transfers heat to the surroundings at 200kJ for each kg of air passing through the compressor. The average temperature at which the heat is transferred is 50°C. Which of the following values is closest to the specific entropy production of the compressor process? For air, Cp=1.01 kJ/kgk...
(33%) An insulated compressor is used in an air conditioner that uses R-134a as the working fluid. The R-134a enters °C. The mass flow rate of the R-134a through the compressor is 0.1 kg/s. Determine the following: the compressor as a saturated vapor at 4 °C and exits at 10 bar, 70 1-a) The compressor inlet pressure in bar 1-b) The compressor work per unit mass in kJ/kg. 1-c) The compressor power requirement in kW.
(33%) An insulated compressor is...
Question 5 (10 marks) A perfect gas, initially at high pressure, flows steadily into an adiabatic, reversible turbine at a mass flow rate of 1.0 kg s!. It emerges at low pressure. The velocities at inlet and outlet are 50 m stand 75 m s', respectively, and the outlet pipe is 2.5 m above the inlet pipe. The power output of the turbine is 966 kW. Calculate: (a) the change in kinetic energy across the turbine per kg of gas;...
Please solve and show work for each part thanks
s total) An adiabatic air compressor is powered by a direct-coupled (35 pts total) adiab atic steam turbine. This same turbine also simultaneously drivesa nerator (see next page). Steam enters the turbine at 12.5 MPa and 500 degrees C at a rate of 50 kg/sec, and exits at 10kPa with a quality of 0.92. Air enters the compressor at 98 kPa and 295 K at a rate of 17 kg/sec and...
Question 3 pre-whirl compresses air and has the following dimensions and data: A centrifugal compressor designed with radial blades and Air radial flow velocity at exit 40 m/s Air tangential flow velocity at exit 96 m/s Slip factor 50 Power input factor 1.02 Flow area at exit 0.09 m Air density 1.5 kg/ms Inlet stagnation temperature 300 K Assume a radial entrance. Determine Final pressure at exit in (KP
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