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An air cooling system for a jet plane operates on simple air cycle. The cock-pit is to be maintai...
In an aircraft cooling system, air enters the compressor at 1 bar and 4°C and is...
In an aircraft cooling system, air enters the compressor at 1 bar and 4°C and is compressed to 3 bar with an isentropic efficiency of 72%. The compressed air is cooled in a heat exchanger at constant pressure to 55°C and expands in an expander to 1 bar with an isentropic efficiency of 78%. The low temperature air absorbs heat load of 3 tonnes of refrigeration at constant pressure before re- entering the compressor. The compressor is driven by the...
A simple Brayton cycle using air as the working fluid has a pressure ratio of 10....
A simple Brayton cycle using air as the working fluid has a pressure ratio of 10. The minimum and maximum temperatures in the cycle are 295 and 1240K. Assuming an isentropic efficiency of 83 percent for the compressor and 87 percent for the turbine. Determine the second law efficiencies of the compressor, the turbine, and the combustion chamber.
ta Vew Wiadcw Helpr Home Tocls 101 2019.0.Cot QUESTION 9 In a jet engine rotor the high pressure axial compressor ro...
ta Vew Wiadcw Helpr Home Tocls 101 2019.0.Cot QUESTION 9 In a jet engine rotor the high pressure axial compressor rotates at a speed of 15000 rpm. The overall stagnation pressure ratio due to compression is 10.1, it was recorded that the air flows at a rate of 16 kg/s. The stagnation properties at the inlet are 215 kPa and 460K. The poly-tropic efficiency of the compressor is 90%. Assume the mean radius of the compressor is constant and equal...
2. Consider a combined gas steam power cycle. The gas cycle is a simple Brayton cycle...
2. Consider a combined gas steam power cycle. The gas cycle is a
simple Brayton cycle that has a pressure ratio of 7. Air enters at
9.8 kg / s at the compressor at 15 ° C and 100 kPa, and at the gas
turbine at 950 ° C. The steam cycle is a Rankine cycle with
overheating between the pressure limits of 6 MPa and 10 kPa. The
water vapor is heated in the heat exchanger at a rate...
ycles 1. A refrigeration system operates with a superheated cycle using R134a. The required refrigerating capacity...
ycles 1. A refrigeration system operates with a superheated cycle using R134a. The required refrigerating capacity is 30 TR. The evaporator works at -10 Cand the condenser pressure is 1 MPa. The refrigerant is superheated by 10°C before entering to the compressor. Assume isentropic compression in the compressor and isenthalpic expansion in the expansion valve. Answering the following questions using the ph diagram. and the c Sion in the ring to a) Sketch the process in the p-h diagram and...
Part 6 Question 1 (3 marks) The power cycle shown below operates at steady state. Air...
Part 6 Question 1 (3 marks) The power cycle shown below operates at steady state. Air (constant k = 1.4) enters the compressor at 0.1 MPa and 15.C. The pressure leaving the compressor is 1.0 MPa, and the maximum temperature in the cycle is 1100-C. Deterinine the temperature at the exit of the turbine, in Kelvin. Heat exchanger 2 3 Compressor Turbino Inel Heat exchanger
A combined gas–steam power plant has been designed with a net power output of 450 MW....
A combined gas–steam power plant has been designed with a net power output of 450 MW. The pressure ratio of the gas-turbine cycle is 14. Air enters the compressor at 300 K and the turbine at 1400 K. The combustion gases leaving the gas turbine are used to heat the steam at 8 MPa to 400 C in a heat exchanger. The combustion gases leave the heat exchanger at 460 K. An open feedwater heater incorporated with the steam cycle...
MECH 3312 (Thermodynamics) Extra Credits01 Spring 2019 Q2.0 The gas-turbine portion of a combined...
MECH 3312 (Thermodynamics) Extra Credits01 Spring 2019 Q2.0 The gas-turbine portion of a combined gas-steam power plant has a pressure ratio of 18. Air enters the compressor at 350 K at a rate of 15.5 kg/s and is heated to 1580 K in the combustion chamber. The combustion gases leaving the gas turbine are used to heat the steam to 417'C at 10 MPa in a heat exchanger. The combustion gases leave the heat exchanger at 430 K. The steam...
Thermodynamics A steam power plant operates with high pressure oft 4 MPa and hasleel receiving heat from a 700°C reservoir. The ambient air at 20°C provides cooling to maintain the water/vapor m...
Thermodynamics
A steam power plant operates with high pressure oft 4 MPa and hasleel receiving heat from a 700°C reservoir. The ambient air at 20°C provides cooling to maintain the water/vapor mixture in the condenser at 60°C. All components are ideal i.e., reversible) except the turbine which has an efficiency 92% of a reversible, isentropic process. Other than the irreversibility of the turbine, the power plant can be considered as a Rankine cycle. Determine the following quantities in the suggested...
A simple ideal Brayton cycle operates with air with minimum and maximum temperatures of 27°C and...
A simple ideal Brayton cycle operates with air with minimum and
maximum temperatures of 27°C and 727°C. It is designed so that the
maximum cycle pressure is 2000 kPa and the minimum cycle pressure
is 100 kPa. The isentropic efficiency of the turbine is 96 percent.
Determine the net work produced per unit mass of air each time this
cycle is executed and the cycle’s thermal efficiency. Use constant
specific heats at room temperature. The properties of air at room...
In an aircraft cooling system, air enters the compressor at 1 bar and 4°C and is compressed to 3 bar with an isentropic efficiency of 72%. The compressed air is cooled in a heat exchanger at constant pressure to 55°C and expands in an expander to 1 bar with an isentropic efficiency of 78%. The low temperature air absorbs heat load of 3 tonnes of refrigeration at constant pressure before re- entering the compressor. The compressor is driven by the...
ta Vew Wiadcw Helpr Home Tocls 101 2019.0.Cot QUESTION 9 In a jet engine rotor the high pressure axial compressor rotates at a speed of 15000 rpm. The overall stagnation pressure ratio due to compression is 10.1, it was recorded that the air flows at a rate of 16 kg/s. The stagnation properties at the inlet are 215 kPa and 460K. The poly-tropic efficiency of the compressor is 90%. Assume the mean radius of the compressor is constant and equal...
2. Consider a combined gas steam power cycle. The gas cycle is a
simple Brayton cycle that has a pressure ratio of 7. Air enters at
9.8 kg / s at the compressor at 15 ° C and 100 kPa, and at the gas
turbine at 950 ° C. The steam cycle is a Rankine cycle with
overheating between the pressure limits of 6 MPa and 10 kPa. The
water vapor is heated in the heat exchanger at a rate...
ycles 1. A refrigeration system operates with a superheated cycle using R134a. The required refrigerating capacity is 30 TR. The evaporator works at -10 Cand the condenser pressure is 1 MPa. The refrigerant is superheated by 10°C before entering to the compressor. Assume isentropic compression in the compressor and isenthalpic expansion in the expansion valve. Answering the following questions using the ph diagram. and the c Sion in the ring to a) Sketch the process in the p-h diagram and...
Part 6 Question 1 (3 marks) The power cycle shown below operates at steady state. Air (constant k = 1.4) enters the compressor at 0.1 MPa and 15.C. The pressure leaving the compressor is 1.0 MPa, and the maximum temperature in the cycle is 1100-C. Deterinine the temperature at the exit of the turbine, in Kelvin. Heat exchanger 2 3 Compressor Turbino Inel Heat exchanger
MECH 3312 (Thermodynamics) Extra Credits01 Spring 2019 Q2.0 The gas-turbine portion of a combined gas-steam power plant has a pressure ratio of 18. Air enters the compressor at 350 K at a rate of 15.5 kg/s and is heated to 1580 K in the combustion chamber. The combustion gases leaving the gas turbine are used to heat the steam to 417'C at 10 MPa in a heat exchanger. The combustion gases leave the heat exchanger at 430 K. The steam...
Thermodynamics
A steam power plant operates with high pressure oft 4 MPa and hasleel receiving heat from a 700°C reservoir. The ambient air at 20°C provides cooling to maintain the water/vapor mixture in the condenser at 60°C. All components are ideal i.e., reversible) except the turbine which has an efficiency 92% of a reversible, isentropic process. Other than the irreversibility of the turbine, the power plant can be considered as a Rankine cycle. Determine the following quantities in the suggested...
A simple ideal Brayton cycle operates with air with minimum and
maximum temperatures of 27°C and 727°C. It is designed so that the
maximum cycle pressure is 2000 kPa and the minimum cycle pressure
is 100 kPa. The isentropic efficiency of the turbine is 96 percent.
Determine the net work produced per unit mass of air each time this
cycle is executed and the cycle’s thermal efficiency. Use constant
specific heats at room temperature. The properties of air at room...
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