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Thermodynamics 2
Brayton Cycle
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two stage compressor with intercooling between the stages is used to compress air from 1 bar...
two stage compressor with intercooling between the stages is used to compress air from 1 bar and 15C to 9 bar in a Gas-Turbine cycle . The high pressure turbine drives the compressor whereas low pressure turbine is coupled with an electrical generator. The compressor and turbine efficiencies are 85%; 75%, respectively. Heat is added to the compressed air after leaving the compressor till its temperature reaches 900C. The air then expands in HPT to an intermediate pressure and reheat...
Combined cycle power plants are common because of their high efficiency and scalability. They typically combine a gas turbine cycle (the Brayton Cycle) with a steam turbine cycle (the Rankine Cycle) [...
Combined cycle power plants are common because of their high efficiency and scalability. They typically combine a gas turbine cycle (the Brayton Cycle) with a steam turbine cycle (the Rankine Cycle) [1]. The goal of this project is to determine the operating efficiency and profitability of a realistic combined cycle power plant. The power plant is as follows: 1. A natural gas-fired Brayton cycle with mÛ air,Br = 1.25 kg s−1 . (a) Ambient air at 1 bar and 300...
4. A regenerative two-stage gas turbine with reheat operating on the standard-air Brayton cycle i...
4. A regenerative two-stage gas turbine with reheat operating on
the standard-air Brayton cycle is illustrated in Figure 3. In an
ideal Brayton cycle, the processes in the turbines and compressor
are adiabatic and isentropic, and the air flows through the
combustor and heat exchangers at constant pressure.
a) Show that the maximum total work output is
developed when the pressure ratio is the same across each stage, if
the temperature at the inlet to each turbine stage is the...
Thermodynamics 2: STARTING FROM QS 2) 1) In an ideal Brayton cycle air enters the compressor...
Thermodynamics 2: STARTING FROM QS 2) 1) In an ideal Brayton cycle air enters the compressor at T = 300K and P = 1 bar with a volumetric flow rate = 20 m3/s. Air enters the turbine at P = 10 bar and T = 1800K. Find: a) The thermal efficiency b) The backwork ratio c) The net power generation in MW 2) For the same states above consider a cycle where the isentropic efficiency of the compressor and turbine...
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...
Problems 2 through 6 below are to be considered with reference to an Ideal Brayton Cycle...
Problems 2 through 6 below are to be considered with reference to an Ideal Brayton Cycle with the following operating parameters: • Atmospheric conditions of 300K @ 100 kPa at the compressor inlet • 1.250K @ 900 kPa at the turbine inlet Be sure to read each problem carefully and utilize the specified assumptions. Use the air standard assumptions and treat specific heats as described in each problem. Also, assume isentropic mechanical energy transfers and isobaric thermal energy transfers throughout....
Problem 2/2 (50%) -The gas-turbine cycle of a combined gas-steam power plant has a pressure ratio...
Problem 2/2 (50%) -The gas-turbine cycle of a combined gas-steam power plant has a pressure ratio of 12. Air enters the compressor at 310 K and the turbine at 1400 K. The combustion gases leaving the gas turbine are used to heat the steam at 12.5 MPa to 500 C in a heat exchanger. The combustion gases leave the heat exchanger at 247"C. Steam expands in a high pressure turbine to a pressure of 2.5 MPa and is reheated in...
174 2 combustor , =1500 K Problem 2 (22 pts): Brayton cycle and entropy calculations An...
174 2 combustor , =1500 K Problem 2 (22 pts): Brayton cycle and entropy calculations An open Brayton cycle is used to generate electricity. Air enters the isentropic compressor at T1 = 300 K and P1 = 100 kPa with a mass flow rate m = 1.5 kg/s. The combustor can be modeled as a constant-pressure heat exchanger, supplying 1540 kW of thermal power to the air from a thermal reservoir (Th = 1750 K). Air enters the isentropic turbine...
4. A regenerative two-stage gas turbine with reheat operating on
the standard-air Brayton cycle is illustrated in Figure 3. In an
ideal Brayton cycle, the processes in the turbines and compressor
are adiabatic and isentropic, and the air flows through the
combustor and heat exchangers at constant pressure.
a) Show that the maximum total work output is
developed when the pressure ratio is the same across each stage, if
the temperature at the inlet to each turbine stage is the...
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...
Problems 2 through 6 below are to be considered with reference to an Ideal Brayton Cycle with the following operating parameters: • Atmospheric conditions of 300K @ 100 kPa at the compressor inlet • 1.250K @ 900 kPa at the turbine inlet Be sure to read each problem carefully and utilize the specified assumptions. Use the air standard assumptions and treat specific heats as described in each problem. Also, assume isentropic mechanical energy transfers and isobaric thermal energy transfers throughout....
Problem 2/2 (50%) -The gas-turbine cycle of a combined gas-steam power plant has a pressure ratio of 12. Air enters the compressor at 310 K and the turbine at 1400 K. The combustion gases leaving the gas turbine are used to heat the steam at 12.5 MPa to 500 C in a heat exchanger. The combustion gases leave the heat exchanger at 247"C. Steam expands in a high pressure turbine to a pressure of 2.5 MPa and is reheated in...
174 2 combustor , =1500 K Problem 2 (22 pts): Brayton cycle and entropy calculations An open Brayton cycle is used to generate electricity. Air enters the isentropic compressor at T1 = 300 K and P1 = 100 kPa with a mass flow rate m = 1.5 kg/s. The combustor can be modeled as a constant-pressure heat exchanger, supplying 1540 kW of thermal power to the air from a thermal reservoir (Th = 1750 K). Air enters the isentropic turbine...
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