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Problem 1 A Brayton-cycle power plant takes in air at 100 kPa and 26.7°C. Compression in two stag...
Pressure ratio of a Brayton cycle with air operated regenerator 8. The lowest and highest temperatures...
Pressure ratio of a Brayton cycle with air operated regenerator 8. The lowest and highest temperatures of the cycle are 310 K and 1150 K. Adiabatic efficiency of compressor and turbine 75% and 82%, respectively. the efficiency of the regenerator is 65%. The cycle in the T-s diagram Show. Consider the variation of specific temperatures with temperature. a) the temperature of the air at the turbine outlet, b) Net work of the cycle, c) Calculate the thermal efficiency of the...
Air enters the compressor of a cold air-standard Brayton cycle with regeneration at 100 kPa, 300...
Air enters the compressor of a cold air-standard Brayton cycle with regeneration at 100 kPa, 300 K, with a volume flow rate of 5 m3/s. The compressor pressure ratio is 8, and the turbine inlet temperature is 1400 K. The turbine and compressor each have isentropic efficiencies of 80% and the regenerator effectiveness is 80%. For the air, k = 1.4 and the ambient temperature is T0 = 300 K. -Determine the thermal efficiency of the cycle. -determine the back...
Air enters the compressor of a cold air-standard Brayton cycle at 100 kpa, 300 k, with...
Air enters the compressor of a cold air-standard Brayton cycle at 100 kpa, 300 k, with a mass flow rate of 6 kg/s. the compressor pressure ratio is 10, and the turbine inlet temperature is 1400 K. For k = 1.4, calculate a. The thermal efficiency of the cycle b. The back work ratio c. The net power developed, in kW d. Reconsider the above with an ideal regenerator.
An ideal Brayton power generation cycle draws in air at 100 kPa and 20 °C. The...
An ideal Brayton power generation cycle draws in air at 100 kPa and 20 °C. The compressor increases the pressure to 500 kPa. The burner adds heat equal to 500 kJ/kg. You can use air standard analysis and assume constant specific heats. (a) (5 pts) find the temperature after the compressor (b) (5 pts) find the specific compressor work (c) (5 pts) find the temperature after the burner (d) (5 pts) find the turbine work (e) (5 pts) find the...
Consider a closed Brayton cycle heat-engine. Air is compressed from 300K, 100 kPa to 580K, 700...
Consider a closed Brayton cycle heat-engine. Air is compressed from 300K, 100 kPa to 580K, 700 kPa. The air is heated at the rate of 950 kJ/kg before it enters the turbine. The isentropic efficiency of the turbine is 86%. Determine: a) the fraction of the turbine shaft power used to drive the compressor, and b) the thermal efficiency of the engine. Sketch the prooess on a T-s diagram. Do the calculation first with variable specific heats and then repeat...
Air enters the compressor of a regenerative air-standard Brayton cycle with a volumetric flow rate of...
Air enters the compressor of a regenerative air-standard Brayton cycle with a volumetric flow rate of 100 m3/s at 0.8 bar, 280 K. The compressor pressure ratio is 20, and the maximum cycle temperature is 2100 K. For the compressor, the isentropic efficiency is 92% and for the turbine the isentropic efficiency is 95%. For a regenerator effectiveness of 86%, determine: (a) the net power developed, in MW. (b) the rate of heat addition in the combustor, in MW. (c)...
Process Combuster Compressor ip Compressor Turbine 10 Intercooler Figure 1 shows a typical Brayton power cycle...
Process Combuster Compressor ip Compressor Turbine 10 Intercooler Figure 1 shows a typical Brayton power cycle with inter-cooling Air enters the compressor at 98 kPa and 24 °C. Compression is done in two stages with inter-cooling between the stages. The compressor has an isentropic efficiency of 87% The gas exits the combustor at 490 kPa and 850 °C. The turbine has an isentropic efficiency of 95%. A gas stream with a temperature of 950 "C, recovered from another process, is...
Air enters the compressor of a regenerative air-standard Brayton cycle with a volumetric flow rate of...
Air enters the compressor of a regenerative air-standard Brayton cycle with a volumetric flow rate of 20 m3/s at 0.8 bar, 280 K. The compressor pressure ratio is 20, and the maximum cycle temperature is 1950 K. For the compressor, the isentropic efficiency is 92% and for the turbine the isentropic efficiency is 95%. For a regenerator effectiveness of 86%, determine: (a) the net power developed, in MW. (b) the rate of heat addition in the combustor, in MW. (c)...
An air-standard Brayton cycle includes a regenerator which is shown in the below figure. The air...
An air-standard Brayton cycle includes a regenerator which is shown in the below figure. The air enters the compressor at 100 kPa, 20℃. The pressure ratio across the compressor is 9:1. The highest temperature in the cycle is 1100℃, and the flow rate of the air is 10 kg/s. The regenerator operates at effectiveness 80 percent. Both the efficiencies of the turbine and the compressor are 85%. Do not use Table A-22. Assuming constant specific heat ( cp = 1.004...
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...
Air enters the compressor of a cold air-standard Brayton cycle at 100 kpa, 300 k, with a mass flow rate of 6 kg/s. the compressor pressure ratio is 10, and the turbine inlet temperature is 1400 K. For k = 1.4, calculate a. The thermal efficiency of the cycle b. The back work ratio c. The net power developed, in kW d. Reconsider the above with an ideal regenerator.
An ideal Brayton power generation cycle draws in air at 100 kPa and 20 °C. The compressor increases the pressure to 500 kPa. The burner adds heat equal to 500 kJ/kg. You can use air standard analysis and assume constant specific heats. (a) (5 pts) find the temperature after the compressor (b) (5 pts) find the specific compressor work (c) (5 pts) find the temperature after the burner (d) (5 pts) find the turbine work (e) (5 pts) find the...
Consider a closed Brayton cycle heat-engine. Air is compressed from 300K, 100 kPa to 580K, 700 kPa. The air is heated at the rate of 950 kJ/kg before it enters the turbine. The isentropic efficiency of the turbine is 86%. Determine: a) the fraction of the turbine shaft power used to drive the compressor, and b) the thermal efficiency of the engine. Sketch the prooess on a T-s diagram. Do the calculation first with variable specific heats and then repeat...
Process Combuster Compressor ip Compressor Turbine 10 Intercooler Figure 1 shows a typical Brayton power cycle with inter-cooling Air enters the compressor at 98 kPa and 24 °C. Compression is done in two stages with inter-cooling between the stages. The compressor has an isentropic efficiency of 87% The gas exits the combustor at 490 kPa and 850 °C. The turbine has an isentropic efficiency of 95%. A gas stream with a temperature of 950 "C, recovered from another process, is...
Air enters the compressor of a regenerative air-standard Brayton cycle with a volumetric flow rate of 20 m3/s at 0.8 bar, 280 K. The compressor pressure ratio is 20, and the maximum cycle temperature is 1950 K. For the compressor, the isentropic efficiency is 92% and for the turbine the isentropic efficiency is 95%. For a regenerator effectiveness of 86%, determine: (a) the net power developed, in MW. (b) the rate of heat addition in the combustor, in MW. (c)...
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...
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