For finding the isentropic efficiency of compressor, net work produced and thermal efficiency of the cycle, we just need temperatures at all the 4 points. Missing values of temperatures are obtained using isentropic relationship between pressure and temperature.
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3a. A gas-turbine power plant operates on the simple Brayton cycle between the pressure limits of...
Problem 1 (Marks 3) Smithfield power station in NSW, Australia operates on 4 gas turbines. Each of the gas turbine unit operates on the regenerative Brayton Cycle between the pressure limits of 100 kPa and 700 kPa. Air enters the compressor at 30°C at a rate of 12.6 kg/s and leaves at 260°C. It is then heated in a regenerator to 400°C by hot combustion gases leaving the turbine. Diesel fuel with heating value of 42,000 kJ/kg is burned in...
1. A combined gas-steam power cycle uses a single gas turbine cycle for the air cycle and a simple Rankine cycle for the water vapor cycle. Atmospheric air enters the compressor at a rate of 88.2 lbm / s, at 14.7 psia and 59 ° F, and the maximum gas cycle temperature is 1,742 ° F. The pressure ratio in the compressor is 7. The isentropic efficiency of both the compressor and the turbine is 80%. Gas exits the heat...
Need help for this Brayton Cycle problem. Please help me 4. (30 marks) A gas-turbine power plant operates on the simple Brayton cycle between the pressure limits of 100 kPa and 800 kPa. The T-s diagram of this cycle is shown in Fig. 2. Air enters the compressor at 30°C and leaves at 330°C at a mass flow rate of 200 kg/s. The maximum cycle temperature is 1400 K. During operation of the cycle, the net power output is measured...
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...
Q A power plant located at Penang has been generated by Brayton cycle to operate gas turbine involved air as the working fluid of the plant. Fresh air has been supplied to the compressor at 35°C and 100 kPa, while entered the combustion chamber at 350°C and 0.8 MPa with flow rate of 1200 kg/min and leaves the chamber at 1127°C. However, the power output for the plant has been measured during the experiment is 70000 kW Assume constant properties...
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.
Problem4 (a) (40 points) A combined gas-steam powe cycles. The ideal Brayton and Rankine plant operates on Rankine cycle has a reheater. The Brayton cycle operates on a gas- of the gas-turbine cycle 1400 K The 15MPa to ercooling, reheating, and regeneration cycle. The pressure ratio 300 K for compressor stages is do Air enters compressors a combustion gases leaving the lower pressure gas turbine are used to heat the steam at C in a heat exchanger. The combustion gases...
Combustion gases enter an adiabatic gas turbine at 1540 F degrees and 120 psia and leave at 60 psia with a low velocity. Treating the combustion gases as air and assumming an isentropic efficiency of 82 percent, determine the work output of the turbine. Assume that combustion gases can be treated as an ideal gas with variable specific heats.
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...
Consider the combined gas-steam power cycle,The topping cycle is a gas-turbine cycle that has a pressure ratio of 8.Air enters the compressor at 300K and the turbine at 1300K.The isentropic efficiency of the compressor is 80 percent, and that of the gas is 85 percent.The bottoming cycle is a simple ideal Rankine cycle operating between the pressures limits of 7 MPa and 5 KPa.Steam is heated in a heat exchanger by the exahust gases to a temperature of 5000C.The exhaust...