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Consider a combined gas-steam power cycle. The gas cycle is a simple Brayton cycle that has a pressure ratio of 7. The air enters the compressor at 15 °C at a rate of 10 kg / s, and the gas turbine at 950 °C.The vapour cycle is a Rankine cycle with overheating between the pressure limits of 6 MPa and 10 kPa. The water vapour is heated in the heat exchanger at a rate of 1.15 kg / s for the exhaust gases that leave the gas turbine, and the exhaust gases leave the heat exchanger at 200 °C. The vapour leaves the high-pressure turbine at 1.0 MPa and reheats to 400 °C in the heat exchanger before it expands at low pressure pressure. Assuming an isentropic efficiency of 80 percent for all pumps, turbines and compressors, determine:A) the moisture content at the outlet of the low turbinePressureB) the vapour temperature at the entrance of the high turbinePressureC) the net power production and thermal efficiency of theCombined plant.
Consider a combined gas-steam power cycle. The gas cycle is a simple Brayton cycle that has a pressure ratio of 7. The air enters the compressor at 15 °C at a rate of 10 kg / s, and the gas turbine at 950 °C.
The vapour cycle is a Rankine cycle with overheating between the pressure limits of 6 MPa and 10 kPa. The water vapour is heated in the heat exchanger at a rate of 1.15 kg / s for the exhaust gases that leave the gas turbine, and the exhaust gases leave the heat exchanger at 200 °C. The vapour leaves the high-pressure turbine at 1.0 MPa and reheats to 400 °C in the heat exchanger before it expands at low pressure pressure. Assuming an isentropic efficiency of 80 percent for all pumps, turbines and compressors, determine:
A) the moisture content at the outlet of the low turbine
Pressure
B) the vapour temperature at the entrance of the high turbine
Pressure
C) the net power production and thermal efficiency of the
Combined plant.
Problema 2: Considere un ciclo combinado de potencia de gas-vapor. El ciclo de gas es un ciclo Brayton simple que tiene una relación de presiones de 7. El aire entra al compresor a 15 °C a razón de 10 kg/s, y a la turbina de gas a 950 °C. El ciclo de vapor es un ciclo Rankine con recalentamiento entre los límites de presión de 6 MPa y 10 kPa. El vapor de agua se calienta en el intercambiador de calor a razón de 1.15 kg/s por los gases de escape que salen de la turbina de gas, y los gases de escape salen del intercambiador de calor a 200 °C. El vapor sale de la turbina de alta presión a 1.0 MPa y se recalienta a 400 °C en el intercambiador de calor antes de que se expanda en la presión de baja presión. Suponiendo una eficiencia isentrópica de 80 por ciento para todas las bombas, turbinas y compresor, determine: a) el contenido de humedad a la salida de la turbina de baja presión b) la temperatura del vapor a la entrada de la turbina de alta presión c) la producción neta de potencia y la eficiencia térmica de la planta combinada. Compresor He Cámara de combustión Intercam biador de calor Bomba Turbina de gas Turbina de vapor 1-0 Conden- sador