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NOTE: This is a multi-part question. Once an answer is submitted, you will be unable to return to this part. Consider a combined gas-steam power plant that has a net power output of 280 MW. The pressure ratio of the gas turbine cycle is 11. Air enters the compressor at 300 K and the turbine at 1100 K. The combustion gases leaving the gas turbine are used to heat the steam at 5 MPa to 350°C in a heat exchanger. The combustion gases leave the heat exchanger at 420 K. An open feedwater heater incorporated with the steam cycle operates at a pressure of 0.8 MPa. The condenser pressure is 10 kPa. Assume isentropic efficiencies of 100 percent for the pump, 82 percent for the compressor, and 86 percent for the gas and steam turbines. Determine the thermal efficiency of the combined cycle. The thermal efficiency of the combined cycle is %.

NOTE: This is a multi-part question. Once an answer is submitted, you will be unable to return to this part. Consider a combined gas-steam power plant that has a net power output of 280 MW. The pressure ratio of the gas turbine cycle is 11. Air enters the compressor at 300 K and the turbine at 1100 K. The combustion gases leaving the gas turbine are used to heat the steam at 5 MPa to 350°C in a heat exchanger. The combustion gases leave the heat exchanger at 420 K. An open feedwater heater incorporated with the steam cycle operates at a pressure of 0.8 MPa. The condenser pressure is 10 kPa. Assume isentropic efficiencies of 100 percent for the pump, 82 percent for the compressor, and 86 percent for the gas and steam turbines. Determine the thermal efficiency of the combined cycle. The thermal efficiency of the combined cycle is %.

Sustainable Energy
Sustainable Energy
2nd Edition
ISBN:9781337551663
Author:DUNLAP, Richard A.
Publisher:DUNLAP, Richard A.
Chapter15: Geothermal Energy
Section: Chapter Questions
Problem 19P
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The simple beam with section HE 400 B, whose system and loading condition is given in the figure below, is perpendicular to the strong axis under fixed and live loads, respectively. , wG = 54 kN/m and wQ = 1080 kN/m uniformly distributed load. The pressure-affected beam head is supported laterally on the supports and in the opening. Check the strength controls of the element according to the YDKT and GKT design principles. Steel grade : S275

 

 

 

 

Required information NOTE: This is a multi-part question. Once an answer is submitted, you will be unable to return to this part. Consider a combined gas-steam power plant that has a net power output of 280 MW. The pressure ratio of the gas turbine cycle is 11. Air enters the compressor at 300 K and the turbine at 1100 K. The combustion gases leaving the gas turbine are used to heat the steam at 5 MPa to 350°C in a heat exchanger. The combustion gases leave the heat exchanger at 420 K. An open feedwater heater incorporated with the steam cycle operates at a pressure of 0.8 MPa. The condenser pressure is 10 kPa. Assume isentropic efficiencies of 100 percent for the pump, 82 percent for the compressor, and 86 percent for the gas and steam turbines. Determine the thermal efficiency of the combined cycle. The thermal efficiency of the combined cycle is %.
Transcribed Image Text:Required information NOTE: This is a multi-part question. Once an answer is submitted, you will be unable to return to this part. Consider a combined gas-steam power plant that has a net power output of 280 MW. The pressure ratio of the gas turbine cycle is 11. Air enters the compressor at 300 K and the turbine at 1100 K. The combustion gases leaving the gas turbine are used to heat the steam at 5 MPa to 350°C in a heat exchanger. The combustion gases leave the heat exchanger at 420 K. An open feedwater heater incorporated with the steam cycle operates at a pressure of 0.8 MPa. The condenser pressure is 10 kPa. Assume isentropic efficiencies of 100 percent for the pump, 82 percent for the compressor, and 86 percent for the gas and steam turbines. Determine the thermal efficiency of the combined cycle. The thermal efficiency of the combined cycle is %.
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