For the production of high-speed trains at the SIEMENS company in Krefeld, considerable amounts of electrical energy are required. A gas turbine is operated to provide this. In the gas turbine with an air mass flow of 68 kg / s and a fuel mass flow of 3 kg /s, air is sucked in at an ambient pressure of 1.09 bar and a density of 1.18 kg / m. After the combustion chamber there is a temperature of 1114 Cand the exhaust gas temperature after the turbine is given as 451 C. The isentropic efficiency of the turbine and the compressor is 0.8 each. Material values are constant for this task: K (for air and exhaust gas) = 1.4 C air = 1.007 k / (kg K) Cp exhaust gas = 1.1 kJ / (kg K) R eshaust gas = 272.8 J/ (kg K) RAir = 287 J/ (kg K) a) Calculate the exhaust gas temperature after isentropic exparnsion. Enter the value in C with one decimal place. Reply: b) Calculate the pressure ratio in the turbine. Enter the value with 2 decimal places. (For your calcuiation you have to calculate with an exhaust gas temperature after isentropic expansion of 400 C) Reply: e) Calculate the ambient temperature, Enter the value in * C with 2 decimal places. Reply:

For the production of high-speed trains at the SIEMENS company in Krefeld, considerable amounts of electrical energy are required. A gas turbine is operated to provide this. In the gas turbine with an air mass flow of 68 kg / s and a fuel mass flow of 3 kg /s, air is sucked in at an ambient pressure of 1.09 bar and a density of 1.18 kg / m. After the combustion chamber there is a temperature of 1114 Cand the exhaust gas temperature after the turbine is given as 451 C. The isentropic efficiency of the turbine and the compressor is 0.8 each. Material values are constant for this task: K (for air and exhaust gas) = 1.4 C air = 1.007 k / (kg K) Cp exhaust gas = 1.1 kJ / (kg K) R eshaust gas = 272.8 J/ (kg K) RAir = 287 J/ (kg K) a) Calculate the exhaust gas temperature after isentropic exparnsion. Enter the value in C with one decimal place. Reply: b) Calculate the pressure ratio in the turbine. Enter the value with 2 decimal places. (For your calcuiation you have to calculate with an exhaust gas temperature after isentropic expansion of 400 C) Reply: e) Calculate the ambient temperature, Enter the value in * C with 2 decimal places. Reply:

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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