Open gas turbines plants are quickly put into operation to cover peak loads in electricity consumption...

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Open gas turbines plants are quickly put into operation to cover peak loads in electricity consumption (further explanation in chapter 5). In this process, an air volume flow -100 m/s is irreversibly adiabatically compressed from the ambient state ( -20 C. p. 1 bar) to 15 bar. During this compression, the air heats up to 420 C. Subsequently, heat is supplied at constant pressure until the air reaches a temperature of 1200 C. The air is then irreversibly adiabatic expanded in the gas turbine (isentropic efficiency -0.93) to ambient pressure. The air can be considered an ideal gas. 1.0049 kJ/(kg-K) R-0.2871 kJ/(kg-K) a) Sketch the flow scheme and record all given data. b) Schematically illustrate the process in a 7.1-diagram and a h,s-diagram. c) Determine the mass flow of air. d) Determine the power of the air compressor and the isentropic compressor efficiency. e) Determine the temperature at the gas turbine outlet and the power output of the gas turbine. f) Determine the power loss in the turbine compared to an adiabatic reversible expansion. g) Determine the irreversible specific entropy difference As, in the turbine. h) Determine the supplied heat flow and the effective power Per- (Pr+ Pc) of the gas turbine plant. i) Which part of the received heat flow could be converted into effective power Peat? Open gas turbines plants are quickly put into operation to cover peak loads in electricity consumption (further explanation in chapter 5). In this process, an air volume flow -100 m/s is irreversibly adiabatically compressed from the ambient state ( -20 C. p. 1 bar) to 15 bar. During this compression, the air heats up to 420 C. Subsequently, heat is supplied at constant pressure until the air reaches a temperature of 1200 C. The air is then irreversibly adiabatic expanded in the gas turbine (isentropic efficiency -0.93) to ambient pressure. The air can be considered an ideal gas. 1.0049 kJ/(kg-K) R-0.2871 kJ/(kg-K) a) Sketch the flow scheme and record all given data. b) Schematically illustrate the process in a 7.1-diagram and a h,s-diagram. c) Determine the mass flow of air. d) Determine the power of the air compressor and the isentropic compressor efficiency. e) Determine the temperature at the gas turbine outlet and the power output of the gas turbine. f) Determine the power loss in the turbine compared to an adiabatic reversible expansion. g) Determine the irreversible specific entropy difference As, in the turbine. h) Determine the supplied heat flow and the effective power Per- (Pr+ Pc) of the gas turbine plant. i) Which part of the received heat flow could be converted into effective power Peat?