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Engineering, 27.11.2019 00:31 maxy7347go

Acombined gas-steam power cycle uses a simple gas turbine for the topping cycle and simple rankine cycle for the bottoming cycle. for the topping cycle, air enters to the compressor at the temperature of 293 k and experiences a compression ratio of 8 with efficiency of 0.85. the temperature of air after the combustion reaches to a maximum of 1100degree c. the air experiences an expansion ratio of 8 with efficiency of 0.9 in the turbine. the air at the outlet of turbine flows through a heat exchanger to transport thermal energy to the bottoming cycle and leaves at a temperature corresponding to water saturation temperature at 6 mpa. for the bottoming cycle, water enters in the saturated state at pressure of 20 kpa to an ideal pump. the vapor at the inlet of turbine is at 320degree c and 6 mpa. the vapor goes through a turbine with isentropic efficiency of 0.9. the properties of air at room temperature are c_p = 1.005 kj/kg-k and k= 1.4 show the t-s diagram of this combined cycle. determine the net work of the topping and bottoming cycles. determine the mass flow rate of ah' for a power output of 100 mw.

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