Using Exergetic EfficienciesFor the turbine-compressor arrangement of Problem 6.164, deter...

Using Exergetic Efficiencies

For the turbine-compressor arrangement of Problem 6.164, determine the exergetic efficiency for (a) the turbine, (b) the compressor, (c) an overall control volume enclosing the turbine and compressor. Let T0 = 300 K.

Problem 6.164

Using Isentropic Processes/Efficiencies

As shown in Fig. P6.164, a steam turbine having an isentropic turbine efficiency of 90% drives an air compressor having an isentropic compressor efficiency of 85%. Steady-state operating data are provided on the figure. Assume the ideal gas model for air, and ignore stray heat transfer and kinetic and potential energy effects.

(a) Determine the mass flow rate of the steam entering the turbine, in kg of steam per kg of air exiting the compressor.

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(b) Repeat part (a) if ηt = ηc = 100%

Fig. P6.164