Unformatted text preview: he effect of varying the turbine cen54261_ch07.qxd 11/18/03 9:58 AM Page 340 340
FUNDAMENTALS OF THERMAL-FLUID SCIENCES fects of the kinetic energy of the flow by assuming an inletto-exit area ratio of 1.5 for the compressor when the compressor exit pipe inside diameter is 2 cm. 8 MPa
ηT = 90% 30 kPa FIGURE P7–95
isentropic efficiency from 0.75 to 1.0 on both the work done
and the exit temperature of the steam, and plot your results.
7–97 Steam enters an adiabatic turbine at 6 MPa, 600°C, and
80 m/s and leaves at 50 kPa, 100°C, and 140 m/s. If the power
output of the turbine is 8 MW, determine (a) the mass flow rate
of the steam flowing through the turbine and (b) the isentropic
efficiency of the turbine.
Answers: (a) 8.25 kg/s, (b) 83.7 percent 7–102 Air enters an adiabatic compressor at 100 kPa and
17°C at a rate of 2.4 m3/s, and it exits at 257°C. The compressor has an isentropic efficiency of 84 percent. Neglecting
the changes in kinetic and potential energies, determine (a) the
exit pressure of a...
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