• # question_answer Optimum pressure ratio for maximum specific output for ideal gas turbine plant operating at initial temperature of 300 K and maximum temperature of 1000 K is closer to: A) 4                                 B) 8C) 12                                D) 16

Maximum possible pressure ratio, ${{r}_{p}}={{\left( \frac{{{T}_{2}}}{{{T}_{1}}} \right)}^{\frac{\gamma }{\gamma -1}}}={{\left( \frac{1000}{300} \right)}^{3.5}}=67.62$ Pressure ratio for maximum output = $\sqrt{{{r}_{p}}}$ $=\sqrt{67.62}\,=8.22=8$