Steam steadily enters a turbine at h₁ = 3200 kJ/kg and exits wet at 0.1 bar. Heat loss is 100 kJ/kg and work output 1000 kJ/kg; neglect kinetic/potential energy changes. At exit pressure, h_f = 200 and h_fg = 2400 kJ/kg. Find exit dryness fraction to two decimals.
With heat into the turbine positive, q = −100. Steady-flow energy gives $h_2=h_1+q-w=3200-100-1000=2100$ kJ/kg. For wet steam, $h_2=h_f+xh_{fg}$, so $x=(2100-200)/2400=0.79167$. **0.79**.
More Thermal and Fluids Engineering questions
GATE 2023 PI Q60– Water flows in a 0.02 m diameter pipe at Reynolds number 1000. The pipe is heated…
GATE 2023 PI Q61– In an ideal air-standard Brayton cycle, compressor inlet is 100 kPa and 300 K. Thermal…
GATE 2022 PI Q27– Water of kinematic viscosity 1 × 10⁻⁶ m²/s flows through an 8 mm horizontal circular pipe.…
GATE 2022 PI Q48– Air initially at 15°C, 1 bar is heated irreversibly to 303°C, 2 bar. Treat it as…
GATE 2021 PI Q26– Which dimensionless number is the ratio of inertial to viscous force?
GATE 2021 PI Q32– A refrigerator removes heat at 300 kJ/min to maintain its inside at 2°C. Input power is 2…