A small, high-speed turbine operating on compressed air produces a power output of 100 W. The inlet state is 400 kPa, 50°C, and the exit state is 150 kPa, −30°C. Assuming the velocities to be low and the process to be adiabatic, find the required mass flow rate of air through the turbine.
C.V. Turbine, no heat transfer, no ∆KE, no ∆PE
Energy Eq. hin = hex + wT
Ideal gas so use constant specific heat
The dentist’* drill has a small air flow and is not really adiabatic.
