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Water vapor at 6 MPa, 600°C enters a turbine operating at steady state and expands adiabatically to 10 kPa. The mass flow rate is 2 kg/s and the isentropic turbine efficiency is 94.7%. Kinetic and potential energy effects are negligible. Determine
(a) the power developed by the turbine, in kW.
(b) the rate at which exergy is destroyed within the turbine, in kW.
(c) the exergetic turbine efficiency. Let T0 5 298 K, p0 5 1 atm.
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Hydrogen is contained in a piston-cylinder device at 14.7 psia and 15 ft3. At this state, a linear spring (Flux) with a spring constant of 15,000 lbf/ft is touching the piston but exerts no force on it. The cross-sectional area of the piston is 3 ft2..
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