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Problem 5-1 - Example 5-1 Carbon dioxide at 500F and 210...

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Example 5-1 Carbon dioxide at 500°F and 210 psia enters a well- insulated turbine. The exit pressure is 5 psia and the mass flow rate is 22 lbm/s. If the work output is 850 hp, calculate the turbine efficiency. Solution: The actual work done by an adiabatic turbine is ( ) 1 2 W m h h = ± ± 1 Btu enthalpy(CO2, 500) 3749 lbm h T = = = − Solve for h2, 2 1 W h h m = ± ± ( ) 2 Btu 2544 h 850 hp 1 hp Btu Btu 3749 3776 lbm 3600 s lbm lbm 22 s 1 h h = = −
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