TERMODINÂMICA PROBLEMA, Exercícios de Termodinâmica

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5.105 Cogeneration is often used where a steam supply is needed for industrial process energy. Assume a supply of 5 kg/s steam at 0.5 MPa is needed. Rather than generating this from a pump and boiler, the setup in Fig. P6.82 is used so the supply is extracted from the high-pressure turbine. Find the power the turbine now cogenerates in this process. Solution: CN. Turbine. steady state. 1 inlet and 2 exit flows, assume adiabatic. Qev =0 Continuity Eg.6.9: m =, +; Energy Eq 6.10: Qcy + uh = moh +muh;+Wy; Supply state 1: 20 kg/s at 10 MPa. 500"C l Process steam 2: 5 kg/s. 0.5 MPa, 155º€., Exitstate 3: 20kPa x=09 => Mr TableB.1.3: h/=33737. h,=27559k]kg. 3 Table B.12: h,=2514-09x 23583 HP IP =23739 klkg ta Wr=20x33737-5%27550-15x23730=