Answer Happy

2a (v²av-v²v) + g (22-21) + 2αν + ΣF+Ws = 0 Ws=-nWp Friction Loss in Turbine Water Power System. Water is stored in an elevated reservoir. To generate power, water flows from this reservoir down through a large conduit to a turbine and then through a similar-sized conduit. At a point in the conduit 89.5 m above the turbine, the pressure is 172.4 kPa and at a level 5 m below the turbine, the pressure is 89.6 kPa. The water flow rate is 0.800 m/s. The output of the shaft of the turbine is 658 kW. The water density is 1000 kg/m³. If the efficiency of the turbine in converting the mechanical energy given up by the fluid to the turbine shaft is 89% (n = 0.89), calculate the friction loss in the turbine in J/kg. Note that in the mechanical-energy-balance equation, the W, is equal to the output of the shaft of the turbine over n Ans. F85.3 J/kg P2-P1 P