Q2/ If the turbine extracts 400 kW from the flow, what flowrate must be passing through the system? Water El. 105 600 m -0.6 m d-/ 0.020 T 600 m El. 30
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- A turbine develops 10 MW under a head of 25 m at 135 rpm. a) What is the specific speed? b) What would be its normal speed for a head of 20 m c ) it's output under a head of 20 m?A Kaplan turbine working under a head of 43 m deve-lops 15,400 B.H.P. The dia of theboss is 0"3 times the dia ofrunner. Determine the speed and dia of runner, if speed ratio is2, flow ratio as 0-65 and overall efficiency as 91%.A centrifugal pump delivers 25 liters of water per second against a head of 10 meters and running at 1300 rpm requires 10 kW of power. Determine the discharge, head of the pump and power required if the pump runs at 1500 rpm. (Ans. 0.0288cumec or 1.73 cu.m./min , 13.31m, 15.36kw)
- Q-) It has been announced that a water turbine with a net head of H0 = 10m and a speed of n = 380 rpm will produce a power of Nef = 200 PS. The overall efficiency guaranteed by the manufacturer of the turbine is 76%. Answer the following questions of a customer reading this advertisement. A-)What is the type of this turbine? Is a net drop of H0 = 10m suitable for this turbine? B-)How much flow is needed for this turbine? C-)Is it ok to run the same turbine at H0 = 7.5m drop? D-)How fast should the turbine be rotated in this new fall? E-)How much flow is needed in this new fall? F-)What will be the turbine power in this new fall? (Turbine overall efficiency can be considered equal to the initial state)A Kaplan turbine of 100 B.H.P. is working under a headof 5 in and running at 210 R.P.M.The discharge through the tur.bine is 1*80 m°/sec.If now the turbine is allowed to work under a head of 15 m,what would be its new speed, discharge and power ?How is the specific speed used to predict hydraulic turbine performance?
- Which of the ff are assumptions followed by the Bernoulli eq ? the pump is working at 100% efficiency , skin friction is negligible, the flow of the fluid is strictly turbulent, the velocity head is negligibleWater reservoir A (El. 13.5m) to reservoir B (El. 51.3) is lifted at the rate of 30000L/min. The intake pipe is 250mm. The discharge pipe is 200mm . Assuming the pipes are made of wrought iron, and the pump to be used runs at 1800 rpm, determine: a. the pump to be used; b. the number of stages to be used for the pump to operate at maximum efficiency.It is desired to develop a 5 MW turbine under an effective head of 320 m. The turbine efficiency is85%. Velocity coefficient of the nozzle is 99%.(a)Select which is the appropriate turbine based on effective head.(b)What should be the wheel diameter in meters assuming it is 12 times the diameter of the jet?
- A certain hydropower plant is being supplied by river flow of 900 cubic ft/sec and the head on the site is 200 ft. To develop maximum capacity it was proposed to install 2 turbines, one of which is 1.5 times the capacity of the other. Both turbine units are assumed to have efficiency of 85%. Determine (a) the total power developed, (b) what is the power developed by turbine #1 and by turbine #2 and (c) Rotative speed of each turbine unit assuming specific speed equal to 70 rpm.Drive Velocity Triangle For Axial Mixed Flow For Francis Turbine.A lift pump was used to collect water at 60 strokes per minute and 50 liters was collected. The lift pump has a bore of 10 cm and stroke of 15 cm. What is the volumetric efficiency of the lift pump?