a 150 mm diameter penstock supplies water to a turbine under a constant head of 30m. the power (kw) delivered by the the turbine if the system efficiency is 70%
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a 150 mm diameter penstock supplies water to a turbine under a constant head of 30m. the power (kw) delivered by the the turbine if the system efficiency is 70%
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- Water 300 mm d 300 mm Problem 4.113 4.113. This turbine develops 75 kw when the flowrate is 0.6 m's what flowrate may be expected if the turbine is removed?8-147 In a hydroelectric power plant, water at 20°C is supplied to the turbine at a rate of 0.55 m³/s through a 200-m-long, 0.35-m-diameter cast iron pipe. The elevation difference between the free surface of the reservoir and the tur- bine discharge is 140 m, and the combined turbine-generator efficiency is 85 percent. Disregarding the minor losses because of the large length-to-diameter ratio, determine the electric power output of this plant.The change in head across a small turbine is 10 m, the flow rate of water is 1 m³/s and the efficiency are 80%. The power developed by the turbine is approximately:
- PROBLEM E A hydroelectric power plant operates under a discharge of 500 cfs with 90 % turbine efficlency. The overall head loss Is 1.5 times the velocity head In the 7-ft-dlameter penstock. With the conditions stated, determine the following: (a) the velocity (ft/s) In the penstock, (b) the head loss (ft). (c) the head (ft) extracted by the turbine, (d) the power Input (hp) to the turbine, and (e) the power output (hp) expected from the turbine. 30 ft Water d=7 ft 5 ftA hydroelectric power plant operates under a discharge of 500 cfs with 90 % turbine efficiency. The overall head loss is 1.5 times the velocity head in the 7-ft-diameter penstock. With the conditions stated, determine the following: (a.) the power input (hp) to the turbine, and (b.) the power output (hp) expected from the turbine. 30 ft Water d = 7 ft 5 ftA powerhouse is equipped with impulse turbines of Pelton type. Each turbine delivers a power of 14 MW when working under a head of 900 m and running at 600 rpm. Find the diameter of the jet and the mean diameter of the wheel. Assume that overall efficiency is 89%, velocity coefficient of jet 0.98, and speed ratio 0.46. (Answer: 132 mm, 1.91 m; respectively)
- Water from a large tank enters into a pipe and discharges to the atmosphere through a nozzle connected at the other end of the pipe. The tip of the nozzle is located 240 m below the water surface in the reservoir. The jet formed at the tip of the nozzle has a diameter of 100 mm and velocity of 60 m/s. Neglecting minor losses, a) Compute the power produced by the jet in hpb) compute the power lost due to friction in the pipeA hydraulic turbine develops 5000 kW under a head of 30 m when running at 100 rpm. This turbine belongs to the category of A Pelton wheel B Francis Turbine C Kaplan Turbine D Propeller TurbineA pipe is used to deliver water at a rate of 3.8 m³/s from the intake to the turbine. The difference in elevation between the intake’s water surface and the turbine is 200 m. Knowing the headloss in the pipeline from the intake to the turbine is 8 m, find the power (in kW) generated by the turbine if its efficiency is 80%.
- 8. Energy Equation Water at the Lake William Dam enters a hydraulic turbine through a 30 cm diameter pipe at a rate of 0.6 m³/s and exits through a 25-cm diameter pipe. For the system, elevation effects are negligible and the pressure drop across the turbine is measured to be 148 kPa. For a combined turbine-generator efficiency of 83 percent, calculate (a) hurbine and (b) Wubrine- You look in the FE handbook and see: W turbine = 7/turbine-gen”ightutine, e turbine-genhtubine, e 30 cm diameter 25 cm diameter Turbine Generator(A) A furbine develops 9000 kW when running at 10 r.p.m. The heud on the turbine is 30 m. If the head on the turbine is reduced to 18 m, determine the speed and power devetoped by the turbinc.A reaction turbine discharge 35 m³/sec under a head of 9 m and with an overall efficiency of 91%. The power developed in kW is: 1. 2. 3. 4. 2812.04 kW 367.77 kW 37.49 kW 281.20 kW