What is the unit power of the turbine?
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- What is the turbine output of 100m head and delivering 1 cu. m/ sec in a hydro electric power plant if turbine efficiency is 88%?A Pelton wheel develops 70 kW under a head of 60 m of water. It rotates 400 rpm. Overall efficiency is 80%. Find the discharge rate in m³/s. Use the equation below, where P is power of the turbine shaft and no is the overall efficiency, where specific weight of water is is 9.80 kN/m³ no P YQH A generator is driven by a small, single-jet Pelton turbine designed to have a power specific speed sp 0.20. The effective head at nozzle inlet is 200 m and the nozzle velocity coefficient is 0.985. The runner rotates at 880 rev/min, The turbine overall efficiency is 80%. Find (a) the power delivered by the shaft of the turbine and (b) find the power delivered by the water to the turbine. where density of water is 1000 kg/m³ and g is 9.80 m/s². Use Stup Ω P/p (gHE)* Overall efficiency ne and Power developed at turbine shaft hydraulic power P YQHNOTE THE ANSWER SHOULD BE 10.75m3/s Find the flow rate of water through the sytem shown for the turbine to produce 20 kW. Neglect friction in your calculations NOTE: THE ANSWER SHOULD BE 10.75m3/s
- A Pelton wheel turbine is to operate under a head of 25 m at 200 r.p.m. If the discharge is 9 m /s and turbine efficiency is 90%. Calculate power generated by the turbine, specific speed of the turbine and performance of turbine under a head of 20 m. Also state the type of turbine.In a large pumped hydro plant, the head from the turbine to the lake surface is 100m. During a period of 8 hours of excess electricity in the grid the pumped hydro plant pumps water back into the top reservoir. If the combined efficiency of the pump is 70% and the plant has a capacity of 50 MW how much water is pumped back up to the top reservoir? Assume the head remains constant during pumping. A. 0.5 x 10 – 1.0 x 10 m B. 1.1 x 10 – 1.5 x 10° m C. 1.6 x 105 - 2.0 x 10 m D. 2.1 x 10° - 2.5 x 10 m3A reaction turbine has guide vanes at an angle of 30° and the runner blades make an angle of 80° relative to the tangent at inlet. The blades width at the inlet is 4 of the outer diameter. The water does not have any tangential velocity at the outlet. The head is 25 m and the rotational speed of the runner is 16.67 rotations per second. The turbine efficiency is 88 %. Determine the turbine runner diameter at the inlet and the power developed.
- A rection turbine has guide vane angle 30° the runner blades make an angle of 80° relative to the tanget at inlet .the blades width at inlet is 1/4 of the outer diameter .the water does not have any tanget velocity at outlet.the head is 25 m and the rotational speed of the runner is 16.67 rotation per second (rps) the turbine efficiency is 88% determine the runner diameter at the inlet and the power developed by this turbine3. For a Pelton turbine the pressure of the flow before the nozzle is 5 bar while the velocity of flow leaving the nozzle is 31m/s. If the speed of the turbine is 500 rpm and the wheel diameter is 1.5 m, the efficiency of the nozzle will be: а. 0.96 b. 0.97 c. 0.98 d. 0.99 e. None of the them.A reaction turbine is working under a head of 10 m with an average discharge of 700 m'/min. The overall efficiency is 90 % and the generator speed is 200 rpm. Find its specific speed. 3
- An impulse turbine of 3 m diameter is rated at 10000 kW at 300 rpm under a head of 500 m. The turbine is operated under the head of 400 m. What is the power developed?NOTE: THE ANSWER SHOULD BE Q=10.75 m3/s Find the flow rate of water through the system shown for the turbine to produce 20 kW. Neglect friction in your calculations115 m turbine 2 In the above example problem, a hydroelectric turbine at the base of a dam is shown schematically. The height of the water above the turbine station given as 115 m. This turbine produces 4.6 MW of electricity, and you may assume the losses in the system to be equivalent to 10 m of head of water. The diameter of the pipe at the turbine exit is 0.75 m, and the velocity of water exiting from the pipe is 12.5 m/s. Caleulate the efficiency of the turbine.