QUESTION 7 A prototype Pelton wheel turbine is to operate under a head of 350 m...
A Pelton wheel turbine (at maximum efficiency) is designed for a water head H of 80 ft. The wheel having a diameter of 5 ft with a rotating speed of the wheel is 130 rpm. The nozzle efficiency is: Select one: a. 0.8 b. 0.9 C. 0.86 O d. 0.95
A Pelton wheel with an efficiency of 85% is used to produce hydroelectric power from flow of water behind a dam with an elevation head of 420 m. The average radius of the wheel and its angular velocity are 2.0 m and 220 rpm, respectively. This turbine works at its optimum rotation rate (which produces maximum power). The turning angle of the buckets is ? = 165° and nozzle diameter is given as 8.00 cm. a. Calculate volumetric flow rate...
(1) Hydraulic turbines convert the potential energy of water into shaft work, which, in turn, rotates the electric generator coupled to it in producing electric power. Pelton turbine named after Lester Allen Pelton of the USA, an impulse turbine used for high head and low discharge. In an impulse turbine all the available head of water is converted into kinetic energy in a nozzle. The water shoots out of the nozzle in a free jet into a bucket which revolves...
Water under a head of 300 m is available for a hydel-plant situated at a distance of 2.35 km from the source. The frictional losses of energy for transporting water is equivalent to 26 m. A number of Pelton wheels are to be installed generating a total output of 18 MW. Determine the number of units to be installed, diameter of Pelton wheel and the jet diameter when the following data are available: Wheel speed 650 rpm.; ratio of bucket...
Mechanical lab please answer all steps 2. A Pelton wheel is used to produce hydroelectric power and the performance 62.4 lb/ft data are collected in the following table. Specific weight of water 1 hp 550 ftlb/s. Water supply line pressure Turbine speed Shaft torque (lbft) Flow rate (cfm) (psig 80 300 50 If water supply pipe diameter is 20 inches and turbine wheel radius is 20 inches, calculate the hydraulic head in ft, jet velocity, speed ratio, hydraulic horse power,...
theavton the ump.if the absolute pressure of the liquid drops below the vapor pressure then cavitation will occur Answer B) False A) True A centrifugal pump delivers water against a net head of 20 meters and a design speed of 1100 rpm. is 10 m/s. he impeller diameter is 0.4 m. Determine manometric efficiency of the pump, if Co2 Intr E) 95% D) 92% A) 85% C) 90% B) 88% Answer In Calculate net head or effective head for Pelton...
A 1/4-scale model centrifugal pump is tested to pump water with density of 1000 kg/m under a head of 7.5 m at speed of 500 rpm. It was found that 7.5 kW was needed to drive the model. Assuming the pumps is geometrical similar and similar mechanical efficiency, determine; (i) speed and power required by the prototype when pumping against a head of 44 m; ratio of the discharges between model and prototype; and head, capacity and power coefficient of...
Can you, after 10 hours from now, solve another question? Pu. 9. In Pelton wheel installation a small auxiliary nozzle is often fitted, from which a jet of high pressure water can f the buckets, thus acting as a brake and bringing the wheel quickly to reset. Estimate the time required to stop the wheel by the brake nozzle under the following conditions: diameter of brake nozzle = 7 cm, head at the nozzle = 475 m, original velocity of...
03-6: A Pelton wheel is supplied with 1.2 kg/sec of water at 20 m/sec. the buckets rotates on a mean diameter of 250 mm at 800rev/min. The deflection angle is 165° and friction is negligible. Determine the diagram power. Draw the vector diagram to scale and determine Δ v
1.7 The specific speed of a Kaplan turbine is 450 when working under a head of 12 m at 150 rpm. If under this head, 30,000 kW of energy is generated, estimate how many turbines should be used (7 turbines).