Determine the efficiency of a water turbine The buckets of a Pelton wheel revolve on a...
Determine the efficiency of a water turbine
The buckets of a Pelton wheel revolve on a mean diameter of 2.0 m at 1600 rev/min. The jet
velocity is 1.5 times the bucket velocity. The water flow rate required to produce a
power output of 2.5 MW is 120 kg/s. The blade friction coefficient is 0.97. The deflection angle is 165⁰ .
Determine the efficiency of the water turbine.
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Determine the efficiency of a water turbine
The buckets of a Pelton wheel revolve on a...
A Pelton wheel installation uses a water jet of 75mm diameter to drive a wheel with...
A Pelton wheel installation uses a water jet of 75mm diameter to drive a wheel with the buckets on a diameter of 0.9m. The deflection angle of the buckets is 160 o .The relative velocity of the water is reduced by 12% while moving across the buckets. The rotational 8 speed is 320rpm, the total pressure behind the nozzle is 0.7Mpa and the velocity coefficient of the nozzle is 0.98. Determine 5.1 the hydraulic power developed by the wheel, 5.2...
In an impulse turbine of the Pelton type, the jet is turned by the bucket by...
In an impulse turbine of the Pelton type, the jet is turned by the bucket by 165°. The head available at the nozzle is 750 m and blade speed ratio is 0.46. Cv = 0.98. Relative velocity is reduced by 12% due to friction. Determine the hydraulic efficiency. If the flow available is 20 m3/s. What is the power potential. Assuming 5 units of equal power, determine the jet diameter and wheel diameter if d/D = 12.
03-6: A Pelton wheel is supplied with 1.2 kg/sec of water at 20 m/sec. the buckets...
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
A Pelton wheel with an efficiency of 85% is used to produce hydroelectric power from flow...
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...
Design a hydropower scheme using Pelton wheel turbine(s) to generate 2 MW of power. Assume an...
Design a hydropower scheme using Pelton wheel turbine(s) to generate 2 MW of power. Assume an efficiency for the turbine and justify any coefficients and/or parameters that is used in the design. The hydropower scheme should provide the following information: (a) Volumetric flow rate of the turbine (b) Number of jets (c) Velocity of the jet (d) Size of each jet (e) Size of the Pelton wheel
A Pelton wheel turbine (at maximum efficiency) is designed for a water head H of 80...
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
Water under a head of 300 m is available for a hydel-plant situated at a distance...
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...
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,...
Can you, after 10 hours from now, solve another question? Pu. 9. In Pelton wheel installation...
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...
Question 3: (a) Name four parts of a centrifugal pump and explain their respective function [6...
Question 3: (a) Name four parts of a centrifugal pump and explain their respective function [6 marks] (b) A 97% efficiency, 10kW motor is powering a 95% overall efficiency centrifugal pump with head loss of 0.75m and Mechanical loss of 90W. Find the water leakage rate if the flow rate is 0.025m'/s. The gravity constant is g 9.81m/s and the density of water is p 998kg/m3 [6 marks] (c) A water jet of diameter 50mm is striking a Pelton wheel...
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
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
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,...
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...
Question 3: (a) Name four parts of a centrifugal pump and explain their respective function [6 marks] (b) A 97% efficiency, 10kW motor is powering a 95% overall efficiency centrifugal pump with head loss of 0.75m and Mechanical loss of 90W. Find the water leakage rate if the flow rate is 0.025m'/s. The gravity constant is g 9.81m/s and the density of water is p 998kg/m3 [6 marks] (c) A water jet of diameter 50mm is striking a Pelton wheel...
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