Problem- A centrifugal pump delivers water against a net head of 14.5 m and a design speed of 1000 r. p. m. The vanes are curved back to an angle of 30° with the periphery. The impeller diameter is 300 mm and outlet width is 50 mm. The manometric efficiency is 95%. Find the discharge Q of the pump.
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- The discharge through pump 10m^3 per second and total head is 100 ft. Find unit power of pumpIf the flow of 0.10 m3/s of water (mu = 1.31 x 10-3 Pa.s) is to be maintained in the system shown, what power must be added to the water by the pump? The pipe is made of steel and is 15 cm in diameter. Neglect minor losses. TVA reservoir A with elevation 30m connected with a pump to rise the water into two reservoirs B and C 90m and 60 m respectively the amount of flow from J to B is equal 0.11 m/sec use the following data to determine the flow in each pipe and the power of the pump: LAJ 450 m, DaJ = 300 mm, LJB= 300 m, DJB = 200 m, Q JB = 0. m'/sec, LJc 600, D Jc = 150 mm,f (all Pipes) 0.02
- A pump draws water from a 20 cm diam suction pipe and discharges through a 15 cm diam pipe in which the velocity is 3.60 m/s. The pressure is – 34. 465 kPa at A in the suction pipe. The 15 cm diam pipe discharges horizontally into air at C inclined at 45 degrees. Find the maximum height and range that the water can reach if B is 1.8 m. above A and 20 hp is delivered to the pump? Assume that the pump operates at 80 % efficiency and that the frictional loss in the pipe between A and C is 3 m.5.10 The water is supplied at the rate of 3 m3 per minute from a height of 4 m to a hydraulic ram, which raises 0.3 m3/minute to a height of 30 m from the ram. The length and diameter of the delivery pipe is 100 m and 70 mm respectively. Determine the D' Aubuisson's efficiency of the hydraulic ram if the co-efficiency of friction f = .009.For water supply of a town, water is pumped from a river 4km away into a reservoir. The maximum level difference of river and reservoir is 20m. Town population is 50,000 and per capita water demand is 120 lpcd. If the pumps operate for a total of 8hrs and pump efficiency is 60%, calculate pump B.H.P Assume friction factor as 0.0075 and pipe velocity as 2m/s and maximum daily demand as 1.6 times avg. daily demand.
- Water flows through a set of pipes from a reservoir to the point of use, 12.5 m below thewater surface of the reservoir. The first pipe has a diameter and length of 125 mm and 20 mrespectively. The second pipe has a diameter of 175 mm. Determine the length of the secondpipe if a flow rate of 0.065 m3/s is required at the outlet of the second pipe. The first pipehas a friction coefficient of 0.008 (Darcy) and the second pipe has a friction coefficient of0.005 (Darcy). Consider all losses.A pump is used to raised water to a reservoir through 1000 m. long of 20 cm diameter with Cw of Hazen-William's Equation equal to 100. If the pipe is to be replaced with a new one having the same length but with a diameter of 25 cm and Cw= 120, determine the power save if the flow is to be maintained at 75liters per second. Draw the approximate EGL and HGLwater from reservoir is pumped over a hill through a pipe 90cm in diameter and a pressure of 200kpa is maintained at the summit where the pipe is 90 m above the reservoir. the quantity pumped is 1.40m/s and by reason of friction there is a head loss of 3 J/N between reservoir and summit. if the pump is 90% efficient, determine the input power of the pump
- A single-acting reciprocating pump, running at 50 r.p.m. has a flow rate of 0.01 m3/s of water. The diameter of the piston is 200 mm and stroke length 400 mm. Calculate: i) The theoretical discharge of the pump, ii) Co-efficient of discharge, and iii) Slip and theA pump draws water from a 20 cm diam suction pipe and discharges through a15 cm diam pipe in which the velocity is 3.60 m/s. The pressure is – 34. 465 kPaat A in the suction pipe. The 15 cm diam pipe discharges horizontally into air atC. To what height h above B can the water be raised if B is 1.8 m. above A and20 hp is delivered to the pump? Assume that the pump operates at 80 %efficiency and that the frictional loss in the pipe between A and C is 3 m. Determine the inclination angle at point C for the water stream to reach a range of 50 m. Also, calculate the maximum height that the water can go from the selected datum plane.A centrifugal pump which runs at 104.3 rad ·s−1 (16.6 rev/s) is mounted so that its centre is 2.4 m above the water level in the suction sump. It delivers water to a point 19 m above its centre. For a flow rate of Q (m3 ·s−1) the friction loss in the suction pipe is 68Q2 m and that in the delivery pipe is 650Q2 m. The impeller of the pump is 350 mm diameter and the width of the blade passages at outlet is 18 mm. The blades themselves occupy 5% of the circumference and are backward-facing at 35◦ to the tangent. At inlet the flow is radial and the radial component of velocity remains unchanged through the impeller. Assuming that 50% of the velocity head of the water leaving the impeller is converted to pressure head in the volute, and that friction and other losses in the pump, the velocity heads in the suction and delivery pipes, and whirl slip are all negligible, calculate the rate of flow in liter/s and the manometric efficiency of the pump.