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A submersible deep-well pump delivers
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- What is the horsepower requirement for a water pump, if the required flow rate is 200 gpm and the required pressure increase assigned to the pump is 32 psi?arrow_forwardIn Fig. there are 125 ft of 2-in pipe, 75 ft of 6-inpipe, and 150 ft of 3-in pipe, all cast iron. There are three90° elbows and an open globe valve, all flanged. If the exitelevation is zero, what horsepower is extracted by the turbinewhen the flow rate is 0.16 ft3/s of water at 20°C?arrow_forwardThe pump shown is 75% efficient. If the pressure rise is 120 psi, calculate the required energy input in horsepower.arrow_forward
- The San Francisquito plant no. 1 is supplied by 3 steel-lined penstocks each 80 inches in diameter that carries a combined volumetric flow rate of 712 ft3/s. Assuming water at 80°F find a)Head loss (in feet) due to viscous effect . Include both major and minor losses. b)Your estimate of the power generation potential in MW.arrow_forwardWater at 60°F is pumped from a reservoir to the top of a mountain through a 6-in. Schedule 120 pipe at an average velocity of 12 ft/s. The pipe discharges into the atmosphere at a level 3,000 ft above the level in the reservoir. The pipeline itself is 4,500 ft long. If the overall efficiency of the pump and the motor driving it is 70 percent and the cost of electric energy to the motor is 4 cents per kilowatt hour, what is the hourly energy cost for pumping this water?arrow_forwardPumps: A centrifugal pump having 4 stages in parallel, delivers 18 kiloliters/min of liquid against a head of 25 m. The diameter of the impellers being 24 cm and the speed of 1800 rpm. A pump is to be made up with a number of stages in series of similar construction to that of the first pump to run at 1250 rpm and to deliver 15 kiloliters/min against a totalhead of 250 m. Find the diameter of the impellers and the number of stages required in this case. Answer: D = 46.63 cm, n = 6 stagesarrow_forward
- An existing pump is used to pump water with the following data at BEP: D = 2.15 in, N = 1784 rpm, ρ = 998 kg/m3, Q = 18 gpm, H = 4.2 ft. A larger pump is to be designed based from the existing one to be used for pumping slurry (ρ = 1220 kg/m3) such that its best efficiency point occurs as close as possible to a volume flow rate of 48 gpm and at a net head of 15 ft. Calculate the new pump diameter in inches. Round off your final answer to 3 decimal places.arrow_forwardA submersible pump of 80 percent efficiency is used in pumping water with flow rate,Q from a river to a pool at an elevation, h. The frictional losses is assumed with losscoefficient, K = 10. By the aid of a labelled diagram, derive an expression on thepower require to drive the pump.arrow_forwardA centrifugal pump delivers 0.071 m3/s of water against a head of 7.6-m at 1450 rpm and requires 6.7 kW. If the speed is reduced to 1200 rpm calculate the flow (in m3/s), assuming the same efficiency.arrow_forward
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