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For the centrifugal water pump of Prob. 14-29, plot the pump's performance data: H (m), bhp (W), and (percent) as functions of
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Fluid Mechanics: Fundamentals and Applications
- A pump, geometrically similar to the 12.95-in model in Fig. P11.24,has a diameter of 24 in and is to develop 30 hp at BEP when pumping gasoline (not water).Determine (a) the appropriate speed, in r/min; (b) the BEP head, in ft; and (c) the BEP flowrate, in gal/min.arrow_forwardFlow turbulence and cavitation in a centrifugal pump generate a similar sound to the human ear. Explain how vibration analysis would help you to determine which is which.arrow_forwardThe 28-in-diameter pump in Fig. at 1170 r/min isused to pump water at 20°C through a piping system at14,000 gal/min. (a) Determine the required brake horsepower.The average friction factor is 0.018. (b) If there is65 ft of 12-in-diameter pipe upstream of the pump, how farbelow the surface should the pump inlet be placed to avoidcavitation?arrow_forward
- A centrifugal pump delivers 25 liters of water per second against a head of 10 meters and running at 1300 rpm requires 10 kW of power. Determine the discharge, head of the pump and power required if the pump runs at 1500 rpm. (Ans. 0.0288cumec or 1.73 cu.m./min , 13.31m, 15.36kw)arrow_forwardExplain why some pump performance curves may lead tounstable operating conditions.arrow_forwardThis problem is useful for the preliminary design of a hydroturbine. From the material learned in this chapter, it is fairly simple to estimate how much power a hydroturbine can generate, given only the flow rate of water and the elevation difference upstream and downstream of the dam. A dam has a gross head of 15.5 m and a flow rate of 0.22 m3 /s. Approximating the overall efficiency of the turbine/generator to be 75%, estimate the electrical power (in kW) that couldbe produced.arrow_forward
- To avoid the bulky tower and impeller and generator inthe HAWT of the chapter-opener photo, we could insteadbuild a number of Darrieus turbines of height 4 m anddiameter 3 m. (a) How many of these would we need tomatch the HAWT’s 100 kW output for 15 m/s wind speedand maximum power? (b) How fast would they rotate?Assume the area swept out by a Darrieus turbine is twothirdsthe height times the diameter.arrow_forwardThe head-discharge relationship for a certain pump can be represented by the equation H-29-6Q^2 The pump is fixed 2 m shove the water surface tank at a level 10 m above the pump. The suction and delivery pipes are 12 m and 720 m long, respectively and each pipe is 0.5 m in diameter. The Estimate the discharge (in m³/s) at the best operating point for the pumping system,arrow_forwardEstimate pump power requirement for Hpump = 58.598 m and npump = 0.60. Use the following: v = 1 x 10-6 m2/s Kentrance = 0.5 Kexit = 1 Kelbow = 0.26 f = 0.019 γ = 9810 N/m3 Choices: 197 kW 179 kW 279 kW 297 kW None of the Choicesarrow_forward
- 1) Interpret solar power in the context of environmental impact.2. What is the rigid dichotomy between windmill and diesel-driven pumps?3. For a normal windmill-driven pump at 3 m/s wind speed, the yield at a 10 m Head is typically 0.12 liters/s per m2 of rotor area, value windmills in the context of yield.arrow_forwardQ-- Consider the following data relating toperformance of a centrifugal pump:speed 1200 rpm, flow rate 30 L/s, head 20 m, and power 5 kW. If the speed of the pump is increased to 1500 rpm, assuming the efficiency isunaltered, Find the new flow rate and head.arrow_forwardThe manometric head developed by a three-stage centrifugal pump runningat 450 rpm is 60 m. The width and diameter of each impeller at the outlet are60 mm and 750 mm, respectively, with outlet blade angle 45°. Determine itsmanometric efficiency, if discharge through the pump is 0.3 m^3/s.arrow_forward
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