A 50 cm diameter pipe conveyswater for purposes of powergeneration. The pipe is 1000 mlong and has a head of 100 m atthe inlet. If a nozzle, discharginginto atmosphere is fitted at theoutlet, estimate the diameterof the nozzle for maximumtransmission of power. What isthe magnitude of the maximumpower? [Assume f = 0.019].

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Answered: A 50 cm diameter pipe conveys water for…

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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Water fl owing in a smooth 6-cm-diameter pipe entersa venturi contraction with a throat diameter of 3 cm.Upstream pressure is 120 kPa. If cavitation occurs in thethroat at a fl ow rate of 155 gal/min, what is the estimatedfl uid vapor pressure, assuming ideal frictionless fl ow?( a ) 6 kPa, ( b ) 12 kPa, ( c ) 24 kPa, ( d ) 31 kPa, ( e ) 52 kPa
The pump in Fig. draws gasoline at 20 ° C from areservoir. Pumps are in big trouble if the liquid vaporizes(cavitates) before it enters the pump. ( a ) Neglecting lossesand assuming a fl ow rate of 65 gal/min, fi nd the limitationson ( x , y , z ) for avoiding cavitation. ( b ) If pipe frictionlosses are included, what additional limitations might beimportant?
The 32-in pump in Fig. is used at 1170 r/min in asystem whose head curve is Hs (ft) = 100 + 1.5Q2, with Qin thousands of gallons of water per minute. Find the dischargeand brake horsepower required for (a) one pump,(b) two pumps in parallel, and (c) two pumps in series.Which configuration is best?
A fi reboat pump delivers water to a vertical nozzle with a3:1 diameter ratio, as in Fig. . If friction is neglectedand the fl ow rate is 500 gal/min, how high will the outletwater jet rise?( a ) 2.0 m, ( b ) 9.8 m, ( c ) 32 m, ( d ) 64 m, ( e ) 98 m
Acentrifugal pump has di = 24 cm, d2 = 36 cm, by = 12 cm, bz =7.5 cm, B1 = 22° and B2 = 38° and rotates at 1170 r/min. If the fluid is gasoline at 20°C and the flow enters the blades radially, estimate the theoretical (a) flow rate (b) horsepower, and (c) head. For gasoline, take p=680 kg/m3. R Gy Juald e
A fi reboat draws seawater (SG = 1.025) from a submergedpipe and discharges it through a nozzle, as in Fig. P3.176.The total head loss is 6.5 ft. If the pump efficiency is75 percent, what horsepower motor is required to drive it?
The reservoirs in Fig. contains water at 208C. If thepipe is smooth with L = 4500 m and d = 4 cm, what willthe flow rate in m3/h be for Dz =100 m?
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Acentrifugal pump has di = 24 cm, dz = 36 cm, b1 = 12 cm, bz =7.5 cm, B1 = 22°, and B2 = 38° and rotates at 1170 r/min. If the fluid is gasoline at 20°C and the flow enters the blades radially, estimate the theoretical (a) flow rate (b) horsepower, and (c) head. For gasoline, take p=680 kg/m3.
Steam enters a horizontal turbine at 350 lbf/in 2 absolute,580 ° C, and 12 ft/s and is discharged at 110 ft/s and 25 ° Csaturated conditions. The mass fl ow is 2.5 lbm/s, and theheat losses are 7 Btu/lb of steam. If head losses are negligible,how much horsepower does the turbine develop?
In 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?
Two water tanks, each with base area of 1 ft2, are connectedby a 0.5-in-diameter long-radius nozzle as in Fig. .If h = 1 ft as shown for t = 0, estimate the time for h(t) todrop to 0.25 ft.

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