ENPY = (+3.2 cm. Centrifugal pump rotates at 1500 rpm. Water enters the wings normally and exits by 38 degrees from the radial direction. Thevolumetric flow rate is given as 0.25 m^3/s. By accepting the yield as 100%;A centrifugal pump impeller has an inlet radius of 15 cm and a blade width of 6.3 cm. Its radius at the exit is 35 cm and its wingspan is(a2 = 38°)(Psu = 998 kg/m³)P1+ as 29pgP2+ d2 29pgL V²hg sûrekli= f-52g+ zz + hpompa.f+ hearbing + hg,toplam Re =p.V. D+ z21.11= -1.8 logRe6.9ɛ / Dhkyerel =KK 29Wmil =3.7hg,toplam= hx,sarekli + hx.yerelПротраH =pgz/1ẠMNsp =(gH)³/4ротра girisWmil,BWmilAWR%3DPR (wePAb) Find the required shaft power for the centrifugala) Find the manometric head provided bythe centrifugal pump.pump.28092 W17,05 mO 42087 W21,28 mO 38085 W13,67 mO 45765 W12,23 mO 35063 W15,56 m

Centrifugal Pump In Centrifugal pump kinetic energy of rotating impeller is imparted on the liquid…

A centrifugal pump impeller nas an iniet radius oT 15 cm and a blade width of 6.3 cm. Its radius at the exit IS 35 cm and Its wingspan is 3.2 cm. Centrifugal pump rotates at 1500 rpm. Water enters the wings normally and exits by 38 degrees from the radial direction. The volumetric flow rate is given as 0.25 m^3/s. By accepting the yield as 100%; (a2 = 38°) (Psu = 998 kg/m³) P2 L V² P1+ a,+z + hpompa.f = 2g p.V.D + zz + heûrbing +hg,toplam _Re = hg sûrekli= f D´2g Pg pg 6.9 D =-1.8 log Re hx.yerel =K pg¥H 3.7 hỵ,toplam= hx,sūrekli + hg,yerel Wmil = Протра ENPY = ( +) H = Nsp = (gH)³/4 %3D v= 2nr,b,V1,n = 2nrzb2V2,n pompa girişi Pg WmilB _ PB WmilA VA b) Find the required shaft power for the centrifugal a) Find the manometric head provided by the centrifugal pump. pump. 28092 W 17,05 m 42087 W 21,28 m 38085 W 13.67 m 45765 W 12,23 m 35063 W 15,56 m

A centrifugal pump impeller nas an iniet radius oT 15 cm and a blade width of 6.3 cm. Its radius at the exit IS 35 cm and Its wingspan is 3.2 cm. Centrifugal pump rotates at 1500 rpm. Water enters the wings normally and exits by 38 degrees from the radial direction. The volumetric flow rate is given as 0.25 m^3/s. By accepting the yield as 100%; (a2 = 38°) (Psu = 998 kg/m³) P2 L V² P1+ a,+z + hpompa.f = 2g p.V.D + zz + heûrbing +hg,toplam _Re = hg sûrekli= f D´2g Pg pg 6.9 D =-1.8 log Re hx.yerel =K pg¥H 3.7 hỵ,toplam= hx,sūrekli + hg,yerel Wmil = Протра ENPY = ( +) H = Nsp = (gH)³/4 %3D v= 2nr,b,V1,n = 2nrzb2V2,n pompa girişi Pg WmilB _ PB WmilA VA b) Find the required shaft power for the centrifugal a) Find the manometric head provided by the centrifugal pump. pump. 28092 W 17,05 m 42087 W 21,28 m 38085 W 13.67 m 45765 W 12,23 m 35063 W 15,56 m

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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(B) Two similar centrifugal pumps are connected in series. The theoretical head- discharge relation of Pump#1 is given by: h, = 5.3 – 0.58Q and that of Pump#2 is given by: h, = 7.7 + 0.22Q. At a specific operation conditions, the head of these combined pumps is 12 m. Estimate the followings: (i) The head of each pump (ii) If the flow out of this system is completely blocked while the two pumps still running, what is the resulting total head of the system? (iii) If the two pumps rotates with same speed, how many pump#2 is bigger than pump#1?
The centrifugal pump in Fig. has r1 = 15 cm,r2 = 25 cm, b1 =b2 = 6 cm, and rotates counterclockwiseat 600 r/min. A sample blade is shown. Assume α1 = 90°.Estimate the theoretical flow rate and head produced, forwater at 20°C, and comment.
While rotating at 900 rpm, a centrifugal pump delivers 2500 gpm of water at ahead of 75 ft. If the impeller diameter is 1.5 ft. and the blade width is 1.75 in.,find the (a) blade angle β2, (b) radial velocity Vr2, and (c) blade speed u2. Assumeno whirl at the inlet.Ans: β2=12.5°; Vr2=8.1 ft./s; u2=70.7 ft./s
Problem 2 - Pumps in Parallel Two 32-in pumps, with performance curve shown below, are combined in parallel to deliver water at 60°F through 1500 ft of horizontal pipe. If f = 0.025, what pipe diameter will ensure a flow rate of 35,000 gal/min for n = 1170 rev/min? 1170 r/min 800 50 NPSH 700 600 500 400 300 200 Total head, ft 0 36-in dia. 32-in dia. 28-in dia. 4 8 82% 85% 1500 bhp 87% 88% 3000 bhp, 3500 bhp 87% 2500 bhp 2000 bhp 12 16 20 24 U.S. gallons per minute x 1000 28 8 8 8 8 NPSH, ft 40 30 20
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An inflow to a turbine with a discharge of 20 m³/s leads to a ration speed of 150 rpm. The blades inlet edges have an angle of 120° to the direction of whirl. The outer diameter of the runner is 1.5 m and the runner inlet width is 1.0 m. 5. (a) To plot the velocity triangle at the blade outlet edge. (b) Assume design operating conditions and no velocity of whirl at outlet, calculate the power delivered by the runner. (c) The elevation difference between the head race and the tail race is 23 m and the head available to the turbine is 20 m, what is the hydraulic efficiency of the turbine and overall efficiency? (d) If a model of 1/10 full scale is constructed to operate under a head of 10 m, what must be its speed, power, water consumption and overall efficiency to run under the similar conditions to the prototype?
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A centrifugal pump having a head-capacityrelationship given by the equation ha=180 –6.10 X 10-4 Q2, with ha in feet when Q is ingpm, is to be used with the system shownin the figure, For Z2-Z1= 50 ft, what is theexpected flowrate if the total length ofconstant diameter pipe is 600 ft and thefluid is water? Assume the pipe diameter tobe 4 inch and the friction factor to be equalto 0.02. Neglect all minor losses.
IM 2m A turbomachine has inner impeller diameter of 1000 g and outer diameter 2000 mm, with a uniform width of flow cross-section being 120 mm. Water enters radially at the inner impeller and exit at the outer impeller which has a blade angle of 62°. The flow rate through the machine is 4 m³/s while the rotation speed is 350 rpm. Take water density as 1000 kg/m³ and assume ideal flow conditions with no losses, and the absolute velocity of the inlet water is directed radially! (a) (b) (c) (d) (e) (f) Draw the velocity diagrammes at the inlet and outlet of an impeller, labelling the velocity components. What is the blade speed at the inlet? What is the absolute speed of the water at the inlet? What is the blade angle at the inlet? Find the absolute velocity of water at the outlet. Justify whether the machine is a pump or turbine by calculating the torques, acting on the blade.
Q.2 A centrifugal pump is required to pump water to an open water tank situated 4 km away from the location of the pump through a pipe f diameter 0.2 m having Darcy's frřiction factor of 0.01. The average speed of waterinthe pipe is 2 m/s. If it is to maintain a constant heac of 5 m in the tank, neglecting other minor losses, the absolute discharge pressure at the pump exit is (a) 0.449 bar (c) 44.911 bar dund (b) 5.503 bar (d) 55.203 bar
A centrifugal pump is used to pump a liquid with the properties given below. Liquid is pumped from a storage tank at 95 kPa (a) to a discharge tank at 300 kPa (a). The system configuration is given in the table below. Table 1: system configuration Suction Discharge 4 50 Length (m) Diameter (m) 0.07 0.055 12 90° bends (L/D-35) 5 T piece (L/D=7) Gate valve (L/D-35) 1 1 1 2 Static height (m) 25 Liquid density = 1100 kg.m³ Viscosity = 1.5 x 10-³ Pa.s Vapour pressure of the liquid = 25 kPa (a) Material of construction of pipe is commercial steel, ε = 000045 m Table 2: Pump data 0 10 20 30 40 Flowrate (m³.hr¹) Head (m) 55 56 51 36 6 NPSH (m) 0 2 6 11 19 22 3.1. Graphically determine the optimal operating point of the pump in the above system using the pump data in Table 2. 3.2. Determine the NPSH of the system and determine whether the pump will cavitate when used in the above system.