12.18 WEY The performance characteristics of a certain centrifu- gal pump having a 9-in.-diameter impeller and operating at 1750 rpm are determined using an experimental setup similar to that shown in Fig. 12.10. The following data were obtained during a series of tests in which z₂z₁ = 0, V₂ = V₁, and the fluid was water. - 21 Q (gpm) 20 40 60 80 100 120 140 P2 - P₁ (psi) 40.2 40.1 38.1 36.2 33.5 30.1 25.8 Power input (hp) 1.58 2.27 2.67 2.95 3.19 3.49 4.00 Based on these data, show or plot how the actual head rise, ha, and the pump efficiency, n, vary with the flowrate. What is the design flowrate for this pump?

12.18 WEY The performance characteristics of a certain centrifu- gal pump having a 9-in.-diameter impeller and operating at 1750 rpm are determined using an experimental setup similar to that shown in Fig. 12.10. The following data were obtained during a series of tests in which z₂z₁ = 0, V₂ = V₁, and the fluid was water. - 21 Q (gpm) 20 40 60 80 100 120 140 P2 - P₁ (psi) 40.2 40.1 38.1 36.2 33.5 30.1 25.8 Power input (hp) 1.58 2.27 2.67 2.95 3.19 3.49 4.00 Based on these data, show or plot how the actual head rise, ha, and the pump efficiency, n, vary with the flowrate. What is the design flowrate for this pump?

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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Q-) When a centrifugal pump tried at a constant rotation speed of n = 1470 rpm, the following values were found: Q: dm3/s 0 10 20 30 40 50 55 60 70 H: m 460 495 507 500 490 460 449 430 390 Hy= 120 + 0.136Q2(Q→dm3s⁄;H→m) A-) Indicate the operating point of the pump. B-)What would be the operating point if two of this pump are connected in parallel to the same discharge pipe?
The system curve for a water supply system is shown in the figure below (i.e., red curve). If a 7-inch pump is operating at 1160 rpm, what will be the discharge of water through the system in GPM? Curve no. 2175 Min. Imp. Dia. 6.25" Size 5 x 4 x 7.0 40 HEAD IN FEET 30 25 W 20 10 5 L/SEC 5 7.00" (178mm) 6.75" (171mm) 6.50" (165mm) 15 6.25" (159mm) 7.25" (184mm) O 150 GPM Laco O 350 GPM O 450 GPM O 250 GPM 10 Model 4075 FI & CI Series 15 70% 20 "Dede de 088 A. 25 REQUIRED NPSH 90 1160 RPM November 1, 2010 TM 90- N 00 30 8800 877 1HP(.75KW) de (5 60% ox 35 -10% 5% Tolo 10. 3HP(2.2KW) 2HP(1 5KW). 15HP(1 1KW). CURVES BASED ON CLEAR WATER WITH SPECIFIC GRAVITY OF 1.0 ▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬ 75 150 225 300 375 450 525 600 675 FLOW IN GALLONS PER MINUTE 45 LOWONG FEET 15 12 9 6 0 6 5 + 2 1 750 NPSH HEAD IN METERS 45 36 OG KPO 27 18 -9 -70 -60 -50 -40 20 10 -0 HEAD IN KILOPASCALS
Hello i have an example with an answer , please show the solution since only the answer was shown in this example. And i need its solution to review properly. Thank you 1.Question : 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 placesAnswer: 2.554
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Complete the following tasks: QUESTION 1: A centrifugal pump consists out of an impeller, diffuser and casing and is powered by 300 kW (shaft power) and rotates at 96.3 rad/s. The flow rate generated by the machine is 54.7 Kilo-litres/min. The impeller blade inlet angle and width is 23° and 180 mm respectively. The blades occupy 12% of the impeller area and the water is assumed to enter the impeller radially. Suction and delivery pipes are equal in size. Determine: 1.1. The impeller inlet (i) diameter and inlet blade velocity. (Hint - Substitution: Vn in terms of Di and U, in terms of D; both sub into Tan of Blade inlet angle, only unknown is then solving for D?) ANS: 300 mm; 14.42 m/s If the pump has a mechanical efficiency of 80%, calculate the blade velocity at outlet (Uo) and outlet whirl velocity Vwo. Assume the blade exit angle equal to the guide vane angle. (Hint - Substitution: Write Vwo in terms of U. sub in Euler equation only unknown then is solve for Vwo) ANS: Vwo = 11.54…
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