Example: Two centrifugal pumps are connected in parallel in a given pumping system. Plot total head Ahagainst capacity Q pump and system curves for both pumps running on the basis of the following dataoperating data for pump 1Ah, mQs, m³/h40353025169209239265operating data forpump2Ah, m40353025Qs, m³/h0136203267Data for systemAh, m20Qs, m³/h022253035244372470

Answered: Image /qna-images/answer/c7eaef78-862a-4d78-a895-8bd2af7ba7b1.jpg

Answered: Example: Two centrifugal pumps are…

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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A pump, having the characteristics below, is used to pump raw sewage to a treatment plant. Discharge, Q (L s') Total head (m) Overall efficiency (%) 60 70 35 31 53 40 10 20 30 40 50 44.7 43.7 42.5 40.6 38 57 60 45 35 50 60 The static lift is 20 m and the length of the pipeline, L, is 10 km. Allowing for minor losses, Hm, totals: 10 V2 Hm 2g where V is the velocity, select the smallest suitable commercially available pipe size from the ones listed below to achieve a discharge of at least 60 L s considering the frictional head loss defined as: 4f LV² gD Diameter, D (mm) f 250 300 350 400 0.0024 0.00237 0.002320.00225
A scale model of a pump has been tested and the following results obtained. Impeller diameter (D) 110mm Power input (P) 2.5kW Speed (N) 1500 r.p.m. Flow (Q) 14.5 litres/sec Head (H) 17m Efficiency (E) 60% You are to determine the speed and size of a geometrically similar pump which would deliver a flow rate of 25 litres/sec against a 22m resistance head. Determine the power input required by this pump.
20
A turbine model has the following characteristics: Effective power: 13, 6 kW; Rotor Diameter: 0.38 meters, Flow: 0.34 ms, Energy Jump: 26.5 J / Kg and 3 R.P.S. rotation It is desired to construct a geometrically similar 1.20 meter diameter turbine that provides a power on the 656 kW axis, we ask: to calculate and justify its answers: a) the specific rotation; b) the unit quantities (rotation, flow and power); c) the rotation, flow and power of the model (bi-unit quantities).
A wind turbine gives the following data: Blade length= 55.5 m. Wind speed = 11 m/s Air density = 1.227 Kg/m3 Power coefficient = 0.55 Assuming equal efficiencies for gearbox and generator, If the Power output from wind turbine, P is 2.1 MW, then find a) Rotor Power Output, P- in M (* b) Wind Power, Pw in MW (: C) Efficiency of Generator Rotor Power Output, Pr in MW
f jon The pilot of a crippled jet was able to control his plane by throttling the two engines. The plane has a weight of 17000 lb and a radius of gyration of kg = 4.7ft about the mass center G. Originally the plane is flying straight at a speed of 1200 ft/s. Neglect the effects of 5000 lb as shown, determine: drag and the loss of fuel. If the thrust in each engine is altered to T₁ = 800 lb and T₂ Remark: The counterclockwise sense is the positive sense. 1.25 ft T₂ 1.25 ft T₁ 1:21:02 7
For the following pump-pipe system below, how will the discharge and pump head change if a smaller pump in the same family is used to replace the current pump? Increase or decrease? EB EA Head (ft) 350 300 250 225 200 150 100 50 0 0 5 10 O Pump head will decrease; discharge will decrease. O Pump head will increase; discharge will increase. O Pump head will increase; discharge will increase. O Pump head will decrease; discharge will increase. 15 20 Discharge (cfs) System head curve 25 H₂ -Intersection point Pump characteristics 30 35 40
ES Font English (United Kingdom) ▬▬ Q Search > Text Predictions: On ALT Paragraph S Accessibility: Good to go Styles The following parameters characterise a liquid-fuelled rocket engine: stagnation pressure P0=100bar; stagnation temperature TO=3300K; nozzle exit diameter DE=1.0m; throat diameter=0.1 m; gas constant R=692 Jkg-1 K -1; ratio of specific heats cp/cV=y=1.25. Estimate the following: static pressure at the exit plane, exit Mach number. Heading Focus Editing ENG UK
Py Flow FIGURE 6.2 Portion of a fluid distribution system showing variations in velocity, pressure, and elevation. Reference level 2.
A pump has a flow rate of 0.5 m3/min. The pump head is 12 m. (a) Determine the pump head in m^2/s^2. Answer Check: 118 m^2/s^2 (b) Determine the pressure change across the pump. Answer Check: 118,000 Pa (1Pa = 1kg/m s^2) (c) Determine the work required for a 100% efficient pump. Answer Check: 980 W (d) Determine the work required for a 85% efficient pump. Answer Check: 1.15 kW
Please solve with a clear explanation and well followed steps
m³/s. Two pump impellers with different diameters run at two different speeds under kinematically similar conditions using water. Assume that the pump similarity rules are valid. The first pump impeller has a diameter of 0.2 m, a rotational speed of 1200 rpm and volume flow rate of 0.06 m³/s. The second pump impeller has a diameter of 0.4 m and a rotational speed of 2100 rpm. The volume flow rate through the second pump impeller is

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