Problem 1. A centrifugal water pump is designed to operate at a speed of N = 1200 rpm at a volume flow rateof Q = 35 L/s. The impeller has the following dimensions:ParameterRadius, r (cm)Blade width, b (cm)Blade angle, B (deg)Inlet101.030Outlet17.50.7540(a) Draw the inlet and outlet velocity diagrams to scale. (b) Determine the inlet and outlet absolute flow angles(measured relative to the normal direction). (c) Calculate the head developed by the pump for swirl free entry andfor the specified geometry. (d) For a pump efficiency of n = 75%, calculate the mechanical power delivered tothe pump.

Answered: Image /qna-images/answer/5d2658bc-c599-4356-9735-27bc1a6e063d.jpg

Answered: Problem 1. A centrifugal water pump is…

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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1(C) A centrifugal pump has an impeller of diameter (D) of 300mm. When pumping 20°C water at a fixed rotational speed of 1500 RPM, the measured flow rate Q and pressure rise Pare given by the manufacturer as follows: Flow Rate (L/s) 13 19 25 32 38 44 Pressure Rise (Bar) 2.5 2.4 2.35 2.2 2.0 1.6 It is desired to use the same pump, running at 945 RPM, to pump 20°C water at 22L/s. According to your dimensionless correlation, what pressure rise p is expected?
Example (6-1): At the best efficiency point a centrifugal pump, with impeller diameter D=8 in, produces H= 21.9 ft at Q=300 gpm with N=1170 rpm. Compute the corresponding specific speed using a) U.S. customary units. B) SI units (rad/sec, m/sec, m'/sec").c) European units (rev/sec, m/sec, m/sec?). Develop conversion factors to relate the specific speeds.
Figure below shows the performance curve family of Model 5009 Centrifugal pumps of Taco Pump Inc., running at a fixed speed of N = 1160 rpm. For the pump with the impeller diameter D = 8.625 in., you are asked to determine the best efficiency point (BEP) of the given pump. What is the pump efficiency at BEP? HEAD IN FEET 50 0 0 0 0 40 20 10 O 81% 8.625" 30 (219mm). O 51% O 71% ○ 61% O Taco L/SEC 5 9.25" (235mm) 8.00" (203mm) 7.375" (187mm) 6.75" (171mm) 0 10 15 125 Model 5009 FI & CI Series 20 25 CURVES BASED ON CLEAR WATER WITH SPECIFIC GRAVITY OF 1.0 8 8 52 75% 77% 30 79% 1160 RPM FEBRUARY 19. 2002 35 40 45 REQUIRED NPSH olº 1.5HP (1.1KW) dot 17% Curve no. 2140 Min. Imp. Dia. 6.75" Size 6 x 5 x 9.0 50 55 60 75% 72% 250 375 500 625 FLOW IN GALLONS PER MINUTE 8% 2HP(1.5KW) 750 %09. 55% (2.2KW) 3HP 7.5HP(5.6KW) 2015 do 35% 875 FEET 15 12 -9 6 SHP(3.7KW) 3 0 10 8 NPSH 1000 HEAD IN METERS 5 KPo 45 -36 27 18 9 -0 100 -80 60 -40 2 -20 8 HEAD IN KILOPASCALS
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.
For a 6.25-inch Model 4075 pump operated at 1160 rpm, if 450 GPM of water is to be delivered, what will be the estimated pump head in ft? HEAD IN FEET 30 25 0 0 0 10 O 6 ft 7.25" (184mm) 20 7.00" (178mm). 6.75" (171mm). 6.50" (165mm)] 15 6.25" (159mm). 5 O 16 ft O 20 ft O 12 ft aco® L/SEC 5 OT 10 Model 4075 FI & CI Series 15 -6-6 ⁰ dº 20 ANA 888 778 25 REQUIRED NPSH do 1160 RPM November 1, 2010 K ・dº- [M 90 do 30 8800 81 1HP(.75KW) DeJ kin do 60% 35 do 50 Curve no. 2175 Min. Imp. Dia. 6.25" Size 5 x 4 x 7.0 40 45 3HP(2.2KW), 2HP(1 5KW) 5HP(1 1KW)> CURVES BASED ON CLEAR WATER WITH SPECIFIC GRAVITY OF 1.0 L 75 150 225 300 375 450 525 600 675 FLOW IN GALLONS PER MINUTE NOWONG FEET 15 12 7 6 2 1 NPSH 758 50 5 HEAD IN METERS 45 586888 KPO 60 40 20 10 LO HEAD IN KILOPASCALS
A water truck drives slowly around a construction site, spraying water to keep dust down. A pump maintains a constant pressure of 100 kPa, gage, and the water is dispersed through 20 spray nozzles, each of diameter 1 cm. If the truck is initially filled with 4000 L of water, and the flow rate is constant, determine how long the truck can drive before a refill is needed. [57.0 s]
7. Pump 50mm Þ 17m Data: f = 0.0067 Pressure at 3 = 194 kN/m² gauge Velocity at 3 = 2.7 m/s p = 830 kg/m³ Pump efficiency = 88% Motor efficiency = 84% Pressure at 1 is atmospheric Velocity at 1 is negligible Determine required input power to motor [1.64 kW] 8. 200mm turbine water gen Data: At 1, p = 230 kN/m² gauge, v = At 2, p = 0 = 0 gauge, v = 0 Turbine efficiency = 80% Generator efficiency = 90% 3.6 m/s %3D Determine output power from generator [19.3 kW]
Solve the question attached in the image below Note: question is taken from power plant course
V:32) The jet on a water feature shoots a column of water 75 ft. high. The nozzle is located just above the surface of a reflecting pool and has a diameter of 2 in. A submersible pump with a 4 in dia outlet and an 8 in. diameter intake pipe located 3.25 ft. below the surface of the pool operates the jet.1. Write an expression to determine the velocity of the water coming out of the nozzle.2. Find the velocity of the water at the nozzle exit.3. Find the velocity at point A just inside the inlet.
Problem 1 Matching Pump Tests by the Byron Jackson Co. of a 14.62-in-diameter centrifugal water pump at 2,134 rev/min yield the following data: Q. ft³/s 0 2 4 6 8 10 H, ft 340 340 340 330 300 220 BHP 135 160 205 255 330 330
3). in the figure below. Consider the acceleration due to gravity as g=32.2 ft/s², specific weight of water as yw-Pwg=62.4 lb/ft³ and gasoline as ygasoline=Pgasolineg=42.5 lb/ft³. What pressure, pi, is needed to produce a flowrate of 0.09 ft³/s from the tank shown Air Gasoline 2.0 ft Salt water 3.6 ft SG = 1.1 0.06-ft diameter -
B) The air flow to a four cylinder four-stroke engine is 2.15 m³/min. During a test on the engine the following data were recorded: Bore 10.5cm; stroke 12.5cm; engine speed 1200 rpm, torque 150 N.m, fuel consumption 5.5 kg/hr, calorific value of fuel, 43124 kJ/kg, ambient temperature 1-The brake thermal efficiency. and pressure are 20°C and 1.03 barş. Calculate: 2-The brakes mean effective pressure. 3-The volumetric efficiency.

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