3. Describe, with the aid of sketches, the relationship between geometry and specific speedfor pumps.a. A model centrifugal pump with an impeller diameter of 20 cm is designed torotate at 1450 rpm and to deliver 20 dm3/s of fresh water against a pressure of150 kPa. Determine the specific speed and diameter of the pump. How muchpower is needed to drive the pump if its efficiency is 82%?b. A prototype pump with an impeller diameter of 0.8 m is to be tested at 725 rpmunder dynamically similar conditions as the model. Determine the head of waterthe pump must overcome, the volume flow rate, and the power needed to drivethe pump

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Answered: 3. Describe, with the aid of sketches,…

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

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A Francis radial-flow hydroturbine has the following dimensions, where location 2 is the inlet and location 1 is the outlet: r2 = 2.00 m, r1 = 1.30 m, b2 = 0.85 m, and b1 = 2.10 m. The runner blade angles are ?2 = 71.4° and ?1 = 15.3° at the turbine inlet and outlet, respectively. The runner rotates at n. = 160 rpm. The volume flow rate at design conditions is 80.0 m3/s. Irreversible losses are neglected in this preliminary analysis. Calculate the angle ?2 through which the wicket gates should turn the flow, where ?2 is measured from the radial direction at the runner inlet. Calculate the swirl angle ?1, where ?1 is measured from the radial direction at the runner outlet. Does this turbine have forward or reverse swirl? Predict the power output (MW) and required net head (m).
For Questions 3 to 5 A certain centrifugal pump was tested and its performance curves can be approximated as follows: H = 340 - 1.2(Q^2), in feet BP = (0.0521Q^3) + (1.250^2)+(11.042Q) + 134.5, in horsepower where Q is in ft^3/s. Question 3 If a single pump is used to deliver water of a system which requires a total of 8 ft^3/s, what is the efficiency of the pump (in %)? Take the specific weight of water to be 62.4 lbf/ft^3. Round your answer to 2 decimal places.
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
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?
Hydrodynamics pumps 5. A centrifugal pump has r1 = 6 in., r2 = 12 in., b1 = 3 in., b2 = 2 in., β1 = 20°, β2 = 10° and rotates at 1200 rev/min. If the fluid is water at 60°F, estimate the theoretical (a) flow rate, in gpm; (b) the head in ft; and ( c) the water horsepower, HP. Assume near-radial entry flow. a. flow rate Answer : ____________________ gpmb. head Answer : ____________________ ftc. water horsepower Answer : ____________________ HP
i need ans very very fast in 20 min and thank you | ᴅʏʙᴀʟᴀ ?✨؛
A pump has overall efficiency of 70 %. It delivers 90 Ipm at 1000 rpm and 700 N/cm". If the prime mover input torque is 12 KN-cm, calculate a) the actual torque of the pump b) volumetric displacement in cm". Comment on the significance of torque in pumps. A BI
Hydro electric station is installed to utilise 30 ma/sec of water of a river at a head of 7.5 m. If 85% turbine efficiency can be counted on, (i) is it feasible to develop this power by two turbines with rpm not less than 50, the turbine having specific speed not greater than 540 rpm ? (ii) what type of runner will be used ? (iii) what is the diameter of runner if the speed ratio is 0.85? [(i) N = 156'5 rpm, .. yes (ii) Kaplan (iii) P25 m]
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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