In a hydro-electric scheme/plant five (5) Pelton wheels are to be used under the following design am installation conditions: Output power required 28 MW Gross vertical head 271m Rotational speed of the shaft 375 rev/min Number of jets per Pelton Wheel 2 off (two) Maximum operating overall efficiency 75.1 % Head lost to friction in pipeline not exceed Unknown The ratio of the bucket speed to the jet speed 0,46

In a hydro-electric scheme/plant five (5) Pelton wheels are to be used under the following design am installation conditions: Output power required 28 MW Gross vertical head 271m Rotational speed of the shaft 375 rev/min Number of jets per Pelton Wheel 2 off (two) Maximum operating overall efficiency 75.1 % Head lost to friction in pipeline not exceed Unknown The ratio of the bucket speed to the jet speed 0,46

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

See similar textbooks

Similar questions

2.5-L bench scale bioreactor is used for the production of recombinant P64K protein from Neisseria meningitides. The dimensions for the bioreactor are Dt 12.9 cm, ratio Di/Dt = 1/3 and N = 700 rpm. With the scale up factor of 2.24, determine the impeller tip speed (m/s) for the pilot scale bioreactor based on constant impeller tip speed and constant power consumption per volume. Predict which scale up method might give a higher concentration of P64K, if the demand of dissolved oxygen plays an important role.
QUESTION 01 1.1 In a hydro-electric scheme/plant five (5) Pelton wheels are to be used under the following design and installation conditions: 30 MW Output power required 245 m Gross vertical head 375 rev/min Rotational speed of the shaft 2 off (two) Number of jets per Pelton Wheel 81,5 % Maximum operating overall efficiency Unknown 12 Head lost to friction in pipeline not exceed 0,46 The ratio of the bucket speed to the jet speed 0,85 The relative velocity at exit to the relative velocity at entry 0.98 Coefficient of velocity 165° Given that the biade deflect the water at angle Determine: 1.1.1 The overall flow rate throughout the system. 1.1.2 The actual velocity of each jet. 1.1.3 The diameter of each jet. 1.1.4 The diameter of each wheel. 1.1.5 The hydraulic efficiency of the turbine. 1.1.6 The value of the absolute velocity of the water as it leaves the turbine buckets ( .1.7 The percentage of the input power that remains as kinetic energy of the water at
A single stage centrifugal pump has an impeller of 250 mm diameter which rotates at 1,800 rpm and lifts 60 lit/sec to 25 m with an efficiency of 70%. Obtain the number of stages and diameter of each impeller of a similar multi-stage pump to lift 75 lit/sec to 175 m at 1,500 rpm. (8 stages ; 280 mm dia)
Water at 20"C Bows through the pump impeller shown in the figure below, where the inner and outer diameters of the impeller are 160 mm and 400 mm respectively, and the width of the pump blades is 55 mm Part A Wan- μA Estimate the shaft power required to drive the pump at this operating condition Express your answer to three significant figures and include appropriate units. Value Blade Pump impeller The impeller rotates at 3600 rpm Under a particular operating condition, water enters in a direction normal to the inflow surface, the component of the outflow velocity normal to the outflow surface. V is equal to 17 m/s, and the magnitude of the absolute velocity, V, at the outflow surface is 33 m/s Submit Request Answer Units Outflow surface Inflow surface ? 160 บท 400 mun
A 4x3-13 1750 rpm centrifugal pump equipped w/ an 11-inch diameter impeller requires 14.3bhp when delivering 300GPM at a head of 111ft. Predict the new capacity required when the diameter is reduced to 9 inches. Select the correct response: 235.5 gpm 230.45 gpm 240.45 gpm 245.45 gpm 220.32 gpm 225.45 gpm
Answer The following A twin jet Pelton wheel is required to generate 7500 KW when the available head at a nozzle is 400 m. Assuming generator efficiency of 95% overall wheel efficiency of 80% , coefficient of velocity as 0.98, speed ratio as 0.46, reduction in relative velocity while passing through bucket as 15% and taking that the jet is deflected through 165 by the bucket, the diameter of each jet O 13.69 cm 18.84 cm 20.21 cm 10.54 cm
This course EHide block A centrifugal pump with the following impeller dimensions is used to pump water. The pump is running at 1000 rpm. The ideal head rise through the pump is 190 ft. b2 Poz 72 by The parameters of the impeller are as follows: r2= 9in, b2=3in, B2= 31° Take g= 9.81 m/s23 32.2 ft/s2 pw = 998 kg/m3 = 1.94 Slug/ft. Determine the theoretical flow rate in gpm Choose.. Determine the theoretical Power shaft in (hP) Choose...
A prototype pump is designed to so that the attached dimensionless performance curves apply. (a) If the pump is powered by a fixed speed motor delivering a rotational speed of 400 rpm and the impeller diameter is 2 m find the unknown quantities (Q, H, P,n ). Assume the pump is operating a peak efficiency and is pumping cold water. (b) If the pump is to be connected to standard steel pipe, which pipe should be used. Сн 1.00 Efficiency-n 0.75 CH 3 0.50 0.25 0.04 0.08 0.12 0.16 Ce C, and Efficiency
( Apelton wheel generates 8000 kWunder net head of 130m at speed of 200rpm-Speed ratio 0-46.jet diameter to wheel diameter ratio is 1/9 mechaincal efficiency is 75% Determine @ Discharge required Diameter of the wheel © Diameten and numberoljet required specificof speed of turbine
A Pelton wheel Is supplied with water under a head of 35 m at the rate of 40.5 klo litre/min. The bucket deflects the Jot through an angle of 160° and the mean bucket speed Is 13 m/s. Calculate the power and hydraulla efficiency of the turbine. w2 F Outlet 160° B
A Pelton wheel works under a net head of 600 m and it runs at a speed of 720 rpm. The mean pitch dlameter of runner is 1.2 m. For a discharge rate of 0.2m/s, find the power available at the nozzle and hydraulle efficiency of turbine. Assume : C, = 0.98, side clearance angle of buckets = 20, Friction factor of bucket = 0.9.
As a junior field engineer, you have been asked to assist a contractor in resolving the following problem. A 4.9 kW motor and gear drive rated at 175 rpm has been shipped with the four impeller blades listed below. The baffled rapid mix tank to which one of the impellers will be installed is 3.0 m² in volume (1.56 m diameter and 1.56 m depth). Assume water temperature of 10C, G= 1000s, water density = 1000 kg/m³, and motor power to water power transfer efficiency of 80%. Impeller options: A. Axial flow, 3 blades, diameter = 0.48 m, N₁-1.0 B. Axial flow, 3 blades, diameter = 0.61 m, Np=1.0 C. Radial flow, 6 blades, diameter = 0.48 m, Np=6.3 D. Radial flow, 6 blades, diameter = 0.61 m, Np 6.3 Answer the following: 3. What is the rotational speed (n) in rps? b. What is the power required in kW for impeller option A? What is the power required in kW for impeller option C? C. d. What is the power transferred to the water from the selected motor in kW? e. Which impeller should be used?…