urbine works under a head ol 19 m and has a maximum flow rale of 3 m/s and a speed of rpm. If it has to work in another plant under a head of 5 m, the maximum flow rate will be m/s.
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- A Kaplan turbine of 100 B.H.P. is working under a headof 5 in and running at 210 R.P.M.The discharge through the tur.bine is 1*80 m°/sec.If now the turbine is allowed to work under a head of 15 m,what would be its new speed, discharge and power ?A Pelton wheel working under a head of (500 m) produces (13 MW) at (430 r.p.m). If the overall efficiency is (85%). Find the discharge, Assume velocity coefficient is (0.98) and speed ratio is (0.46).A pump has a specific speed of 45 and 600rpm when it delivers 0.01m3/s. Find the head developed by the pump in ft. Ans. 926.07
- 1. An axial flow water pump is based upon the free-vortex design. The mean diameter velocity diagram has an axial inlet with a flow coefficient of 0.3 and a work coefficient of 0.208. The tip diameter to mean diameter and the hub diameter to mean diameter ratios are 1.25 and 0.75 respectively. The blade velocity at the mean diameter is 60 m/s. Find and draw the velocity diagrams at the mean, hub and tip diameters. Show all velocities and angles on the velocity diagrams. {..A supply water is available at a head of 684 meters. It is proposed to build a turbine to operate at 6 rev/s and develops 14.92 MW.Compute the specific speed in rpm.a. 3297rpmb. 4356rpmc. 6568rpmd. 3477rpmWater is to be pumped using a reciprocating pump with an actual flow rate of 0.54 m°/sec and a %slip of 1.55%. Utilizing single acting two pistons with each piston has a bore 1.25 times the stroke, If the pump is running at 1 241 rpm, what is the bore in mm?
- problem 80 cplease make the solution is easy to understandTurbine are to be designed to develop (30 kW), when operating under a head of (70m) and speed (60 rpm). Specify specific speed to choose the suited type of turbine.1. A LEV system has a centrifugal fan rotating at 714 rpm. The airflow is 6210 cfm, the fan total pressure is 4.07” w.g., and the brake horsepower is 3.12 hp. If the rotating speed is decreased to 620 rpm, what are the brake horsepower? a. 1.43 hp b. 2.04 hp c. 2.41 hp d. 2.67 hp 2.A LEV system has a centrifugal fan rotating at 714 rpm. The airflow is 6210 cfm, the fan total pressure is 4.07” w.g., and the brake horsepower is 3.12 hp. If the rotating speed is decreased to 620 rpm, what are the new value for fan total pressure? 4.15" w.g. 3.87" w.g. 3.07" w.g. 3.94" w.g.
- A. A water jet of diameter 180 mm impinges on the buckets of a Pelton turbine having overall efficiency of 85% while operating under a net head of 500 m and at speed of 420 rpm. Find the specific speed of the turbine. Take coefficient of velocity of the jet as 0.98 and speed ratio as 0.46. B. The pitch circle diameter of a Pelton wheel is 0.9 m. A jet of water of diameter 80 mm gets deflected by an angle of 170° when it impinges on the buckets. The bucket friction coefficient and coefficient of velocity of jet can be taken as 0.93 and 0.97 respectively. If the net head available on the wheel is 500 m and speed ratio is 0.45, calculate (a) the power transferred to to the wheel by the jet, (b) hydraulic efficiency, and (c) specific speed of the turbine. Take mechanical efficiency of wheel as 0.9.EXERCISE PROBLEMS IN MODULE 3 PROBLEM: A nozzle having a velocity coefficient of 0.98 discharges a jet 15 cm in diameter under a head of 270 m. The average nozzle angle is a, = 3°. The wheel diameter is 2.45 m, B2 = 20° .k = 0.5. The mechanical efficiency is 97%. The peripheral velocity of the wheel is desianed for maximum efficiency. m/sec h) Find for the Nozzle-Bucket efficiency, in per cent. i) Solve for the Turbine Gross efficiency. j) Draw a velocity diagram. And label. RSE MODULEIn centrifugal pump if we know the value of actual discharge is 250 l/sec , then find the value of head. Select one: O a. 1.988 m O b. 0.1988 cm O c. 19.88 m O d. 19.88 cm