Determine the number of turbines required

Assignment Help Mechanical Engineering

Reference no: EM131057197

A hydroelectric power station is required to generate a total of 4.2 MW from a number of single-jet Pelton wheel turbines each operating at the same rotational speed of 650 rpm, at the same power output and at a power specific speed of 1.0 rev. The nozzle efficiency ηN of each turbine can be assumed to be 0.98, the overall efficiency ηo is assumed to be 0.88, and the blades speed to jet speed ratio v is to be 0.47. If the effective head HE at the entry to the nozzles is 250 m, determine

a. the number of turbines required (round up the value obtained);

b. the wheel diameter;

c. the total flow rate.

Reference no: EM131057197

Questions Cloud

Income statement net of applicable income taxes : All of the following components are shown in the income statement net of applicable income taxes EXCEPT (a) gain or loss on sale of plant assets. (b) extraordinary gain or loss. (c) cumulative effect of a change in accounting principle. (d) discontin..

What is the value of the equilibrium constant : Consider the following reaction: NH4HS(s)?NH3(g)+H2S(g) An equilibrium mixture of this reaction at a certain temperature was found to have [NH3]= 0.274 Mand [H2S]= 0.370 M. What is the value of the equilibrium constant (Kc) at this temperature?

Gain or loss on sale of plant assets : All of the following components are shown in the income statement net of applicable income taxes EXCEPT (a) gain or loss on sale of plant assets. (b) extraordinary gain or loss. (c)cumulative effect of a change in accounting principle. (d) discontinu..

What is annual operating cash flow from proposed project : The Wolf's Den Outdoor Gear is considering replacing the equipment it uses to produce tents. The equipment would cost $1.4 million and lower manufacturing costs by an estimated $215,000 a year. The equipment will be depreciated over 8 years using str..

Determine the number of turbines required : A hydroelectric power station is required to generate a total of 4.2 MW from a number of single-jet Pelton wheel turbines each operating at the same rotational speed of 650 rpm, at the same power output and at a power specific speed of 1.0 rev

Determine the reactants or products : The reaction below has an equilibrium constant Kp=2.2×106 at 298 K. 2COF2(g)?CO2(g)+CF4(g) Express your answer using two significant figures. A. Calculate Kp for the reaction below. 4COF2(g)?2CO2(g) +2CF4(g) Predict whether reactants or products w..

Bonds of equivalent risk yield-find market value of bonds : AB bonds carry a 10% annual coupon, have a $1,000 face value and mature in 4 years. Bonds of equivalent risk yield 15%. Find the market value of AB bonds. AB is in financial difficulty and has asked its bondholders to accept the following deal. The f..

Prepare a paper about must pertain to operating systems : Prepare a Research paper about Must pertain to operating systems.

Determine the reynolds numbers for both the hot and cold : Assuming dynamically similar conditions between those of the laboratory and the projected design determine, for the "cold" test, the equivalent mass flow rate and the speed of rotation. Assume the gas properties are the same as for air

User Account

All Pages