Q2) The velocity of steam, leaving the nozzles of an impulse turbine, is 1228 m/s and thenozzle angle is 20°. The blade velocity is 368.4 m/s and the blade velocity-coefficient is0.75. Assuming no loss due to shock at inlet. Calculate for a mass flow of 0.4536 Kg/s andsymmetrical blading: 1)The blade inlet angle. 2)The driving force on the wheel. 3)The axialthrust on the wheel, and 4)The power developed by the turbine.

Impulse Turbine CalculationsWe can solve for the requested parameters of the impulse turbine using…

Answered: Q2) The velocity of steam, leaving the…

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...

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A 60 Hz generator is connected to a turbine operating under a head of 3000 ft with a flow of 80 cubic ft / sec. The turbine specific speed is 3 rpm and a turbine efficiency of 80%. a.) Determine the number of poles of the generator
The terminal voltage of a 150 kW series generator is 600 V at rated load. The armature resistance is 0.06 ohms and the series field resistance is 0.04 ohms. Find generated emf.
d) The generated voltage of a turbine at timet seconds is given by: v(t) = Vssin(0.4nt +=) 61 Where Vs is generator voltage in Volts. Evaluate the following: The voltage of the generator after 2.5 seconds if Vs = 70 V. The voltage at time t = 0 seconds to 3 significant figures The time when the generator first reaches maximum voltage, the period, the frequency, and the time displacement. ii. iv. V. Your answer to this part of the task should be supported by suitably annotated graphical evidence to help understanding by a non-technical audience. e) If the cable of this generator has a shape of the form: y = 70cosh(x/55)sinh²( Provide fully explained solutions to the following: The value of y when x = 10 to 3 significant figures The value of x when y = 40 to 3 significant figures Provide fully explained graphical evidence to show justify your answers to part (ii) vi. vii. viii.
A 40kW induction motor with a lagging power factor of 0.76 is supplied by a 120Vrms 60Hz sinusoidal voltage source. find the capacitance needed in parallel with the motor to raise the power factor to (a) 0.9 lagging and (b) 1.0
H. W.: A 35 kW induction motor has power factor 0.9 and effliciency 0.9 at full-load, power factor 0.6 and efficiency 0.7 at half full-load. At no load the current is 25% of full-load current and power factor is 0.I. Capacitors are supplied to make the line power factor 0.8 at half full- load. With these capacitors in circuit, find the line power factor at: (i) full load, and (ii) no load.
Real Power Versus Voltage curve may be used to assess the a.Steady state voltage stability b.Loading of that particular AC Generator c.Dynamic voltage stability d.Complete Voltage stability 2- kinetic energy stored in the rotor of a synchronous alternator is given by a.G * H * w b.m * a c.0.5*m*v*v d.S * H
c dep15m Problem 2 A ferromagnetic core with a relative permeability of 2000 is shown in Figure. The dimensions are as shown in the - 30 cm 30 cm 7 cm diagram, and the depth of the core is 7 cm. The air gaps on the left and right sides of the core are 0.050 and 0.070 cm, respectively. If there are 300 turns in the coil wrapped around the center leg of the core and if the current in the coil is 1.0 A, what is the flux in each of the left, center, and right legs of the core? What is the flux density in each air gap? 30 cm 0.05 cm 300 turns 0.07 cm 7 cm
two synchronous generators are connected in parallel, feeding a load together. the frequency of the first generator in the no-load State is 52 Hz and the slope of the characteristic is 1 MW/Hz. the total power of the load fed by these two generators is 2.5 MW and the power coefficient is 0.6 inductive. by drawing the characteristic curve of the system;a) what is the frequency of the system when the load in question is fed, and how do the two generators share the load between themselvesb) if a load of 0.5 MW is added to the system, find the operating frequency of the new system and the powers given by each generatorc) if a second load of 0.5 MW is connected to the system, the idle operating frequency of the second generator is increased by 0.5 Hz, what happens to the operating frequency of the system and the power values given by the generators
The synchronous reactance of a cylindrical rotor machine is unity. The machine is connected to an infinite bus bar through an equivalent reactance of half of its synchronous reactance. For a maximum power output of 1.3 p.u. delivered at 1.02 p.u. voltage, find E. While the field is undisturbed, find the value of the current if the real power output is reduced to 0.65.p.u.
If two 3-phase induction machines are mechanically coupled with each other. The two machines are supplied by 50 Hz and 60 Hz, respectively. the speed of the combination of both machines will be:
6. Home Works: a) The figure below shows the per-phase equivalent circuit of a two- pole three-phase induction motor operating at 50 Hz. The voltage (E1) across the magnetizing inductance is 210 V, and the slip (s) is 0.05. What is the developed torque produced by the motor ? 0.04 0 jo.22 Q j0.22 0 j6.28 NE E1 0.05 0
5-25 Electric power is to be generated by installing a hydraulic turbine-generator at a site 110 m below the free sur- face of a large water reservoir that can supply water steadily at a rate of 900 kg/s. If the mechanical power output of the turbine is 800 kW and the electric power generation is 750 kW, determine the turbine efficiency and the combined turbine- generator efficiency of this plant. Neglect losses in the pipes.

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