Q4. The following particulars refer to a stage of an impulse-reaction turbine.Outlet angle of fixed blades = 20°Outlet angle of moving blades = 30°Radial height of fixed blades =100mmRadial height of moving blades =100mmMean blade velocity = 138m/sRatio of blade speed to steam speed = 0.6253Specific volume of steam at fixed blade outlet -1.235 m²/kg3Specific volume of steam at moving blade outlet =1.305 m³/kgCalculation the degree of reaction, the adiabatic heat drop in pair of blade rings, and thegross stage efficiency, given the following coefficients which may be assumed to be thesame in both fixed and moving blades: m = 0.9,0=0.86.

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Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

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Q3.A Francis turbine has the dimensions of r=1.42 m, r,=2.00 m br=2.20 m and by=0.731m. Rotation speed of the turbine is 180 rpm. Three angles of velocities at the inlet and outled of the blade are defined as oaz= 35° and al=25° The flow rate of turbine is 340 m/s and the total head of the turbine is 80 m. Neglecting losses, www a) Draw the velocity three anges at inlet and outlet of the blade. b) Calculate blade angles at inlet and outlet of the blade, Power. Net head of turbine. c) Losses in water channel (Penstock). Note: Point (2) presents inlet and while point (1) presents outlet section of blade. Adjustable guide vane Blade n
QUESTION 7 multi-stage axial flow turbine, and the pressure drop Air is expanded in a very small. Assuming that air behaves as a pressure-temperature relationships for the following processes: across each stage is perfect gas with ratio of specific heats y, derive A) Reversible adiabatic expansion: B) Irreversible adiabatic expansion, with small stage efficiency np; C) Reversible expansion in which the heat loss in each stage is a constant fraction k of the enthalpy drop in that stage.
4. to convert the kinetic energy of water into the mechanical shaft energy. Water enters the turbine, at the inlet, with the velocity Vin = 40m/s and the mass flow rate m=1,000kg/s. Water exits the Vi,z40ms turbine with a negligible velocity, say, Vout = 0 m/s.The efficiency of m - loooly/s Figure on the right shows a hydraulic turbine designed HzO HzO the turbine is 75 %. Potential energy and flow work can be ignored. 4а. Please calculate the specific kinetic energy of water entering the turbine ( ɛr or ke; in J/kg). 4b. Please calculate the rate of total kinetic energy of the water flow ( É̟ or KĖ ; in J/s or W) 4с. Please determine the mechanical power output of this turbine (Wou; in W or kW). 4d. Please determine how much mechanical energy would this turbine generate during an hour
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= 0.547 59.6 Scanned by CamScanner 938 Power Plant Engineering 16 km. The efficiencies of turbine and generator are 93% each. The density os water is 1025 kg/m³. Calculate (a) the quantity of water flowing through c turbine at maximum output in m/s, (b) the surface area of reservoir in km², (c) the wash behind the embankment at full reservoir capacity, (d) energy produced in TWh per year. (1 TWh (tera-watt hour) = 10° GWh= 10° MWh= 10° kWh=10'² Wh=3.6× 10!5 , %3D %3D %3D
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Q4. A typical 4-cylinder 1.6 Liter 4-stroke gasoline engine runs at 6,000 rpm with an overall thermal efficiency of 25% and volumetric efficiency of 90%. (a) Estimate the power produced by the engine. (b) Calculate the SFC and fuel flowrate. (c) The air mass flowrate and BMEP.
Example (1-2): A pump delivers water from a tank A (water surface elevation =110 m) to tank B (water surface elevation = 170 m). The suction pipe is 45 m long (friction factor, f = 0-024) and 35 cm in diameter. The delivery pipe is 950 m long (f = 0·022) and 25 cm in diameter. The head discharge relationship for the pump is given by Hp = (90 – 8000 Q²), where Hp is in metres and Q in m³/s. Calculate: (i) The discharge in the pipeline. (ii) The power delivered by the pump.
ulaglai Un le. Q3: A: In a reaction turbine, the angles of receiving tips are 35° and of discharging tips, 20°. The blade speed is 100 m/s. Calculate the tangential force, power developed, diagram efficiency, and axial thrust of the turbine, if its steam consumption is 1 kg/min. Draw the velocity diagram on scale.
QI: If the overall efficiency of the system and turbine in the figure below is 80 percent. What power is produced for H=60m and Q= 30m'/s? H 3 m diam Water
5. Consider two tanks, A and B, each with a large opening at the top. The two tanks contain different liquids. A small hole is made in the side of each tank at the same depth h below the liquid surface, but the hole in tank A has three times the cross-sectional area of the hole in tank B. (a) If it is known that the mass flow rate is the same for the two holes, find the ratio of PALPB of the densities of the liquids in tanks A and B. (b) (c) equal volume flow rates, what height above the hole must the liquid in tank A be just then? Find the ratio RVAIRVB of the volume flow rates from the two tanks. At one instant, the liquid in tank B is 90 cm above the hole. If the tanks are to have
Q2/ An outward flow reaction turbine has tangential velocity at its inner rim as 20 m/s, and ratio of radii is 0.9. The turbine is placed 1 m below the water surface and blade angle are 90° and 20° at inlet and outlet respectively. The radial velocity of flow at inlet is 6 m/s. Neglecting frictional losses and taking the discharge as radial, draw velocity triangles at inlet and outlet and find: (a) guide vane angle (b) the velocity of water from the guides. (c) total head of water (d) hydraulic efficiency

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