A Kaplan turbine working under a head of 20 m develops 11800 kW. The outer diameter of the runner is 3.5 m and hub diameter 1.75 m. The guide blade angle at the extreme edge of the runner is 35°. The hydraulic and overall efficiencies of the turbine are 88% and 84% respectively. If the velocity of whirl is zero at outlet determine. (i) Runner inlet and outlet vane angles at the extreme edge of the runner and (ii) Speed of the turbine. 16:

A Kaplan turbine working under a head of 20 m develops 11800 kW. The outer diameter of the runner is 3.5 m and hub diameter 1.75 m. The guide blade angle at the extreme edge of the runner is 35°. The hydraulic and overall efficiencies of the turbine are 88% and 84% respectively. If the velocity of whirl is zero at outlet determine. (i) Runner inlet and outlet vane angles at the extreme edge of the runner and (ii) Speed of the turbine. 16:

Refrigeration and Air Conditioning Technology (MindTap Course List)

8th Edition

ISBN:9781305578296

Author:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson

Publisher:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson

Chapter40: Typical Operating Conditions

Section: Chapter Questions

Problem 10RQ: The seasonal energy efficiency ratio (SEER) includes the energy used in the _____and _____cycles.

See similar textbooks

Similar questions

A rection turbine has guide vane angle 30° the runner blades make an angle of 80° relative to the tanget at inlet .the blades width at inlet is 1/4 of the outer diameter .the water does not have any tanget velocity at outlet.the head is 25 m and the rotational speed of the runner is 16.67 rotation per second (rps) the turbine efficiency is 88% determine the runner diameter at the inlet and the power developed by this turbine
3. For a Pelton turbine the pressure of the flow before the nozzle is 5 bar while the velocity of flow leaving the nozzle is 31m/s. If the speed of the turbine is 500 rpm and the wheel diameter is 1.5 m, the efficiency of the nozzle will be: а. 0.96 b. 0.97 c. 0.98 d. 0.99 e. None of the them.
A turbine of 9000 B.H.P. is working under a head of 25 mand runs at 100 R.P.M.- What will be the type of turbine ? Whatshould be its speed and power, when it is working under a head of16 m?
A reaction turbine has guide vanes at an angle of 30° and the runner blades make an angle of 80° relative to the tangent at inlet. The blades width at the inlet is 4 of the outer diameter. The water does not have any tangential velocity at the outlet. The head is 25 m and the rotational speed of the runner is 16.67 rotations per second. The turbine efficiency is 88 %. Determine the turbine runner diameter at the inlet and the power developed.
A Kaplan turbine working under a head of 43 m deve-lops 15,400 B.H.P. The dia of theboss is 0"3 times the dia ofrunner. Determine the speed and dia of runner, if speed ratio is2, flow ratio as 0-65 and overall efficiency as 91%.
2. A centrifugal pump consists out of an impeller, diffuser and casing and is powered by 300 kW (shaft power) and rotates at 96.3 rad/s. The flow rate generated by the machine is54.7 Kilo-litres/min. The impeller blade inlet angle and width is 23° and 180 mmrespectively. The blades occupy 12% of the impeller area and the water is assumed toenter the impeller radially. Suction and delivery pipes are equal in size. Determine:2.1. The impeller inlet (i) diameter and inlet blade velocity. (Hint - Substitution: Vfi in terms of Di and Ui in terms of Di both sub into Tan of Blade inlet angle, only unknown is then solving for Di2) 2.2 If the pump has a mechanical efficiency of 80%, calculate the blade velocity at outlet (Uo) and outlet whirl velocity Vwo. Assume the blade exit angle equal to the guide vane angle. (Hint - Substitution: Write Vwo in terms of Uo sub in Euler equation only unknown then is solve for Vwo 2.3 Impeller outer diameter. 2.4 If the flow through velocity is consistent…
A Pelton wheel is designed for producing a mechanical output of12,000 kW while working under a head of 400 m and running at 750rpm. If three jets are used for running the wheel then determine theoverall efficiency of the wheel. The jet diameter is one-fifth of thewheel diameter and the speed ratio is 0.48. Assume a proper value forthe coefficient of the nozzle.
A Pelton wheel turbine is to operate under a head of 25 m at 200 r.p.m. If the discharge is 9 m /s and turbine efficiency is 90%. Calculate power generated by the turbine, specific speed of the turbine and performance of turbine under a head of 20 m. Also state the type of turbine.
A single jet Pelton wheel is required to drive a generator to develop 10Mw. The available head at the nozzle is 762m. Assuming electric generator efficiency is 95%, Pelton wheel efficiency 87%, coefficient of velocity 0.97, mean bucket velocity 0.46 of the jet velocity, outlet bucket angle 15° and the friction of bucket reduces the relative velocity by 15%, find (a) the flow rate of water through turbine (b) the diameter of the jet (c) the force exerted by the jet to the nozzle.
The penstock if hydro-electric plant is 0.5 x 0.5 m with velocity of 5.5 m/sec has a head of 20 m. What is the output of the turbine if the turbine efficiency is 87%? A. 845.32 kW B. 789.34 kW C. 654.56 kW D. 234.56 kW
What is the turbine output of 100m head and delivering 1 cu. m/ sec in a hydro electric power plant if turbine efficiency is 88%?
A centrifugal pump consists out of an impeller, diffuser and casing and is powered by 300 kW (shaft power) and rotates at 96.3 rad/s. The flow rate generated by the machine is54.7 Kilo-litres/min. The impeller blade inlet angle and width is 23° and 180 mmrespectively. The blades occupy 12% of the impeller area and the water is assumed toenter the impeller radially. Suction and delivery pipes are equal in size. Determine: a) If the pump has a mechanical efficiency of 80%, calculate the blade velocity at outlet (Uo) and outlet whirl velocity Vwo. Assume the blade exit angle equal to the guide vane angle. (Hint - Substitution: Write Vwo in terms of Uo sub in Euler equation only unknown then is solve for Vwo)