Download - A Seminar on Tesla Turbines
A Seminar On
TESLA TURBINES
PRESENTED BY
SOUGANTH SUGATHAN MANJHIPARAMBIL
ISAMEME057
“The desire that guides me in all I do is the desire to harness the forces of nature to the service of
mankind.”
Nikola Tesla (1856 – 1943)
Dept. of Mechanical Engg. 2IESCE
CONTENTS
• INTRODUCTION• CONSTRUCTION• BOUNDARY LAYER CONCEPT• THEORY OF OPERATION• EFFICIENCY OF TESLA TURBINES• APPLICATIONS• PICO HYDRO• TESLA TURBINES AND PICO HYDRO• ADVANTAGES• DISADVANTAGES• CONCLUSION• REFERENCES
Dept. of Mechanical Engg. 3IESCE
INTRODUCTION
• Tesla turbine is a bladeless turbine.
• It was patented by Nikola Tesla in 1913.
• It is a radial type turbine.
• Also known as Prandtl layer turbine and boundary layer turbine.
Dept. of Mechanical Engg. 4IESCE
Dept. of Mechanical Engg. 5IESCE
PARTS OF A TESLA TURBINE
CONSTRUCTION
There are mainly 2 parts in the turbine.
Rotor
• Consists of series of smooth discs mounted on a shaft .
• Each disk is made with openings surrounding the shaft.
• These openings act as exhaust ports through which the fluid exits.
Dept. of Mechanical Engg. 6IESCE
Stator
• The rotor assembly is housed within a cylindrical stator, or the stationary part of the turbine.
• Each end of the stator contains a bearing for the shaft.
• The stator also contains one or two inlets, into which nozzles are inserted.
Dept. of Mechanical Engg. 7IESCE
• To make the turbine run, a high-pressure fluid enters the nozzles at the stator inlets.
• The fluid passes between the rotor disks and causes the rotor to spin.
• Eventually, the fluid exits through the exhaust ports in the center of the turbine.
Dept. of Mechanical Engg. IESCE 8
BOUNDARY LAYER CONCEPT
• A layer of fluid developing in flows with very high Reynolds Number, Re, that is with relatively low viscosity as compared with inertia forces.
• Observed when bodies are exposed to high velocity air stream or when bodies are very large and the air stream velocity is moderate.
Dept. of Mechanical Engg. 9IESCE
Dept. of Mechanical Engg. 10IESCE
THEORY OF OPERATION
• As the fluid moves past each disk, adhesive forces cause the fluid molecules just above the metal surface to slow down and stick.
• The molecules just above those at the surface slow down when they collide with the molecules sticking to the surface.
• These molecules in turn slow down the flow just above them.
Dept. of Mechanical Engg. 11IESCE
• The farther one moves away from the surface, the fewer the collisions affected by the object surface.
• At the same time, viscous forces cause the molecules of the fluid to resist separation.
• This generates a pulling force that is transmitted to the disk, causing the disk to move in the direction of the fluid.
Dept. of Mechanical Engg. IESCE 12
Dept. of Mechanical Engg. 13IESCE
EFFICIENCY VS RPM CURVE
Dept. of Mechanical Engg. 14IESCE
EFFICIENCY OF TESLA TURBINES
• Tesla claimed a theoretical efficiency of the order of 95%.
• Actual turbine efficiency is estimated to be about 60%.
• Practical results seems to be lower than conventional turbines.
Dept. of Mechanical Engg. 15IESCE
APPLICATIONS
• It can be converted into a pump, called Tesla pump.
• As a multiple-disk centrifugal blood pump.
• Pico Hydro applications.
• Fluids with high viscosities, abrasives, solid particles or two phase fluids.
• As a waste pump.
• As a wind turbine
Dept. of Mechanical Engg. 16IESCE
PICO HYDRO
• Harness the energy of flowing water at capacities smaller than 5kW.
• Lowest generating cost.
• Low environmental impact.
• Displacement of large populations is not required.
Dept. of Mechanical Engg. 17IESCE
TESLA TURBINE AND PICO HYDRO
• Simple components and design.
• Local setting manufacture lowers capital and maintenance costs.
• Lesser risk of erosion of discs.
Dept. of Mechanical Engg. 18IESCE
ADVANTAGES
• Low production costs.
• Simpler design and manufacture.
• Can be used for a variety of fluids.
• Can be easily reversed into a pump.
Dept. of Mechanical Engg. 19IESCE
DISADVANTAGES
• Low torque.
• Proof of its efficiency compared to conventional turbines is still questionable and needs more research.
• Loss of energy due to friction at high speeds.
Dept. of Mechanical Engg. 20IESCE
CONCLUSION
• Not compatible for applications where conventional machines are adequate.
• Should be considered in applications where conventional methods are inadequate.
• Applications which need small shaft power, highly viscous fluids or non-Newtonian fluids.
Dept. of Mechanical Engg. 21IESCE
REFERENCES
[1] Rice, W., “Tesla Turbomachinery”, International Nikola Tesla Symposium, 1991.
[2] Bryan P. Ho-Yan, “Tesla Turbine for Pico Hydro Applications”, Guelph Engineering Journal, 2011.
[3] S.J. Foo, W.C. Tan and M. Shahril, “Development of Tesla Turbine for Green Energy Application”, National Conference in Mechanical Engineering Research and Postgraduate Studies, 2010
Dept. of Mechanical Engg. 22IESCE
THANK YOU FOR LISTENING!
Dept. of Mechanical Engg. IESCE 23
ANY
QUESTIONS?
GET READY FOR THE QUIZ!!
Dept. of Mechanical Engg. IESCE 24
PROBLEM???
QUESTIONS
1. What is the direction in which fluid enters and exits the turbine?
2. State a major disadvantage of Tesla turbines.
3. Why do you think the Tesla turbine is also named as Prandtl layer turbine?
Dept. of Mechanical Engg. IESCE 25