1 / 7

Turbines

Turbines. A turbine is a rotary engine that exerts energy from a fluid flow and converts it into useful work. A hydraulic turbine converts the energy of flowing water into mechanical energy. The operation of a generator is based on the principles discovered by Faraday(electromagnets).

braith
Download Presentation

Turbines

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Turbines • A turbine is a rotary engine that exerts energy from a fluid flow and converts it into useful work. • A hydraulic turbine converts the energy of flowing water into mechanical energy. • The operation of a generator is based on the principles discovered by Faraday(electromagnets).

  2. Hydro Turbines Parts: • A large metal shaft in the center. • At the bottom end of the shaft a series of blades. • The water from the dam is directed into those blades through a group of slots called wicket gates. • At the top end of the generator shaft is the rotor assembly which is a series of wire coils. • The shaft turns the wires through a magnetic field an electrical current is created.

  3. Impulse and reaction turbines: • There are two basic types of turbines according to the mode of water. • Impulse turbine: used for high head of water is available. • Reaction turbine: used for head below 450m.

  4. Impulse turbineWorking principle • It runs by impulse of water. • Nozzle directs the water on the curved blades, which causes them to rotate. • The blades are in the shape of buckets and symmetrical • The energy to rotate an impulse turbine is derived from the kinetic energy of the water flowing through the nozzle. • The potential energy is converted into kinetic energy when it passes through the nozzle. • The velocity of water is reduced when it passes over the blades.

  5. Reaction turbineWorking principle • It has no nozzle. • The turbine fully immersed in water • The water is compressed inside the nozzles and when it came out of the nozzle is occur a difference in pressure, and this difference turns into kinetic energy will occur rotating the turbine (the turbine will rotate because of thedifference in the pressure) • Blades are like the wings of a plane and not symmetrical • Velocity of water is increased when it passes through the fixed blades. • The enthalpy drop in moving blades is called degree of reaction.

  6. Efficiency • To maximize the efficiency of hydro turbine the water is expanded, generating work in a number of stages. • Multiple stages turbines are highly efficient. • Most hydro turbine use a mixture of both impulse and reaction design. • Higher pressure sections are impulse type and lower pressure sections are reaction type.

  7. Types of turbines • Pelton Turbines. • Kaplan Turbines. • Francis Turbines. • Cross-Flow Turbines. • Propeller Turbine. • Turgo Turbines.

More Related