BHEL Bhopal manufactures steam turbines and other power equipment. A steam turbine converts the energy of steam into rotational mechanical energy through a series of fixed nozzle blades and moving rotor blades. There are two main types of steam turbines: impulse turbines, where steam expands only in nozzles, and reaction turbines, where steam expands in both nozzles and blades. Reaction turbines have more stages than impulse turbines but occupy more space for the same output. The presentation concluded that steam turbines efficiently convert the potential energy of steam into useful mechanical work.

1. Industrial Summer Training
BHEL BHOPAL
Presentation By: mahesh

2. Content
1. Introduction
2. Type Of Products
3. Steam Turbine
4. Conclusion

3. Introduction
BHEL BHOPAL

4. INTRODUCTION
1. BHEL is the largest power equipment
manufacturer in India and 7th largest in the world.
2. Founded in 1964.
3. First plant was build in Bhopal.

5. INTRODUCTION
4. Engaged in the
Design, Engineering,
Manufacture,
Construction, Testing,
Commissioning and
Servicing of a wide
range of products and
services.
UHV Testing Workshop

6. Presence
-15 manufacturing divisions
- 2 repair units
- 4 regional offices
- 8 service centres
- 8 overseas offices
- 15 regional centres and
- Currently operates at more than 150 projects
sites across India and abroad.

7. .... and....
BHEL is ranked ninth most
innovative company in
the world by US business
magazine forbes.

8. Summer Training
Study Of Steam Turbine
BHEL Bhopal

9. What is a turbine?
Turbine is a engine
that converts energy
of fluids into
mechanical energy.

10. A steam turbine is a steam driven rotary
engine.

11. Principle of steam
turbine
1. Steam energy is
converted in mechanical
work by expansion though
the turbin.
2. Expansion takes place
through a series of fixed
blades(nozzles) and moving
blades.
3. In each row fixed blade
and moving blade are called
stage.

12. Turbine rotor and
Blades
Roto
r
Turbine Blades

13. Rotor and Casing of Steam Turbine:
1. High pressure turbine
2. Intermediate pressure turbine
3. Low pressure turbine

14. Types of Steam Turbine
There are two main types:
1. Impulse Steam Turbine
2. Reaction Steam Turbine

15. Impulse Turbine
Reaction Turbine

16. Impulse Steam
Turbine
1. In Impulse Steam Turbine, a jet of steam from a fixed
nozzle pushes against the rotor blades and moves them
forward.
2. The velocity of steam is twice as fast as velocity of the
blades.

17. Reaction Steam Turbine
1. A Reaction Steam
Turbine utilizes a jet of
steam that flows from a
nozzle on the rotor.
2. The steam is directed
into the moving blades
by fixed blades
designed to expand the
system.

18. Schematic Diagram

19. Difference between Impulse and Reaction
Steam Turbine
1.In Impulse type. steam expands in the nozzle. So its
pressure remains constant on both ends of the moving
blades whereas In Reaction Type, Fixed blades act as
nozzles. So steam expands both in fixed and moving
blades continuously as it passes over them. Thus the
pressure drop occurs in this.
2. In Impulse type the blades are of symmetrical profile
types, so manufacturing is easy whereas in the reaction
type the blades are non-symmetrical type, so
manufacturing is difficult.

20. 3. Number of stages in impulse steam turbine is less
as compared to the number of stages in reaction
steam turbine.
4. Impulse Steam Turbine occupies less space for
same output compared to reaction type.

21. Advantages Of Steam
Turbine
1. Thermal efficiency of a steam turbine is higher than
steam engine.
2. The steam turbine develops power at a uniform rate
and hence does not required Flywheel.
3. In a steam turbine there is no loss due to initial
condensation of steam.
4. In steam turbine no friction losses are there.

22. Disadvantages of Steam Turbine
1. High efficiency is obtained only at high speed.
2. They are very heavy and cumbersome.
3. Due to big size and heavy weight, transportation and
installation is not easy.
4. Turbine can rotate in only one direction.

23. Conclusion
The steam turbine is a prime mover in which the
potential energy of steam is transformed into the
kinetic energy, and then transferred into mechanical
energy by turbine shaft. So it is concluded that steam
energy is very useful for mechanical work.

24. THANK YOU