1. TURBINE & COOLING SYSTEM Presented By – AVIJEET PRATAP 07ME12 IET AGRA.
Presented By – AVIJEET PRATAP
07ME12
IET AGRA

2. DEFINITION
A Turbine is a Form of Engine Requires a suitable working fluid in order to function- a source of High Grade Energy and a Sink for Low Grade energy. When a Fluid Flows through the Turbine ,Part of Energy Content is Continuously Extracted and Converted in to Useful mechanical Work.

3. PRICIPLE OF STEAM TURBINE
Steam turbine depends completely upon the dynamic
action of the steam. According to Newton’s second law of motion, the FORCE is proportional to the rate of change of MOMENTUM (mass x velocity). If the rate of change of momentum is caused in the steam by allowing a high velocity jet of steam to pass over curved blade, the steam will impart a force to the blade. If the blade is free, it will free off (rotate) in the direction of force.
The steam from the boiler is expanded in a passage or nozzle , where due to fall in pressure of steam is converted into Kinetic energy of steam & this KE of steam is converted into work moving blade
mc1
Moving Blade
Force = mc1 - mc2
mc2

4. TYPES OF TURBINE On the basis of principle of operation
Impulse turbine
Reaction turbine
Impulse- Reaction turbine
Impulse Turbine .. In impulse the drop in pressure of steam takes place only in nozzle & not in moving blades. This is obtained by making the blade passage of constant cross section area it may be noted that energy transformation takes place only in nozzles. Moving blades only cause energy transfer. X X X

5. Reaction turbine:-
Pressure drop take place in rotor (M.B.). Energy transformation takes place in rotor. Energy transfer only in rotor.
Impulse- Reaction turbine:-
In this turbine drop in pressure of steam takes place in fixed blade as well as moving blade. It may be noted that energy transformation occur in both fixed blade & moving blade. The rotor blade cause energy transfer & energy transformation.

6. COMPOUNDING Compounding of Impulse turbine :-
One row of nozzles followed by one row of blades is called a stage of turbines. Compounding is a method for reducing the rotational speed of the impulse turbine to practical limit. Boiler pressure down to condenser pressure in a single stages so high RPM & large diameter of turbine.
Three type of compounding
Pressure compounding
Velocity compounding
Pr & velocity compounding

7. STEAM SUPPLY ~ G HP IP
LP-A
LP-B
CRH
HRH
CONDENSER
CONDENSER
BOILER

8. CROSS SECTIONAL VIEW OF TURBINE

9. COOLING SYSTEM .

10. CIRCULATING WATER SYSTEM
INTRODUCTION
. Circulating Water system supplies cooling water to the turbine condenser. .
It is used to maintain the vacuum in the condenser.

11. Types of Circulating water system
1. Open or Once Through
It is used when there is a large source of water available.
e.g.- river , ocean.
2. Closed Cooling system
In this system, warm water from condenser is passed through a cooling device, like cooling tower.

12. Open or Once Through Condenser River Exhaust Stem from Turbine
Condensate
Filter
Condensate Pump
CW Pump
Hot water
River
Open or Once Through

13. Make up water from river
Exhaust Stem from Turbine
Condenser
Condensate to boiler
Condensate Pump
Cooling water
Hot air
Hot water
Cooling Tower
CW Pump
Make up water from river
Closed Cooling system

14. Cooling tower
It cools the warm water discharged from the condenser & feed the cool water back to the condenser.
It reduces the cooling water demand in the power plant.

15. Types of cooling tower Natural Draught Cooling Tower
Mechanical Draught Cooling Tower
A. Forced Draught Cooling Tower
B. Induced Draught Cooling Tower

16. Losses in cooling tower
1. Evaporation Losses 2. Drift Losses 3. Blowdown Losses

17. LUBE OIL SYSTEM
19 April 2017

18. TURBINE LUBE OIL SYSTEM
1.FLOW DIAGRAM OF LUBE OIL SYSTEM
2.NECESSITY OF LUBE OIL SYSTEM
3.COMPONENTS OF LUBE OIL SYSTEM
4.FUNCTIONS OF INDIVIDUAL COMPONENTS OIL
5.FLOW TO DIFFERENT BRANCHES
6.FIRE PROTECTIONS

19. NECESSITY OF LUBE OIL SYSTEM
Lubrication : To supplies oil to the bearing to form a film of oil as the shaft rotates.
Temperature control : To maintain temperature of the bearing.
Sealing medium : To the prevent H2 leak out along the Generator shaft.
Jacking of shaft : Supply to jacking device.
19 April 2017

20. COMPONENTS OF LUBE OIL SYSTEM
The system mainly consists of Main oil pump, BOP, main oil tank, AC lubricant pump, DC emergency oil pump,MSP, spill valve, oil cooler, Transfer valve, oil smoke separator, shaft jacking up device, oil hydrogen separator, oil level indicator as well as connecting lines, monitoring instruments, etc.

21. Main Oil Tank
The oil tank adopts a combination mode as various devices allocated on the tank as
AC lube oil pump,
DC emergency oil pump,
Oil smoke separator,
Oil level indicator,
Electric heater,
Spill valve,
BOP
MSP
19 April 2017

22. SEAL OIL SYSTEM
INTRODUCTION Hydrogen is used for the cooling of generator rotor. Hydrogen is so much explosive when it come into contact with air . To save this hydrogen from explosion we need sealing of this hydrogen. For this purpose we generally use oil. This sealing is very much similar to sealing of the pump on its gland.

23. The functions of the seal oil control system
Providing seal oil to a sealing continuously
Prevent the escape of hydrogen gas from the generator at the point of rotor exit . A continuous film between the rotor collar and seal liner is maintaining by means of oil at a pressure which is slightly above then hydrogen pressure.

24. STATOR WATER COOLING SYSTEM FUNCTION
The Stator Coil Cooling Water System main function is to guarantee cooling water uninterrupted flow into stator coil. At the same time, the system also must control enter the stator coil water pressure , flow, temperature, conductivity

25. System consists of
2 Motor driven pumps,
2 Coolers,
2 Filters and
1 mixed Bed type Ion Exchanger.

26. EE OF Gen. Teflon tubes Winding TE of Gen Expansion tank
Hot water output to
Expansion tank
Cold water enter
Generator
Turbine end
Excitation End

27. Any Questions

28. THANK YOU