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| 300MW STEAM TURBINE |
Turbine is a prime mover. It can rotate pump, compressor, alternator etc.
Types of Turbine:-
There are three types
1. Gas Turbine
2. Steam Turbine
3. Water Turbine
Gas Turbine:-
Gas fired directly inside the casing and diffuser, heat power rotates the rotary.
Steam Turbine:-
Steam will flow inside the turbine through NAZZLE by HP/IP/LP three stages, it can be rotated the rotary.
Water Turbine:-
Water pressurized then injected through NAZZLE and VANES, it can be rotated rotary.
Pressure should be controlled by PCV (Butterfly Valve)
The entire turbine should be governed by Governor.
(Governor-Speed controlling mechanism for variation of load.)
Types of Governor:-
1. Hit and miss governing
2. Quality governing
3. Quantity governing
Types of Steam Turbine:-
1. Evaporation Type- More than atmosphere pressure.
2. Condensate Type-Less than atmosphere pressure.
Types of Water Turbine:-
1. Impulse Type-Water directly the injected in VANES.
2. Reaction Type-Water indirectly the injected in VENES.
Steam Turbine Standard Code:-
API 611, API 612
(API stands-American Petroleum Institute.)
RPM – Revolution per Minute
Process variables:
Steam Temperature : 535⁰C
Steam Pressure : 150 bar
RPM : 3000
Capacity : 300 MW
Make : Toshiba, Japan.
Parts of Turbine:-
- Bottom Casing
- Top Casing
- Rotar HP/IP/LP
- Diffuser
- Venes
- Lube Oil Pump
- Nazzle
- Pressure Control Valve
- Governor
- Journal Bearing
- Timing Gear
- Starting Motor
- Forced Close Non return valve (FCNRV)
- Over Speed Tripping Mechanism
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