Bharat Heavy Electricals Limited Power-Gen India & Central Asia 2012 19 – 21 April 2012 Features of BHEL Supplied Features of BHEL Supplied Supercritical Steam Turbine Supercritical Steam Turbine Swapan Kr. Bhattacharyya Swapan Kr. Bhattacharyya BHEL, Haridwar BHEL, Haridwar
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Features of BHEL Supplied Supercritical Steam Turbine
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Bharat Heavy Electricals Limited
Power-Gen India & Central Asia 2012 19 – 21 April 2012
Features of BHEL Supplied Features of BHEL Supplied
Power-Gen India & Central Asia 2012 19 – 21 April 2012
Source : CEA
BHEL an Overview :
� BHEL i.e Bharat Heavy Electricals Limited, is the state
owned largest Engineering & Manufacturing Company.� It is the 12th largest power equipment manufacturer in
the world.� BHEL is the only Indian Engineering company
which ranked 9th most Innovative company in the world by US business magazine Forbes in 2011.
� It is also placed at 4th place in Forbes Asia's Fabulous 50 List of 2010.
� BHEL bagged many more prestigious National & International accolades.
� BHEL has 14 manufacturing divisions, 4 power sector regional centres, over 100 project sites, 8 service centres and 18 regional offices.
Bharat Heavy Electricals Limited
Power-Gen India & Central Asia 2012 19 – 21 April 2012
Source : CEA
…..BHEL an Overview :
� Our greatest strength is our highly skilled and
committed workforce of more than 46,000 employees.� About 72% of the total power generated in India is
produced by equipment manufactured by BHEL.
� BHEL Haridwar plant has manufactured and supplied around 250 steam turbines sets of different ratings of 100 / 195 / 200 / 210 / 250 & 500 MW to different power stations in the country, which forms the backbone of India’s power infrastructure.
� The company has also introduced new rating Thermal sets of 270 / 300 / 525 & 600 MW in subcritical range.
� The company has proven turnkey capabilities for executing Power projects right from the concept to
commissioning.� We have a Technical Collaboration Agreement with
Siemens for Steam Turbine.
Bharat Heavy Electricals Limited
Power-Gen India & Central Asia 2012 19 – 21 April 2012
Source : CEA
Bharat Heavy Electricals Limited
Power-Gen India & Central Asia 2012 19 – 21 April 2012
System Diagram
Bharat Heavy Electricals Limited
Power-Gen India & Central Asia 2012 19 – 21 April 2012
Features of BHEL supplied, Siemens design Steam Turbines
BHEL supplied, Siemens design Steam Turbines are equipped with advance and proven design features:-
� Overload valve.
� Internal bypass cooling system in HP Turbine.
� Low reaction diagonal blades.
� Advance class blading.
� EHA-based high pressure governing system.
Bharat Heavy Electricals Limited
Power-Gen India & Central Asia 2012 19 – 21 April 2012
Isometric View of 660 MW Steam Turbine
Bharat Heavy Electricals Limited
Power-Gen India & Central Asia 2012 19 – 21 April 2012
Isometric View of 800 MW Steam Turbine
Bharat Heavy Electricals Limited
Power-Gen India & Central Asia 2012 19 – 21 April 2012
• Single flow
• Double shell casing
– Inner casing vertically split
– Outer casing barrel type & axially divided
– Single exhaust in L/H
• Mono block rotor
• Casing mounted valves
• Internal bypass cooling
• Transported as single unit
HP TurbineHP Turbine
Bharat Heavy Electricals Limited
Power-Gen India & Central Asia 2012 19 – 21 April 2012
HP Turbine Additional Features
Bharat Heavy Electricals Limited
Power-Gen India & Central Asia 2012 19 – 21 April 2012
• Better guidance of Radial flow into Axial flow
• No leakage losses
HP Turbine Diagonal Low Reaction stage
Bharat Heavy Electricals Limited
Power-Gen India & Central Asia 2012 19 – 21 April 2012
• Double flow
• Double casing design with horizontal split
• Inlet from Lower half
• Single Exhaust from upper half
• Extraction connections from lower half
• Admission blade ring
IP Turbine
Exhaust
Bharat Heavy Electricals Limited
Power-Gen India & Central Asia 2012 19 – 21 April 2012
• Double flow
• Double shell casing
• Single admission from top half
• Outer Casing & condenser rigidly connected
• Push rod arrangement to minimize axial clearances
• Mono block rotor
• Inner / Outer casing fabricated
LP Turbine
Bharat Heavy Electricals Limited
Power-Gen India & Central Asia 2012 19 – 21 April 2012
3-dimensional variable stage reaction blades for each
individual stage, to maximize the efficiency.
Advance Class Bladings : 3DV Blades
Bharat Heavy Electricals Limited
Power-Gen India & Central Asia 2012 19 – 21 April 2012
Governing System
� Governing system controls the steam flow to the turbine in response to the control signals.
�� Throttle Governing.
� Steam Turbine is equipped with High Pressure Governing System.
Bharat Heavy Electricals Limited
Power-Gen India & Central Asia 2012 19 – 21 April 2012
Turbine Startup & Operation:
� Turbine Controller take care of automatic turbine start-up sequence.
� Maximum possible flexibility in the hands of the operator : Three different start-up modes can be selected, which are Fast, Normal & Slow.
Bharat Heavy Electricals Limited
Power-Gen India & Central Asia 2012 19 – 21 April 2012
BHEL ’s Manufacturing Facilities
CNC FIR TREE GROOVE MILLING MACHINE
CNC Vertical Borer
3DS Blade machining on 5-axis CNC Milling M/c
Bharat Heavy Electricals Limited
Power-Gen India & Central Asia 2012 19 – 21 April 2012
BHEL ’s Manufacturing Facilities
Overspeed & Vacuum Balancing Tunnel
For balancing and overspeed testing of rotors upto 320T, 18M and Ø6900mm under vacuum condition of 1 Torr
Bharat Heavy Electricals Limited
Power-Gen India & Central Asia 2012 19 – 21 April 2012
CONCLUSION
The overall benefits of BHEL supplied supercritical sets are:
� Quick start up and Load Changes � Operational flexibility
� Option to choose different start-up modes between fast, normal & slow. � Continuous information on residual turbine life. � Turbine is capable of long term reliable operation
� BHEL has very dedicated & rich experienced engineering manpower, who are also deployed at site whenever required.
� Modernised manufacturing facilities to ensure delivery of quality product.
Bharat Heavy Electricals Limited
Power-Gen India & Central Asia 2012 19 – 21 April 2012