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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 Supercritical Steam Turbine Supercritical Steam Turbine Swapan Kr. Bhattacharyya Swapan Kr. Bhattacharyya BHEL, Haridwar BHEL, Haridwar

Features of BHEL Supplied Supercritical Steam Turbine

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Page 1: Features of BHEL Supplied Supercritical Steam Turbine

Bharat Heavy Electricals Limited

Power-Gen India & Central Asia 2012 19 – 21 April 2012

Features of BHEL Supplied Features of BHEL Supplied

Supercritical Steam TurbineSupercritical Steam Turbine

Swapan Kr. BhattacharyyaSwapan Kr. Bhattacharyya

BHEL, HaridwarBHEL, Haridwar

Page 2: Features of BHEL Supplied Supercritical Steam Turbine

Bharat Heavy Electricals Limited

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.

Page 3: Features of BHEL Supplied Supercritical Steam Turbine

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.

Page 4: Features of BHEL Supplied Supercritical Steam Turbine

Bharat Heavy Electricals Limited

Power-Gen India & Central Asia 2012 19 – 21 April 2012

Source : CEA

Page 5: Features of BHEL Supplied Supercritical Steam Turbine

Bharat Heavy Electricals Limited

Power-Gen India & Central Asia 2012 19 – 21 April 2012

System Diagram

Page 6: Features of BHEL Supplied Supercritical Steam Turbine

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.

Page 7: Features of BHEL Supplied Supercritical Steam Turbine

Bharat Heavy Electricals Limited

Power-Gen India & Central Asia 2012 19 – 21 April 2012

Isometric View of 660 MW Steam Turbine

Page 8: Features of BHEL Supplied Supercritical Steam Turbine

Bharat Heavy Electricals Limited

Power-Gen India & Central Asia 2012 19 – 21 April 2012

Isometric View of 800 MW Steam Turbine

Page 9: Features of BHEL Supplied Supercritical 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

Page 10: Features of BHEL Supplied Supercritical Steam Turbine

Bharat Heavy Electricals Limited

Power-Gen India & Central Asia 2012 19 – 21 April 2012

HP Turbine Additional Features

Page 11: Features of BHEL Supplied Supercritical Steam Turbine

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

Page 12: Features of BHEL Supplied Supercritical Steam Turbine

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

Page 13: Features of BHEL Supplied Supercritical Steam Turbine

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

Page 14: Features of BHEL Supplied Supercritical Steam 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

Page 15: Features of BHEL Supplied Supercritical Steam Turbine

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.

Page 16: Features of BHEL Supplied Supercritical Steam Turbine

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.

Page 17: Features of BHEL Supplied Supercritical Steam Turbine

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

Page 18: Features of BHEL Supplied Supercritical Steam Turbine

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

Page 19: Features of BHEL Supplied Supercritical Steam Turbine

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.

Page 20: Features of BHEL Supplied Supercritical Steam Turbine

Bharat Heavy Electricals Limited

Power-Gen India & Central Asia 2012 19 – 21 April 2012

Thank

Thank

ss

BHEL, a Company with wide Capabilities