Asia Pacific Partnership on Clean Development & Climate Brown Coal ( Lignite ) Best Practices Work Shop India - Country Perspective 23-27 th June2008 . NTPC Delegates : I.K.Rajdeva , Additional General Manager, NTPC Ltd .
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Brown Coal ( Lignite ) Best Practices
India - Country Perspective
23-27 th June2008
I.K.Rajdeva, Additional General Manager, NTPC Ltd.
A.Nagasundaram, Dy. Gen. Manager, NTPC Ltd.
Saju K Sebastian, Dy. Gen. Manager, NTPC Ltd.
P.S.Chatterjee, Chief Design Engineer, NTPC Ltd.
CESC Delegates :
Souvik Dutta, Station Manager, Southern generating Station, CESC Ltd .
Kushal Bhowmick, Senior Manager ( Environment), CESC Ltd.THE INDIAN DELEGATION
THE GDP GREW AT 9.6% DURING FISCAL 2007, AVERAGE RATE OF GROWTH OVER LAST 4 YEARS IS 8.6%.
GDP GROWTH DURING 2008-09 IS EXPECTED TO BE around 9%.
GDP GROWTH TARGET OF 9% SET BY GOVT. DURING XI PLAN (2007-2012).
ELECTRICITY IS AN IMPORTANT INPUT TO THE MARCH OF PROGRESS OF ANY COUNTRY TODAY.
IT IS THEREFORE NATURAL THAT THE GROWTH IN ELECTRICITY GENERATION & AVAILABILITY, BE COMMENSURATE WITH GROWTH IN GDP.
Sector wise break-up (MW)
Fuel wise break-up (MW)
(Excluding captive capacity of 14636 MW connected to grid)
(All figures provisional from CEA)
Total generation in 2007-08 – 704.45 BU
DURING 2007-08, PEAKING SHORTAGES WERE 16.6%
NATIONAL ELECTRICITY POLICY TARGETS PER CAPITA AVAILABILITY OF 1000 KWH BY 2012
Figures in kwh
Source: UNDP Human Development Report 2007-08 – Data for 2004
CAGR of 7.3%
Source: Integrated Energy Policy GOI
Large Capacity addition required to meet the demand
Thermal – 59,513MW
( Coal – 51,890 MW, Gas- 5343 MW, Lignite- 2280 MW)
Additional capacity expected : New Renewables – 14,000 MW
: Captive – 12,000 MW
Proposed : 78,577 MW
Expected : 78,520MW
9,263 MW capacity already commissioned
60,214 MW (77%) under construction
10,950 MW - Letter of awards yet to be placed
Fuel Availability for 96% of coal based stations – tied up
88% hydro capacity under construction /commissioned
All gas based projects under execution or gas tied up from local sources
Additional 13,000 MW gas based projects identified – subject to gas availability
11TH PLAN PROGRAMME (Conventional) NON-CONVENTIONAL ENERGY PLANTS
Energy Efficiency (Conventional)
GOVERNMENT’S STRAGTEGY / INITIATIVE FOR EFFICIENCY IMPROVEMENT
NATIONAL THERMAL POWER CORPORATION LTD.
- A PROFILE
Setting the Scene today for a future-oriented Sustainable Energy production
INDIA’s ENERGY PROGRAMS AND POLICIES (Conventional)
Demand of power is set to grow with growing economy (Conventional)
Large capacity needs to be added to meet the projected growth in demand
With Electricity Act 2003 coming into vogue, the power market is set to attract a lot of investors and competition
With tariff based bidding becoming a norm, utilities have to bring down their cost of generation to remain competitive
Increased emphasis on Environmental considerations for clean technology
CDM opportunities arising out of global warming concerns
Fuel, Land & Water availability becoming more and more difficult
Efficiency enhancement feasible in future plants as well as existing plantsDRIVERS FOR HIGHER PLANT EFFICIENCY
Improvement in efficiency and performance of existing generating units through :
Renovation and Modernisation schemes with emphasis on Energy Efficiency
Partnership in excellence.
Establishment of Energy Efficiency cells at thermal power stations ( 37 cells in operation)
Energy Conservation through legislation
Thermal Power Stations notified as Designated consumers
Promotion of Renewable Energy Sources
15,627 MW Capacity of Hydro Power planned in XIth Plan
30,000 MW Capacity of Hydro Power planned in XIIth Plan
Retiring 5000 MW old capacity with low efficiency in 11th PlanMajor Initiatives ……
Designated Consumers Notified generating units through :
Thermal Power Station
Appoint Energy Manager
Get Energy Audits conducted by Accredited Energy Auditors
Implement techno-economic viable recommendations given by Accredited Energy Auditor
Comply with norms of specific energy consumption fixed
Submit report on steps taken
Major Initiatives …..Energy Conservation Act 2003 (EC Act)
Adoption of Clean Coal Technologies generating units through :
Supercritical / Ultra supercritical Technology
Circulating fluidized bed combustion (CFBC)
Integrated Gasification Combined Cycle (IGCC) Suitable for Indian Coal
Presently Working to develop a Demonstration Project for IGCC along with suitable Partner, development of core technologies for gasifier & Gas cleaning systems suitable for High Ash Indian Coal.Major Initiatives……
Ultra Mega Power Projects(4000MW capacity) based on Supercritical Technology at various pithead and coastal locations.Envisaging Mandatory Higher size thermal units (660/800 MW) with Supercritical Parameters.
It is estimated to commission
10 Nos. units of 660MW (XIth Plan)
2 Nos. units of 800MW (XIth Plan)
12 Nos. units of 660MW (XIIth Plan)
31 Nos. units of 800MW (XIIth Plan)Major Initiatives …..
Major Initiatives ….. Supercritical Technology at various pithead and coastal locations.
43% Supercritical Technology at various pithead and coastal locations.
Gross Efficiency, GCV Basis
The Efficiency Roadmap
The reported efficiency of Indian power plants is generally lower as compared to efficiency of plants abroad, primarily due to :
Poorer condenser vacuum due to hot climatic conditions
Higher unburnt carbon losses in boiler due to low grade high ash Indian coal
Efficiency is reported on HHV basis of coal (same as the practice followed in USA) as against LHV used elsewhere.Lower Plant Efficiency in India
Typical variation due to above = 3.0 to 4.0 % points (Approx.)
Heatrate Improvement over the Years lower as compared to efficiency of plants abroad, primarily due to :
Member of Carbon Sequestration Leadership Forum (CSLF) lower as compared to efficiency of plants abroad, primarily due to :
Participating in FutureGen Project of USA
275 MW coal fired Zero Emission power plant
India contributing US$10 Million
Participating in Asia Pacific Partnership (APP) for Clean Development and Climate
The Indian Project Proposals in the TF Action plan
Inputs like case studies & contact details of experts in areas of India’s interest.
Work on Efficiency improvement of two thermal power plants namely Ropar and Kolaghat thermal Power station already started with support of USAID.Major Initiatives Contd …..
Major Initiatives ….. lower as compared to efficiency of plants abroad, primarily due to :
A COST EFFECTIVE APPROACH ……
CONTINUE GETTING THE BEST OUT OF EXISTING FLEET
Improvement in performance parameters – PLF, Availability, heat rate/efficiency, auxiliary power consumption, partial loading & forced outage.
Restore derated capacity
Extension of economic life.
Obsolescence & non availability of spares (eg C&I)
Environmental issues/other statutory requirements.
Safety requirements.NEED FOR R&M – EXISTING UNITS
A large number of 200/250 MW & some 500 MW Units are in operation for more than 15/20 years and have considerable potential for life extension & efficiency improvementPOTENTIAL FOR EFFICIENCY INTEGRATED R&M
Shift in focus from ‘Generation Maximization to ‘Plant Performance Optimization’ – Older units have many more opportunities to reduce heat rate than newer units.
Retirement of very old small size low efficiency units and replacement with higher efficiency units.
Use of high end technology solutions for efficiency enhancement to manage rising costs & reduce carbon, foot prints, e.g.,
Steam flow path modification
Steam turbine and boiler upgrades
Improved plant controlFUTURE APPROACH TOWARDS R&M
Additionality in efficiency improvement Performance Optimization’ – Older units have many more opportunities to reduce heat rate than newer units.
Efficiency improvement as a result of normal R&M, aims at to minimising losses ( to approach design values)
Efficiency improvement through technology intervention/enhanced R&M, targeting efficiency enhancement even beyond design value.FUTURE APPROACH TOWARDS R&M …
Fly Ash Utilization Record – NTPC Performance Optimization’ – Older units have many more opportunities to reduce heat rate than newer units.AS A SAMPLE CASE ONLY
Forest Banks concept Performance Optimization’ – Older units have many more opportunities to reduce heat rate than newer units.
NTPC has created a Green wealth of 18.2 Million Trees by Summer 2007
Plantation of 1.25 Million trees around Ramagundam Project has resulted in Summer Peak temperature reduction by 3 deg C
Ash Mound Reclamation and Dry ash disposal systemAfforestation Efforts – A Priority for sustenance of HUMANITY!!
THANK YOU Performance Optimization’ – Older units have many more opportunities to reduce heat rate than newer units.