Super critical technology

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Baseline Emission Factor for coal based
supercritical power plants Praveen GuptaDeputy
DirectorCentral Electricity Authority 29th
April,2009
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Methodology

• CDM Approved Consolidated baseline and monitoring
  Methodology ACM0013
• Methodology is applicable to
• Only new electricity generation plants using more
  efficient power generation technology
• Not for cogeneration power plant
• The baseline fossil fuel is used in more than 50
  of total generation
• Availability of data on fuel consumption and
  generation of the power plants

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Applicability of Methodology Applicable to new
coal based generating units with supercritical
parameters (More Efficient Technology)
Supercritical technology efficiency is about 2
higher than conventional technology ( Sub
Critical technology)
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Baseline emissions (BE) are calculated by
multiplying the electricity generated in the
project plant (EG) with a baseline CO2 emission
factor (EF), as follows BEy EGy
EFy Where BEy Baseline emissions in year y
(tCO2) EG,y Quantity of electricity generated in
the project plant in year y (MWh) EFy Baseline
emission factor in year y (tCO2/MWh)
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Baseline Emissions As per methodology ,only CO2
emissions from fossil fuel combustion in the
project are to be considered.
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Baseline Emission Factor (EF) is the lowest
value between following two options Emission
factor of the technology and fuel type that has
been identified as the most likely baseline
scenario (Option 1) and Emission factor
determined based on the performance of the top
15 power plants that use the same fuel as the
project plant and any technology available in the
geographical area. (Option 2)
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Emission factor (option1 )

• The emission factor of the technology and fuel
  identified as the most likely baseline scenario
  is calculated as follows
• EF MIN(EFBLF, EFPJF,) 3.6
  GJ/MWh -----------------------------------
  --------
• 
  ?BL
• EFy Baseline emission factor in year y (tCO2/MWh)
• EFBLF baseline emission factor of the baseline
  fossil fuel type that has been identified as the
  most likely baseline scenario (tCO2 / Mass or
  volume unit)
• EFPJF - Average CO2 emission factor of the fossil
  fuel type used in the project plant in year y
  (tCO2 / Mass or volume unit)
• ?BL is the Energy efficiency of the power
  generation technology that has been identified as
  the most likely baseline scenario

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In case of INDIA The most likely baseline
scenario is construction of power plant of size
500MW based on coal and the fossil fuel to be
used in the proposed project activity is also
coal
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Emission factors (option1 )has been calculated
with following scenario Case 1 Baseline Coal
Sub Bituminous coal Project Coal Sub
Bituminous coal (Indian Coal)
Case 2 Baseline Coal Sub
Bituminous coal Project Coal - Other
Bituminous coal (Imported coal)
(Calculations have been done based on Emission
factor taken from IPCC defaults and also with
National Communication defaults)
Minimum Emission factor calculated (Option 1)
0.987 tCO2/MWh
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Option 2 Emission factor of top 15 performer
power plants

• Identify sample group of power plants based on
• Using same fossil fuel as of proposed project
• that the Projects are constructed in last 5
  years
• The capacity of projects must be in the range of
  50 to 150 of the rated capacity of the CDM
  project.
• Sample group must comprises of at least 10 plants.

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• Calculate the operational efficiency of each
  power plant identified in the sample group
• Select top 15 top performers plants. Calculate
  emission factor from these plants.
• Top 15 performer group should be enlarged until
  the selection represent at least 15 of the total
  generation of sample group plants.

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• The proposed supercritical units that are
  proposed to be installed are of the range 660 MW
  to 800 MW. Therefore according to conditions for
  selection of sample group given in step above (
  50 to 150 criteria), unit sizes above 330 MW up
  to 1000 MW are to be identified for the sample
  group.
• Therefore all units between 330MW to 1000MW size
  units were selected in the sample group.(coal
  based 500MW units)

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The sample group of plants satisfying the above
mentioned criteria were 14 units of 500MW.
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Top 15 performer power plants
Top performers
Two plants are selected as they are generating
more than 15 of the total generation of the
plants selected in sample group
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The emission factor accordingly has been
calculated for option 2 as 0.941 tCO2/MWh. As
per the methodology minimum of option 1 and
option 2 is to be taken as baseline emission
factor i.e Minimum ( 0.987, 0.941)
Baseline emission factor 0.941 tCO2/MWh for the
year 2007-08
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TYPICAL STEAM PARAMETERS OF SUPERCRITICAL UNIT
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Reduction of CO2 emissions with supercritical
power plants

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• Planning of Supercritical coal power plants
• 11th Plan ( 2007-12)
• 7 No of 660MW
• 1 No of 800MW
• 12th Plan ( 2012 -17)
• 25 No of 660MW
• 33 No of 800MW

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THANK YOU