7/30/2019 Praveen Gupta 305[1]

http://slidepdf.com/reader/full/praveen-gupta-3051 1/19

Baseline Emission Factor 

for 

coal based supercritical

power plants

Praveen GuptaDeputy Director 

Central Electricity Authority

29th

April,2009

7/30/2019 Praveen Gupta 305[1]

http://slidepdf.com/reader/full/praveen-gupta-3051 2/19

Methodology

• CDM Approved Consolidated baseline and

monitoring Methodology ACM0013

• Methodology is applicable to

 – Only new electricity generation plants using moreefficient 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

7/30/2019 Praveen Gupta 305[1]

http://slidepdf.com/reader/full/praveen-gupta-3051 3/19

 Applicability of Methodology 

 Applicable to new coal basedgenerating units with supercritical

parameters (More Efficient Technology)

Supercritical technology efficiency is about 2%

higher than conventional technology ( Sub Critical

technology)

7/30/2019 Praveen Gupta 305[1]

http://slidepdf.com/reader/full/praveen-gupta-3051 4/19

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)

7/30/2019 Praveen Gupta 305[1]

http://slidepdf.com/reader/full/praveen-gupta-3051 5/19

Baseline Emissions

 As per methodology ,only CO2 

emissions from fossil fuel combustion

in the project are to be considered.

7/30/2019 Praveen Gupta 305[1]

http://slidepdf.com/reader/full/praveen-gupta-3051 6/19

Baseline Emission Factor (EF) is the lowest

value between following two options:

Emission factor of the technology and fuel typethat 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)

7/30/2019 Praveen Gupta 305[1]

http://slidepdf.com/reader/full/praveen-gupta-3051 7/19

Emission factor (option1 )• The emission factor of the technology and

fuel identified as the most likely baselinescenario is calculated as follows: 

EF = MIN(EF BLF , EF PJF, ) * 3.6 GJ/MWh  -------------------------------------------

ηBLEFy Baseline emission factor in year y (tCO2/MWh)EF BLF baseline emission factor of the baseline fossil fuel type that has 

been identified as the most likely baseline scenario (tCO2 / Mass or volume unit)

EF PJF - Average CO2 emission factor of the fossil fuel type used in the project plant in year y (tCO2 / Mass or volume unit)

ηBL is the Energy efficiency of the power generation technology that has been identified as the most likely baseline scenario 

7/30/2019 Praveen Gupta 305[1]

http://slidepdf.com/reader/full/praveen-gupta-3051 8/19

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 theproposed project activity is also coal 

7/30/2019 Praveen Gupta 305[1]

http://slidepdf.com/reader/full/praveen-gupta-3051 9/19

Emission factors (option1 )has been calculated with

following scenario :

Case 1 : Baseline Coal  – Sub Bituminous coalProject Coal  – Sub Bituminous coal (Indian

Coal) 

Case 2 : Baseline Coal  – Sub Bituminous coal

Project Coal - Other Bituminous coal (Importedcoal)

(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

7/30/2019 Praveen Gupta 305[1]

http://slidepdf.com/reader/full/praveen-gupta-3051 10/19

Option 2: Emission factor of top 15%

performer power plants

• Identify sample group of power plantsbased 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 CDMproject.

 – Sample group must comprises of at least 10plants.

7/30/2019 Praveen Gupta 305[1]

http://slidepdf.com/reader/full/praveen-gupta-3051 11/19

• Calculate the operational efficiency of 

each power plant identified in the samplegroup

• Select top 15% top performers plants.

Calculate emission factor from theseplants.

 – Top 15% performer group should be enlarged

until the selection represent at least 15% of 

the total generation of sample group plants.

7/30/2019 Praveen Gupta 305[1]

http://slidepdf.com/reader/full/praveen-gupta-3051 12/19

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 sizesabove 330 MW up to 1000 MW are to be

identified for the sample group.

•Therefore all units between 330MW to1000MW size units were selected in the

sample group.(coal based 500MW units)

7/30/2019 Praveen Gupta 305[1]

http://slidepdf.com/reader/full/praveen-gupta-3051 13/19

The sample group of plants satisfying the above

mentioned criteria were 14 units of 500MW.:

SNo  NAME  UNIT_NO 

1  TALCHER STPS  3 

2  TALCHER STPS  4 

3  TALCHER STPS  5 

4  TALCHER STPS  6 

5  R_GUNDEM STPS  7 

6  VINDH_CHAL STPS  10 

7  VINDH_CHAL STPS  9 

8  RIHAND  3 

9  RIHAND  4 10  KAHALGAON  6 

11  BELLARY TPS  1 

12  SANJAY GANDHI  5 

13  SIPAT STPS  1 

14  KAHALGAON  5 

7/30/2019 Praveen Gupta 305[1]

http://slidepdf.com/reader/full/praveen-gupta-3051 14/19

Top 15% performer power plants 

SNo  NAME  UNIT_NO 

1  TALCHER STPS, 500MW  3 

2  TALCHER STPS , 500MW 4 

3  TALCHER STPS , 500MW 5 

4  TALCHER STPS , 500MW 6 

5  R_GUNDEM STPS , 500MW 7 

6  VINDH_CHAL STPS , 500MW 10 

7  VINDH_CHAL STPS , 500MW 9 

8  RIHAND , 500MW 3 

9  RIHAND , 500MW 4 

10  KAHALGAON , 500MW 6 

11  BELLARY TPS , 500MW 1 

12  SANJAY GANDHI , 500MW 5 

13  SIPAT STPS , 500MW 1 

14  KAHALGAON , 500MW 5 

Two plants are selected as they are generating more than 15% of thetotal generation of the plants selected in sample group

Top

performers

7/30/2019 Praveen Gupta 305[1]

http://slidepdf.com/reader/full/praveen-gupta-3051 15/19

The emission factor accordingly has beencalculated for option 2 as 0.941 tCO2/MWh.

As per the methodology minimum of option 1 andoption 2 is to be taken as baseline emission

factori.e Minimum ( 0.987, 0.941)

Baseline emission factor 0.941tCO2/MWh for the year 2007-08 

7/30/2019 Praveen Gupta 305[1]

http://slidepdf.com/reader/full/praveen-gupta-3051 16/19

TYPICAL STEAM PARAMETERS OF SUPERCRITICAL UNIT

Parameter 660MW 800MW

Main Steam

Pressure Kg/cm2

247 247

Main SteamTemperature oC

535/565 565

Reheat

Temperatureo

C

565/593 593

Gross Efficiency

(GCV )

39.6 % 40.25 %

7/30/2019 Praveen Gupta 305[1]

http://slidepdf.com/reader/full/praveen-gupta-3051 17/19

Reduction of CO2 emissions with supercritical

power plants Capacity MW  660MW

Gross Heat Rate kcal/kwh  2138 (2285 Net)

PLF %  80%

Generation Million Units (MU)  4625

Net Generation MU @6.5%

 APC4324

CO2 emission in kg/kwh (Net)  0.941 0.867( Project Emission

factor)

Reduction in tonnes CO2 Emission/annum

4324 ( 0.941- 0.867)

= 319976

CDM Revenue@ 1CER = Euro 81 Euro = Rs 65

24200 * Euro 8 =

2559808 Euros

= Rs 16.6 crores

7/30/2019 Praveen Gupta 305[1]

http://slidepdf.com/reader/full/praveen-gupta-3051 18/19

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

7/30/2019 Praveen Gupta 305[1]

http://slidepdf.com/reader/full/praveen-gupta-3051 19/19