Understanding CDM Methodologies - SuSanA

• Option 3: The emission factor of the technology (and fuel) identified as the
most plausible baseline scenario, calculated as follows:
(tCO 2
/MWh) baseline
= (tCO 2
/GJ) baseline
/ η baseline
X 3.6 (GJ/
MWh)
Baseline Emissions
per Unit Power
Fuel Emission
Coefficient
Energy
Efficiency
of the
Technology
(in Fraction)
Conversion
Factor from
MWh to GJ
Note: The fuel emission coefficient should be based on national average fuel data,
if available. Otherwise, the IPCC default values can be used.
Choice repeated
at each Update of
Crediting Period
Project Emissions:
Fuel burned by
Project
Leakage: Lifecycle
Emissions of Fuel
used
The baseline emission factor determination will be made once at the
validation stage based on an ex-ante assessment for the first crediting
period and once again at the start of each subsequent crediting period (if
applicable). If either option 1 (BM) or option 2 (CM) are selected, they will be
estimated ex-post, as described in ACM0002.
Project Emissions
The project activity is on-site combustion of fossil fuel (mainly natural gas)
to generation power. Therefore, the project emissions are calculated as the
product of the amount of fossil fuel consumption and the CO 2
emissions
coefficient of the corresponding fossil fuel.
Leakage
Project participants shall consider the following sources of leakage when
applying the methodology:
• “Fugitive CH 4
emissions associated with fuel extraction, processing,
liquefaction, transportation, re-gasification and distribution of natural
gas used in the project plant” minus “fugitive CH 4
emissions from fossil
fuels (e.g. coal or oil type) 252 used in the grid in the absence of the project
activity”; and
• In the case LNG is used in the project plant: CO 2
emissions from fuel
combustion/ power consumption associated with the liquefaction,
transportation, re-gasification and compression into a natural gas
transmission or distribution system.
Emissions factors used should be derived from reliable and accurate national
data; if those are not available, default values for different regions can be
used. Where total net leakage effects are negative, project participants
should assume the leakage as zero.
252
The upstream fugitive CH4 emissions of coal power generation depend on the coal source (i.e. underground
or surface mines). In case of oil power generation, the upstream fugitive CH4 emissions should include oil
production, transport, refining, and storage.
61