Greenhouse gas conversion factors for company reporting

2012 Guidelines to Defra / DECC's GHG Conversion Factors for Company Reporting
Annex 3 - Converting from purchased electricity, heat and steam use to carbon dioxide equivalent emissions
Table 3b Scope 3
Scope 3 All Scopes Scope 3 All Scopes
Electricity emission factors from 1990 to 2010
per kWh (electricity LOSSES): CO 2 CH 4 N 2O Total GHG
Grid Rolling
Average 1 : CO 2 CH 4 N 2O
Total Direct
GHG
Total Indirect
GHG 3 Grand
Total GHG CO 2 CH 4 N 2O
Total Direct
GHG
Total Indirect
GHG
Grand Total
GHG % Transmission % Net
UK Grid Electricity Year kg CO 2 kg CO 2e kg CO 2e kg CO 2e per Amount USED kg CO 2 kg CO 2e kg CO 2e kg CO 2e per kg CO 2e per kg CO 2e per Total kg CO 2 Total kg Total kg Total kg Total kg CO 2e Total kg CO 2e and Distribution Imports of
per kWh per kWh per kWh kWh
per year, kWh per kWh per kWh per kWh kWh
kWh
kWh
CO 2e CO 2e CO 2e
Losses Electricity
1990 0.06185 0.00002 0.00051 0.06237 0.06185 0.00002 0.00051 0.06237 0.00835 0.07072 8.1% 3.8%
1991 0.06113 0.00002 0.00050 0.06165 0.06149 0.00002 0.00051 0.06201 0.00839 0.07040 8.3% 5.2%
1992 0.05227 0.00001 0.00043 0.05271 0.05842 0.00002 0.00048 0.05891 0.00747 0.06638 7.5% 5.3%
1993 0.04431 0.00001 0.00034 0.04466 0.05489 0.00001 0.00044 0.05535 0.00683 0.06217 7.2% 5.2%
1994 0.05831 0.00002 0.00044 0.05877 0.05557 0.00002 0.00044 0.05603 0.00884 0.06487 9.6% 5.2%
1995 0.05229 0.00002 0.00038 0.05269 0.05366 0.00002 0.00042 0.05410 0.00790 0.06200 9.1% 5.0%
1996 0.04597 0.00002 0.00031 0.04630 0.05063 0.00002 0.00038 0.05103 0.00688 0.05791 8.4% 4.8%
1997 0.03925 0.00001 0.00025 0.03951 0.04803 0.00002 0.00034 0.04838 0.00594 0.05432 7.8% 4.8%
1998 0.04324 0.00002 0.00027 0.04353 0.04781 0.00002 0.00033 0.04816 0.00608 0.05424 8.4% 3.5%
1999 0.03968 0.00002 0.00023 0.03993 0.04408 0.00002 0.00029 0.04439 0.00563 0.05002 8.3% 3.9%
2000 0.04273 0.00002 0.00026 0.04300 0.04217 0.00002 0.00026 0.04245 0.00549 0.04794 8.4% 3.8%
2001 0.04533 0.00002 0.00028 0.04563 0.04205 0.00002 0.00026 0.04232 0.00549 0.04781 8.6% 2.8%
2002 0.04244 0.00002 0.00026 0.04271 0.04268 0.00002 0.00026 0.04296 0.00527 0.04824 8.3% 2.2%
2003 0.04559 0.00002 0.00028 0.04589 0.04315 0.00002 0.00026 0.04343 0.00544 0.04888 8.5% 0.6%
2004 0.04654 0.00002 0.00028 0.04684 0.04452 0.00002 0.00027 0.04481 0.00572 0.05053 8.7% 2.0%
2005 0.03751 0.00002 0.00024 0.03776 0.04348 0.00002 0.00027 0.04377 0.00479 0.04855 7.2% 2.2%
2006 0.03947 0.00002 0.00026 0.03975 0.04231 0.00002 0.00026 0.04259 0.00483 0.04742 7.2% 2.0%
2007 0.03799 0.00002 0.00024 0.03825 0.04142 0.00002 0.00026 0.04170 0.00479 0.04649 7.1% 1.4%
2008 0.03837 0.00002 0.00023 0.03861 0.03997 0.00002 0.00025 0.04024 0.00492 0.04516 7.3% 2.9%
2009 0.03684 0.00002 0.00022 0.03708 0.03804 0.00002 0.00024 0.03829 0.00501 0.04330 7.6% 0.8%
2010 0.03619 0.00002 0.00021 0.03643 0.03777 0.00002 0.00023 0.03802 0.00477 0.04280 7.4% 0.7%
Other electricity factor
Renewables 2 0 0 0 0 0 0 0 0 0 0
Total 0 0 0 0 0 0
Table 3c Scope 3 All Scopes Scope 2, 3 3
Scope 3 All Scopes
Electricity emission factors from 1990 to 2010
per kWh (electricity CONSUMED): CO 2 CH 4 N 2O Total GHG
Grid Rolling
Average 1 : CO 2 CH 4 N 2O
Total Direct
GHG
Total Indirect
GHG 3 Grand
Total GHG CO 2 CH 4 N 2O
Total Direct
GHG
Total Indirect
GHG
Grand Total
GHG % Transmission % Net
UK Grid Electricity Year kg CO 2 kg CO 2e kg CO 2e kg CO 2e per Amount USED kg CO 2 kg CO 2e kg CO 2e kg CO 2e per kg CO 2e per kg CO 2e per Total kg CO 2 Total kg Total kg Total kg Total kg CO 2e Total kg CO 2e and Distribution Imports of
per kWh per kWh per kWh kWh
per year, kWh per kWh per kWh per kWh kWh
kWh
kWh
CO 2e CO 2e CO 2e
Losses Electricity
1990 0.76578 0.00021 0.00628 0.77226 0.76578 0.00021 0.00628 0.77226 0.11169 0.88395 8.1% 3.8%
1991 0.73916 0.00019 0.00609 0.74544 0.75247 0.00020 0.00618 0.75885 0.10983 0.86868 8.3% 5.2%
1992 0.69262 0.00018 0.00570 0.69850 0.73252 0.00019 0.00602 0.73873 0.10643 0.84516 7.5% 5.3%
1993 0.61810 0.00018 0.00473 0.62302 0.70391 0.00019 0.00570 0.70980 0.10211 0.81191 7.2% 5.2%
1994 0.60912 0.00020 0.00456 0.61387 0.68496 0.00019 0.00547 0.69062 0.10123 0.79185 9.6% 5.2%
1995 0.57639 0.00020 0.00422 0.58080 0.64708 0.00019 0.00506 0.65233 0.09501 0.74734 9.1% 5.0%
1996 0.54702 0.00019 0.00372 0.55094 0.60865 0.00019 0.00459 0.61343 0.08880 0.70223 8.4% 4.8%
1997 0.50361 0.00018 0.00319 0.50698 0.57085 0.00019 0.00408 0.57512 0.08210 0.65722 7.8% 4.8%
1998 0.51501 0.00020 0.00326 0.51846 0.55023 0.00019 0.00379 0.55421 0.07854 0.63275 8.4% 3.5%
1999 0.48096 0.00020 0.00278 0.48394 0.52460 0.00019 0.00343 0.52822 0.07381 0.60203 8.3% 3.9%
2000 0.50958 0.00021 0.00307 0.51286 0.51124 0.00020 0.00320 0.51463 0.07097 0.58560 8.4% 3.8%
2001 0.52949 0.00022 0.00329 0.53300 0.50773 0.00020 0.00312 0.51105 0.06960 0.58065 8.6% 2.8%
2002 0.51406 0.00022 0.00309 0.51737 0.50982 0.00021 0.00310 0.51313 0.06917 0.58230 8.3% 2.2%
2003 0.53828 0.00022 0.00336 0.54186 0.51448 0.00021 0.00312 0.51781 0.06973 0.58754 8.5% 0.6%
2004 0.53430 0.00022 0.00323 0.53776 0.52514 0.00022 0.00321 0.52857 0.07139 0.59996 8.7% 2.0%
2005 0.51766 0.00023 0.00327 0.52117 0.52676 0.00022 0.00325 0.53023 0.07094 0.60117 7.2% 2.2%
2006 0.54707 0.00024 0.00361 0.55092 0.53028 0.00023 0.00331 0.53382 0.07180 0.60562 7.2% 2.0%
2007 0.53794 0.00025 0.00336 0.54154 0.53505 0.00023 0.00337 0.53865 0.07255 0.61120 7.1% 1.4%
2008 0.52493 0.00026 0.00314 0.52833 0.53238 0.00024 0.00332 0.53594 0.07221 0.60815 7.3% 2.9%
2009 0.48403 0.00028 0.00284 0.48714 0.52233 0.00025 0.00324 0.52582 0.07086 0.59668 7.6% 0.8%
2010 0.49072 0.00028 0.00289 0.49390 0.51694 0.00026 0.00317 0.52037 0.06945 0.58982 7.4% 0.7%
Other electricity factor
Renewables 2 0 0 0 0 0 0 0 0 0 0
Total 0 0 0 0 0 0
Scope 2, 3 4 Scope 3
Sources
Notes
Based on UK Greenhouse Gas Inventory for 2010 (AEA, 2012) (available at http://naei.defra.gov.uk) according to the amount of CO 2, CH 4 and N 2O emitted from major
power stations per unit of electricity consumed from the DECC's Digest of UK Energy Statistics 2011, Table 5.6, available at:
http://www.decc.gov.uk/en/content/cms/statistics/publications/dukes/dukes.aspx
Emission Factor (Electricity CONSUMED) = Emission Factor (Electricity GENERATED) + Emission Factor (Electricity LOSSES)
1 The electricity conversion factors given represent the average carbon dioxide emission from the UK national grid (plus net imports) per kWh of electricity generated
(supplied to grid) in Table 3a, and in Table 3c for kWh electricity used at the point of final consumption (i.e. transmission and distribution losses are included, from Table
3b). These factors include only direct carbon dioxide (CO 2), methane (CH 4) and nitrous oxide (N 2O) emissions at UK power stations (similarly for imported electricity
from other countries) and do not include emissions resulting from production and delivery of fuel to these power stations (i.e. from gas rigs, refineries and collieries,
etc.).
This factor changes from year to year, as the fuel mix consumed in UK power stations changes (as well as the % of net electricity imports via interconnectors). Because
these annual changes can be large (the factor depends very heavily on the relative prices of coal and natural gas as well as fluctuations in peak demand and
renewables), and to assist companies with year to year comparability, the factor presented is the grid rolling average of the grid conversion factor over the previous 5
years. This factor is updated annually.
2 Organisations should only use the 'Renewables' factor for reporting emissions from electricity generated from owned or controlled renewable sources backed by
Renewable Energy Guarantee of Origin (REGOs) certificates. Please refer to Annex G of the Defra Guidance for further guidance on reporting renewable energy:
http://www.defra.gov.uk/environment/economy/business-efficiency/reporting/
3 These indirect GHG emissions are due to upstream emissions from production and delivery of fuel to power stations.
4 Includes both Direct GHG emissions per kWh (electricity GENERATED), which are counted as Scope 2, as well as Direct GHG emissions per kWh (electricity LOSSES),
which are counted as Scope 3. This does not include Indirect GHG emissions, which are different and accounted separately, but also reported in Scope 3.
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