Corporate Ecological Footprint: New Conversion Factors
Table 2
Method used to convert electricity consumption to emission
and hectares based on three different data sources and two different
absorption factors.
(1) Spread sheet for CEF version 1
(Doménech, 2006)
(2) Direct conversion
with LCA (*)
(Álvarez et al. 2008)
(3) GHG inventories 1990–2004
Electricity obtained from a coal fired power station
Assumed electric consumption
as an example
1 GWh (12,000 Gj)
1 GWh (12,000 Gj)
1 GWh (12,000 Gj)
Emission factor
0.026 tC/Gj (1)
1006 /GWh (1)
0.0973 /Gj (2)
carbon emitted
312
274.4
318.4
emitted
1,144.0
1006
1,167.6
Conversion to hectares
(5.20 /ha/year) &
“energy productivity”
220 ha/year
193.5 ha/year
224.5 ha/year
—
54.6 Gj/ha/year
53.4 Gj/ha/year
Conversion
to hectares
(3.66 /ha/year) &
“energy
productivity”
312.6 ha/year
274.9 ha/year
319.0 ha/year
—
38.5 Gj/ha/year
37.6 Gj/ha/year
Electricity
obtained from a power station fired by liquid fossil fuels
Electricity
consumption
1 GWh (12,000 Gj)
1 GWh (12,000 Gj)
1 GWh (12,000 Gj)
Emission factor
0.020 tC/Gj (3)
742 /GWh (4)
0.076 /Gj (4)
carbon emitted
240
202.4
248.7
emitted
880
742
912
Conversion
to hectares
(5.20 /ha/year) &
“energy productivity”
169.2 ha/year
142.7 ha/year
175.4 ha/year
—
71 Gj/ha/year
68.6 Gj/ha/year
Conversion
to hectares
(3.66 /ha/year) &
“energy
productivity”
240.4 ha/year
202.7 ha/year
249.7 ha/year
—
50 Gj/ha/year
48.3 Gj/ha/year
Electricity
obtained from a gas fired power station
Electricity
consumption
1 GWh (12,000 Gj)
1 GWh (12,000 Gj)
1 GWh (12,000 Gj)
Emission factor
0.0153 tC/Gj
466 /GWh
0.056 /Gj
carbon emitted
183.6
127.1
183.3
emitted
673.2
466
672
Conversion
to hectares
(5.20 /ha/year) &
“energy productivity”
129.5 ha/year
89.6 ha/year
129.2 ha/year
—
92.8 Gj/ha/year
92.8 Gj/ha/year
Conversion
to hectares
(3.66 /ha/year) &
“energy productivity”
183.9 ha/year
127.3 ha/year
183.6 ha/year
—
65.4 Gj/ha/year
65.4 Gj/ha/year
(*)
Life cycle assessment.(1)
Referred to coal in general (includes several times); (2) anthracite; (3) fuel oil
and gas-oil; (4)
fuel oil.Source:
own preparation.
