Calculation of Emissions & Trees Required for Permanent Sequestraion
23% of Australia’s Greenhouse Gas emissions are from transport
|
Car |
|
|
|
|
|
Type of Fuel |
Petrol |
LPG |
Diesel |
|
|
Fuel Efficiency |
12 |
17.4 |
11.2 |
Litre/100km |
|
Average Travel |
16 |
16 |
16 |
1000km/year |
|
Fuel Conversion Factor |
2257.2 |
1526.58 |
2690.42 |
|
|
Emissions (based of fuel consumption per year) |
4.33 |
4.25 |
4.82 |
Tonnes CO2 per year |
|
Model Trees per Car per Year |
6.5 |
6.4 |
7.2 |
Trees |
|
Bio-diversity Trees per Car per Year |
16 |
16 |
18 |
Trees |
|
Trucks & Buses |
Rigid |
Artic. |
Bus |
Unit |
|
Fuel Efficiency |
27.2 |
50.6 |
28.9 |
Litre/100km |
|
Average Travel |
20.3 |
90 |
54 |
1000km/year |
|
Diesel Conversion Factor |
2690.42 |
2690.42 |
2690.42 |
|
|
Emissions (based on fuel consumption per year) |
15 |
123 |
26 |
Tonnes CO2 per year |
|
Model Trees per Truck per Year |
22 |
183 |
38 |
Trees |
|
Bio-diversity Trees per Rigid Truck per Year |
56 |
460 |
97 |
Trees |
Sources: BTCE estimates, ABS statistics Centre for Forest & Tree Technology
Notes
Tree absorption is based on steady state assumption = 183 kg carbon/tree ie. 219,000kg carbon/1200 trees.
Converting to CO2 (molecular weight of CO2 is 44, molecular weight of carbon is 12, so to convert to carbon multiply weight of CO2 by 12/44), so 183 kg carbon/tree is equivalent to 669 kg CO2/tree.
Fuel consumption per year = average fuel consumption per 100*km travelled.
Diesel conversion factor 38.6 megajoules/litre * 69.7 gram CO2/megajoule = 2690.42
Petrol conversion factor 34.2 megajoules/litre * 66 grams CO2/megajoule = 2257.2
LPG conversion factor 25.7 megajoules/litre * 59.4 grams CO2/megajoule = 1526.58 B2a1_a1
CO2 EMISSION FACTORS & LIQUID FUEL ENERGY DENSITIES BY FUEL TYPE
|
Fuel Type |
k |
Proportion of |
CO2 Emissions |
Energy Density |
|
|
|
Fuel
Oxidised |
Factor
Fk |
Dk |
|
Automotive Gasoline |
1 |
0.99 |
66.0 |
34.2 |
|
Automotive Diesel Oil |
2 |
0.99 |
69.7 |
38.6 |
|
Liquefied Petroleum Gas |
3 |
0.99 |
59.4 |
24.7 |
|
Aviation Gasoline |
4 |
0.99 |
68.0 |
33.1 |
|
Aviation Turbine Fuel |
5 |
0.99 |
69.7 |
36.8 |
|
Industrial Diesel Fuel |
6 |
0.99 |
69.7 |
39.6 |
|
Fuel Oil |
7 |
0.99 |
73.6 |
40.8 |
|
Natural Gas |
8 |
1.00 |
54.4 |
N/A |
|
Black Coal |
9 |
0.99 |
90.0 |
N/A |
The volume of air depleted of O2 by direct (end-use) combustion 9.5 m3/L petrol +/- 0.2
The true impact of fuel use, over the full fuel cycle (ie including extraction, refining and transport of the fuel to the end-user). A factor of 1.114 is used by the Bureau of Transport Economics to multiply end-use energy by to obtain full fuel cycle energy. The same factor can be used in this case.
The volume of air depleted of O2 on a full fuel cycle basis » 1.114 x 9.5 = 10.5 m3 / L gasoline
http://www.greenfleet.com.au/transport/technical.asp
B2a1_a2