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Appendix 1: Emission factors for stationary energy

Table 1 - Importing Coal  
Emissions Source   Emissions Factor tCO2-e/TJ Total Default Emissions Factor
  Oxidation Factor CO2
(GWP=1)
CH4
(GWP=21)
N2O
(GWP=310)
tCO2-e/TJ tCO2-e/TJ
Lignite 0.980 96.09 0.0147 0.465 94.65 95.03
Sub-bituminous 0.980 91.99 0.0147 0.465 90.63 90.78
Bituminous 0.980 89.13 0.0147 0.465 87.83 88.28

Table 2 - Mining Coal
Emissions Source   Emissions Factor tCO2-e/TJ Total Default Emissions Factor
  Oxidation Factor CO2
(GWP=1)
CH4
(GWP=21)
N2O
(GWP=310)
tCO2-e/TJ tCO2-e/TJ
Lignite – Waimumu and Roxburgh 0.980 93.11 0.0147 0.465 91.73 91.73
Lignite 0.980 96.09 0.0147 0.465 94.65 95.03
Sub-bituminous 0.980 91.99 0.0147 0.465 90.63 90.78
 Bituminous 0.980 89.13 0.0147 0.465 87.83 88.28

This table shows the mean of the assumed distribution for different classes of coal and the DEF. 
See Appendix 4 for more details on how the DEF has been set.

Table 3A – Fugitive Coal Seam Gas
Emission Source Category Emissions Source  Emissions Factor tCO2-e/t coal Total
    Oxidation Factor
(CO2 only)
CO2
(GWP=1)
CH4
(GWP=21)
N2O
(GWP=310)
tCO2-e/t
Fugitive emissions Surface mining (including post-mining) NA - 0.000837 - 0.018
Underground bituminous mining (including post-mining) NA - 0.018350 - 0.385
  Underground sub-bituminous mining (including post-mining) NA - 0.013700 - 0.288

Table 3B – Combusting Coal Seam Gas
Emission Source Category Emissions Source  Emissions Factor tCO2-e/t gas Total
    Combustion Efficiency CO2
(GWP=1)
CH4
(GWP=21)
N2O
(GWP=310)
tCO2-e/t
Fugitive emissions Difference between flaring and venting (ie, the reduction in GWP) NA NA NA NA 17.885

Table 4 – Importing Natural Gas
Emission Source Category Emissions Source  Emissions Factor tCO2-e/GJ Total
    Oxidation Factor
(CO2 only)
CO2
(GWP=1)
CH4
(GWP=21)
N2O
(GWP=310)
tCO2-e/GJ
Natural gas  Commercial propane 0.995 0.05960000 0.00002195 0.00017670 0.05950065
Commercial butane 0.995 0.06140000 0.00002195 0.00017670 0.06129165
LPG (P60:B40) 0.995 0.06040000 0.00002195 0.00017670 0.06029665

Table 5 – Mining or Purchasing Natural Gas
Emission Source Category Emissions Source  Emissions Factor tCO2-e/TJ Total
    Oxidation Factor
(CO2 only)
CO2
(GWP=1)
CH4
(GWP=21)
N2O
(GWP=310)
tCO2-e/TJ
Natural gas National average (specification gas) 0.995 53.29 0.0013 0.0001 53.35

Table 6A – Using Geothermal Steam
Emission Source Category Emissions Source  Emissions Factor tCO2-e/t steam Total
tCO2-e/t steam
    Oxidation Factor
(CO2 only)
CO2
(GWP=1)
CH4
(GWP=21)
 
Geothermal  Wairakei A, B and Binary Power Plants NA NA NA - 0.00547*
Poihipi Road Geothermal Plant NA NA NA - 0.00432*
Ohaaki Power Plant NA NA NA - 0.04187*
Mokai I & II Power Plants NA NA NA - 0.0069
Mokai Greenhouse NA NA NA - 0.00
Rotokawa I Power Plant NA NA NA - 0.0214
Kawerau Industrial Use NA NA NA - 0.1024*
Kawerau II Power Plant NA NA NA - 0.0275
Kawerau KA24 Power Plant NA NA NA - 0.1024*
Ngawha I & II Power Plants NA NA NA - 0.212
Any other plant or process using geothermal steam to produce electricity or industrial heat NA NA NA - 0.212
* = field data in the absence of plant-specific data

Table 6B – Using Geothermal Fluid
Emission Source Category Emissions Source  Emissions Factor tCO2-e/t steam Total
tCO2-e/t 2-phase fluid
    Oxidation Factor
(CO2 only)
CO2
(GWP=1)
CH4
(GWP=21)
 
Geothermal Tenon industrial use of Tauhara field NA NA NA - 0.00547*
Any other plant or process using geothermal fluid to produce electricity or industrial heat other than production of geothermal steam NA NA NA - 0.00547
* = field data in the absence of plant-specific data

Table 7 – Combustion of Used Oil, Waste Oil, Used Tyres or Waste

Part A - Used Oil and Waste Oil
Emission Source Category Emissions Source  Emissions Factor tCO2-e/TJ waste Total
    Oxidation Factor
(CO2 only)
CO2
(GWP=1)
CH4
(GWP=21)
N2O
(GWP=310)
tCO2-e/TJ
Used and waste oil   1.000 69.60 0.63 1.24 71.47
Part B – Used Tyres
Emission Source Category Emissions Source  Emissions Factor tCO2-e/TJ waste Total
    Oxidation Factor
(CO2 only)
CO2
(GWP=1)
CH4
(GWP=21)
N2O
(GWP=310)
tCO2-e/TJ
Used tyres   1.000 136.00 0.63 1.24 137.87
 
Part C – Waste
Emission Source Category Emissions Source  Emissions Factor tCO2-e/TJ waste Total
    Oxidation Factor
(CO2 only)
CO2
(GWP=1)
CH4
(GWP=21)
N2O
(GWP=310)
tCO2-e/TJ
Waste Municipal waste - biomass fraction 1.000 0.00 0.63 1.24 1.87
Municipal waste - non-biomass fraction 1.000 115.00 0.63 1.24 116.87
Solid biofuels - wood and wood waste 1.000 0.00 0.63 1.24 1.87
Solid biofuels - sulphate lyes 1.000 0.00 0.63 0.62 1.25
Solid biofuels - charcoal 1.000 0.00 4.20 1.24 5.44
Solid biofuels - other (not wood or wood waste or sulphate lyes or charcoal) 1.000 0.00 0.63 1.24 1.87