Part 4—Net abatement amounts
Division 1—Operation of this Part
18 Operation of this Part
For paragraph 106(1)(c) of the Act, this Part specifies methods for working out the carbon dioxide equivalent net abatement amount for a reporting period for a coal mine waste gas project that is an eligible offsets project.
19 Overview of gases accounted for in abatement calculations
The following table provides an overview of the greenhouse gases and emissions sources that are relevant to working out the carbon dioxide equivalent net abatement amount for a coal mine waste gas project.
| Greenhouse gases and emissions sources |
| Item | Relevant emissions calculation | Emissions source | Greenhouse gas |
| 1 | Project abatement | Methane conversion | Methane (CH4) |
| 2 | Project emissions | Fuel consumption | Carbon dioxide (CO2) Methane (CH4) Nitrous oxide (N2O) |
| 3 | Project emissions | Methane conversion | Carbon dioxide (CO2) Methane (CH4) Nitrous oxide (N2O) |
| 4 | Project emissions | Unburned methane | Methane (CH4) |
Division 2—New flaring or flameless oxidation project method
20 Summary
The carbon dioxide equivalent net abatement for a new flaring or flameless oxidation project is the abatement achieved from installing and operating flaring or flameless oxidation devices less:
(a) the emissions from operating the installed flaring or flameless oxidation devices; and
(b) ancillary emissions of the project; and
(c) any historic abatement.
21 Net abatement amount
(1) The carbon dioxide equivalent net abatement amount for a new flaring or flameless oxidation project for the reporting period, in tonnes CO2‑e, is worked out:
(a) if there has been no historic abatement—using subsection (2); or
(b) if there has been historic abatement that is not material abatement—using subsection (3).
No historic abatement
(2) The carbon dioxide equivalent net abatement amount for the new flaring or flameless oxidation project for the reporting period, in tonnes CO2‑e, is worked out using the formula (equation 1):
where:
AN means the carbon dioxide equivalent net abatement amount for the new flaring or flameless oxidation project for the reporting period, in tonnes CO2‑e.
AP means the project emissions abated for the reporting period, in tonnes CO2‑e, worked out using equation 3.
Historic abatement that is not material abatement
(3) The carbon dioxide equivalent net abatement amount for the new flaring or flameless oxidation project for the reporting period, in tonnes CO2‑e, is worked out using the formula (equation 2):
where:
AN means the carbon dioxide equivalent net abatement amount for the new flaring or flameless oxidation project for the reporting period, in tonnes CO2‑e.
AP means the project emissions abated for the reporting period, in tonnes CO2‑e, worked out using equation 3.
AH means the historic abatement from the conversion of the methane component of coal mine waste gas from the mine, in tonnes CO2‑e, worked out using equation 35.
T means the total number of days in the reporting period.
(4) The project emissions abated for the reporting period, in tonnes CO2‑e, is worked out using the formula (equation 3):
where:
AP means the project emissions abated for the reporting period, in tonnes CO2‑e.
MCom means the volume of the methane component of coal mine waste gas converted by the project in the reporting period, in tonnes CO2‑e, worked out using equation 4.
EMD means the emissions from the methane component of coal mine waste gas converted by the project in the reporting period, in tonnes CO2‑e, worked out using equation 5.
EAn means the ancillary project emissions for the reporting period, in tonnes CO2‑e, worked out using equation 36.
(5) The volume of the methane component of coal mine waste gas converted by the project in the reporting period, in tonnes CO2‑e, is worked out using the formula (equation 4):
where:
MCom means the volume of the methane component of coal mine waste gas converted by the project in the reporting period, in tonnes CO2‑e.
γ means the factor for converting a quantity of methane from cubic metres to tonnes CO2‑e in section 3.21 of the NGER (Measurement) Determination.
DE means the factor for OFif in section 3.14 of the NGER (Measurement) Determination.
QCH4,h means the volume of the methane component of coal mine waste gas sent to device h as part of the project in the reporting period, in cubic metres, worked out:
(a) using equation 12; or
(b) using an integrated monitoring system.
h means an installed flaring or flameless oxidation device.
(6) The emissions from the methane component of coal mine waste gas converted by the project in the reporting period, in tonnes CO2‑e, is worked out using the formula (equation 5):
where:
EMD means the emissions from the methane component of coal mine waste gas converted by the project in the reporting period, in tonnes CO2‑e.
EMD,h,j means the emissions of gas type j released from the conversion of the methane component of coal mine waste gas by device h as part of the project in the reporting period, in tonnes CO2‑e, worked out using equation 13.
Note: Gas type j is carbon dioxide, methane or nitrous oxide.
h means an installed flaring or flameless oxidation device.
Division 3—Expansion flaring or flameless oxidation project method
22 Summary
The carbon dioxide equivalent net abatement amount for an expansion flaring or flameless oxidation project is the abatement achieved from installing and operating flaring or flameless oxidation devices (subject to a baseline) less:
(a) the emissions from operating the installed flaring or flameless oxidation devices; and
(b) ancillary emissions of the project.
The abatement achievable from existing flaring or flameless oxidation devices and existing electricity production devices is used to determine a baseline for working out the abatement achieved by the project. Only abatement above this baseline is counted as abatement achieved by the project.
23 Net abatement amount
(1) The carbon dioxide equivalent net abatement amount for an expansion flaring or flameless oxidation project for the reporting period, in tonnes CO2‑e, is worked out using the formula (equation 6):
where:
AN means the carbon dioxide equivalent net abatement amount for the expansion flaring or flameless oxidation project for the reporting period, in tonnes CO2‑e.
AP means the project emissions abated for the reporting period, in tonnes CO2‑e, worked out using equation 7.
(2) The project emissions abated for the reporting period, in tonnes CO2‑e, is worked out using the formula (equation 7):
where:
AP means the project emissions abated for the reporting period, in tonnes CO2‑e.
MCom means the volume of the methane component of coal mine waste gas converted by the project in the reporting period, in tonnes CO2‑e, worked out using equation 8.
EMD means the emissions from the methane component of coal mine waste gas converted by the project in the reporting period, in tonnes CO2‑e, worked out using equation 9.
EAn means the ancillary project emissions for the reporting period, in tonnes CO2‑e, worked out under equation 36.
(3) The volume of the methane component of coal mine waste gas converted by the project in the reporting period, in tonnes CO2‑e, is worked out using the formula (equation 8):
where:
MCom means the volume of the methane component of coal mine waste gas converted by the project in the reporting period, in tonnes CO2‑e.
γ means the factor for converting a quantity of methane from cubic metres to tonnes CO2‑e in section 3.21 of the NGER (Measurement) Determination.
DE means the factor for OFif in section 3.14 of the NGER (Measurement) Determination.
XFl,t means the volume of the methane component of coal mine waste gas sent to installed and existing flaring or flameless oxidation devices as part of the project during time interval t less the baseline for the methane component of coal mine waste gas sent to flaring or flameless oxidation devices for the project, in cubic metres, worked out using equation 10.
XGen,t means the volume of the methane component of coal mine waste gas sent to existing electricity production devices as part of the project during time interval t less the baseline for the methane component of coal mine waste gas sent to electricity production devices for the project, in cubic metres, worked out using equation 11.
t means a time interval in the reporting period.
(4) The emissions from the methane component of coal mine waste gas converted by the project in the reporting period, in tonnes CO2‑e, is worked out using the formula (equation 9):
where:
EMD means the emissions from the methane component of coal mine waste gas converted by the project in the reporting period, in tonnes CO2‑e.
EMD,h,j means the emissions of gas type j released from the conversion of the methane component of coal mine waste gas by device h as part of the project in the reporting period, in tonnes CO2‑e, worked out using equation 13.
Note: Gas type j is carbon dioxide, methane or nitrous oxide.
h means an installed flaring or flameless oxidation device.
24 Volume of methane sent to conversion devices
Methane sent to flaring or flameless oxidation devices
(1) The volume of the methane component of coal mine waste gas sent to installed and existing flaring or flameless oxidation devices as part of the project during time interval t less the baseline for the methane component of coal mine waste gas sent to flaring or flameless oxidation devices for the project, in cubic metres, is worked out using the formula (equation 10):
where:
XFl,t means the volume of the methane component of coal mine waste gas sent to installed and existing flaring or flameless oxidation devices as part of the project during time interval t less the baseline for the methane component of coal mine waste gas sent to flaring or flameless oxidation devices for the project, in cubic metres.
QCH4,h,t (or QCH4,m,t) means the volume of the methane component of coal mine waste gas sent to device h (or m) as part of the project during time interval t, in cubic metres, worked out in accordance with the monitoring requirements.
Oh,t (or Om,t) means a binary function which has the value 1 if device h (or m) is operating during time interval t and 0 if it is not.
Note: Operating is defined in section 5.
BCH4,Fl means the baseline for the methane component of coal mine waste gas sent to flaring or flameless oxidation devices for the project during time interval t, in cubic meters, worked out using equation 37.
h means an installed flaring or flameless oxidation device.
m means an existing flaring or flameless oxidation device.
t means a time interval in the reporting period.
Methane sent to electricity production devices
(2) The volume of the methane component of coal mine waste gas sent to existing electricity production devices as part of the project during time interval t less the baseline for the methane component of coal mine waste gas sent to electricity production devices for the project, in cubic metres, is worked out using the formula (equation 11):
where:
XGen,t means the volume of the methane component of coal mine waste gas sent to existing electricity production devices as part of the project during time interval t less the baseline for the methane component of coal mine waste gas sent to electricity production devices for the project, in cubic metres.
QEG,n,t means the quantity of electricity produced by device n during time interval t, in megawatt hours, worked out in accordance with the monitoring requirements.
FMWh→GJ has the value of 3.6.
Note: This is the factor converting energy in megawatt hours to gigajoules.
Effn means the electrical efficiency of device n, which, subject to subsection (4), has:
(a) the value specified by the manufacturer of the device in the technical specifications for the equipment, with reference to Australian Standard AS 4594.1 or equivalent; or
(b) the default value of 0.36.
ECCMWG means the energy content factor of coal mine waste gas, in gigajoules per cubic metre, worked out in accordance with the monitoring requirements.
BCH4,Gen means the baseline for the methane component of coal mine waste gas sent to electricity production devices for the project during time interval t, in cubic meters, worked out using equation 38.
n means an existing electricity production device.
(3) If the value of XGen,t is greater than zero for time interval t, then the value of XGen,t is taken to be zero for the time interval.
(4) The same value of Effn must be used for that parameter for all time intervals in all reporting periods.
Division 4—General calculations for flaring or flameless oxidation methods
25 Volume of methane sent to flaring or flameless oxidation device
The volume of the methane component of coal mine waste gas sent to device h as part of the project in the reporting period, in cubic metres, is worked out using the formula (equation 12):
where:
QCH4,h means the volume of the methane component of coal mine waste gas sent to device h as part of the project in the reporting period, in cubic metres.
QCH4,h,t means the volume of the methane component of coal mine waste gas sent to device h as part of the project during time interval t, in cubic metres, worked out in accordance with the monitoring requirements.
Oh,t means a binary function which has the value 1 if device h is operating during time interval t and 0 if it is not.
Note: Operating is defined in section 5.
h means an installed flaring or flameless oxidation device.
26 Emissions from a flaring or flameless oxidation device
The emissions of gas type j released from the conversion of the methane component of coal mine waste gas by flaring or flameless oxidation device h as part of the project in the reporting period, in tonnes CO2‑e, is worked out using the formula (equation 13):
where:
EMD,h,j means the emissions of gas type j released from the conversion of the methane component of coal mine waste gas by device h as part of the project in the reporting period, in tonnes CO2‑e.
Note: Gas type j is carbon dioxide, methane or nitrous oxide.
QCH4,h means the volume of the methane component of coal mine waste gas sent to device h as part of the project in the reporting period, in cubic metres, worked out:
(a) for a new flaring or flameless oxidation project:
(i) using equation 12; or
(ii) using an integrated monitoring system; or
(b) for an expansion flaring or flameless oxidation project—using equation 12.
ECCMWG means the energy content factor of coal mine waste gas, in gigajoules per cubic metre, worked out in accordance with the monitoring requirements.
EFj means the emission factor for gas type j released from the conversion of the methane component of coal mine waste gas that is captured for conversion, in kilograms of CO2‑e per gigajoule, worked out in accordance with the monitoring requirements.
Note: Gas type j is carbon dioxide, methane or nitrous oxide.
DE means the factor for OFif in section 3.14 of the NGER (Measurement) Determination.
h means an installed flaring or flameless oxidation device.
Division 5—New electricity production project method
27 Summary
The carbon dioxide equivalent net abatement amount for a new electricity production project is the abatement achieved from installing and operating electricity production devices less:
(a) the emissions from operating the installed electricity production devices; and
(b) ancillary emissions of the project; and
(c) certain parameters associated with electricity production; and
(d) any historic abatement.
28 Net abatement amount
(1) The carbon dioxide equivalent net abatement amount for a new electricity production project for the reporting period, in tonnes CO2‑e, is worked out:
(a) if there has been no historic abatement—using subsection (2); or
(b) if there has been historic abatement that is not material abatement—using subsection (3).
No historic abatement
(2) The carbon dioxide equivalent net abatement amount for the new electricity production project for the reporting period, in tonnes CO2‑e, is worked out using the formula (equation 14):
where:
AN means the carbon dioxide equivalent net abatement amount for the new electricity production project, for the reporting period, in tonnes CO2‑e.
AP means the project emissions abated for the reporting period, in tonnes CO2‑e, worked out using equation 16.
AG means the displaced electricity emissions from electricity production in the reporting period, in tonnes CO2‑e, worked out using equation 28.
Historic abatement that is not material abatement
(3) The carbon dioxide equivalent net abatement amount for the new electricity production project for the reporting period, in tonnes CO2‑e, is worked out using the formula (equation 15):
where:
AN means the carbon dioxide equivalent net abatement amount for the new electricity production project for the reporting period, in tonnes CO2‑e.
AP means the project emissions abated for the reporting period, in tonnes CO2‑e, worked out using equation 16.
AG means the displaced electricity emissions from electricity production in the reporting period, in tonnes CO2‑e, worked out using equation 28.
AH means the historic abatement from the conversion of the methane component of coal mine waste gas from the mine, in tonnes CO2‑e, worked out using equation 35.
T means the total number of days in the reporting period.
(4) The project emissions abated for the reporting period, in tonnes CO2‑e, is worked out using the formula (equation 16):
where:
AP means the project emissions abated for the reporting period, in tonnes CO2‑e.
MCom means the volume of the methane component of coal mine waste gas converted by the project in the reporting period, in tonnes CO2‑e, worked out using equation 17.
EMD means the emissions from the methane component of coal mine waste gas converted by the project in the reporting period, in tonnes CO2‑e, worked out using equation 18.
EAn means the ancillary project emissions for the reporting period, in tonnes CO2‑e, worked out using equation 36.
(5) The volume of the methane component of coal mine waste gas converted by the project in the reporting period, in tonnes CO2‑e, is worked out using the formula (equation 17):
where:
MCom means the volume of the methane component of coal mine waste gas converted by the project in the reporting period, in tonnes CO2‑e.
γ means the factor for converting a quantity of methane from cubic metres to tonnes CO2‑e in section 3.21 of the NGER (Measurement) Determination.
QCH4,i means the volume of the methane component of coal mine waste gas sent to electricity production device i as part of the project in the reporting period, in cubic metres, worked out:
(a) using equation 26; or
(b) using an integrated monitoring system.
DE means the factor for OFif in section 3.14 of the NGER (Measurement) Determination.
QCH4,h means the volume of the methane component of coal mine waste gas sent to flaring or flameless oxidation device h as part of the project in the reporting period, in cubic metres, worked out:
(a) using equation 12; or
(b) using an integrated monitoring system.
i means an installed electricity production device.
h means an installed flaring or flameless oxidation device.
(6) The emissions from the methane component of coal mine waste gas converted by the project in the reporting period, in tonnes CO2‑e, is worked out using the formula (equation 18):
where:
EMD means the emissions from the methane component of coal mine waste gas converted by the project in the reporting period, in tonnes CO2‑e.
EMD,i,j means the emissions of gas type j released from the conversion of the methane component of coal mine waste gas by electricity production device i as part of the project in the reporting period, in tonnes CO2‑e, worked out using equation 27.
EMD,h,j means the emissions of gas type j released from the conversion of the methane component of coal mine waste gas by flaring or flameless oxidation device h as part of the project in the reporting period, in tonnes CO2‑e, worked out using equation 13.
Note: Gas type j is carbon dioxide, methane or nitrous oxide.
i means an installed electricity production device.
h means an installed flaring or flameless oxidation device.
Division 6—Expansion electricity production project method
29 Summary
The carbon dioxide equivalent net abatement amount for an expansion electricity production project is the abatement achieved from installing and operating electricity production devices (subject to a baseline) less:
(a) the emissions from operating the installed electricity production devices; and
(b) ancillary emissions of the project; and
(c) certain parameters associated with electricity production.
The abatement achievable from existing flaring or flameless oxidation devices and existing electricity production devices is used to determine a baseline for working out the abatement achieved by the project. Only abatement above this baseline is counted as abatement achieved by the project.
30 Net abatement amount
(1) The carbon dioxide equivalent net abatement amount for an expansion electricity production project for the reporting period, in tonnes CO2‑e, is worked out using the formula (equation 19):
where:
AN means the carbon dioxide equivalent net abatement amount for the expansion electricity production project for the reporting period, in tonnes CO2‑e.
AP means the project emissions abated for the reporting period, in tonnes CO2‑e, worked out using equation 20.
AG means the displaced electricity emissions from electricity production in the reporting period, in tonnes CO2‑e, worked out using equation 28.
(2) The project emissions abated for the reporting period, in tonnes CO2‑e, is worked out using the formula (equation 20):
where:
Ap means the project emissions abated for the reporting period, in tonnes CO2‑e.
MCom means the volume of the methane component of coal mine waste gas converted by the project in the reporting period, in tonnes CO2‑e, worked out using equation 21.
EMD means the emissions from the methane component of coal mine waste gas converted by the project in the reporting period, in tonnes CO2‑e, worked out using equation 22.
EAn means the ancillary project emissions for the reporting period, in tonnes CO2‑e, worked out using equation 36.
(3) The volume of the methane component of coal mine waste gas converted by the project in the reporting period, in tonnes CO2‑e, is worked out using the formula (equation 21):
where:
MCom means the volume of the methane component of coal mine waste gas converted by the project in the reporting period, in tonnes CO2‑e.
γ means the factor for converting a quantity of methane from cubic metres to tonnes CO2‑e in section 3.21 of the NGER (Measurement) Determination.
DE means the factor for OFif in section 3.14 of the NGER (Measurement) Determination.
XFl,t means the volume of the methane component of coal mine waste gas sent to installed and existing flaring or flameless oxidation devices as part of the project during time interval t less the baseline for the methane component of coal mine waste gas sent to flaring or flameless oxidation devices for the project, in cubic metres, worked out using equation 23.
XGen,t means the volume of the methane component of coal mine waste gas sent to installed and existing electricity production devices as part of the project during time interval t less the baseline for the methane component of coal mine waste gas sent to electricity production devices for the project, in cubic metres, worked out using equation 24.
t means a time interval in the reporting period.
(4) The emissions from the methane component of coal mine waste gas converted by the project in the reporting period, in tonnes CO2‑e, is worked out using the formula (equation 22):
where:
EMD means the emissions from the methane component of coal mine waste gas converted by the project in the reporting period, in tonnes CO2‑e.
EMD,i,j means the emissions of gas type j released from the conversion of the methane component of coal mine waste gas by electricity production device i as part of the project in the reporting period, in tonnes CO2‑e, worked out using equation 27.
EMD,h,j means the emissions of gas type j released from the conversion of the methane component of coal mine waste gas by flaring or flameless oxidation device h as part of the project in the reporting period, in tonnes CO2‑e, worked out using equation 13.
Note: Gas type j is carbon dioxide, methane or nitrous oxide.
i means an installed electricity production device.
h means an installed flaring or flameless oxidation device.
31 Volume of methane sent to conversion devices
Methane sent to flaring or flameless oxidation devices
(1) The volume of the methane component of coal mine waste gas sent to installed and existing flaring or flameless oxidation devices as part of the project during time interval t less the baseline for the methane component of coal mine waste gas sent to flaring or flameless oxidation devices for the project, in cubic metres, is worked out using the formula (equation 23):
where:
XFl,t means the volume of the methane component of coal mine waste gas sent to installed and existing flaring or flameless oxidation devices as part of the project during time interval t less the baseline for the methane component of coal mine waste gas sent to flaring or flameless oxidation devices for the project, in cubic metres.
QCH4,m,t means the volume of the methane component of coal mine waste gas sent to device m as part of the project during time interval t, in cubic metres, worked out in accordance with the monitoring requirements.
Om,t means a binary function which has the value 1 if device m is operating during time interval t and 0 if it is not.
Note: Operating is defined in section 5.
QCH4,h,t means the volume of the methane component of coal mine waste gas sent to flaring or flameless oxidation device h as part of the project during time interval t, in cubic metres, worked out in accordance with the monitoring requirements.
Oh,t means a binary function which has the value 1 if device h is operating during time interval t and 0 if it is not.
Note: Operating is defined in section 5.
BCH4,Fl means the baseline for the methane component of coal mine waste gas sent to flaring or flameless oxidation devices for the project during time interval t, in cubic meters, worked out using equation 37.
m means an existing flaring or flameless oxidation device.
h means an installed flaring or flameless oxidation device.
t means a time interval in the reporting period.
Methane sent to electricity production devices
(3) The volume of the methane component of coal mine waste gas sent to installed and existing electricity production devices as part of the project during time interval t less the baseline for the methane component of coal mine waste gas sent to electricity production devices for the project, in cubic metres, is worked out using the formula (equation 24):
where:
XGen,t means the volume of the methane component of coal mine waste gas sent to installed and existing electricity production devices as part of the project during time interval t less the baseline for the methane component of coal mine waste gas sent to electricity production devices for the project, in cubic metres.
QEG,i,t (or QEG,n,t) means the quantity of electricity produced by device i (or n) during time interval t, in megawatt hours, worked out in accordance with the monitoring requirements.
FMWh→GJ has the value of 3.6.
Note: This is the factor converting energy in megawatt hours to gigajoules.
Effi (or Effn) means the electrical efficiency of device i (or n), which, subject to subsection (4), has:
(a) the value specified by the manufacturer of the device in the technical specifications for the equipment, with reference to Australian Standard AS 4594.1 or equivalent; or
(b) the default value of 0.36.
ECCMWG means the energy content factor of coal mine waste gas, in gigajoules per cubic metre, worked out in accordance with the monitoring requirements.
BCH4,Gen means the baseline for the methane component of coal mine waste gas sent to electricity production devices for the project during time interval t, in cubic meters, worked out using equation 38.
i means an installed electricity production device.
n means an existing electricity production device.
(4) The same value of Effi and Effn must be used for that parameter for all time intervals in all reporting periods.
Division 7—Displacement electricity production project method
32 Summary
The carbon dioxide equivalent net abatement amount for a displacement electricity production project is the abatement achieved from installing and operating electricity production devices (subject to a baseline) less certain parameters associated with electricity production. However, unlike a new electricity production project or an expansion electricity production project, the carbon dioxide equivalent net abatement amount for a displacement electricity production project generally does not take into account abatement from the conversion of the methane component of coal mine waste gas. Only the abatement from displacing electricity is taken into account. The exception to this is abatement from the conversion of methane from a conversion device that uses ventilation air methane as its primary fuel source where no such device was previously installed.
The abatement achievable from existing electricity production devices (if any) is used to determine a baseline for working out the abatement achieved by the project. Only abatement above this baseline is counted as abatement achieved by the project.
33 Net abatement amount
(1) The carbon dioxide equivalent net abatement amount for a displacement electricity production project for the reporting period, in tonnes CO2‑e, is worked out using the formula (equation 25):
+ APVAM
where:
AN means the carbon dioxide equivalent net abatement amount for the displacement electricity production project for the reporting period, in tonnes CO2‑e.
AG means the displaced electricity emissions from electricity production in the reporting period, in tonnes CO2‑e, worked out using equation 28.
APVAM means:
(a) if a conversion device that has been installed as part of the project uses ventilation air methane as its primary fuel source where previously no such devices existed—the project ventilation air methane emissions abated for the reporting period, in tonnes CO2‑e, worked out using equation 25A.
(b) otherwise—zero.
(2) The project ventilation air methane emissions abated for the reporting period, in tonnes CO2‑e, is worked out using the formula (equation 25A):
where:
APVAM means the project ventilation air methane emissions abated for the reporting period, in tonnes CO2‑e.
MCom means the volume of the methane component of coal mine waste gas converted by the project in the reporting period, in tonnes CO2‑e, by conversion devices that use ventilation air methane as their primary fuel source worked out using equation 25B.
EMD means the emissions from the methane component of coal mine waste gas converted by the project in the reporting period, in tonnes CO2‑e, by conversion devices that use ventilation air methane as their primary fuel source worked out using equation 25C.
EAn means the ancillary project emissions for the reporting period, in tonnes CO2‑e, worked out using equation 36.
(3) The volume of the methane component of coal mine waste gas converted by the project in the reporting period, in tonnes CO2‑e, by conversion devices that use ventilation air methane as their primary fuel source is worked out using the formula (equation 25B):
where:
MCom means the volume of the methane component of coal mine waste gas converted by the project in the reporting period, in tonnes CO2‑e, by conversion devices that use ventilation air methane as their primary fuel source.
γ means the factor for converting a quantity of methane from cubic metres to tonnes CO2‑e in section 3.21 of the NGER (Measurement) Determination.
QCH4,k means the volume of the methane component of coal mine waste gas sent to electricity production device k as part of the project in the reporting period, in cubic metres, worked out:
(a) using equation 26; or
(b) using an integrated monitoring system.
DE means the factor for OFif in section 3.14 of the NGER (Measurement) Determination.
QCH4,l means the volume of the methane component of coal mine waste gas sent to flameless oxidation device l as part of the project in the reporting period, in cubic metres, worked out:
(a) using equation 12; or
(b) using an integrated monitoring system.
k means an installed electricity production device that uses ventilation air methane as its primary fuel source.
l means an installed flameless oxidation device that uses ventilation air methane as its primary fuel source.
(4) The emissions from the methane component of coal mine waste gas converted by the project in the reporting period, in tonnes CO2‑e, by conversion devices that use ventilation air methane as their primary fuel source is worked out using the formula (equation 25C):
where:
EMD means the emissions from the methane component of coal mine waste gas converted by the project in the reporting period, in tonnes CO2‑e, by conversion devices that use ventilation air methane as their primary fuel source.
EMD,k,j means the emissions of gas type j released from the conversion of the methane component of coal mine waste gas by electricity production device k as part of the project in the reporting period, in tonnes CO2‑e, worked out using equation 27.
EMD,l,j means the emissions of gas type j released from the conversion of the methane component of coal mine waste gas by flameless oxidation device l as part of the project in the reporting period, in tonnes CO2‑e, worked out using equation 13.
Note: Gas type j is carbon dioxide, methane or nitrous oxide.
k means an installed electricity production device that uses ventilation air methane as its primary fuel source.
l means an installed flameless oxidation device that uses ventilation air methane as its primary fuel source.
Division 7A—Ventilation air methane only project method
33A Summary
The carbon dioxide equivalent net abatement for a ventilation air methane only project is the abatement calculated for devices using only ventilation air methane. This is worked out using the other methods in this Part that would otherwise apply to the project but only taking into account conversion devices that use ventilation air methane as their primary fuel source.
33B Net abatement amount
(1) The carbon dioxide equivalent net abatement amount for a ventilation air methane only project for the reporting period, in tonnes CO2‑e, is worked out:
(a) as if the project was:
(i) a new flaring or flameless oxidation project covered by the method in Division 2 of this Part; or
(ii) an expansion flaring or flameless oxidation project covered by the method in Division 3 of this Part; or
(iii) a new electricity production project covered by the method in Division 5 of this Part; or
(iv) an expansion electricity production project covered by the method in Division 6 of this Part; and
(b) only taking into account conversion devices that use ventilation air methane as their primary fuel source.
Division 8—General calculations for electricity production methods
34 Volume of methane sent to conversion device
(1) The volume of the methane component of coal mine waste gas sent to device i as part of the project in the reporting period, in cubic metres, is worked out using the formula (equation 26):
where:
QCH4,i means the volume of the methane component of coal mine waste gas sent to device i as part of the project in the reporting period, in cubic metres.
QEG,i means the quantity of electricity produced by device i in the reporting period, in megawatt hours, worked out in accordance with the monitoring requirements.
FMWh→GJ has the value of 3.6.
Note: This is the factor converting energy in megawatt hours to gigajoules.
Effi means the electrical efficiency of device i, which, subject to subsection (2), has:
(a) the value specified by the manufacturer of the device in the technical specifications for the equipment, with reference to Australian Standard AS 4594.1 or equivalent; or
(b) the default value of 0.36.
ECCMWG means the energy content factor of coal mine waste gas, in gigajoules per cubic metre, worked out in accordance with the monitoring requirements.
i means an installed electricity production device.
(2) The same value of Effi must be used for that parameter for all time intervals in all reporting periods.
35 Emissions
The emissions of gas type j released from the conversion of the methane component of coal mine waste gas by device i as part of the project in the reporting period, in tonnes CO2‑e, is worked out using the formula (equation 27):
where:
EMD,i,j means the emissions of gas type j released from the conversion of the methane component of coal mine waste gas by device i as part of the project in the reporting period, in tonnes CO2‑e.
Note: Gas type j is carbon dioxide, methane or nitrous oxide.
QCH4,i means the volume of the methane component of coal mine waste gas sent to device i as part of the project in the reporting period, in cubic metres, worked out:
(a) for a new electricity production project:
(i) using equation 26; or
(ii) using an integrated monitoring system; or
(b) for an expansion electricity production project—using equation 26.
ECCMWG means the energy content factor of the coal mine waste gas, in gigajoules per cubic metre, worked out in accordance with the monitoring requirements.
EFj means the emission factor for gas type j released from the conversion of the methane component of coal mine waste gas that is captured for conversion, in kilograms of CO2‑e per gigajoule, worked out in accordance with the monitoring requirements.
Note: Gas type j is carbon dioxide, methane or nitrous oxide.
i means an installed electricity production device.
36 Displaced electricity emissions
(1) The displaced electricity emissions from electricity production in the reporting period, in tonnes CO2‑e, is worked out using the formula (equation 28):
where:
AG means the displaced electricity emissions from electricity production in the reporting period, in tonnes CO2‑e.
NEGP means the net amount of electricity produced by the conversion of coal mine waste gas by installed and existing electricity production devices as part of the project in the reporting period, in megawatt hours, worked out using equation 29.
EFElec means:
(a) for electricity supplied to an electricity grid that is a grid in relation to which the NGA Factors document, in force on the declaration day, includes an emissions factor—that factor, in kilograms CO2‑e per kilowatt hour (or its equivalent of tonnes CO2‑e per megawatt hours); or
(b) for electricity supplied otherwise than in paragraph (a) (whether to a grid or not):
(i) if the receiver of the electricity is able to provide an emissions factor that reflects the emissions intensity of the displaced electricity (worked out in accordance with subsection (3)) and is applicable on the declaration day—that factor, in kilograms CO2‑e per kilowatt hour (or its equivalent of tonnes CO2‑e per megawatt hours); or
(ii) otherwise—the emissions factor, in kilograms CO2‑e per kilowatt hour (or its equivalent of tonnes CO2‑e per megawatt hours), for off‑grid electricity included in the NGA Factors document in force on the declaration day; or
(c) for electricity produced for the purposes of the mine or the project proponent:
(i) if the project proponent is able to provide an emissions factor that reflects the emissions intensity of the displaced electricity (worked out in accordance with subsection (3)) and is applicable on the declaration day—that factor, in kilograms CO2‑e per kilowatt hour (or its equivalent of tonnes CO2‑e per megawatt hours); or
(ii) otherwise—the emissions factor, in kilograms CO2‑e per kilowatt hour (or its equivalent of tonnes CO2‑e per megawatt hours), for off‑grid electricity included in the NGA Factors document in force on the declaration day.
(2) For the definition of EFElec in subsection (1), displaced electricity is electricity that would have been produced for the receiver, the mine or the project proponent (as the case may be) if electricity had not instead been produced as part of the project.
(3) For subparagraphs (b)(i) and (c)(i) of the definition of EFElec in subsection (1), the emissions factor must:
(a) be worked out on a sent‑out basis; and
(b) be worked out using a measurement or estimation approach that is consistent with the NGER (Measurement) Determination; and
(c) if the displaced electricity would have been produced from more than one source—reflect the weighted average of the emissions intensity applicable on the declaration day of all the sources.
(4) The net amount of electricity produced by the conversion of coal mine waste gas by installed and existing electricity production devices as part of the project (NEGP) in the reporting period, in megawatt hours, is worked out using the formula (equation 29):
where:
NEGP means the net amount of electricity produced by the conversion of coal mine waste gas by installed and existing electricity production devices as part of the project in the reporting period, in megawatt hours.
TEG means the total amount of electricity produced as part of the project in the reporting period, in megawatt hours, worked out using equation 30.
FSL means the amount of electricity produced using energy sources that are not coal mine waste gas by installed and existing electricity production devices as part of the project in the reporting period, in megawatt hours, worked out using equation 32.
AUX means the auxiliary loss for the project in the reporting period, in megawatt hours, worked out in accordance with the monitoring requirements.
DEG means the amount of electricity transmitted or distributed as part of the project in the reporting period (other than electricity used by installed and existing electricity production devices as part of the project or the local distribution network), in megawatt hours, worked out in accordance with the monitoring requirements.
MLF means the marginal loss factor for the project which is:
(a) if the project is part of the national electricity market:
(i) the factor published by the Australian Energy Market Operator Limited (ACN 072 010 327) that was valid for the most number of days in the reporting period; or
(ii) if more than one factor satisfies subparagraph (i) in the reporting period—the average of all the factors that satisfy subparagraph (i) in the reporting period; or
(b) in any other case:
(i) the factor determined by the relevant authority of the State or Territory in which the device is located that was valid for the most number of days in the reporting period; or
(ii) if more than one factor satisfies subparagraph (i) in the reporting period—the average of all the factors that satisfy subparagraph (i) in the reporting period.
(5) The following electricity is disregarded for the purposes of equation 29:
(a) electricity that was not used to directly meet demand for electricity that would otherwise be supplied from:
(i) an electricity grid (such as the grid that constitutes the national electricity market); or
(ii) an electricity generator supplying electricity through a dedicated or shared power line.
(b) electricity produced by a device where an approval to use coal mine waste gas as an energy source:
(i) is required by a Commonwealth, State, Territory or local government authority; and
(ii) the nominated person for the device is unable to give evidence of that approval.
(5A) For the purposes of the definition of FSL in subsection (4), energy sources that are not coal mine waste gas include:
(a) coal mine waste gas sourced from an underground coal mine that:
(i) is not part of the project; and
(ii) does not transport the coal mine waste gas to the project through a dedicated pipe; and
(b) coal mine waste gas sourced from an underground coal mine that:
(i) is not part of the project; and
(ii) could not be part of a coal mine waste gas project to which this determination applies.
(6) If the amount calculated using equation 29 exceeds 1 megawatt hour and results in an amount that is not a whole megawatt hour, the amount must be rounded down to the nearest megawatt hour.
37 Electricity produced by project
(1) The total amount of electricity produced as part of the project in the reporting period, in megawatt hours, is worked out using the formula (equation 30):
where:
TEG means the total amount of electricity produced as part of the project in the reporting period, in megawatt hours.
Xt means the amount of electricity produced by installed and existing electricity production devices as part of the project during time interval t less the baseline for electricity production for the project, in megawatt hours, worked out using equation 31.
(2) The amount of electricity produced by installed and existing electricity production devices as part of the project during time interval t less the baseline for electricity production for the project, in megawatt hours, is worked out using the formula (equation 31):
where:
Xt means the amount of electricity produced by installed and existing electricity production devices as part of the project during time interval t less the baseline for electricity production for the project, in megawatt hours.
QEG,i,t (or QEG,n,t) means the quantity of electricity produced by device i (or n) during time interval t in the reporting period, in megawatt hours, worked out in accordance with the monitoring requirements.
BEG means the baseline for electricity production for the project, in megawatt hours, worked out using equation 34.
i means an installed electricity production device.
n means an existing electricity production device.
Note: For a new electricity production project there will be no device m and therefore no BEG. This may also be the case for a displacement electricity production project.
38 Electricity produced by using fuel other than coal mine waste gas
(1) The amount of electricity produced using energy sources that are not coal mine waste gas by installed and existing electricity production devices as part of the project in the reporting period, in megawatt hours, is worked out using the formula (equation 32):
where:
FSL means the amount of electricity produced using energy sources that are not coal mine waste gas by installed and existing electricity production devices as part of the project in the reporting period, in megawatt hours.
FGJ→MWh has the value of 1/3.6.
Note: This is the factor converting energy in gigajoules to megawatt hours.
Zf means the energy content of fuel type f that is not coal mine waste gas consumed in the reporting period, in gigajoules, worked out using equation 33.
(2) The energy content of fuel type f that is not coal mine waste gas consumed in the reporting period, in gigajoules, is worked out using the formula (equation 33):
where:
Zf means the energy content of fuel type f that is not coal mine waste gas consumed in the reporting period, in gigajoules.
QFSL,f means the quantity of fuel type f consumed by installed and existing electricity production devices as part of the project in the reporting period, in appropriate units, worked out in accordance with the monitoring requirements.
ECFSL,f means the energy content factor of fuel type f, in appropriate units, worked out in accordance with the monitoring requirements.
Note: Energy includes the fuels and energy commodities listed in Schedule 1 to the NGER Regulations 2008. See the definition of energy in section 7 of the National Greenhouse and Energy Reporting Act 2007 and regulation 2.03 of the NGER Regulations 2008.
39 Baseline for electricity production
(1) The baseline for electricity production for the project, in megawatt hours, is worked out using the formula (equation 34):
where:
BEG means the baseline for electricity production for the project, in megawatt hours.
QGen,Cap,n means the recognised capacity of device n during time interval t, in megawatt hours, worked out at the application time in accordance with subsection (3).
AFGen,n means the annual availability factor of device n which, subject to subsection (4) has:
(a) the value calculated in accordance with the standard maintenance cycle specified by the manufacturer; or
(b) the default value of 1.
n means an existing electricity production device.
(2) The summation over n is to be performed over all existing electricity production devices at the point of the highest total recognised capacity of all of the existing devices in the period between 24 April 2014 and the application time.
Note: The summation over m results in a fixed quantity and is the same for all equal time intervals.
(3) The recognised capacity of device n during time interval t is calculated by multiplying the manufacturer’s specifications for the maximum electricity capable of being produced by operating the device per unit time, with the result expressed in megawatt hours.
(4) The same value of AFGen,n must be used for that parameter for all time intervals in all reporting periods.
Division 9—General calculations for flaring or flameless oxidation and electricity production methods
40 Historic abatement
The historic abatement from the conversion of the methane component of coal mine waste gas from the mine, in tonnes CO2‑e, is worked out using the formula (equation 35):
where:
AH means the historic abatement from the conversion of the methane component of coal mine waste gas from the mine, in tonnes CO2‑e.
γ means the factor for converting a quantity of methane from cubic metres to tonnes CO2‑e in section 3.21 of the NGER (Measurement) Determination.
ECCMWG means the energy content factor of coal mine waste gas, in gigajoules per cubic metre, worked out in accordance with the monitoring requirements.
mean the emission factors for carbon dioxide, methane and nitrous oxide (respectively) released due to the combustion of coal mine waste gas in item 19 of Schedule 1 to the NGER (Measurement) Determination, in kilograms of CO2‑e per gigajoule.
DE means the factor for OFif in section 3.14 of the NGER (Measurement) Determination.
EH means the greater of:
(a) the highest total emissions resulting from the combustion of the methane component of coal mine waste gas from the mine as reported in any NGER report relating to the mine covering an NGER reporting year before the application time, in tonnes CO2‑e (adjusted for any differences in CO2‑e between the NGER report and the end of the reporting period or the application time); and
(b) the total emissions released as a result of the combustion of the methane component of coal mine waste gas from the mine, in tonnes CO2‑e (adjusted for any differences in CO2‑e between the NGER reporting year and the end of the reporting period or the application time), and determined in accordance with reporting requirements under the National Greenhouse and Energy Reporting Act 2007 in the period between:
(i) the start of the NGER reporting year during which the application for the declaration of the project as an eligible offsets project is made; and
(ii) the application time.
Note 1: If two or more collocated mines are part of the project, the NGER reports or calculation of emissions must include the emissions from all mines that are part of the project.
Note 2: If the result of equation 35 is greater than 5 000 tonnes CO2‑e, there has been material abatement (see section 7) and the project cannot be a new flaring or flameless oxidation project or a new electricity production project.
41 Ancillary project emissions
(1) The ancillary project emissions for the reporting project, in tonnes CO2‑e, is worked out using the formula (equation 36):
where:
EAn means the ancillary project emissions for the reporting period, in tonnes CO2‑e.
QElec means the quantity of electricity consumed from the operation of the project that is not produced by the project in the reporting period (if any), in megawatt hours, worked out in accordance with the monitoring requirements.
EFElec means:
(a) for electricity obtained from an electricity grid that is a grid in relation to which the NGA Factors document, in force on the declaration day, includes an emissions factor—that factor, in kilograms CO2‑e per kilowatt hour (or its equivalent of tonnes CO2‑e per megawatt hours); or
(b) for electricity obtained otherwise (whether from a grid or not):
(i) if the supplier of the electricity is able to provide an emissions factor that reflects the emissions intensity of the electricity (worked out in accordance with subsection (2)) and is applicable on the declaration day—that factor, in kilograms CO2‑e per kilowatt hour (or its equivalent of tonnes CO2‑e per megawatt hours); or
(ii) otherwise—the emissions factor, in kilograms CO2‑e per kilowatt hour (or its equivalent of tonnes CO2‑e per megawatt hours), for off‑grid electricity included in the NGA Factors document in force on the declaration day.
QSE,f means the quantity of additional fuel type f that is not coal mine waste gas combusted for stationary energy purposes from the operation of the project in the reporting period (if any), in units appropriate for the application of the energy content factor (ECf), worked out in accordance with the monitoring requirements.
ECf means the energy content factor of fuel type f combusted for stationary energy purposes in Part 1, 2 or 3 (as appropriate) of Schedule 1 to the NGER (Measurement) Determination, in gigajoules per kilolitre (or other appropriate units).
EFf,j means the emission factor for each gas type j released due to the combustion of fuel type f for stationary energy purposes in Part 1, 2 or 3 (as appropriate) of Schedule 1 to the NGER (Measurement) Determination, in kilograms of CO2‑e per gigajoule of fuel type f.
Note: The emission factor incorporates relevant oxidisation factors for the gas type.
(2) For subparagraph (b)(i) of the definition of EFElec in subsection (1), the emissions factor must be worked out:
(a) on a sent‑out basis; and
(b) using a measurement or estimation approach that is consistent with the NGER (Measurement) Determination.
(3) In working out the ancillary project emissions, the project proponent must include any emissions that are reasonably associated with any energy required for the collection, transport and conversion of the coal mine waste gas converted as part of the project.
(4) This includes any emissions resulting from the combustion of fossil fuel or the consumption of electricity purchased from a State, Territory or electricity grid by the following:
(a) compressors, blowers or coal mine waste gas gathering systems;
(b) transporting coal mine waste gas for the purposes of converting it as part of the project.
(5) However, emissions relating to equipment installed for the safety of the mine are not ancillary project emissions.
(6) If the project is an expansion electricity production project or expansion flaring or flameless oxidation project, in working out the ancillary project emissions for the project the proponent must include the proportion of emissions associated with the operation of the following:
(a) installed flaring or flameless oxidation devices;
(b) installed electricity production devices;
(c) supporting equipment for those devices.
Note: The proportion of emissions associated with existing devices are not ancillary project emissions. This includes emissions from devices mentioned in paragraph (c) to the extent those emissions are associated with the operation of existing devices.
(7) If the project is a displacement electricity production project, in working out the ancillary project emissions for the project the proponent must include the proportion of emissions associated with the operation of the following:
(a) installed flaring or flameless oxidation devices that use ventilation air methane as their primary fuel source;
(b) installed electricity production devices that use ventilation air methane as their primary fuel source;
(c) supporting equipment for those devices.
42 Baseline for the methane component of coal mine waste gas sent to flaring or flameless oxidation devices
(1) The baseline for the methane component of coal mine waste gas sent to flaring or flameless oxidation devices for the project during time interval t, in cubic meters, is worked out using the formula (equation 37):
where:
BCH4,Fl means the baseline for the methane component of coal mine waste gas sent to flaring or flameless oxidation devices for the project during time interval t, in cubic meters.
QFl,Cap,m means the recognised capacity of device m during time interval t, in cubic metres, worked out at the application time in accordance with subsection (3).
AFFl,m means the annual availability factor of device m which, subject to subsection (4), has:
(a) the value calculated in accordance with the standard maintenance cycle specified by the manufacturer; or
(b) the default value of 1.
m means an existing flaring or flameless oxidation device.
(2) The summation over m is to be performed over all existing flaring or flameless oxidation devices at the point of the highest total recognised capacity of all of the existing devices in the period between 24 April 2014 and the application time.
Note: The summation over m results in a fixed quantity and is the same for all equal time intervals.
(3) The recognised capacity of device m during time interval t is calculated by:
(a) multiplying the manufacturer’s specifications for the maximum energy released per unit time by the time interval in appropriate units, with the result expressed in gigajoules; and
(b) converting the result of paragraph (a) to cubic metres by multiplying it by the factor 37.7x10‑3 gigajoules per cubic metre.
(4) The same value of AFFl,m must be used for that parameter for all time intervals in all reporting periods.
43 Baseline for the methane component of coal mine waste gas sent to electricity production devices
(1) The baseline for the methane component of coal mine waste gas sent to electricity production devices for the project during time interval t, in cubic meters, is worked out using the formula (equation 38):
where:
BCH4,Gen means the baseline for the methane component of coal mine waste gas sent to electricity production devices for the project during time interval t, in cubic meters.
QGen,Cap,n means the recognised capacity of device n during time interval t, in megawatt hours, worked out at the application time in accordance with subsection (3).
FMWh→GJ has the value of 3.6.
Note: This is the factor converting energy in megawatt hours to gigajoules.
Effn means the electrical efficiency of device n, which, subject to subsection (4), has:
(a) the value specified by the manufacturer of the device in the technical specifications for the equipment, with reference to Australian Standard AS 4594.1 or equivalent; or
(b) the default value of 0.36.
ECCMWG means the energy content factor of coal mine waste gas, in gigajoules per cubic metre, worked out in accordance with the monitoring requirements.
AFGen,n means the annual availability factor of device n which, subject to subsection (4), has:
(a) the value calculated in accordance with the standard maintenance cycle specified by the manufacturer; or
(b) the default value of 1.
n means an existing electricity production device.
(2) The summation over n is to be performed over all existing electricity production devices at the point of the highest total recognised capacity of all of the existing devices in the period between 24 April 2014 and the application time.
Note: The summation over n results in a fixed quantity and is the same for all equal time intervals.
(3) The recognised capacity of device n during time interval t is calculated by multiplying the manufacturer’s specifications for the maximum electricity capable of being produced by operating the device per unit time, with the result expressed in megawatt hours.
(4) The same value of AFGen,n and Effn must be used for that parameter for all time intervals in all reporting periods.