29Proportion of methane that would have been combusted without upgrade
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29 Proportion of methane that would have been combusted without upgrade
(1) For an upgrade project, the proportion of the methane combusted during the reporting period that would have been combusted without the project is worked out using the formula (equation 17):
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where:
WB,Ex means the proportion of the methane combusted during the reporting period that would have been combusted without the upgrade project.
WCom,Bef means:
(a) if equation 19A is calculated on the basis of data only for 2 years in accordance with subsection (7)—the average proportion of the methane from the landfill that is collected and destroyed during the 2 years before the upgrade is started, worked out using equation 19; or
(b) otherwise—the higher of:
(i) the average proportion of the methane from the landfill that is collected and destroyed during the 2 years before the upgrade is started, worked out using equation 19; and
(ii) the average proportion of the methane from the landfill that is collected and destroyed during the 4 years before the upgrade is started, worked out using equation 19A.
WCom,Aft means the average proportion of the methane from the landfill that is collected and destroyed during the 12 months immediately after the upgrade is completed, worked out using equation 18.
Methane collected and destroyed during 12 months after upgrade
(2) The average proportion of the methane from the landfill that is collected and destroyed during the 12 months immediately after the upgrade is completed is worked out using the formula (equation 18):
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where:
WCom,Aft means the average proportion of the methane from the landfill that is collected and destroyed during the 12 months immediately after the upgrade is completed.
means the factor to convert cubic metres of methane at standard conditions to tonnes of CO2‑e set out in subsection 5.4(1) of the NGER (Measurement) Determination.
MSent,h means the methane sent to the combustion device h during the reporting period, in cubic metres, worked out using equation 8, 9 or 10.
MGen,y means the methane generated by the landfill in year y, in tonnes CO2‑e, worked out using subsection 22(3).
y means the 12 months immediately after the upgrade is completed.
Methane collected and destroyed during 2 years before upgrade
(3) The average proportion of the methane from the landfill that is collected and destroyed during the 2 years before the upgrade is started is worked out using the formula (equation 19):
where:
Section 29 - Carbon Credits (Carbon Farming Initiative—Landfill Gas) Methodology Determination 2015 - Proportion of methane that would have been combusted without upgrade | Zoe
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WCom,Bef means the average proportion of the methane from the landfill that is collected and destroyed during the 2 years:
(a) immediately before the upgrade is started; or
(b) if elected by the project proponent—immediately before the application for declaration of the upgrade project as an eligible offsets project.
means the factor to convert cubic metres of methane at standard conditions to tonnes of CO2‑e set out in subsection 5.4(1) of the NGER (Measurement) Determination.
Qcap,y means the quantity of methane in landfill gas collected for combustion from the landfill during year y, in cubic metres, measured as prescribed in Part 5.2 of the NGER (Measurement) Determination.
Note: The term collected for combustion in the NGER (Measurement) Determination is intended to mean landfill methane collected for combustion for electricity generation.
Qflared,y means the quantity of methane in landfill gas from the landfill that is flared or otherwise combusted for purposes other than electricity generation during year y, in cubic metres, measured as prescribed in Part 5.2 of the NGER (Measurement) Determination.
Qtr,y means the quantity of methane in landfill gas transferred out of the landfill during year y, in cubic metres, measured as prescribed in Part 5.2 of the NGER (Measurement) Determination.
CH4*,y means the estimated quantity of methane in landfill gas generated by the landfill during year y, in tonnes CO2‑e, measured and determined in accordance with subsection (4).
y means a year in the 2 years:
(a) immediately before the upgrade is started; or
(b) if elected by the project proponent—immediately before the application for declaration of the upgrade project as an eligible offsets project.
Methane collected and destroyed during 4 years before upgrade
(3A) The average proportion of the methane from the landfill that is collected and destroyed during the 4 years before the upgrade is started is worked out using the formula (equation 19A):
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where:
WCom,Bef means the average proportion of the methane from the landfill that is collected and destroyed during the 4 years:
(a) immediately before the upgrade is started; or
(b) if elected by the project proponent—immediately before the application for declaration of the upgrade project as an eligible offsets project.
means the factor to convert cubic metres of methane at standard conditions to tonnes of CO2‑e set out in subsection 5.4(1) of the NGER (Measurement) Determination.
Qcap,y means the quantity of methane in landfill gas collected for combustion from the landfill during year y, in cubic metres, measured as prescribed in Part 5.2 of the NGER (Measurement) Determination.
Note: The term collected for combustion in the NGER (Measurement) Determination is intended to mean landfill methane collected for combustion for electricity generation.
Qflared,y means the quantity of methane in landfill gas from the landfill that is flared or otherwise combusted for purposes other than electricity generation during year y, in cubic metres, measured as prescribed in Part 5.2 of the NGER (Measurement) Determination.
Qtr,y means the quantity of methane in landfill gas transferred out of the landfill during year y, in cubic metres, measured as prescribed in Part 5.2 of the NGER (Measurement) Determination.
CH4*+,y means the estimated quantity of methane in landfill gas generated by the landfill during year y, in tonnes CO2‑e, measured and determined in accordance with subsection (4A).
y means a year in the 4 years:
(a) immediately before the upgrade is started; or
(b) if elected by the project proponent—immediately before the application for declaration of the upgrade project as an eligible offsets project.
x means:
(a) if pursuant to subsection (7) WCom,Bef is calculated for the purposes of this subsection based on data for a 4 year period—4;
(b) if pursuant to subsection (7) WCom,Bef is calculated for the purposes of this subsection based on data for a 3 year period—3;
(c) if pursuant to subsection (7) WCom,Bef is calculated for the purposes of this subsection based on data for a 2 year period—2.
(4) CH4*,y is equivalent to CH4* calculated:
(a) under Part 5.2 of the NGER (Measurement) Determination; and
(b) in accordance with the following:
(i) the reporting year is year y, where y means a year in the 2 years immediately before the upgrade;
(ii) methane generation must be determined for the whole landfill as if it were a single sub‑facility zone.
(4A) CH4*+,y is equivalent to CH4* calculated:
(a) under Part 5.2 of the NGER (Measurement) Determination; and
(b) in accordance with the following:
(i) the reporting year is year y, where y means a year in the 4 years immediately before the upgrade;
(ii) methane generation must be determined for the whole landfill as if it were a single sub‑facility zone.
(5) For subsections (4) and (4A), if year y covers 2 financial years, use the method set out in subsection 22(8) (as if CH4gen were CH4*).
(6) To avoid doubt, the time periods in this section relating to a restarting flaring project which was previously an upgrade project relate to the previous upgrade project and are not reset by the declaration of the project as a restarting flaring project.
(7) In subsections (1), (3A) and (4A), references to “4 years” are taken to mean “2 years or, if data is available to the project proponent for that period, 3 years” for an upgrade project applying this determination before the commencement of the Carbon Credits (Carbon Farming Initiative—Landfill Gas) Methodology Determination Variation 2021 that does not have 4 years of previous data.