Future Made in Australia (Guarantee of Origin) Methodology Determination 2025
18Steam supply and use
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18 Steam supply and use
(1) The emissions from steam used for the production pathway for the batch (b), Esteam,b, in kilograms of CO2-e is worked out using the following formula:
Start formula E start subscript steam,b end subscript equals E start subscript steam,is,b end subscript plus E start subscript steam,hol,b end subscript end formula
where:
Esteam,is,b is the emissions from steam supplied by an input supplier for the production pathway for the batch (b) in kilograms of CO2-e, worked out in accordance with subsection (2).
Esteam,hol,b is the emissions from steam generated in a CHP plant by the holder of the production profile used for the production pathway for the batch (b), in kilograms of CO2e, worked out in accordance with subsection (6).
Steam from an input supplier (2) For subsection (1), Esteam,is,b is worked out using the following formula:
Start formula E start subscript steam,is,b end subscript equals sigma with subscript x below it Q start subscript steam,x,b end subscript times EF start subscript steam,x end subscript end formula
where:
Qsteam,x,b is the quantity of steam supplied by an input supplier for the production pathway for the batch (b) from source (x) in gigajoules, monitored or measured in accordance with section 9.
EFsteam,x is either:
(a) 109.375 kilograms of CO2\-e per gigajoule; or
(b) the supplier specific emission factor for steam from a source (x) in kilograms of CO2\-e per gigajoule steam, worked out in accordance with subsection (3).
(3) For paragraph (b) of EFsteam,x in subsection (2), EFsteam,x is worked out using the following formula:
Start formula EF start subscript steam,x end subscript equals start fraction E start subscript steam,is,y end subscript over Q start subscript steam,is,y end subscript end fraction end formula
where:
Esteam,is,y is the scope 1 and scope 3 emissions related to steam production by the input supplier for the year (y) in kilograms of CO2-e, worked out in accordance with subsection (4).
Qsteam,is,y is the quantity of steam produced by the input supplier for the year (y) in gigajoules, provided by the input supplier.
y is the financial year immediately prior to the financial year in which the batch period started.
(4) For subsection (3), Esteam,is,y is worked out using the following formula: