What energy efficiency improvements will be implemented as a result of the Efficiency Upgrade?
The main energy improvement will be the installation of a co-generation unit at the Pinjarra powerhouse in conjunction with Alinta Gas. The principal atmospheric emissions from the cogeneration unit will be water vapour, carbon dioxide (CO2) and oxides of nitrogen (NOx). The co-generation units will burn natural gas and will therefore emit very low levels of particulates, carbon monoxide, sulphur dioxide and volatile organic compounds (VOCs). Further, as one of Alcoa’s powerhouse boilers will be fitted with low NOx burners as part of the refinery Efficiency Upgrade, the increase in general refinery oxides of nitrogen (NOx) emissions will be offset. The co-generation project is expected to reduce greenhouse gas emissions as the result of more efficient steam generation and use.
