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2024 electricity Generation chart - thermal power

Powered by coal

Stanwell owns and operates two of Queensland’s most important coal-fired power stations; assets that have delivered affordable, reliable and secure electricity to Queenslanders for decades.

As we diversify our portfolio with firmed renewable energy and storage, we remain committed to maintaining the reliability and performance of our existing assets. The Stanwell and Tarong power stations remain among the most efficient and consistently reliable generators in the National Electricity Market, with a twelve-month moving average reliability factor exceeding 98 per cent across our thermal portfolio.

We also recover and reuse coal combustion products from our sites to support circular economy outcomes across other industries.

In 2024, coal powered energy represented 52% of Australia's energy supply - Clean Energy Council.

HOW THERMAL POWER WORKS

Coal-fired power stations generate electricity through a steam-driven process.

Coal is burned in large boilers to heat water, producing high-pressure steam. This steam flows through a turbine, causing it to spin at high speed – typically 3,000 revolutions per minute. The turbine is connected to a generator, which converts the mechanical energy into electricity.

After passing through the turbine, the steam is cooled in a condenser and converted back into water. This water is then pumped back into the boiler, and the cycle begins again.

Cooling towers, recognisable by their hyperbolic shape, use natural airflow to cool the circulating water. As hot water flows down through the tower, it releases heat into the atmosphere as visible water vapour.

Before electricity reaches homes and businesses, transformers increase the voltage so it can travel long distances across the transmission network.

The by-product of coal burning is fine ash which is captured by pollution controlling electrostatic precipitators and collected to recycle as Coal Combustion Products (CCPs). CCPs include fly ash, bottom ash and cenospheres which can be used by the construction and concrete industries as a sustainable alternative to natural quarry materials in concrete manufacture and road repair and construction.

Tarong power stations

Our flagship assets

  • Tarong power stations

    Located 45 km south-east of Kingaroy in the South Burnett region, the Tarong and Tarong North power stations supply around 20% of Queensland’s electricity needs. In 2024, Tarong Power Station and Meandu Mine celebrated 40 years of continuous operation.

    Tarong Power Station consists of four 350 MW generating units. Tarong North Power Station is a 443 MW advanced-cycle unit that uses supercritical boiler technology, increasing thermal efficiency and reducing emissions by converting more heat energy into electricity.

    Coal is supplied by conveyor from the neighbouring Meandu Mine, and water is sourced from Boondooma Dam under a 30,000 megalitre annual allocation.

    Emissions at both stations are managed through low nitrogen oxide (NOx) burners, electrostatic precipitators and efficient operating practices. Continuous emissions monitoring systems (CEMS) were installed in 2019 to further enhance transparency and compliance.

    Read more about the stations here:

    Tarong power stations
    Tarong Power Station sunset
  • Stanwell Power Station

    Stanwell Power Station is located 22 km west of Rockhampton and supplies around 10 per cent of Queensland’s electricity needs. It is one of the most efficient and automated subcritical power stations in the country, occupying a 1,600-hectare site.

    The station’s high performance is underpinned by innovative technology, disciplined asset management and skilled operational teams.

    Coal is primarily sourced from the Curragh Mine, with supplementary supply as needed. Water is drawn from the Fitzroy River through Sunwater’s Eden Bann Weir scheme, with an annual allocation of approximately 24,000 megalitres.

    Environmental controls include low NOx burners, electrostatic precipitators and CEMS, with all emissions managed in line with regulatory requirements.

    Find out more from the link below:

    Stanwell Power Station
    Stanwell Power Station
  • Coal Combustion Products

    Coal combustion products (also known as CCPs) is the collective name for fly ash, bottom ash or cenosphere(s) resulting from the combustion of coal within coal fired power stations.

    Each year Stanwell dispatches hundreds of thousands of tonnes of CCPs into the concrete and construction industries where its use contributes to the conservation of natural resources and a reduction in carbon emissions associated with concrete manufacture and quarrying of natural materials.

    While the majority of CCPs are provided to concrete manufacturing, where fly ash is commonly used to replace 20-30% of the cement reducing the green house gas emissions, Stanwell is also involved in researching the greater use of CCPs in road repair and construction.

    Read more about CCPs and the circular economy from the link below.

    Coal Combustion Products
    CCPs in road construction

THERMAL INFORMATION HUB

View all Thermal Power news

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