Accurate coal stock assessment in thermal power generation is essential for informed decision-making.
Intertek, a global leader in energy and resources, offers a comprehensive methodology that ensures precise measurement of stockpile tonnage and energy determination while prioritising scientific accuracy and safety.
National Greenhouse and Energy Reporting (NGER) scheme
The NGER scheme collects and reports data on greenhouse gas emissions, energy consumption, and production in Australia.
Administered by the Clean Energy Regulator, it requires large corporations and government entities to report emissions and energy use annually.
Coal-fired power stations must report to the scheme if annual Scope 1 emissions exceed 25,000 tonnes of carbon dioxide equivalent. Scope 1 emissions include direct emissions from fuel combustion and facility-owned sources.
Intertek’s patented methodology
Intertek is a pioneer in science-based methodologies for assurance, testing, inspection, and certification services. To support NGER reporting, Intertek developed a patented method that measures coal stockpile tonnage with an accuracy of approximately ±1.8 per cent using advanced 3D surveying and rigorous sampling techniques.
This peer-reviewed methodology, implemented at several Australian coal-fired thermal power stations, accurately determines total coal tonnage and energy properties. It accounts for density variations caused by stockpile compression under gravity and coal blending from diverse sources and grades.
Methodology overview
Intertek’s approach integrates precise 3D volumetric surveys, product sampling, and statistical analysis. An unmanned aerial vehicle (UAV) 3D LiDAR survey provides volumetric accuracy of approximately ±1 per cent, while direct push probe drilling methods capture a full vertical cross-section of the stockpile, addressing any density variations due to the sourcing of coal different mines or seams.
Samples are stored in plastic tubing and analysed at Intertek’s NATA-accredited laboratory, with further testing conducted in-house to meet AS1038.1/2001 and ASTM 6347 standards.
Key benefits
This methodology offers advantages that enhance its accuracy and reliability:
- Precision: Peer-reviewed and patented, it ensures total tonnage assessment within ±1.8 per cent and accurate energy determination.
- Safety: Remote 3D surveying minimises field risks, ensuring personnel well-being.
- Comprehensiveness: The method accounts for stockpile density variations caused by gravity-induced compression and variations in coal.
- Scientific Integrity: Standardised, NATA-accredited laboratory analyses uphold scientific validity.
- Versatility: Adaptable to various scopes, from volumetric surveys to full-scope assessments, including tonnage measurement, laboratory analysis, and customised client-specific evaluations.
Intertek’s scientific methodology provides a robust, reliable solution to coal stockpile tonnage and energy assessment. By integrating advanced 3D surveying, rigorous sampling, and standardised laboratory analyses, the method ensures accurate stockpile measurement and coal property determination, including density, calorific value, and moisture content. Furthermore, this methodology supports compliance with the NGER scheme by providing precise data on energy production and emissions, assisting thermal power stations in meeting regulatory reporting requirements.
This approach enhances transparency and accountability in coal resource management, supporting informed business decisions. Accurate fuel reserve assessments remain critical for a responsible and sustainable energy transition. Intertek’s methodology exemplifies its commitment to providing scientifically sound solutions for the energy sector while ensuring regulatory adherence.