The integration of renewable power into mine power delivery systems is practically achievable using solar power, wind power, and their combined hybrid systems with battery storage capabilities and back-up diesel power for operational efficiency, flexibility, and continuity in power delivery. By using these renewable power systems, mines can conserve diesel fuel usage, mitigate carbon emissions, save on operating costs, while improving mine power security due to their reduced dependency on diesel fuel in remote mine operations.
Key methods of integration
- The use of solar power: large solar PV farms can be erected on unused land in mining areas to satisfy a large percentage of daily electricity needs. Solar panels come in modular forms that allow for scaling with changed demand levels.
- Wind energy: Wind farms complement the power source in mines, specifically where there is plenty of wind, providing clean power that reduces the consumption of diesel fuel.
- Hybrid renewable systems: these systems combine solar, wind, battery energy storage systems (BESS), and diesel generators to provide continuous power. Batteries store excess renewable energy for use during low generation periods, while diesel generators offer backup reliability.
- Energy Resource Management/Renewable Micro-Grids: advanced micro-grid solutions integrate renewable sources of energy in an optimized manner so that the problem of intermittency can be overcome for better power quality.
Benefits to mining operations
- Significant reduction in greenhouse gas emissions and carbon footprint.
- Lower operational costs due to reduced fuel consumption and maintenance.
- Enhanced energy security and independence from unreliable grids.
- Support for sustainability and Environmental, Social, and Governance (ESG) targets.
- Positive impact on local communities by reducing pollution and energy costs.
Examples
- Rio Tinto’s Weipa mine uses a 6.7 MW solar farm to meet about 20% of its daytime energy needs.
- DeGrussa Copper-Gold Mine in Australia operates a hybrid system with 10.6 MW solar, a 6 MW battery, and diesel backup, reducing fuel consumption by over 20%.
- Gold Fields’ Agnew Gold Mine integrates a 10 MW wind farm as part of a hybrid renewable microgrid.
