As corporate leaders review their environmental, social, and governance strategies, many have explored how microgrids could enhance plans at decarbonisation sites. Locations used by the mining industry have become viable targets, especially as efforts continue to improve sustainability. Which efforts have occurred so far, and why do they matter?
Aiming to operate wholly with renewables
Decision-makers at Australia’s Oz Minerals began probing how renewables might power some of their sites several years ago, although they deemed the prospect unfeasible at the time. Recently, leaders have turned their attention to a West Musgrave site that mines nickel and copper. Some of the main components of the decarbonisation strategy include a microgrid and electric haul trucks.
The brand's overall goal is to meet all the site's energy needs through renewable sources. The microgrid plays a substantial role in that aspiration, as the involved parties anticipate it will provide more than 80% of the target while operating as the largest renewable asset of its kind in the world.
The company's models indicate an optimal mix of approximately 60 megawatts of solar and 90 megawatts of wind, accompanied by a large battery. However, those overseeing the project still need to finalise the specifics of the battery. This example demonstrates that even if executives cannot act immediately, it is still worthwhile for them to investigate possibilities and take decisive action.
Reshaping South Africa’s mining industry
In South Africa, mining is one of the largest industries in the country and on the continent. Numerous factors have led executives to strongly consider transitioning to renewable options, including power shortages and stakeholder pressure. Microgrids have remained viable, mainly because they increase resilience.
A large mine could face losses up to US$100 million following a major power outage. However, industry analysts believe renewable industry infrastructure, including microgrids, could reduce risks. Many companies have technologies that enable switching between intermittent renewable energy sources and engine-based power generation. This capability ensures that operations run smoothly, regardless of fluctuations in energy-related factors.
Some modules accompanying microgrids generate electricity while using excess waste heat, making gas engines more efficient. These possibilities show it pays to think creatively about decarbonisation strategies, especially when many of the options will likely provide measurable impacts.
This is not the only example of people trying to remedy past issues and pursue a brighter future. Superfund sites in the US are polluted regions with above-average risks of hazardous substance releases. However, research has shown that using these superfund sites for renewable energy produces more than 300 megawatts of electricity, contributing to the country's greener future.
Microgrids make sustainable differences
These compelling examples illustrate why leaders in the mining industry should incorporate microgrids into their decarbonisation strategies. Determining the best approach requires time and dedication, but making informed choices can enhance resilience and bring companies closer to their ESG goals. Individuals can seek advice from peers who have already taken this approach, learning from real successes, setbacks, and recommendations.
Creating a comprehensive plan can also boost the return on investment, especially if the involved parties set time-based milestones connected to ESG goals. Professionals can earn executive buy-in and enhance accountability across organisations.
Author bio
Jane Marsh is a seasoned environmental journalist and the Editor-in-Chief of Environment.co, specialising in in-depth coverage of environmental trends, sustainability, and the evolving energy landscape. With her work featured on leading platforms like Renewable Energy Magazine, Manufacturing.net, and Nation of Change, Jane brings a keen perspective on the intersection of energy innovation and industry practice.