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How Optimized Energy Management Delivers Reliability, Efficiency and Sustainability at Fekola Mine in Mali

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Fekola Mine Mali

By Luke Witmer

Since B2Gold first acquired the Fekola gold mine, located in a remote corner of southwest Mali, exploration studies revealed the deposits to be almost double the initial estimates.

A recent site expansion has just been completed, and while the existing power units provide enough power to support the increase in production, the company sought to reduce its energy costs, cut greenhouse gas emissions, and increase power reliability.

The addition of a 35MWp solar photovoltaic (PV) plant and 17MW/15MWh of energy storage to the existing 64MW thermal engine plant was decided. This new energy mix is anticipated to save over 13 million litres of fuel, reduce carbon emissions by thirty-nine thousand tons per year, and generate a payback in just over four years.

Such an elaborate hybrid configuration needs a powerful brain to deliver on all its potential: Wärtsilä’s GEMS, an advanced energy management system, has been set up to control the energy across the fleet of power sources, thermal, renewable, and battery storage.

The integration, control, and optimization capabilities provided by GEMS allow the thermal units to be run at the most efficient rate and enable the battery storage to handle the large load step changes and volatility of the solar PV generation assets.

Integrated Hybrid Energy Solution

In the context of the Fekola mine, which is an off-grid electrical island, the battery is performing a lot of different services simultaneously, including frequency response, voltage support, shifting solar energy, and providing spinning reserves. The energy load is very flat, with a steady consumption rate around 40MW as the mining equipment is operating consistently, 24/7.

However, if an engine trips offline and fails, the battery serves as an emergency backstop. The controls reserve enough battery energy capacity to fill the power gap for the time it takes to get another engine started and the software inside each inverter enables the battery to respond instantaneously to any frequency deviation.

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The reciprocating engines operate most efficiently at 85-90 per cent of their capacity, this is their “sweet spot”. But if there is a sudden spike in demand, if a little more power is needed, or if mining equipment is coming online, then another engine needs to be run to meet the extra load. With the battery providing spinning reserves, the engines can be kept running at their sweet spot, reducing the overall cost per kilowatt-hour.

Moreover, with the solar plant providing power during the day, three to four engines can be shut down over this period, providing a quiet time to carry out preventive maintenance. This really helps the maintenance cycle, ensuring that the engines operate in a more efficient manner.

Solar PV volatility can be intense. On a bright day with puffy clouds passing by a solar farm of this size can easily see ramps of 25MW over a couple of minutes. This requires intelligent controls, dynamically checking the amount of solar that can be let into the grid without causing an issue for the engine loadings or without overloading the battery.

Conducting the Orchestra

The GEMS intelligent software provides the optimization layer that controls all the power sources to ensure that they work together in harmony. The user interface (UI) gives access to all the data and presents it in a user-friendly way.

Accessible remotely, all operations are simulated on a digital twin in the cloud to verify the system controls and simulate the most efficient operating scenarios to lower the cost of energy. This is an important software feature, both during and after commissioning as it allows operators to train on the platform ahead of time and familiarise themselves with the automated controls and dynamic curtailment of renewables. The UI provides the forecast for renewables and the battery charge status at any given moment, it can provide push email or phone notifications for alerts; telling operators when to turn off an engine and when to turn it back on.

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The software is constantly analysing the data and running the math to solve the economic dispatch requirements and unit commitment constraints to ensure grid reliability and high engine efficiency. Load forecasting integrates the different trends and patterns that are detectable in historic data as well as satellite-based solar forecasting to provide a holistic approach to dispatching power. The Fekola site has a sky imager, or cloud tracking camera with a fisheye lens, that provides solar forecasts for the next half hour in high temporal resolution.

To ensure that operators really understand the platform, and have visibility over the advanced controls, the UI provides probability distributions of the solar forecast. Tracking the forecast errors enables operators to see whether the solar is overproducing or underproducing what the forecast was expecting at the time and provides visibility to the operators on the key performance indicators. This feedback is an important part of the machine/human interface and provides operators with insight if an engine is required to be turned on at short notice.

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Automated curtailment enables the optimization of the system providing a reactivity that people cannot match. By continually monitoring the engine loadings and battery, the system is ready to clamp down on solar if it gets too volatile or exceeds some spinning reserve requirement.

For example, if a large, unexpected cloud arrives, the battery is dispatched to fill the gap while the engines ramp up. Once the cloud disappears, however, the engines remain committed to operating for a few hours, and the solar power is transferred to recharge the battery.

Over time, as load patterns shift, the load forecasting algorithm will also be dynamically updated to match the changing realities of the load. As mining equipment hits layers of harder rock, increasing the power load, the system will adjust and dispatch the engines accordingly.

Hybrid solutions will become the new gold standard for off-grid heavy energy users

The Fekola mine project incorporates the largest off-grid hybrid power solution in the world, demonstrating the growing case for clean energy and its sustainable and economic potential for mines in Africa and beyond.

As the cost of batteries and solar panels continues to become more competitive, hybrid solutions are proving to be a realistic and effective means for increasing energy reliability and lowering operating costs in any context, thus freeing up resources to improve the human condition; whether through cheaper materials and gainful employment, or by providing broader access to reliable electricity for healthcare, education, and improved quality of life.

Luke Witmer is the General Manager, Data Science at Wärtsilä Energy Storage and Optimization

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Feeding the Present and Future Nigerians: The Role of Government, Businesses and Society

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Timi Olubiyi Data-driven Economy

By Timi Olubiyi, PhD

Undoubtedly, the demand for more food consumption is the case globally, mainly due to the increasing population year on year.

One of the extreme challenges that Africa faces particularly Nigeria is that of feeding its growing population amidst other perennial issues.

Consequently, this makes hunger, undernutrition, and food insecurity prevalent across the continent despite government agriculture and food business sector supports. Without mincing words, food insecurity might worsen if the population continues to grow and a corresponding reaction to arrest the situation is not in sight.

In Nigeria, each year the country losses and wastes a substantial portion of its total food production which is never preserved despite hunger and undernutrition that exist. One of the key reasons is that food loss and food waste continue to grow without any significant intervention by the government or businesses.

The magnitude of food loss and waste (FLW) is undeniably common and high in the country along the food supply chain, particularly from the North to the South of the country.

The loss and waste problem have been neglected for so long and the last few years have witnessed a consistent increase as a result of heightening insecurity, movement, and transport restrictions due to the novel coronavirus (COVID-19) pandemic, street trading, open animal grazing, decrepit infrastructure, illiteracy, inconsistent power supply, environmental pressure, lack of innovation and climate change.

Though food loss and waste are a global problem, it appears it is more prevalent in Nigeria now with the current realities. Therefore, persistent food loss, and food waste amid starvation should not be overlooked, this piece should trigger a wake-up call.

While I agree that both “food waste” and “food loss” signifies the food portion that is wasted and not eaten, the terms are different but often use interchangeably.

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Painfully, both are damaging to the economy, businesses, households, and the well-being of the populace. The fact is food loss and waste are quite different anyway in terms of origin and scope and the true difference lies in exactly where the waste occurs.

According to literature food loss typically takes place at the harvest, storage, transportation, and sometimes at processing, and distribution stages in the food value chain. Staggeringly, in Sub-Saharan Africa, post-harvest food losses are estimated to be worth the US $4 billion annually – or enough to feed at least 48 million people, this is a disclosure in a report by the Food and Agriculture Organization (FAO) of the United Nations. In my opinion, the large chunk of this may likely be from Nigeria, considering the population and economic size of the country in Africa.

Further findings in the report indicated that some of the leading causes of food loss are poor storage, insecurity, loss during transportation, insufficient and inefficient agro-processing skills among smallholder farming communities, and lack of innovative approach to preservation, and insufficient infrastructure.

It is not out of place to mention that with the current realities particularly with the disruptions occasioned by COVID-19 and increasing insecurity, food waste must have increased exponentially in the last two years. Indicating a major barrier to food security and development in the country and this obviously requires attention.

On the other hand, food waste” refers to the food that is of good quality and fit for consumption, but does not get consumed because it is discarded―either before or after and it is left to spoil. Surveys of families in Lagos State the economic capital of the country to understand the causes of food waste elicited packaging and preservation as a key aspect of the problem. One of the root causes of food waste is a lack of power and some restaurants equally mentioned lack of proper packaging techniques. It was easy to conclude from the survey that food waste occurs at various stages of the supply chain due to a lack of constant power and adequate packaging.

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Though funding and investing in agriculture or the food sector can improve food security and promote sustainability, in my opinion, improved food sufficiency can be achieved by considering the reduction of food loss and food waste. This can be a more effective and cost-saving strategy for a developing economy like Nigeria at this time. Because when food is lost or wasted, all the resources that are used to produce the food, including water, land, power, labour, and capital, are also wasted. So, a reduction in loss or wastage will more than likely reduce wasted resources and increase profits along the food supply chain.

To address this prevailing huge problem, businesses and the government must result in policy responses to enhance storage, cooling technologies, and packaging for the preservation of perishable foods and to lengthen food shelf lives.

The good news is that there are a variety of ways to prevent food loss and waste throughout the supply chain, for example, investment can be made in the importation of cooling and refrigerated trucks for transportation of perishable fruit and vegetables. Farm produce such as tomatoes, plantain, or even catfish can be preserved with the cooling system from the farms directly to urban businesses or consumers, thereby reducing food loss and increasing fresh produce availability in the country.

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Furthermore, innovative smart food packaging and smart sensing technologies for monitoring food quality can be also be introduced for the sustainability of high-quality standards and improved product safety.

These are lines of business opportunities for investors to explore or for the attraction of foreign direct investments(FDIs). Sincerely, the government, businesses, and decision-makers need to target investments deliberately in the food supply value chain because opportunities are bound. The government also needs to create incentives to boost efforts to reduce food losses by businesses and smallholder farmers.

In conclusion, no single solution can tackle this whole issue but having an innovative mindset, can get the government, businesses, researchers and the populace started.

In fact, reducing food wastage will strengthen and enhance general food security in the country. Indeed, investments in training, technology, digital agriculture, innovation, and behavioural change are key to reducing food loss and waste. Therefore, innovative initiatives in the agriculture sector should be encouraged because it will create more job opportunities and also improve urban-rural migration, increase food exports, and reduce food imports. Good luck!

How may you obtain advice or further information on the article?

Dr Timi Olubiyi is an Entrepreneurship & Business Management expert with a PhD in Business Administration from Babcock University Nigeria. He is also a prolific investment coach, seasoned scholar, Chartered Member of the Chartered Institute for Securities and Investment (CISI), and Securities and Exchange Commission (SEC) registered capital market operator. He can be reached on the Twitter handle @drtimiolubiyi and via email: drtimiolubiyi@gmail.com, for any questions, reactions, and comments

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Christianity, Economics, Politics & Why Education Does not Work

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Education Does not Work

By Nneka Okumazie

There are at least two guarantees of most education – procedure and profile: a procedure that shows how to reach an outcome and a profile that shows that the procedure was passed. There are other possibilities with education, but many get through both destinations and park.

There are lots of places around the world, developed and developing, where people rail about education quality or inefficiency. But, maybe those aren’t the ways to look at education if procedure and profile are achieved.

Looking broadly at education – there are 3 Fs to consider: fiction, fusion and fission.

There are many things anyone can read, learn or be taught but not understand. There are things that are real that can be explained but would seem like fiction to many.

It is possible to explain how telecommunication works to anyone, but many may not get the concept of waves. It is possible to see rockets and explain the science to many but would be too complex to understand.

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There are lots of new technologies, advances that people can be told about and shown, but would remain as fiction to them.

There are people who learn many procedures, get the profile, but remains fiction to them.

Knowledge – in general, is fusion, information coming together to become a unit or adding new units to existing.

Procedures – are a fusion of stuff. Fusion is common, happens often and can be informal.

Fission is the hardest and rarest of education.

Though people have spikes of fission on some aspects of what they have learned at some point, splattering and effervescing of extraordinary magnitude is the origin of major paths of advances through time.

It is true that many advances take years with continuous tests and efforts, but the intellect of fission does much at any time in the process.

Thinking about one thing and having several spectrums of it – towards accuracy is the height of the result of learning that the world needs more of, but gets less and less of.

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Quality of education may guarantee some fission, quality of tutor, sources, or mentor may try, but sometimes, it is either innate or something electrifies at some point.

Intellect fission results in hyper passion, courage, etc. different from those possessing procedural education that have to passion – [positive or negative] or courage – [positive or negative].

There are people with passion against something who don’t know much, only swinging around procedural knowledge.

There are others too, with some courage to hate, for wickedness, greed, factionalism, etc. that have procedural education, but not intellect fission.

They may get information, but they are not the intellect of fission for progress.

So how is intellect fission achieved?

How is it possible to learn something and the immanent mind reams, flips and sprawls it towards what others cannot just see?

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Maybe focus on how fission intellect.

As progress has glided in the world, so have troubles.

There are solutions and answers needed that education of fission would have provided, or education to spark fission.

But because profile education or stage is in demand – there is less and less care for the education of fission.

Many positions are filled with people who have profiles, but unlikely to move anything forward.

Though some curiosity, observation, creativity, analysis, understanding, great memory and insights may be results of some fission – but just like rungs of a ladder, difference abounds per reach and height.

Criticism is mostly a procedure. Deceit is a procedure. Getting rich is mostly procedural as well.

There are many things that are procedures – input and output.

[Proverbs 20:13, Love not sleep, lest thou come to poverty; open thine eyes, and thou shalt be satisfied with bread.]

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Christianity, Government, Ideology, Dumbness & Politics

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Cambodia Tyrant

By Nneka Okumazie

Is falling for false information dumbness or a factor of human limitation? Assuming this, in the most difficult to verify situation suggests human limitation, there are limitless amounts of things that people fall for – signifying dumbness.

It is easy to get people provoked, happy, moody, emotional or whatever expression is desired, by characteristic twists or turns for those outcomes.

It is almost impossible to be smart all the time. It is rare to be smart most times, but it is possible to be dumb most times – with few flashes of smartness.

Dumbness is probably the nucleus of behaviour – with smartness as the shells. Dumbness pulls many but smartness takes work.

Dumbness sometimes is the default of thoughts, sight or other senses. If it appears or speaks like this, it means this; if it acts or moves like that, it is that – without question.

It is far easier to predict that people would be dumb than to predict they’ll be smart. Lots of irrationalities come from dumbness. Deception, though a popular tool, uses dumbness.

It is not often the smart or sensible paths that draw many, but the simple, or feels part. Something can feel so good to taste, smell, or other senses, but does not mean it is good for behaviour, health, etc. Many take the feel-good and damn the consequences.

Something may be so good at present, so easy, so advantageous, so acceptable, but does not mean it is good for the future. Some answers may seem so right, so appraisable but dumb, cheap and impractical.

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It is possible to have gone somewhere to get something at some point, but – would – years on, cause major problems for the people.

There is so much dumb thinking – so much outsourced thinking that turns out to be wrong.

One of the most common spots of dumbness is power. It is often assumed that people in powerful positions manoeuvre to get there and stay there, but predicting the behaviour of the powerful is quite easy because of how power drives dumbness because many assume that just being powerful means smart or better than others – it doesn’t. Ideology can take over power so dumbness can be the leader.

Do whatever you like as long as it does not affect anyone is another dumb statement that does not account for the possibility that private habits can be triggered externally depending on the situation, or say calculation – that assumes it is possible to get away with it, or not get away, but to do it regardless.

In science, evidence determines much. In justice, evidence matters a lot. But some justice failed because the evidence was not presented, or was countered, or ignored not because the crime was not committed. So the supremacy of evidence as the determinant of real true or false – isn’t that smart, it’s just the established rule.

Be careful what you think, or guard thy heart with diligence may seem odd to some, but the heart is the point of pull or plan for most wrongs. Thinking in certain ways is to have done it.

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Selfishness – or the best for one person or group, seems like what is preferred by most, but this classic dumbness becomes a loss, starting from the ones who think it’s of maximum benefit.

The present in all its hardship for many – is a matrix from the past, in how some took to selfishness, for the advantage of the day, to become the loss of the future for things linked to them.

The circuitousness continues.

There is the smart spectrum and there is the dumb spectrum. Some choose or it chooses them. There are those in the dumb spectrum that no knowledge, exposure or information does much to get them away from it. As a fact, as some get more exposed, their dumbness deepens.

Some people often feel others are smart while others feel others are dumb. Smartness or dumbness is not often determined by sides. Most times, dumb people throw dumbness to everyone else, as in the playbook of critics. Criticism – most of the way – is dumbness repackaged and responsibility defenestrated.

Understanding is relevant in how smartness navigates, but dumbness convolves into what many would choose.

Though technology was supposed to make smart, it powered mass social media that lets dumbness go wide. Most people hear, see or read there, they sometimes forget about it, but sometimes end up behaving in ways that express those actions – without tracing it back there.

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Also, most people say stuff as themselves, but often just channelling from that source or acting in ways that blend with what the source would like.

It is important to have internal strength, not just seeking always for the external, but to have this strength to wait a bit or a little, to process things through and properly, before going along the easy, one-way-think option available to all.

Though smartness is far better than dumbness and maybe should not be compared, but smartness at its best is limited. It is possible to be smart, using the information available and be wrong. So even at the peak of smartness, it should be understood that limitations abound.

God is a spirit.

This means God does not exist in the physical or cannot be seen, or instruments used to find distant physical object cannot be used to find heaven or see the Almighty God.

God ways, thoughts and judgement are different.

This means using statements like if God loves why to suffer – isn’t an expression of that understanding.

Genuine Christianity is what Christ wants, but many combine their Christianity with sin and all kinds of acts. Christianity as an ID is not answering the call to be truly born again.

Everyone can be right in their own eyes, but the Creator of the world, Jehovah Almighty knows all.

[Matthew 22:29, Jesus answered and said unto them, Ye do err, not knowing the Scriptures, nor the power of God.]

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