Energy efficiency: what it is, how to calculate it, and why it should be prioritized

In a sector where every megawatt counts, ignoring energy efficiency is no longer an option. For operations and maintenance coordinators, understanding and applying energy efficiency strategies has become essential to maximizing asset performance and delivering tangible results.

What is energy efficiency

Energy efficiency is the rational and intelligent use of energy, promoting maximum performance with minimal resources. In other words, it means achieving the same or even better results while consuming less energy.

In the context of renewable energy plants, such as photovoltaic systems, this concept translates into practical actions: reducing losses, upgrading equipment, continuous monitoring, and data analysis. Operational performance is directly impacted by how energy is managed.

What are the main advantages of investing in energy efficiency

When energy efficiency measures are adopted, benefits are seen across multiple fronts. Operating costs are reduced, the lifespan of equipment is extended, and system reliability increases. Furthermore, the company gains reputation and market value by adopting sustainable practices.

These gains are particularly relevant in highly competitive and technically demanding environments. When efficiency is prioritized, failures can be avoided, productivity is enhanced, and the return on investment becomes more evident.

How to calculate energy efficiency

Energy efficiency can be measured by the ratio between the useful energy generated and the total energy consumed in the process. The basic formula is:

Efficiency = (Useful energy / Consumed energy) x 100

However, this calculation may vary depending on the type of asset, its application, and the goals of the analysis. Indicators such as the PR (performance ratio) are used in solar plants to track the actual utilization of solar radiation, constantly monitored by technical teams.

How to improve energy efficiency

Several strategies can be implemented to improve energy efficiency in a plant. Predictive maintenance, for instance, has been adopted to anticipate failures and avoid unexpected downtime. Replacing obsolete components and using smart sensors for data collection are also recommended practices.

In addition, the continuous training of operational teams has proven essential. Technical training enables accurate diagnoses and more effective action plans. Energy management software, combined with automation systems, completes the ideal scenario.

How energy efficiency can benefit the environment

Reducing energy consumption directly impacts the decrease in greenhouse gas emissions. Even though renewable plants like solar have low environmental impact, efficiency improvements reduce losses and prevent unnecessary infrastructure expansion.

By avoiding waste, fewer natural resources are used, and the environmental footprint of operations is reduced. Energy efficiency, therefore, is also a sustainability tool.

Types and classes of energy efficiency

The equipment used in energy generation and management is classified according to its efficiency, with labels such as Procel (in Brazil) or Energy Star (internationally).

These classifications indicate the energy consumption performance of assets. Choosing machines and systems with an A label, for example, has been prioritized by technical coordinators seeking high operational output.

Energy efficiency and renewable energy

Energy efficiency is enhanced when combined with renewable sources. Solar, wind, and biomass plants become even more advantageous when operated with energy intelligence.

As a result, significant reductions in conversion losses are observed, the use of resources is optimized, and energy delivery becomes more predictable.

Energy efficiency and sustainability

Sustainability and energy efficiency are interconnected concepts. While sustainability focuses on ensuring resources for future generations, energy efficiency provides the means to operate with less waste.

Companies committed to the ESG agenda have adopted efficiency as a strategic pillar. Technical teams have contributed directly to this progress by incorporating good practices into daily routines.

Energy efficiency in Brazil

In Brazil, public policies and programs such as Procel have encouraged the rational use of energy. Still, challenges remain, especially in the industrial sector and in managing large plants.

Energy decentralization, driven by distributed generation, has demanded greater focus on performance and reliability. In this scenario, O&M coordinators become key players in the country’s energy transformation.

Energy efficiency in South America

South America has significant renewable energy potential. Countries like Chile, Colombia, and Uruguay have advanced efficiency policies, creating incentives for businesses and consumers.

Even so, infrastructure remains a bottleneck. Energy efficiency emerges as a solution to deliver more energy with less investment in grid expansion.

Energy efficiency in Europe

In Europe, energy efficiency is treated as a strategic priority, especially after supply crises. European Union directives require companies to adopt efficient practices as a condition for subsidies.

Models such as retrofitting old plants and digitizing operations have inspired initiatives in Brazil. Studying European benchmarks may be a valuable path to accelerating local development.

How Delfos maximizes the energy efficiency of its assets

At Delfos, energy efficiency is boosted through the use of artificial intelligence and predictive analysis. Proprietary systems are used to identify hidden failures, suggest operational adjustments, and recover energy that would otherwise be wasted.

Recent cases have shown gains of up to 10 MWh/month after correcting solar inverter issues, based on automated analyses. The platform also allows coordinators to quickly access strategic insights, optimizing decision-making in the field.

For those leading complex operations and seeking to elevate plant performance, energy efficiency must stop being just a goal and become a true priority. Is your operation ready for this leap?

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