1162 t), topographic conditions, and driving profile. The results indicate that the baseline vehicle presented an average fuel consumption of 138.6 L/100 km, whereas the vehicle with hydrogen addition achieved 124.7 L/100 km, corresponding to a 10.07% reduction in fuel consumption, representing the primary evidence of improved energy efficiency. Additionally, an increase in average operating speed was observed, from 21.2 km/h to 22.16 km/h, corresponding to a 4.50% improvement, which can be attributed to enhanced combustion efficiency and improved engine dynamic response promoted by hydrogen addition. As a direct consequence, operational productivity also increased, from 1.54 to 1.62 ton/km, resulting in a 5.26% gain in productivity. Figure 2 – Field validation workflow. 4. RESULTS Diesel Consumption and Savings: Diesel fuel consumption constitutes one of the primary components of operational costs in mining, accounting for up to 32% of total energy expenditures. In this context, the incorporation of energy-efficiency technologies has a direct impact on operational profitability. The observed reduction of 10.07% in specific fuel consumption represents a significant improvement in operating margins, particularly under conditions of high volatility in oil prices. Regarding performance, the improvement enhances engine response to acceleration demands, resulting in an increase in average speed. The use of hydrogen as a combustionenhancing agent contributes to optimizing engine response under high-load conditions, leading to a 4.50% increase in average speed and a 5.26% gain in productivity, expressed in tonnes per kilometer (t/km). From an environmental perspective, the technology aligns with decarbonization strategies within ESG frameworks adopted by major mining companies, which have established net-zero emissions targets between 2040 and 2050. It represents a relevant transitional solution for heavy-duty fleets, where full electrification still faces technical and economic constraints, enabling an annual reduction of approximately 19 tonnes of CO₂ per vehicle.
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