While the ship's auxiliary machinery isn't the primary energy consumer, effective management can lead to significant fuel savings. First and foremost, maintaining high-quality fuel input is essential, as it ensures smooth machine operation and enhances combustion efficiency. Additionally, consistent daily maintenance and refined operational practices are crucial for keeping the equipment in optimal condition. Modern Ships often use branded auxiliary machines that can run on low-quality fuel and operate with just one unit at a time. However, many older vessels built in China during the 1970s and 1980s have outdated auxiliary systems. As a result, these ships frequently need to operate two auxiliary engines simultaneously, which increases both the workload and spare parts consumption, while significantly raising fuel usage. Under similar loads, running two auxiliary engines can consume up to 15% more fuel than using just one. For example, if a single auxiliary engine consumes 1.8 tons of fuel on a 30,000-ton bulk carrier, running two engines would require approximately 2.2 to 2.7 tons. Based on this, using only one engine could save over 0.4 tons of fuel per day. With an average annual sailing time of 200 days, this translates to around 80 tons of fuel saved annually—equivalent to about RMB 360,000 in cost savings. In recent years, CSCL has focused on improving ship maintenance and management, especially for its aging fleet. Through detailed improvements and targeted repairs, the performance of most old equipment has been restored. Many ships that have used domestic auxiliary engines for nearly three decades now operate with just one engine during voyages, saving fuel and reducing wear and tear, which also lowers spare parts costs. However, safety must always remain a top priority to prevent accidents. Despite these improvements, some auxiliary machines still struggle with performance and pose safety risks. In such cases, Zhonghai has initiated technical upgrades, including replacing or modifying certain components. These changes significantly enhance the machines’ efficiency, allowing them to run on lower-quality fuel while ensuring safe operations and further reducing fuel costs. Typically, the investment is recovered within two to three years. For some auxiliary machines built in the 1980s, which still perform well, modifications to the fuel system allow them to use higher viscosity fuel. This change not only improves their performance but also leads to significant cost savings by taking advantage of the price difference between fuels. Since the modification is relatively simple, the economic benefits are highly visible.

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