Modern ships use branded machines, which can basically use low-quality fuel in navigation and only open a single auxiliary machine. However, due to some domestic ships built in the 1970s and 1980s in China, the status of auxiliary machines and supporting equipment technology The situation is relatively backward. Many ship auxiliary machines are gradually unable to bear the load, and they have to use two auxiliary machines at the same time during the voyage. Opening two auxiliary machines not only increases the workload of the ship and the consumption of spare parts, but also significantly increases the fuel consumption. Under the same load, the fuel consumed by the two auxiliary machines is usually about 15% more than that of a single auxiliary machine. According to the calculation of 1.8 tons of fuel consumed by a single auxiliary engine when sailing a 30,000-ton bulk carrier, if two auxiliary engines are driven at the same time, it will consume about 2.2 to 2.7 tons of fuel. According to the most conservative calculation, the ship will only be opened during navigation. A single auxiliary machine can save more than 0.4 tons of fuel per day. The average annual sailing time is about 200 days, which can save 80 tons of fuel No. 4. The savings for a single ship can be reduced to about RMB 360,000. The cost savings are considerable.
In the past few years, CSCL has been vigorously grasping the ship's maintenance management work, continuously deepening the management details, and vigorously rectifying the old ships in response to the characteristics of the company's old ships, so that the performance of most of the old equipment has been restored. Most ships that have used domestically produced auxiliary machines for nearly three decades can still use only one ship during navigation, which not only saves fuel costs, but also reduces machine wear and further saves spare parts costs. Of course, the premise is to ensure the safe operation of the machine and prevent accidents.
After strengthening the management of the auxiliary machinery of the ship, there are still some auxiliary machines that can not bear the load, the efficiency is low, and the safety hazards are also serious. For this special situation, Zhonghai will carry out technical transformation of individual auxiliary machines and replace the original motives. Or partial modification, the auxiliary machine performance can be significantly improved, and the use of lower quality fuel oil can not only improve the performance of the ship auxiliary machine, ensure the safety of the ship, but also save more fuel costs, and generally recover the cost within two or three years. For some domestic auxiliary machines manufactured in the 1980s, because the auxiliary machines have relatively good performance, the fuel system is modified to enable these auxiliary machines to use higher viscosity fuel oil. Instead of using 180CST fuel oil to save the difference between the two fuels, this transformation is small, the benefits are large, and the economic benefits are most obvious.
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