In September 2025, Zhenhua Hai Fu successfully completed the main engine upgrade and modification project for the vessel “Zhenhua 12,” which lasted 25 days. This modification focused on the deep optimization of the main propulsion diesel engine, upgrading the traditional power system to an energy-efficiency optimized main power system. It represents a significant practice for the company in implementing green development concepts and meeting the environmental requirements of the International Maritime Organization (IMO).
Data from the first voyage after the modification show a systematic improvement in vessel performance: the main engine speed increased from 450 rpm to 520 rpm; the speed rose from 5 knots to 7.5 knots; and the vessel turnover increased by 50%. In terms of fuel economy, after switching to heavy fuel oil, the daily consumption was 13 tons, replacing the previous light oil consumption of 12.18 tons per day, resulting in a daily reduction of 14.6% in fuel costs. Lubricating oil consumption decreased from 180 /day to 60 /day, a reduction of 67%, while the operating conditions of the main engine also improved significantly.
This modification project not only achieved the target economic benefits but also met international convention requirements while accomplishing source emission reduction goals, reserving technical space for subsequent low-carbon upgrades. The successful modification of the “Zhenhua 12” vessel validates a feasible path of replacing old vessel retirement with technical upgrades, providing a replicable practical example for the green transformation of traditional vessels.
Industry experts point out that this case demonstrates that through key technical modifications, fleet modernization can be advanced in a more economical and sustainable manner. This holds significant reference value for shipping companies addressing emission reduction challenges and implementing environmental upgrades for in-service vessels, offering innovative solutions for the green and sustainable development of the industry.
