Abstract: With the increasingly stringent requirements of marine environmental protection, all major classification societies have proposed their own environmental protection class notations. Among them, the additional class notation of DNVGL CLEAN（DESIGN）additional notation sets requirements for the design, operation and equipment of ships to reduce the ship's environmental impact from air emissions, sea discharges and hazardous materials from ship to shore. The environmental notation CLEAN（DESIGN）is quite stringent in the DNVGL rules, which is rarely used in the design of container vessels in recent years. A dual-fuel container vessel is a green ship that has the notation CLEAN（DESIGN）. In the process of research and development, the container vessel has broken through a series of design essentials, such as the arrangement of engine room and liquid tanks, sewage treatment and fuel tank protection, reaching a new level of green environmental protection for container vessels. This article systematically summarizes the requirements of CLEAN（DESIGN）notation for the machinery design of container vessels, and studies the influence of this notation on the machinery design of container vessels. It also shows the design ideas and schemes of this vessel combining with the practical project, and presents measures for further improvement of the environmental protection level of container vessels.

Key words: container vessel, class notation, CLEAN（DESIGN）, machinery design

摘要： 随着海洋环境保护的要求日益严格,各主要船级社均提出了自己的环保船级符号。DNVGL的CLEAN（DESIGN） 附加符号为船舶的设计、操作和设备设定相关要求,以减少排放到空气中和海洋中以及从船舶运送到岸上的有害物质对环境的影响。CLEAN（DESIGN）是DNVGL规范中较为严格的环保符号,在近几年的集装箱船设计中鲜有应用。某型双燃料集装箱船是取得CLEAN（DESIGN）符号的绿色船舶,在研发过程中突破了一系列设计要点,包括机舱液舱布置、生活污水处理、燃油舱保护等,达到了集装箱运输船绿色环保的新高度。该文系统总结了CLEAN（DESIGN）符号对集装箱船轮机设计的要求,研究了该符号对集装箱运输船轮机设计的影响,结合实际项目展示了实船的设计思路和方案,提出了进一步提升集装箱运输船绿色环保水平的措施。

关键词: 集装箱船, 船级符号, CLEAN（DESIGN）, 轮机设计