Abstract: As a strategic national asset ensuring the security of China’s energy resources, the summer extreme heat environmental condition and complex air flow composition of the ocean drilling vessels have become one of the key challenges in the design and construction. By establishing the balance formula of air volume inside a galley, this study sorts and analyzes the airflow parameters such as air conditioner air supply, air intake outside and inside the cabin and air mechanical exhaust. Based on the cooling capacity calculation method for fresh air conditioners specified in ISO 9943:2009, and incorporating personnel comfort requirements, this study proposes a solution for adjusting air conditioning cooling capacity parameters under extreme heat conditions exceeding standard environmental design specifications. Using an ocean drilling vessel as a case study, calculations were performed to develop recommended cooling capacity parameters for such extreme conditions on this vessel. This provides a reference for engineers to clarify air flow composition in complex cabins and to select appropriate cooling equipment under extreme heat environments.

Key words: ocean drilling vessels, compartment airflow balance, extreme heat environment, air conditioning cooling capacity

摘要： 大洋钻探船是保障我国国家能源安全的大国重器,然而其所处的夏季极端高温环境及复杂的舱室气流组成,是设计与建造阶段必须攻克的难点之一。该文通过建立大洋钻探船厨房舱室风量平衡公式,分别对于其厨房舱内进风、舱外进风、空调送风、机械排风等气流参数进行梳理与分析。在根据ISO 9943:2009计算空调制冷量的基础上,结合人员舒适性要求,提出了大洋钻探船在极端高温环境下（超出标准设计条件）的空调制冷量参数方案,为工程技术人员在理清复杂舱室的气流组成和极端高温环境下制冷设备选型提供了参考。

关键词: 大洋钻探船, 舱室风量平衡, 极端高温环境, 空调制冷量