A Study on the Numerical Analysis of Main Valve for Emergency Escape Using Marine Craft CO2 System

Recently, there have been growing concerns on ships, one of the means to transport plant facilities, as studies on developing large scale plant facilities have been carried out. Particularly, carbon dioxide system, one of the fire safety systems, is mainly used as the fire safety facility of ships, and main valves are employed for supplying carbon dioxide. However, studies on main valves used in ships are yet to be carried out more. Especially, when carbon dioxide is sprayed as a main function of main valves at lower pressure than required, firefighting is put into difficulty. Accordingly, to solve such problem, this study observed internal pressure change using flow analysis of the main valve, then conducted fluid-structure interaction analysis based on its result, and finally investigated disk’s opening and closure and the structural safety and characteristics depending on valve’s inlet and outlet diameters.