Experimental Analysis of the Effects of Ship Motion on Hydrogen Dispersion in an Enclosed Area

This study aims to experimentally quantify the hydrogen diffusion characteristics by ship motion. Hydrogen leakage experiments were conducted under various ship motion conditions, and the corresponding hydrogen concentrations for each sensor were expressed by an equation. The experimental facility was a scale model of the hydrogen fuel storage room of a ship. An experiment was conducted by implementing the roll and pitch motions of the ship as well as motion direction using a ship simulator. In the equation describing the hydrogen concentration, the minimum and maximum root mean square deviations were 0.987 and 0.707, respectively, and the correlations were 0.000109 and 0.0012289. Although the results differed as per the sensor location, the hydrogen concentration was affected by the motion period of the ship. The experimental results and prediction equations can be useful for sensor and vent location selection by predicting the concentration when hydrogen leaks in ships in motion.