Method of operating hydrogen gas supply system

Abstract

A method of operating a hydrogen gas supply system according to one aspect of the present disclosure includes purging a sealed purge target area by repeating a step plural times in a row, the step including: supplying an inert gas to the purge target area to increase internal pressure of the purge target area; and then, opening the purge target area to vent the inert gas from the purge target area together with a hydrogen gas.

1 . A method of operating a hydrogen gas supply system,
 the method comprising purging a sealed purge target area by repeating a step plural times in a row, the step including:   supplying an inert gas to the purge target area to increase internal pressure of the purge target area; and   then, opening the purge target area to vent the inert gas from the purge target area together with a hydrogen gas.   
     
     
         2 . The method according to  claim 1 , further comprising preventing the hydrogen gas from flowing through a shutoff section by:
 forming the shutoff section in the hydrogen gas supply system;   supplying the inert gas to the shutoff section to increase internal pressure of the shutoff section to predetermined shutoff pressure or more; and   maintaining the internal pressure of the shutoff section at the shutoff pressure or more.   
     
     
         3 . The method according to  claim 2 , wherein:
 a flow control valve that adjusts a supply flow rate of the hydrogen gas is located at the hydrogen gas supply system; and   the shutoff section is formed upstream of the flow control valve.   
     
     
         4 . The method according to  claim 2 , wherein:
 the hydrogen gas supply system includes branch pipes through which the hydrogen gas is supplied to corresponding burners; and   the shutoff section is formed at each of the branch pipes.