In theory it would seem possible.
However, the way most machines are built, meaning the way the internal piping for charging/purging is constructed, CO2 is chosen because of it's weight versus hydrogen and air.
Because CO2 is heavier than air it is "injected" into the bottom of the generator casing to push the hydrogen up and out the top of the generator casing.
When using air to purge the CO2 from generator casing, it is "injected" into the top and used to push the CO2 out the bottom of the generator casing.
You might also need to have different casing gas monitoring equipment for purging and charging as most monitors measure for the presence of H2 in air, or H2 in CO2, or similar. I've never seen one that measure anything in N2 or N2 in anything (for generator casings, that is).
You should study the internal piping arrangement drawings for the generator(s) at your site, and then analyze the situation to see if you could make this work. Let us know how you fare.
Hope this helps!
However, the way most machines are built, meaning the way the internal piping for charging/purging is constructed, CO2 is chosen because of it's weight versus hydrogen and air.
Because CO2 is heavier than air it is "injected" into the bottom of the generator casing to push the hydrogen up and out the top of the generator casing.
When using air to purge the CO2 from generator casing, it is "injected" into the top and used to push the CO2 out the bottom of the generator casing.
You might also need to have different casing gas monitoring equipment for purging and charging as most monitors measure for the presence of H2 in air, or H2 in CO2, or similar. I've never seen one that measure anything in N2 or N2 in anything (for generator casings, that is).
You should study the internal piping arrangement drawings for the generator(s) at your site, and then analyze the situation to see if you could make this work. Let us know how you fare.
Hope this helps!