for silo fires suppression:
grain or silage??
Look to publications by MWPS, Harvestore, etc.
We have a heck of a good reference library in our offices.
We also use Nitrogen gas to suppress fires.
CO2 is cheap and available, but does have CO in it also.... so monoxide poisoning is a problem with people around..
CO2 is heavier than air so a blanket of gas will build if it does not leak out from below or is not stirred on top.....
Really dangerous if low areas are around a silo... boot pits, etc.... as gas builds up and people go down and die....
if a fire is burning,, inject gas from below air flow up to the hot spot from below will slow a fire and can snuff it.. especially if the top of a bin or silo is closed so gas levels can build,, plastic sheeting and heating duct tape seals, etc.. We've even used a cap on top of the stored burning material of class A foam after the initial injection of gas has slowed the fire and reduced heat.
Becareful with CO2 and CO..
rmn