Air cooling: The system is simple and does not require a special hydrogen system and associated sealing oil systems, nor a cooling water system for the generator. There is no need to consider the damage caused by water or hydrogen leakage to the generator, but the cooling effect is worse than hydrogen cooling and water cooling.
Hydrogen cooling: The system is complex and requires specialized hydrogen production equipment and a corresponding sealing oil system. It is sensitive to nearby fire. Although the cooling effect is good, it will gradually be used due to its complexity. system and tedious maintenance.
Water cooling: the effect is good, the system is relatively simple, requires a special cooling water supply system, and is sensitive to water leakage from the generatorr and the conductivity of the cooling water.
Personally speaking: Air cooling system is the simplest, followed by water cooling and finally hydrogen cooling.