What is the driving force for humidifying hydrogen?

The power of humidified hydrogen is 30W. According to the product information related to Taobao, DynEco Company of the United States has developed a 1 12B4 wet hydrogen circulator with rated power of 30W, which can be well matched with the direct water injection humidification technology (US6268074), and the booster pump (12Vdc, 48W) can raise the water pressure to 60 145Psi. Us patent 5958613 discloses a technology of injecting liquid water directly into PEMFC anode, which can not only provide water for battery power generation, but also use the latent heat of liquid water evaporation to cool the stack.