How much water is produced by a hydrogen fuel cell car?
I have done some work with fuel cells and in a straight direct in, direct out fuel cell, the water output is relative to the amount of hydrogen in. The fuel the cell demands the more water is produced. But if the water was condensed into liquid it would be a very small amount, we are not talking about buckets just for a trip to the shops. As a general consumption rate, a 100w fuel cell running at full capacity, would produce about 200ml of water in 12 hours. Direct methanol fuel cells are different, they convert the methanol into hydrogen but the methanol is diluted with water in the first place. Many companies are working on an almost closed loop system where the water produced is condensed, fed back into the fuel cell and internally dilutes the methanol. In theory creating a zero output car, however you must remember there is a considerable amount of heat produced from the cell. A 100w fuel cell creates a 100w of electric but also 100w of heat, making it 50% efficient. Way better tha
