September 29, 2011
– Comments (3)
More steps. http://www.solardecathlon.gov/videos_house_tours.html
Second step. However I wonder how many people would be out of a job if this happens.
These "water powered" vehicles perhaps do indeed work, but they certainly do not run on just water alone. From what I can tell, they convert the water into its elemental components hydrogen and oxygen through electrolysis, then use those gases for a combustion reaction for power generation (just like in hydrogen/oxygen rocket engines). There is indeed a required input of energy for the electrolytic hydrogen/oxygen generation from the water "fuel", and for initiating subsequent combustion to "drive" the engine. The question is whether the efficiency is any good, and there is also the issue of what I imagine are the batteries to power the electrolysis (and "sparking"), as these will have to be charged with electricity that ultimately comes from coal, gas, nuclear, wind/solar, etc.
Please do not fall under the fallacious belief that these engines run on water like internal combustion engines run on gasoline. There is a small energy investment to combust gas, but the energy released is greater so you get net energy out. This is not the case for electrolysis of water cycling with combustion of its component hydrogen/oxygen...there is no net energy output because if there were it would be a perpetual motion machine and violate the laws of thermodynamics. There is a reason why fossil fuels have become such an integral part of our modern societies, and it isn't some conspiracy on the part of oil companies to keep us paying them for their product.