Peter Eckhoff wrote: >Catastrophic failures would be catastrophic. To me, this is it in a nutshell. A gasoline tank explosion would pale in comparison
On Wed, Jun 25, 2014 at 3:48 PM, Peter Eckhoff via EV <ev@lists.evdl.org> wrote: > AC Propulsion had a Power Point slide where they compared the efficiency > of various "fuels". Their standard was an EV with the equivalent of 50 > MPG. A similar vehicle, powered by hydrogen produced from reformatted > natural gas and fed into a fuel cell, was the equivalent of 30 mpg while > hydrogen produced by electrolysis was the equivalent of 12 mpg. > > There a number of technical problems with fuel cells: > 1) A fuel cell life expectancy was about 2,000 hours. Since my average > driving speed is 30 mpg, I would have to replace my fuel cell every 60K > miles. Therefore, a different fuel cell construction technique would have > to be used. > 2) A pack of battery or electrolytic capacitors or an ICE was needed to > aid in acceleration. Therefore, a faster way of transferring the "proton" > through the electrolyte is needed. Think of a proton as a person needed to > run through air as opposed through water or molasses. > 3) The storage of hydrogen to go 300 miles in a Toyota Camry needed 3 > specially carbon wound tanks where the internal pressures reached 700 bar. > A bar is 14.7 pounds per square inch. This equates to 5 tons per square > inch in a "2 ton" vehicle. Catastrophic failures would be catastrophic. > The hydrogen, therefore, needs to be stored in a molecular sponge where > the hydrogen freely flows in and out of storage without much energy > inducements. One real scheme required 800 degree Fahrenheit temperatures > to release the hydrogen from storage. > > Given the number of technical problems that need to be solved, I don't see > hydrogen fuel celled vehicles coming into common use anytime soon. > > > > _______________________________________________ > UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub > http://lists.evdl.org/listinfo.cgi/ev-evdl.org > For EV drag racing discussion, please use NEDRA (http://groups.yahoo.com/ > group/NEDRA) > > -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20140626/ed8d97fd/attachment.htm> _______________________________________________ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org For EV drag racing discussion, please use NEDRA (http://groups.yahoo.com/group/NEDRA)
