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> On Jul 28, 2014, at 10:52 PM, Marion Hakanson via EV <[email protected]> > wrote: > > I have a cousin who lives in Italy. They own a small Fiat van which runs on > both methane (compressed) and regular gasoline; Apparently it costs the > equivalent of $20 to fill the methane tank, and about $100 to fill the gas > tank (which they'll do if they're in the hinterlands and can't find a methane > station). > > If most H2 comes from methane (natural gas), why not just burn the methane > directly, instead of converting it multiple times (and losing something at > every step), so you can feed it to a fuel cell? For the same reason there is a ZEV mandate and you want a power plant to burn the natural gas and give you electricity to run your battery electric. Emissions. Remember, ZEV stands for zero emission vehicles. > > Regards, > > Marion > >> On 07/28/14 10:30 PM, Mike Nickerson via EV wrote: >> https://greet.es.anl.gov/ >> >> I have looked at it in the past. One thing to look at when someone reports >> results of the model: >> >> Everything is configurable in the model. Make sure the assumptions about >> generation and usage are well understood (either left to defaults or well >> documented). It is very easy to sway the outcome with changes in >> assumptions. >> >> In many cases, the changes can be realistic, but they need to be vetted. >> For example, running the model for Idaho, the electrical grid is more than >> 50% renewable and less than 30% coal. Those assumptions for New York would >> be very wrong. I believe the defaults are national averages. >> >> Mike >> >> >>> On July 28, 2014 7:33:57 PM MDT, Cor van de Water via EV >>> <[email protected]> wrote: >>> All data I have seen till now shows that emissions go up with the >>> indroduction of H2, due to the low efficiency well-to-wheels of >>> creating >>> H2. >>> So, it is considered not just a very difficult energy carrier, but also >>> inefficient, besides being very costly in roll out. >>> If you have data to the contrary, I am interested in vetting it (since >>> it is easy to mislead with cherry-picked info). My mind is open, I tend >>> to decide >>> based on data. Fan-boy? Not so much. >>> Got a link for that GREET model? >>> >>> Cor van de Water > _______________________________________________ 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)
