Compression is not “an issue”. It’s just something that’s a factor.
- Mark Sent from my Fuel Cell powered iPhone > On Aug 15, 2021, at 1:13 PM, Peri Hartman via EV <[email protected]> wrote: > > The compression issue is another reason why excess wind and solar energy > should be converted to hydrogen for grid backup rather than vehicles. It > doesn't need to be compressed. This technique has been used for natural gas > for decades in some places, where there's a giant inflatable tank that's more > or less at atmospheric pressure. > > Peri > > << Annoyed by leaf blowers ? https://quietcleanseattle.org/ >> > > ------ Original Message ------ > From: "Robert Bruninga via EV" <[email protected]> > To: "Electric Vehicle Discussion List" <[email protected]> > Cc: "Robert Bruninga" <[email protected]> > Sent: 15-Aug-21 13:02:45 > Subject: Re: [EVDL] hydrogen isn't green, after all > >> But then there is still the 30% loss in inefficiency in all the heat loss in >> compressing the hydrogen into tanks. (and hoping it wont explode). >> Bob >> >>> On Sun, Aug 15, 2021 at 3:39 PM Michael Ross via EV <[email protected]> >>> wrote: >>> >>> From the WIKI: >>> "Considering the industrial production of hydrogen, and using current best >>> processes for water electrolysis (PEM or alkaline electrolysis) which have >>> an effective electrical efficiency of 70–80%" >>> I actually thought 70% was as good as it gets, but they think in another >>> 10 years it might be in the upper 90%'s. >>> >>> I recall that the combustion of hydrogen was also pretty lossy. SO a lot of >>> inefficiency coming and going with H. I will try to find where I got that >>> idea and write back. The discussion was to the effect that combining O2 and >>> H2 could never be better than some ceiling %. >>> >>> On Sun, Aug 15, 2021 at 3:20 PM Mark Abramowitz via EV <[email protected]> >>> wrote: >>> >>> > Gee, a lot of incorrect stuff to reply to. >>> > _______________________________________________ Address messages to [email protected] No other addresses in TO and CC fields UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub ARCHIVE: http://www.evdl.org/archive/ LIST INFO: http://lists.evdl.org/listinfo.cgi/ev-evdl.org
