28th test: 1.7grams is 21 litres of H2 at 1 bar and 25°C (gas constant R=4120 J/kg/K). At 15 bar (assuming same as Oct 6th test) it is about 1.5 litres. If there were (from memory) 107 e-cats in the 1MW plant then that means about 15ml of hydrogen container at 15bar per unit, including all hydrogen pipes etc. Seems very unlikely that it would be so little, but maybe the pressure was a lot lower - only a few bar?
On 23 November 2011 12:38, Gigi DiMarco <gdmgdms...@gmail.com> wrote: > I don't know if it was already reported but I found some oddies in the > hydrogen consumption > > October 6th test, from Lewan's report > > Weight hydrogen bottle: > - before filling: 13606.4 grams > - after filling: 13604.9 grams > Total loaded: 1.5 grams > Pressure H2 Bottle: 55 bar Reduced: 15 bar > > October 28th test, from Fioravanti/Rossi's report > > - before filling: 13604.5 grams > - after filling: 13602.8 grams > Total loaded: 1.7 grams > > We can derive the following conclusions: > > - no intermediate experiments/tests have been made since 0.4 grams is > likely to be a leakage, unless a different vessel was used > > - almost same quantity of Hydrogen is needed for either 1 or 107 fat-cat > systems > > OR > > - Fioravanti & Rossi report misleading figures > > Since Rossi in his blog says that 18 kg are needed in 6 months to charge > the 1MW plant, 100 grams are needed in 1 day. > > > Giancarlo > >
