What if it isn't an error? 1.7g of hydrogen if pressurised to 15bar is about 1.5L or 14mL of hydrogen per E-cat for 107 E-cats. 100 grams of nickel powder at 50% packing (I think this was stated nickel mass in original e-cat, though original e-cat was supposedly ~50mL) could take as little as 22mL to contain, with only 11mL of that being hydrogen. If the hydrogen supply line was only Ø2mm internal diameter then even 1 meter per ecat would only be another 3mL and the numbers would sort of add up, moreso if the reactors were heated up while the hydrogen was connected (eg 300°C = half mass).
There could have been significant unused hydrogen volume in the system in earlier tests - big tubes, large valves, some leakage etc, or the hydrogen pressure could have been significantly lower in the latest test. However I think most likely explanation is that the weight measurement process is just not that accurate, eg small amounts of dirt on bottle, hanging mass of tubes, imperfections in scales, hysteresis, changing temperature etc, to get this right requires close attention to detail in measurement, something Mr Rossi is famously bad at. I believe Rossi has lately claimed that there is only about 1kg of nickel powder per 1MW (astonishing if true) On 23 November 2011 14:57, Robert Leguillon <[email protected]>wrote: > There are obviously much, much bigger problems than the weight of the > hydrogen tank, but nevertheless: > ** > *September 7th:* > > "Hydrogen was filled after having checked that there was no pressure > inside the E-cat. The bottle was attached, opened, closed, and detached. > Weight hydrogen bottle: - > before filling: 13613.4 grams - > after filling: 13610.7 grams > Total loaded: 2.7 grams > Pressure H2 Bottle: 60 bar Reduced: 20 bar " > > *October 6th:* > "Hydrogen was filled after having checked that there was no pressure > inside the E-cat. The bottle was attached, opened, closed, and detached. > 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:* > "The Hydrogen tank has been weighted (sic) by means of a scale before and > after loading of the Hydrogen In the reactor. > Before the loading the weight measured is: 13604.5 kg > After the loading the weight measured is: 13602.8 kg > The Hydrogen tank pressure has been measured before and after the load: > Hydrogen pressure before the load: 55 BAR > Hydrogen pressure after the load: 55 BAR " > > Rossi later corrected himself. The 13604.5 kg and 13602.8 kg measurements > should have been 13604.5 g and 13602.8 g, respectively. > > So, one "Ottoman" E-Cat sometimes takes 2.7 g at 20 bar, and sometimes 1.5 > g at 15 bar. On the other hand, 107 of the "Ottoman E-Cats" only take 1.7 > g. > > But, Jed says that there is no reason to think that the numbers were > fabricated, so it must be fine. > > > > > Date: Wed, 23 Nov 2011 09:51:48 -0500 > > From: [email protected] > > To: [email protected] > > Subject: Re: [Vo]:hydrogen refill > > > > > Jouni Valkonen wrote: > > > > > This means with certainty that figures were fabricated and also in > > > rather poor manner. > > > > > > > There is no reason to think the figures are fabricated. > > > > Weighing the entire tank is an extremely inaccurate method. Almost > useless. > > > > > > > There was initially also wrong units used, that hydrogen quantity was > > > in kilogramms instead of gramms. > > > > > > > This was obviously a mistake. People often confuse units of measure. > > > > - Jed > > > > > ------------------------------ > Date: Wed, 23 Nov 2011 15:36:35 +0200 > Subject: Re: [Vo]:hydrogen refill > From: [email protected] > To: [email protected] > > That hydrogen bottle weight is a good point. It has been discussed > somewhere, but I do not remember was it here or elsewhere. > This means with certainty that figures were fabricated and also in rather > poor manner. There was initially also wrong units used, that hydrogen > quantity was in kilogramms instead of gramms. This kind of typo in units > implies that figures were just put there without much of thinking. > Certainly they were not measured! > —Jouni > On Nov 23, 2011 3:00 PM, "Gigi DiMarco" <[email protected]> wrote: > > > 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 > > > >
