I'll top-post this reply to make it easier to read: What I meant is that the device does not look at all convincing, this release could be Rossi's way of getting some early feedback on the types of objection that critics are likely to have when he unveils it for his next set of demonstrations, so I am perhaps doing him that small service. :)
Hydrides release hydrogen at higher and higher pressures as the temperature increases, increasing temperature from 500°C to 1200°C could increase pressure by an order of magnitude. http://upload.wikimedia.org/wikipedia/commons/7/7c/Metal_hydride_hydrogen.storage.graph.gif http://www.rebresearch.com/sorbers.html pressure would be increasing massively as your temperature increased - a very dangerous situation for a reactor that is rapidly losing strength. And this would be quite scary in terms of the lack of control over the reaction that it would give (depending on what the influence of pressure is upon the reaction). He apparently has no way of measuring or releasing pressure - again very dangerous, and he would be lucky not to have a dangerous accident if he was really using such a system. Even using only a small amount of hydride (not running at pressure equilibrium) you would then have a pretty dangerous situation with pressure increasing as metal strength decreased. at 1200°C all superalloys are extremely weak. And the rate of hydrogen leakage would also increase massively at such high temperatures - you would need some way to compensate for that leakage. And then there is the added problem of how to ensure that the source of your heat energy is not leaking and reacting hydrogen (they store a lot of energy). It makes no difference what the temperature is under the skin - like the earth's core is thousands of degrees, but the surface is only about 280K on average, and it is the surface that radiates (or convects) away the heat. Though the hole you point to does look to be more like 700-800°C it is only a tiny area, and will be radiating very little energy. Almost the whole surface is barely starting to have a hint of red - so the temperature looks to be under 500°C. His stories about not being able to get close because it was too hot sounds like rubbish, you can easily put your hands in front of a bar heater or radiant gas heater operating at the power levels he is claiming, and 13kW on the surface of a 1.2m radius sphere is only about the same heat flux as the sun has on a cloudless day. His statement about heat being radiated by inner walls sounds like he doesn't understand basic radiative physics, as all that energy must leave through the small holes at the end, those holes are the only area that count (in terms of the heat energy from the inner tube). On 11 August 2012 03:52, Akira Shirakawa <shirakawa.ak...@gmail.com> wrote: > A technical analysis at last! > > > On 2012-08-11 04:05, Robert Lynn wrote: > >> Looks like Rossi has invented a tube furnace,or bought one and coated it >> in a refractory. >> > > Yep, a very crude device. Makes you wonder about others', or maybe the > opposite depending on your point of view. > > > Not a very convincing picture. No visible connections for gas or other >> fluids, no temperature sensors, just a couple of electrical supplies. >> Typically shoddy Rossi work, and again I ask myself is this deliberate >> to create more uncertainty, or simply lazy? >> > > This was posted by a *very* reliable inside source (probably one of > Rossi's technical advisors - he has direct, first hand access to his > devices, reports having disassembled them and performed measurements > personally, including those of this high temperature E-Cat core) who never > deliberately gave misinformation to his public. Although there's still the > chance this could have happened, I think it's quite small. For what it's > worth, Daniele Passerini confirms too the authenticity of this photo, > having already seen similar ones privately some time ago. But you might > probably not consider him a reliable source. > > I thought it was a known fact that Rossi now uses hydrides instead of > Hydrogen gas. Maybe my impression was wrong? > > As for other [cooling] fluids, this is a bare reactor. Do you remember the > first public Defkalion GT testing protocol? They were supposed to make the > invited scientists test stripped down reactors, with no cooling other than > optionally blown air. Same deal here, except there was probably no cooling > performed when this photo was taken. > > Temperatures, as the description reports, in this case are measured > through laser thermometers and a thermal camera. So the visible electrical > connections are all is needed to make this work. > > Again, it's a very crude device. But if it's just supposed to make a lot > of uncontrolled heat, it could be more than enough for the job. > > > Also unclear how this heat is being radiated away when there is only a >> small hole for the heat to leave through, and from the colour it doesn't >> look like it is over 1000°C (though photos can be deceptive the rest of >> the environment around the picture looks quite normal). From colour the >> outer surface is quite obviously relatively cool, not 800°C - looks more >> like <500°C. (I used to work with engine exhausts that ran in 500-1000°C >> range, so have some experience of heat-colour, eg check out what looks >> like a 950°C max exhaust: >> http://www.strangecosmos.com/**content/item/177605.html<http://www.strangecosmos.com/content/item/177605.html> >> ) >> > > If you check this image, you can see that an arrow points to an area where > the clay-like material is in part missing, and the underlying surface from > the outer cylinder is literally red hot. This might be of help in assessing > the outer surface temperature: > > http://i.imgur.com/5IOPM.jpg > > [...] > > There are not many metals that will withstand operating at such high >> temperatures, and not safely when exposed to hydrogen at pressure. Not >> pressure sealing sounds like rubbish, refractory sealants wont seal >> metals at high temp due to differential thermal expansion. >> > > I'm not sure there's hydrogen at pressure anymore as I previously > mentioned. If Rossi is now using hydrides in the active material, there > might be no need anymore for pressure sealing or high pressure resistance > for the reactor walls (very important since working temperatures are quite > high). But I'm not an expert in this area so I shouldn't really write much > about it. > > > The mention of gas heating makes me very suspicious that this will be >> his next method for hiding or confusing the results that he produces in >> yet another unconvincing demo. >> > > Rossi is basically saying that excess heat in his new E-Cat can be > triggered by heat, something which Francesco Celani already experienced > with his treated Ni-Cu-Mn wires, and documented in his latest report: > > http://www.22passi.it/**downloads/PresICCF17_NewA3A.**pdf<http://www.22passi.it/downloads/PresICCF17_NewA3A.pdf> > > More in detail, he mentions that "the reaction, apart some temperature > threshold, has a positive feedback with increasing temperature". His > demonstrative reactor is probably more similar to Rossi's E-Cat than it > would seem. > > Cheers, > S.A. > >
