Hi Fran, Plenty of evidence that LENR processes, if conditions are right, produce a lot of heat very quickly, so heat transfer is a major design requirement, thus, maximizing surface area is one way to achieve this requirement; much thinner layer coated on inner wall. 99% of interior volume empty.
Could be that even Rossi's designs are not optimal and that even more E/higher temps are possible. Foaming fixation probably would have the thermal conductivity of the 'foam', which doesn't seem like would be hi enough. -Mark From: Roarty, Francis X [mailto:[email protected]] Sent: Wednesday, May 29, 2013 1:54 PM To: [email protected] Subject: Re: [Vo]:Speculation about hotCat So, are we are suggesting instead a much thinner layer [.3g] spread over the entire inner surface of the reactor only? Or a foaming fixation that makes the nickel powder expand to fill the cavity ? From: MarkI-ZeroPoint [mailto:[email protected]] Sent: Wednesday, May 29, 2013 4:33 PM To: [email protected] Subject: RE: EXTERNAL: Re: [Vo]:Speculation about hotCat Jed asked: Question: assuming it really is 0.3 g, what is the likely volume? Nowhere near enough to fill the cylinder. *Why such a large cylinder?* - most likely would be to get the necessary surface area to adequately transfer the heat from interior to exterior. -mark From: Jed Rothwell [mailto:[email protected]] Sent: Wednesday, May 29, 2013 1:11 PM To: [email protected] Subject: Re: EXTERNAL: Re: [Vo]:Speculation about hotCat If the powder sinters, I suppose: That's good because it is what makes the powder stick to the wall. That's bad because it reduces surface area. This is what caused Arata's pure Pd black cells to stop working after a while. Takahashi said it was not the high temperature but rather the chemical action of hydrogen on the metal that caused the particles to stick together. I guess when they open the cell they have to scrape out the powder. Question: assuming it really is 0.3 g, what is the likely volume? Nowhere near enough to fill the cylinder. Why such a large cylinder? Maybe because that's what he has in stock. - Jed
