Dennis <[email protected]> wrote: I thought of it as a stainless steel cylinder (easier to machine) inside > the [wider] part of the copper tubing with water flowing around it. >
Yes, that is my understanding. In Fig. 4 you see a bulge in the copper pipe. Inside that bulge is a second, stainless steel chamber holding the powder. As far as anyone knows, there is no significant amount of copper in the walls of that chamber. Only trace amounts are allowed in stainless steel. The water flows through the copper pipe, around the inner chamber, and out the other side. It does not touch the powder inside the inner chamber. I do not think there is any mechanism that would allow a significant, measurable amount of copper to migrate from the pipes through the stainless steel into the powder. Given the level of heat the thing is producing, that has to be fairly thick, heavy stainless steel. It isn't like aluminum foil. I think Rossi has earned a measure of technical credibility. If he says the inner chamber is made of stainless steel, I am inclined to believe him. - Jed
