Hi Mark, I will consider such a drawing. However, the present diagram is not geometrically correct - the internal unit is rotated in the cross-section so as to highlight the fins. What is needed is a proper drawing from the pictures. I just don't know what useful insight would be obtained from spending the time on that.
I think it would be more useful to draw a speculative cross-section of the headers of the heat exchanger to have a proper discussion of the heat flow. It is my contention, that because of the high secondary flow, that the heat from even primary hot water would not cause a significant error temperature rise in Tout. This is because the heat conducted through the brass from the primary input would have to travel along the brass shell past the flowing secondary water for at least an inch through a cross-section of about 1/4". The secondary water tube in that section can be considered nearly a perfect sink because of the high flow, and almost all of the heat from the primary will terminate in that water - which is where it is supposed to terminate anyway. Regards, Bob Higgins -----Original Message----- From: Mark Iverson-ZeroPoint [mailto:zeropo...@charter.net] Sent: Thursday, October 13, 2011 4:53 PM To: vortex-l@eskimo.com Subject: RE: [Vo]:Analysis by Bob Higgins Hi Bob, I think all us Vorts appreciate the time you've put into the analyses and diagrams... I know you say the diagram is only meant to help visualize things, but from what I've read and seen, it seems pretty accurate; not sure about the pressure limiter. I think the water inlet is on the bottom... I'd like to make reference to the assembly which basically 'sandwiches' the reactor core between identical layers of shielding and heat spreaders, both on top and underneath. We never see this assembly removed, so the only way we know what's underneath the top spreader is from comments made by Rossi; and what you've drawn is the image that I had in mind. I'd like to suggest that you look again at all available pics or videos which have the lid off, and look at the clearance between the spreader and the 4 walls. It sure seems to me that there is a consistent ~3cm gap between the heat spreader and the walls, which would make it rectangular and not the square 30cm x 30cm dimensions that Mats Lewan has reported. One request: could you add some measurement dimensions (in cm) to the diagram? Much appreciate your efforts! -Mark
