Was wondering if anyone knew the amount of heat that could be expected, if any of signifcance, from a small 1/4" teflon edge rubbing against copper. This is of course while being submerged in water.
Reason I ask is I mentioned the idea of a "scraper" of sorts which would essentially wipe away most of the boundary layer and keep a "pulsating supply of new/cool water to the copper. I was told that someone else had the idea too but to no real results. I had an idea over the weekend of how to do this without any external mechanisms and with a frequebcy of "wiping" that increases with flow rate. That probably gives away that idea. Whether it's any good or not, I can't say. But it looks good in drawings