Bruce H. Anderson
This looks like quite the achievement. But I'll tell ya, 154F is mighty toasty. Normally water heaters are set to around 120F to prevent scalding. Setting it at 140F increases costs, but also helps eliminate bacterium ( So some mixing valves would certainly be in order.
Jayna Sheats
Please just do one thing: remove the word "superconducting" from this article, or use a "sic" if it appears in source material. There are no superconductors listed, and if one had been discovered which works at 68C, I believe the world would have heard of it.
Thank you.
If as advertised, this application would be a giant leap for solar water heaters in areas with limited hours of daylight where a simple, highly insulated, storage tank could hold a sufficient quantity of hot water.
Hopefully this will not just another in the endless stream of processes 5+ years out that gets forgotten when the next shinny object appears.
Scam!! Sorry folks but not going to be more eff than a copper pipe. If they really wanted to increase eff an outside heat absorbing, non reflecting coating will be used. Nothing on the inside can help, only hurt, just a fact of physics.
Superconducting means complete loss of electric resistance something that doesn't happen at normal temperature and is certainly not a property of the paint as this article claims.
Something got lost in translation, supposedly this paint has superb heat conductivity.
Captain Obvious
Either their technical explanation suffered in the translation, or it's total baloney. And going from 40 to 76 degrees is not a temperature increase of 70%.
Show us a side by side test versus a conventional selective surface.
i wonder what the maximum temperature that the "ink" will withstand is? if it could withstand the inside of a cord wood or pellet stove; then the heat transfer would make them more efficient. i checked the approximate temp. at 1100 degrees F. silver melts at 1700 plus degrees and is very conductive as well. what if you could line the top inside of a stove with silver plates that connect through the iron/steel stove top to heat sinks made of aluminum? weld all 3 metals using the process that just came out on from ohio univ. blow air with fans across the heat sinks. more heat would be transmitted from the inside of the stove to outside. NOW, would the whole thing self-destruct from heat?
How it is related to superconductivity ?
Superconducting is the wrong term here. What they are working on is called a selective coating. Selective because of its behavior with regards to wavelength from incoming solar radiation and outgoing infrared losses. These coatings have existed as galvanic coatings and also vapor coatings since the eighties and can lead to very high stagnation (absorber) temperatures, around 200 deg C. This comes from the coating absorbing in the high 90% range while only emitting, or loosing some 10% or less. A painted black body will lose far more. Brand names for this are Sunstrip, Maxorb or Tinox but they are so obscure that one needs to google "absorber" or "solar" alongside to find them. Paints doing the same have been worked on for just as long, and I know of at least one product coming out of the university of Ljubljana/Slovenia but they did only make it to market on a few products in the early 1990's. And the paint was not very durable. Not sure what became of them. Really good someone is working on this approach again. Would be great to be able to buy selective solar paint at your local hardware store.
This article if full of contradictions and says very little.
Is this paint/ink applied as one coat or three? The article talks about three layers but implies it is in one application rather than three.
I assume it is applied to the outside of a copper pipe and then requires something else on top of it to darken the outermost surface which rather defeats the object of the paint in the first place.
I also question the temperatures - maybe they are correct for a particular place - It would have been better to give the full information including things like ambient temperature plotted over the time of the test, actual temperature of the outside surface of the pipe plotted over the time of the test and water temperature again plotted for the time of the test.
Without all the necessary data it is impossible to evaluate this product. The article reads like an over optimistic press release not a scientific discovery.