This part doesn't make sense to me. "But here is the exciting thing..." https://youtu.be/Ay6ckBojc_0?t=219
Harry On Wed, May 5, 2021 at 10:49 AM Jürg Wyttenbach <[email protected]> wrote: > All bodies do radiate away heat. During day light time solar radiation > more than compensates the heat loss. > > But a highly reflective layer almost (96-97%)stops this compensation. > > IR radiation is just a function of surface temperature and the air > interface. > > Just a small riddle: What happens if you use this paste as sun-cream and > go for a daylight tropical desert walk? > > J.W. > On 05.05.2021 16:31, H LV wrote: > > This video talks about a new ultra white paint which the inventors claim > could dramatically reduce air conditioning costs. > > https://www.youtube.com/watch?v=Ay6ckBojc_0 > see also press release: > > https://www.purdue.edu/newsroom/releases/2021/Q2/the-whitest-paint-is-here-and-its-the-coolest.-literally..html > > However, the explanation doesn't make sense to me. If the new paint is so > good at reflecting sunlight in the visible as well as the infrared and > ultraviolet regions how can it facilitate indoor cooling? They are claiming > that it can transmit infrared radiation but isn't a good reflector of > radiation also a bad transmitter of radiation? > > Harry > > > -- > Jürg Wyttenbach > Bifangstr. 22 > 8910 Affoltern am Albis > > +41 44 760 14 18 > +41 79 246 36 06 > >
