I found this article interesting for several reasons. I specialize in manufacturing large quantities of micro/nano-structured surfaces, mostly for decorative purposes. I made a sample run of that structure pictured about half way down the article, labeled "E". The customer wouldn't tell me what it's purpose was, but I am used to that so I didn't think anything more about it. Usually nothing comes of these technical sample runs.
A lot of things need to be done to reduce dependence on air condition and it doesn't need to be as fancy as sub-ambient radiative cooling. Think of all the energy wasted cooling black automobiles, for example. The roof of the average house is probably effectively 80% black. We are willing to sacrifice all kinds of things just because it might not be pretty or stylish. What if everyone just painted his roof magnesium oxide white? Not going to happen is it? An example from long ago in my past is rather dramatic. Decades ago, I had a traveling laser light show at state fairs. It was shown in a 70 ft. diameter inflatable dome. The dome was made of a metallic pigmented vinyl. It was sort of a silver-gray color, still quite sunlight absorptive. It could get quite hot in there, reducing business. My business partner and I had a rather spirited disagreement about getting this huge semi-trailer size air conditioning unit or using my solution to the problem, which was simply to put a metallized plastic film slip cover on the dome. His air-conditioning "expert" explained why my idea couldn't possibly work. I prevailed in the end, just because of the relative expense. The effect was remarkable. As the dome was place on bare lawn or paving, ground cooling took effect. Even on the hottest days, it could become a little cooler than was comfortable. This is rather remarkable considering that outside air was pumped in to support the dome structure. ‐‐‐‐‐‐‐ Original Message ‐‐‐‐‐‐‐ On Wednesday, January 12th, 2022 at 8:11 PM, H LV <hveeder...@gmail.com> wrote: > Terrestrial radiative cooling: Using the cold universe as a renewable and > sustainable energy source > > https://www.sciencemagazinedigital.org/sciencemagazine/13_november_2020/MobilePagedArticle.action?articleId=1637817#articleId1637817 > > A presentation of the paper on youtube > https://youtu.be/_O6x47BjYT4 > > Harry
