Remarkable Daytime Sub-ambient Radiative Cooling in BaSO4 Nanoparticle Films and Paints — mentioned by the8472

Fri, 16 Apr 2021 17:16:17 GMT

Ah, great. Paper with an emissivity graph: https://arxiv.org/abs/2011.01161 Without that you can't really judge the news article.

Paper and discussion history. A mention is not an endorsement.

Remarkable Daytime Sub-ambient Radiative Cooling in BaSO4 Nanoparticle Films and Paints — mentioned by adrian_b

Fri, 16 Apr 2021 15:11:09 GMT

Now I have read an earlier version of this paper, which is freely available: https://arxiv.org/abs/2011.01161 The main points are: 1. The more common white pigment titanium white is not good for cooling something exposed to sun, because it strongly absorbs ultraviolet light. (Besides generating heat, this ultraviolet absorption also causes photo-chemical reactions that degrade in time the organic paint binders.) 2. So they have chosen barium sulfate, which reflects not only visible light, but also ultraviolet and near infrared. 3. Barium sulfate not only reflects solar light, but it also…

Paper and discussion history. A mention is not an endorsement.

Remarkable Daytime Sub-ambient Radiative Cooling in BaSO4 Nanoparticle Films and Paints · HackerPapers discussions

Remarkable Daytime Sub-ambient Radiative Cooling in BaSO4 Nanoparticle Films and Paints — mentioned by the8472

Remarkable Daytime Sub-ambient Radiative Cooling in BaSO4 Nanoparticle Films and Paints — mentioned by adrian_b