4 ms·
> Notably, when exposed to 600 W m−2 irradiation for 600 s, the equilibrium temperature of the photo-thermochromic elastic fiber rises impressively from the amb
by viraptor 2y ago
> Notably, when exposed to 600 W m−2 irradiation for 600 s, the equilibrium temperature of the photo-thermochromic elastic fiber rises impressively from the ambient 20.0 °C to 53.5 °C.
Does anyone know what's the expected raise from that much energy in basic cotton for comparison?
- s0rce 2y agoI naively tried to calculate in a closed system consisting of cotton canvas but I got a temperature rise of 600K. Oh well, I guess heat loss from the system is important. 600 W/m2 / (1.34 kJ/(kg K) * 390 g/m2) * 600s
- hammock 2y agoIf we assume a clothes dryer is 3000W, how long does it take a cotton shirt to get heated from 20c to 53c? A few minutes? So perhaps this fabric heats up 3-5x faster
- viraptor 2y agoDifferent kind of heat transfer. Clothes in the dryer match the temperature of the heated air around them. This paper is about radiated heat captured by the cloth.
- hammock 2y agoOk stick your shirtsleeve in a toaster. 1000W? How many minutes until it’s 125F. Same answer?
- viraptor 2y agoIf I understand the quote from the paper, it's not quite the same. They're putting a controlled amount of irritation over a long time on the cloth. It seems like the change is a higher temperature than other fabrics, not necessarily faster (maybe, but not noted)