Here is a similar investigation using parabolic and elliptical reflectors and also a simple reflector with flat sides sloping at 45 degrees. With the parabolic reflector they managed to a cool an emitter 20 degrees below ambient temperature at night. The elliptical reflector was almost as good.
https://youtu.be/7qZodSfFQCM Harry On Fri., Jan. 21, 2022, 1:42 p.m. Jones Beene, <jone...@pacbell.net> wrote: > Of interest: > > > https://www.researchgate.net/publication/262806145_Blue_Sky_Cooling_for_Parabolic_Trough_Plants > >
