Posted: Feb 14, 2020 12:19 pm
by Macdoc
Does seem a bit of something for nothing but then evaporative cooling is very powerful and you have constant solar input.

Something here is the key. The energy in the phase change seems to be involved

However, the solar-to-vapor conversion efficiency is below 100%, if the vaporization enthalpy is lost to the surrounding environment.8,27,28 Thus, harvesting and reusing the vaporization enthalpy is the key to enhance energy conversion efficiency.29

released heat flows to the next evaporating layer,


Here is the paper

Image ... ivAbstract