Avoid evaporation of water with oil?

[Christophe]

Jonule, Maloche is right ... He said NO ANIMAL OR VEGETABLE = IMPUTRESCIBLE

No need to argue about it ...

I added the photos in my previous post.

[jonule]

ah ok I just understood, yes I read too quickly: I explain for others like me (just in case): Maloche spoke specially of rot-proof animal oil, because there is putrescible animal oil (fat duck, for example) - I was serious about whether it was distilled;

in short :
Christophe, don't you have some kind of cover on your seat? normally it condenses on it and falls back to limit evaporation. if it's in a vacuum, there's no reason why it should evaporate?

because given the size of your installation ... of OUF by the way ! respect.

[Christophe]

Christophe, don't you have some kind of cover on your seat? normally it condenses on it and falls back to limit evaporation. if it's in a vacuum, there's no reason why it should evaporate?

Huh? Obviously there is a cover ... this is the concrete slab 20 cm thick that you see in the last photo. Below there is 40 cm of expanded polystyrene. For more photos on the optimization I did in October 2007: Solar-thermal / thermal-solar-buffer-optimization-and-repair-t4517.html

[Christophe]

Last summer I launched a comparative experiment, it is the LHM that works best, a year later 0 evaporation: science-and-technology / thermal-buffer-to-avoid-surface-evaporation-of-hot-water-with-oil-or-another-blocker-t16964.html