Can the idea be new? , is manufactured, the panel with 2 windows spaced 5mm apart, where the water is in direct contact. A kind of double glazing, but instead of the void between the 2 panes, it is water; an inlet at the bottom and an outlet at the top opposite side. The bottom glass would be painted black on the outside, to draw the maximum calorie, with insulation of course. What did you think of the system, if there are some who can do a simulation, for thermal mixtures (turbulence ....), I know there are some good computing!
