I imagined something similar for a very specific case.
It involved covering a large, slightly sloping surface with an asphalt mixed with rock that strongly absorbs solar radiation (black rock).
The salt water would be poured over the high maniene ridge so that the thickness of the flow is just sufficient to allow the water to reach a temperature of +/- 50 ° C.
Glass slabs would be placed on top, far enough away so that they are spared from salt deposits and so that they can be cleaned. We would also enclose the edges with walls in order to isolate the volume thus created.
Suction hoods and air inlets would then be judiciously placed so that this air is loaded with humidity. This is a critical point, the efficiency of the system is directly linked to the humidity level present in the outside air: very dry air allows high efficiency.
Once the humid air has been pumped, it is sent into underground conduits to a depth such that the temperature reigning there allows this air to reach the dew point. The pressure in these pipes is therefore also part of the equation.
- an external energy source for pumping (wind turbines)
- a desert area with a high rate of sunshine and very dry air (laying of pipes from the sea over a long distance)
- soils with a stable low temperature at shallow depth (average day / night).
Also, as it is necessary to evacuate the water strongly concentrated in salt, it must be pumped back to evacuate it towards the sea and, if necessary, turbinate it in order to recover energy (salt water of higher density than the original! )
Here it is!