The purpose is to forcibly cause a dew condensation phenomenon and separate seawater into seawater with a high salt concentration and freshwater to produce a large amount of freshwater.

摘要

PROBLEM TO BE SOLVED: To provide a method for producing a large amount of fresh water, which separates sea water into sea water having a high salt concentration and fresh water. SOLUTION: Seawater (8) sprayed by a sprayer (15) inside a dome-shaped greenhouse (3) is heated by using external solar heat to be combined with water containing salt (NaCl). , Separated from fresh water (9), fresh water (9) has a light specific gravity and becomes water vapor (5), becomes water droplets (6) inside the vinyl house (3), condenses, and contains salt (Nacl). Since the water vapor has a heavy specific gravity, it falls on the surface of the surface layer (2) of the desert inside the vinyl house (3), and the water containing a large amount of the dropped salt (NaCl) is collected to obtain the sun-dried salt (17). [Selection diagram] FIG. 5