Extraction of water from air
First Claim
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1. A structure, adapted for extracting water from air, comprisingan absorbing part and a desorbing part, whereinsaid absorbing part comprises a surface having a thin layer of a flowing hygroscopic liquid in direct contact with air, the thin layer of hygroscopic liquid absorbing water vapor from air to form a hydrated solution;
- said desorbing part comprises a sandwich-like structure to separate water from the hygroscopic liquid in said hydrated solution,said sandwich-like structure including;
a) a heated sheet or layer, heated to a temperature above the environment'"'"'s temperature;
b) a space or layer filled with porous or filamentary material, allowing the flow and substantially even distribution of hydrated solution along the heated layer;
c) a layer of material, allowing passage of water but preventing passage of the hygroscopic liquid;
d) a cooled sheet or layer, the temperature of which is decreased relative to the temperature of the heated sheet or layer, allowing water to be removed in liquid form.
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Abstract
Water vapor is extracted from air in a process in which water vapor from large volumes of air is concentrated by absorption into a small volume of hygroscopic liquid (14), from which it is recovered by passage through a selective layer (12).
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Citations
19 Claims
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1. A structure, adapted for extracting water from air, comprising
an absorbing part and a desorbing part, wherein said absorbing part comprises a surface having a thin layer of a flowing hygroscopic liquid in direct contact with air, the thin layer of hygroscopic liquid absorbing water vapor from air to form a hydrated solution; -
said desorbing part comprises a sandwich-like structure to separate water from the hygroscopic liquid in said hydrated solution, said sandwich-like structure including; a) a heated sheet or layer, heated to a temperature above the environment'"'"'s temperature; b) a space or layer filled with porous or filamentary material, allowing the flow and substantially even distribution of hydrated solution along the heated layer; c) a layer of material, allowing passage of water but preventing passage of the hygroscopic liquid; d) a cooled sheet or layer, the temperature of which is decreased relative to the temperature of the heated sheet or layer, allowing water to be removed in liquid form. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
b) for the cultivation of plants; and c) soilless cultivation of plants.
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Specification