Because of the vacuum, the boiling point of the liquid is 8 than it would be under normal atmospheric pressure. This effect is known from the mountains: as the atmospheric pressure 9 is lower than in the valley, water boils at temperatures 10 below 100oC. The evaporated, non-saline water is condensed and runs down through a completely filled tube in a controlled manner. The gravity of this water column continuously produces the vacuum and so a vacuum pump is not needed. The reconcentrated5 brine runs down the tower surface 11 to absorb moisture from the air.
The concept is suitable for various water 12 . Single-person units and plants 13 water to entire hotels are conceivable, says Egner. Prototypes have been built for both system components air moisture absorption and vacuum evaporation and the research scientists have already 14 their interplay on a laboratory scale. In a further step the researchers intend to develop a demonstration 15 .
词汇:
autonomous adj.独立的 thermal adj.热的 permeate v.遍布 photovoltaic adj.光电的 hygroscopic n.吸湿的
infrastructure n.基础设施
brine n.盐水 interplay n.相互作用 saline adj.含盐的
注释:
1. Negev desert:内盖夫沙漠。
2. Isreal:以色列 3. as follows:如下
4. in which a vacuum prevails:水箱里是真空状态。Which 指代的是前半句的 tank。 Prevail 意为占上风。
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