[单项选择]
Obtaining Drinking Water from Air Humidity
Not a plant to be seen,the desert ground is too dry.But the air contains water,and research scientists have found a
(51) of obtaining drinking water from air humidity.
“The process we have developed is based exclusively on renewable energy sources
(52) thermal solar collectors and photovoltaic(光电的)cells,
(53) makes this method completely energy autonomous.It will
(54) function in regions where there is no electrical infrastructure(基础设施),”says Siegfried Egner,head of the research team.The principle of the
(55) is as follows:hygroscopic(吸湿的)brine(盐水),-saline(含盐的)solution which absorbs moisture-runs down a tower shaped unit and absorbs water from the air.It is then sucked
(56) a tank a few meters off the ground in which a vacuum prevails.Energy from solar collectors
(57) up the brine,which is diluted by the water it has
(58) .
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