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首页> 外文期刊>The international journal on hydropower & dams >Graphite structure generates steam directly from sunlight
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Graphite structure generates steam directly from sunlight

机译：石墨结构直接从阳光中产生蒸汽

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摘要

A new form of graphite developed by the Massachusetts Institute of Technology (MIT), USA, can convert water directly into steam using direct solar energy. The material is essentially a layer of graphite flakes, deposited on a base of carbon foam; this is a porous, insulating compound which floats on water. When sunlight strikes the structure's surface, it cre-ates a hotspot in the graphite, drawing water up through the material's pores, where it evaporates as steam. The compound's bottom layer contains pockets of air to keep the foam afloat, and acts as an insulator, preventing heat from escaping to the underlying liquid. The foam also contains very small pores which allow water to creep up through the structure via capillary action. The structure works much like a sponge that, when placed in water on a hot, sunny day continuously absorbs and evaporates liquid (see also H&D Issue One, 2008).
机译：美国麻省理工学院（MIT）开发的一种新型石墨可以使用直接太阳能将水直接转化为蒸汽。该材料基本上是一层石墨薄片，沉积在碳泡沫基体上；这是一种漂浮在水上的多孔绝缘化合物。当阳光照射到结构的表面时，它会在石墨中创建一个热点，将水从材料的孔中吸出，并在其中蒸发为蒸汽。该化合物的底层包含空气囊，以保持泡沫漂浮，并充当绝缘体，防止热量散逸到下面的液体中。泡沫还包含非常小的孔，这些孔允许水通过毛细作用向上爬过结构。该结构的工作原理就像海绵，在炎热的晴天将其放在水中时，它会不断吸收和蒸发液体（另请参见H＆D Issue One，2008）。

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