Recent research at the Device Research Lab in MIT's Mechanical Engineering Department points to the possible reduction in the energy cost of a unit volume of water produced by atmospheric water generators. By coating the water collection surface (for example, the evaporator coil in a mechanical dehumidifier) with nanostructured patterns the heat transfer coefficient is increased. Heat transfer efficiency can be increased 30%. The article, Jumping Droplets Help Heat Transfer, includes an interesting video.
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I have been researching and developing drinking-water-from-air technologies since 1984. As a physical geographer, I strive to contribute an accurate, scientific point-of-view to the field.