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Add: No.17 Tangmei Road, Yuhang Economic Development Zone, Yuhang District, Hangzhou, Zhejiang, China

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How Desiccant Dehumidifiers Work
Aug 05, 2018

Desiccant dehumidifiers ignore complicating factors like dew point temperature because they operate using a completely different principle. Specifically, desiccants attract water on a chemical level, and can do so through various means. However, the vast majority of desiccant dehumidifiers use silica gel, which cranks up the rate of condensation by greatly increasing the available surface area of water to adhere to and condense. Here’s a quick look at how a desiccant dehumidifier works:

    1. Humid area is drawn into the desiccant dehumidifier, and pushed across a rotating disc impregnated with silica gel. The disc resembles a bundle of straws through which air can flow, and the silica gel is lined along the inside of these tubes.
    2. The silica gel is filled with nano-sized pores, increasing the surface area of the gel exponentially. In fact, a single teaspoon of silica gel has so many pores that its surface area is similar to the surface area of a football field.
    3. With so much area to condense on, the kinetic energy threshold separating vapor molecules and condensed water molecules dips greatly, meaning vapor molecules exhibiting less energy will be much more likely to condense.
    4. As water collects on the disc, a portion of the air drawn into the dehumidifier is heated and used to recharge the condensation so that it vaporizes again. This air is ducted to the exterior to deposit the water outside and is returned to the building. The remaining dry air is shunted back into the room.

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