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Manufacturing industries have used desiccants in various applications for over 50 years, but have only recently begun to apply desiccant dehumidification systems (DDSs) to Heating, Ventilation, and Air-Conditioning (HVAC) applications.
Depending on climate and facility loading, a high percentage of a building’s cooling load can be latent (moisture) load. Conventional cooling equipment operates at low temperatures to cool the air to its dew point temperature, where dehumidification
via condensation on the coils begins. It may then be necessary to reheat the air to a comfortable temperature before it enters the occupied space. DDSs, by contrast, remove water from the air by using a desiccant, or chemical drying agent. DDSs offer several benefits when used in conjunction with air-conditioning systems.
Removing moisture from the air by desiccation decreases the amount of vapor- compression energy needed to dehumidify the air being supplied to the user, and increases the comfort level in the conditioned space. Desiccant systems also decrease moisture accumulation in ducts and around coils, inhibiting the growth of mold and
mildew.
Author: Nita Donde (dondeneeta@gmail.com) Version: Filesize: 165.19 Kb
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