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Dehumidifiers that work according to the absorption principle are well-suited for high humidity at low temperatures. They are often used in industry to achieve humidity levels below 35%. Because of the absence of compressor parts, desiccant dehumidifiers are often lighter and quieter than compressor dehumidifiers.
DOAS Diagram. Moisture Removal Efficiency (MRE) is a measure of the energy efficiency of any dehumidification process. Moisture removal efficiency is the water vapor removed from air at a defined inlet air temperature and humidity, divided by the total energy consumed by the dehumidification equipment during the same time period, including all fan and pump energy needed to move air and fluids ...
One measure of desiccant efficiency is the ratio (or percentage) of water storable in the desiccant relative to the mass of desiccant. Another measure is the residual relative humidity of the air or other fluid being dried. For drying gases, a desiccant's performance can be precisely described by the dew point of the dried product. [1]
It was developed in 1999 by Charles Cressy as an alternative to conventional refrigerant and desiccant dehumidifier drying techniques. In July 2013 British Standards PAS 64 "Mitigation and recovery of water damaged buildings - Code of practice" was published recognising and including descriptions of the process within the document.
The desiccant absorbs moisture from the air leaving the cold surface, releasing heat and drying the air, which can be used in a process requiring dry air. The desiccant is then dried by an air stream at a lower relative humidity, where the desiccant gives up its moisture by evaporation, increasing the air's relative humidity and cooling it ...
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