| Domestic Dehumidification-Air dehumidification |
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The hygroscopic and deliquescent properties of calcium chloride are known since a long time.
It is for these properties that CASO® Flakes is used as drying agent for domestic applications.
When absorbing the humidity of the air, CASO® Flakes transforms into a liquid brine (deliquescence); afterwards, the residual humidity is captured by the brine till reaching a concentration value corresponding to that of the relative humidity (Ur) and of the temperature of the air in that precise instant. From this moment (equilibrium) onwards, absorption and evaporation of the humidity from the brine will never happen.
Wet air differs from dry air for the presence of the vapor of water, whose quantity cannot exceed a saturation limit, Us, (dependent of temperature); once this value limit is exceeded, the vapor of water in excess condenses.
The absorbed humidity by a given quantity of CASO® Flakes depends on the surface area of the CASO® Flakes exposed to the air, the quantity of the air that circulates over the CASO® Flakes and the water vapor pressure of the air compared with that of the CASO® Flakes.
The graph below shows the quantity of water absorbed per kg of CASO® Flakes and the concentration of the final solutions at different relative humidities.
The graph shows that in presence of a relative humidity of 40% and at a temperature of 25°C, 1 kg of water is absorbed by 1 kg of CASO® Flakes. In presence of a relative humidity of 95 %, a quantity of nearly 1 kg of CASO® Flakes absorbs approximately 14 kg of water.
Thanks to this ability of absorbing humidity, CASO Calcium Chloride is largely used in areas such as the industry, construction and trade.
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