Desiccant Dehumidification

The quality of drugs, powders, dried food, confectionery and other hygroscopic materials, can only be maintained during production, if it is kept in contact with air at a low relative humidity.

Most hygroscopic materials require dew-points so low, that this can only be achieved using desiccant dehumidifiers.

When removing moisture from a building, whether new or as a result of water damage, the most effective way is to use desiccant dehumidification. Heating only transfers the moisture to another part of the building, and heating in combination with outdoor ventilation, requires high energy costs. With desiccant dehumidification the moisture is efficiently removed from the building.

Mould and fungus formation is prevented, if the surrounding air is kept below 70% RH. In many cases the use of a desiccant dehumidifier is ideal as can work in low temperatures that condensation type are unable to work in.

Corrosion rate of iron and steel will be dramatically reduced, if the air in contact with the surface is maintained below 50% RH – it is almost eliminated by reducing below 40% RH. Dehumidification is often more effective and less expensive, than conventional methods of preservation (eg: surface treatments).

Applications benefiting from dehumidification include bridges, power stations, ships (refit or lay-up), offshore constructions, aircraft and military vehicles.

The characteristics of electronic products can change at high relative humidity – failure rates also increase.

Unpleasant odours will be significantly reduced if the relative humidity is kept below 50% RH. For example, in sewage stations the odours can be controlled, by installing a dehumidifier.

Bacteria requires humidity to survive and multiply. The humidity required for bacteria to thrive is often found on hygroscopic materials. If the surrounding air is maintained below 50% RH, many types of bacteria will not find a suitable environment to live on.

Ice will not form on a surface if the air in contact with it has a dewpoint lower than the surface temperature. In cold stores ice formation damages product packaging, creates an unsafe working environment, and reduces the efficiency of cooling coils. By lowering the air’s dewpoint, it reduces or eliminates ice and frost formation.

When drying heat sensitive products, a controlled RH is essential if efficient drying times are to be maintained. In cooling processes, desiccant dehumidification can prevent condensation forming on the product.