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Description
The distinctive features of the Borealis HDR series of desiccant rotor dehumidifiers are as follows:
- Multiple selection and customisation options for each case and client.
- Structure made with anodised aluminium profiles with thermal bridge break and removable sandwich-type closure panels composed of two lacquered galvanised steel sheets with PIR thermo-acoustic insulation core, 45 mm thick as standard. Interior of the panels lacquered. Stainless steel condensate tray.
- Plug-fan fans as standard in both the process and reactivation air streams.
- Reactivation with steam, hot water, electric, or heat pump coil.
- Optional pre-cooling and/or post-cooling coils in the production circuit, either hydronic or direct expansion type.
- G4 filtration as standard in both air circuits. Optionally, higher efficiency filters (M-type, F-type, etc.).
- Complete electrical control and protection panel.
- Electronic regulation through a freely programmable microprocessor. Remote or integrated control with a large illuminated LCD display, setpoint selectors, operation modes, and calendar. Historical data storage. Web and MODBUS connection as standard. Custom programming optionally available.
APPLICATION AREAS
Desiccant rotor dehumidifiers are more commonly used in applications where refrigeration equipment cannot be employed, mainly because the required temperature and humidity conditions do not allow for this condensation-based dehumidification system, especially in low temperatures where ice accumulation occurs on refrigeration coils, leading to process interruption.
Desiccant rotors are commonly used in the manufacturing, agri-food, or chemical industries, including pharmaceuticals, to prevent corrosion, protect against condensation (and resulting ice formation in cold rooms), prevent mould or fungus formation, treat sick building syndrome, perform various industrial processes requiring humidity control, treat air in clean rooms, or manage food production processes like sweets and ice cream manufacturing, etc.
In general, they are used for processes that require effective drying and where refrigeration-based dehumidification is not suitable.
TECHNOLOGY PRINCIPLES
- Desiccant dehumidifiers work by adsorption rather than cooling to remove moisture from the air.
- Adsorption involves capturing moisture on the surface of a solid or liquid, called a sorbent.
- Desiccant rotor dehumidifiers use sorbents like silica gel or molecular sieves on a honeycomb-shaped circular structure.
- Many solid materials can attract moisture, but commercial desiccants have much higher absorption capacity, up to 10,000% of their dry weight.
- In desiccant rotor dehumidifiers, there are two independent airflows:
- Process air: enters laden with moisture and exits dry.
- Reactivation air: is heated to regenerate the silica gel, releasing moisture from the rotor.
- The process air conditions the desired space, while the reactivation air is expelled outside the treatment area.
