Adiabatic humidifier achieves close control

Condair, adiabatic humidification, humidity, relative humidity

Condair’s DL in-duct adiabatic humidifier offers the accuracy of humidity control normally only associated with steam humidifiers, but with the low-energy performance and evaporative-cooling benefit of a cold-water system. It also incorporates many anti-bacterial features that make it one of the most hygienic humidifiers available.

This hybrid humidifier combines spray and evaporative technologies to maximise moisture absorption and achieve humidity control of ±2% RH. A water-treatment system provides pure water to a grid of nozzles in the duct. The nozzles spray towards a ceramic droplet separator that has the dual action of preventing aerosols travelling down the duct and offering secondary evaporation through its porous surface. This increases the efficiency of the system, with 95% of the spray water evaporating during both processes.

The spray nozzles initially operate in stages to meet a required output and humidity demand, after which fully modulating control is achieved by increasing the water pressure to the nozzle to achieve accurate RH control.

The humidifier incorporates a reverse-osmosis water-treatment system to ensure that only pure water is introduced into the airstream. The pure water is also treated with a silver ionisation process that inhibits microbial growth and has a residual effect throughout the humidifier.

Flush and drain cycles prevent water remaining in the system to stagnate. Optional compressed-air drying guarantees moisture cannot remain in the water line. Optional hydrogen-peroxide disinfection can be incorporated into the system.

Being an adiabatic humidifier, evaporative cooling can be provided during the warmer months, with 1 kW of electrical power delivering over 680 kW of cooling.

For more information on this story, click here: April 2017, 161
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