i0522-324 Condair Humidifier Dehumifier_HVR 114 x 306mm_PRINT_READY.qxp_HVR
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Adiabatic Cold water humidifi ers can off er a lower maintenance and lower energy alternative to steam humidifi ers, and potentially provide the additional benefi t of evaporative cooling. Although this eff ect can be a double-edged sword. Rather than boiling water to create steam, water is simply sprayed or
evaporated into the air. For this process to occur, the air must be at a low enough humidity to absorb the moisture. To ensure the air can accept the moisture and off set the cooling eff ect, the air needs to be pre-heated before the humidifi er. If waste heat is available for this, adiabatic humidifi cation can be a very low energy alternative to electric humidifi ers. If additional pre-heating is needed, the energy consumed in the overall process is the same as an equivalent steam humidifi er. Adiabatic models include evaporative humidifi ers, where water is fed over an
evaporative media through which air passes. These can sit inside an air handling unit and incorporate features such as fl ush cycles and ultraviolet sterilisation to control microbial growth and the need for servicing to remove limescale. Because of these cycles, control is around ±10%RH. If closer control is needed in an AHU, hybrid humidifi ers combine the dual function of spray and evaporative humidifi cation. An array of low-pressure nozzles sprays water towards a ceramic droplet separator. Moisture is absorbed directly from the spray section and then again from the separator. Control of ±2%RH can be achieved but a slightly longer AHU section length is needed. For in-room adiabatic humidifi cation, high-pressure spray humidifi ers can be used. A pump station treats and pressurises the water before feeding it to a network of strategically placed nozzles across a room. These are great for large areas, like a print hall or factory. Often these areas can suff er from excess heat, so the evaporative cooling eff ect can be an additional benefi t. Finally, ultrasonic humidifi ers create a mist using rapidly oscillating discs
submerged in water. A fan blows the resultant mist into a duct or directly into a room. These types of systems can provide close control at around ±2%RH but do need to operate on demineralised water to avoid limescale formation on the discs. Ultrasonics humidifi ers tend to have a much smaller output at up to 25kg/h, but multiple systems can be operated as one for larger outputs. Whatever humidifi er is selected for a project, it is always important to
consider after-sales support. Every humidifi er will need to be maintained, so having a planned maintenance schedule in place will not only ensure optimum performance but also peace-of-mind that the system is operating hygienically throughout its lifetime. The Condair Group is the world’s leading specialist in humidity control and
evaporative cooling, with energy effi cient, hygienic and innovative technologies for commercial, industrial and heritage applications. Condair is represented in the UK by Condair Ltd, which off ers system design, manufacture, supply, installation, commissioning, maintenance and spares. You can fi nd out more by visiting the company’s website at
www.condair.co.uk.
NEED HUMIDITY CONTROL?
Condair offers the UK’s widest range of both humidifiers and dehumidifiers, provided with expert application knowledge and system design.
Humidifiers
Dehumidifiers
Design • Manufacture • Supply • Install Commissioning • Service • Spares
Contact us for free expert advice Tel: +44 (0)1903 850 200 Email:
uk.sales@
condair.com Web:
www.condair.co.uk
Humidification, Dehumidification and Evaporative Cooling
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