HUMIDITY CONTROL
is achievable with a resistive humidifier when using Reverse Osmosis water, another common application would be research laboratories. In both types of units, steam is introduced into the AHU or duct by stainless steel steam lances sized to ensure good evaporation of steam into the airflow. For those retrofit applications where space is tight, or where the AHU section needs to be kept to a minimum, a multisteam steam distribution manifold can be used to ensure the shortest evaporation distance is achieved - with these systems it is possible to evaporate 100kg/hr of steam in less than 500mm. Neptronic’s Multisteam HD system is a high efficiency steam distributor that ensures wasted energy is reduced by up to 85%. This includes steam supply consumption and wasted condensate generated by heat transfer from hot channel to air stream, the system eliminates condensation and prevents any wetting. For those in-room applications such as digital print rooms or small test labs, a simple fan head can be installed on top of the humidifier, or remotely, to disperse the steam directly into the space.
Where humidification is concerned, it is important to look at the bigger picture and
requirements… Is it a comfort application? do you need the humidity control for a manufacturing process? Is tight control, less than +/- 5% required? Is it a sterile application and / or a 24 hour operation? Is treated water available? All these factors and more are taken into account when selecting the correct technology to use in each specific application, and in many cases steam humidifiers are indeed the right choice and the best engineered solution for a project. As always, it is best to consult humidity control specialists to determine the best solution for each unique application.
not just the fact that a humidifier uses energy. Humidifying a building correctly could save a considerable amount of energy as stated above, far outweighing the energy consumption of a self generating steam humidifier.
Selection should be based on the application
So steam does not equate to inefficiency and energy guzzling, it is an excellent solution for many applications being versatile, easy and straightforward to install and very reliable. Steam humidifiers have certainly not had their day: humidification has all too often been ignored and misunderstood, and with the spotlight on the importance of healthy buildings, cost effective production creating good return on investment, reliability and maintaining accurate humidity control in laboratories and the like, whether it be Electrode Boiler or Resistive, steam humidifiers are definitely front runners when selecting the solution for many humidification applications.
www.acr-news.com
September 2020 37
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