Bry-Air Dehumidification Technical Resource Center
Designed to provide specific information on humidity, dehumidification processes, and steps necessary for selecting the appropriate dehumidifier for a specific application.

Applying Dehumidification Equipment

 The procedure for selecting a Bry-Air dehumidifier involves matching the application requirements to the most effective equipment size and configuration.

The project must be identified in terms of general requirements and also in specific detail to allow for proper equipment selection and application.

The control level must be understood to insure proper application of the equipment. First determine if the control requirements for temperature and humidity apply to a space condition or to a process air stream. Verify if the control level is to be held constant or if variable control points are required. In addition, it is important to identify the humidity level and control tolerance required of the application. If a condition is to be maintained year round, and humidity levels can be too low, consideration must be taken for adding humidity during periods of dry weather, typically in the winter. Once the control level is established, the location of the controlling device must be determined. The location can be within the controlled space, in the return duct (Bry-Air assumes this is equal to the space condition), or in the supply air for process applications.

In the case of process applications, the user may not be able to specifically target a control level. Keep in mind that many variables affect the drying process. Air flow rates, air distribution to the product, temperature, humidity, and product characteristics all have an effect on moisture removal rates. Product drying is not always a matter of removing surface moisture, adsorbent materials can be very difficult to establish drying rates for.

If drier air offers advantages to the customer due to inability to raise temperature on heat sensitive products, then dehumidification may be applicable. If the customer can effectively dry product in the winter, then the design requirements for the equipment have already been established.

Although Bry-Air cannot guarantee product drying rates based on theory, we can provide dehumidified air for the process based on our experience. If the user cannot identify the control level required, and is not willing to take a best guess approach, investment in a pilot system or an R&D product evaluation test may provide the necessary information to properly apply the dehumidification equipment.

Once control values have been established for an application, the load calculations for the equipment can be defined. The distinction between space loads and equipment loads must be established. Refer to the Bry-Air Engineering Manual for proper load calculations and equipment sizing. Properly identifying the application requirements will insure an effective application and produce a satisfied customer.

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