The May 2009 Issue of Engineered Systems has a good primer on Dehumidification entitled “Keys to Efficient Dehumidification” by Jeff Ihnen. Ray Maas has some experience, but I don’t have much familiarity with the topic. Fargo his neither too humid nor too dry. I found this article helpful. Jeff lays out the following Dehumidification Control Strategies:
- Only cool to the desired dew point when necessary
- Control cooling using variable volume to the maximum extent possible
- Keep the building positively pressurized
- Shut down outside air when the building is unoccupied
- Provide minimal temperature control with DOAS makeup air units
Once he reviews the pros and cons of each strategy, Jeff reviews two dehumidification system design strategies: dedicated outdoor air systems, and Precool and reheat ventilation air with energy recovery. We see more of the latter in our work.