Dry Room
Dry room builds a super low humidity level environment by desiccant dehumidifier. Products that are hygroscopic, sensitive to moisture, or need to be stored in a dry condition for a long period of time, must be kept dry during manufacture or storage. Dry rooms have been utilized to increase productivity by lithium battery manufacturers, pharmaceutical companies, automotives and selective other industries which have very low dew point requirements.
Dehumidification By Cooling vs. Desiccant Dehumidification
| Dehumidification by Cooling | Desiccant Dehumidification | |
|---|---|---|
| Principle | When the air passes through the cooling coils of an air-conditioning unit, water vapor in the air is condensed and precipitated. That causes moisture to being removed from the air naturally. | Chemical absorbent dehumidifiers supply dry air into the room by absorbing water vapor in the air and flushing out the moisture with regenerating air on the opposite side. |
| PRO |
|
|
| CON |
|
|
| Humidity Level |
|
|
When talking about humidity controlled dry rooms, it refers to desiccant dehumidification method using chemical absorbent dehumidifiers in general.
Dry Room Design
Just as heat load must be considered when designing a temperature controlled environment, humidity load calculation is one of the most important items when planning a drying room. The main sources of humidity load are from:
- People operating in the room
- Make-up air
- Air flowing in through airlocks for personnel entry/exit
- Moisture infiltrated by the building structure
Typical Dry Room System
