Harvesting free energy from the atmosphere  
Introduction & Principles
Principles of Open Space Cooling
Performance of Open Space Cooling
Operation Issues
Humidity Build-Up Control
> What's Humidity?
> How to prevent humidity build-up?
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We attempt to explain how humidity build-up can be prevented by using the three psychrometric charts below. They should be read in sequence from the first to the last.
n the example shown, air is cooled from Point A to Point B. The temperature is reduced and the relative humidity is increased.
As relative humidity (RH) is only a relative indication of the condition of the air in percentage term, it cannot be judged in any way that it is affecting the comfort of the workers or the condition of the product.
The concern of humidity build-up is not caused by the increase in relative humidity (RH).
This chart is identical to the one on the left. Except it shows the increase in absolute humidity (AH) when air is cooled from Point A to Point B.
In the example taken which is typical in SEA region, the increase in absolute humidity is 3.5 gm/kg of dry air. This is very small but it can keep building up if no form of control is in place.
If this moisture content is allowed to keep building up, it can affect workspace comfort or the product in a fully enclosed workspace.
A common effective and inexpensive method to control the humidity build-up is to install exhaust air system. Exhaust air system exhausts up to 80% of the supply air brought into the workspace thereby preventing any moisture content to build up.
In this example, the moisture content also known absolute humidity is kept under control at an increase of 3.5 gm/Kg of dry air
Below are some of the satisfied users whose products are considered by some as “sensitive” to humidity. These users have adopted open space cooling and are benefitting from their use without any adverse effect to their products.
Tin Cans Manufacturing Instant Noddle Production Tissue Paper Production
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