Filter Dryer HVAC Systems

Moisture absorption

A dryer is normally used to get rid of all the water molecules and molecules from the system. The supply of water in these structures might also be leakages, trapped water, water from motor etc., when existing in these systems, moisture or water vapour can motive extreme injury to the system. They reason blockages and can even reason corrosion, put on and tear of steel components of the system. Due to some reactions, this water may result in acid formation.

As a way to guard the device against all these issues, the extent of water contained in the gadget needs to be minimized. Desiccants like molecular sieves &; activated alumina can be used to dehumidify the system.

Cubic crystals that adsorb molecules on the foundation of polarity and dimension of the molecules are known as molecular sieves. They are artificial zeolites. Several pores which are incomparable measurements are existing in them. So, solely positive molecules of some sizes can be adsorbed via these pores. Molecules like water should be surpassed via these pores whilst giant-sized molecules like lubricants, refrigerants etc., couldn’t be passed. Molecular sieves floor includes fine cations that should adsorb and maintain polarized particles like water. As a result of this separation of water molecules from the lubricants, the risk of acid formation can be eliminated.

Not a tremendously crystalline material, activated alumina is shaped through heating aluminium oxide aka Al2O3 at excessive temperature. This is handy in countless pore sizes. As a result of various pore sizes, they have a gain of adsorbing many molecules like lubricants, acid molecules, refrigerants etc.

Another desiccant used in these air dryers is silica gel. They are additionally a non-crystalline material. They are the oldest desiccants used and today’s air dryers do no longer use them.

Selection of a desiccant from these three requires consideration of positive facts. In every function, the necessities would be different. Capacity to incorporate water, ability to adsorb acids, compatibility with refrigerants, lubricants used, etc., are the vital elements viewed here.

Among them, molecular sieve has the very best water retention capacity. The molecular sieve & water shares a sturdy bond. As a result, the machine can be covered from the risks of corrosion, acid formation, harm etc.

Activated alumina has various pore sizes and consequently can be used in eliminating molecules with large sizes. For water adsorption, molecular sieves are nice whilst as in the elimination of acid molecules, activated alumina is the exceptional desiccant.

The energy of desiccants or their potential to face up to and overcome vibrations (attrition) barring any breakages is every other essential thing to be viewed for the desiccant selection.

The desiccant molecules when comes into contact with every different due to vibrations and shaking in the surface, may motive damage. The bodily electricity to withstand this is essential whilst choosing the kind of desiccant used in the air dryer.