DISCUSSION

 

2.find the schematic of a modern air –conditioning system with advanced air threatment proseses and explain the function of the main devices

 

Air-conditioning units that only cool the air are only addressing part of the equation. Air filtration to remove and neutralise bacteria is just as important, as STUART MADDOCK explains.

Air filtration is essentially the insurance of a higher quality of air in indoor spaces. It is the procedure in which the harmful aspects of the atmosphere, such as bacteria, are withheld and the non harmful aspects are released.

Bacteria and viruses are not easy to remove from the air, due to their miniscule size and the fact that they reproduce so quickly.

The usual size of bacteria is smaller than that of a pin head so filtration is difficult through normal methods. The speed at which they reproduce creates danger. and as so much of our lives is in an indoor atmosphere it is obvious that the air has to be filtered.

Filtration methods

There are various methods of filtration; these vary depending on size, efficiency, and cost. These can be divided into various categories. Usually the filter is inactive and consists of paper or cloth that is pleated and disposable, or a plastic type mesh that is washable.

Active filters are smaller than inactive types but have better efficiency. These air filters generally use electric fields to attract and then kill bacteria. The plasma filter is based on the technology of electric attraction.

Air filtration is important for indoor atmospheres because the work place is becoming increasingly dangerous due to either smoking or illnesses. As many illnesses are passed through air, it is sensible to filter air to sustain a healthy workforce. Filtration reduces allergies and the threat of asthma attacks to sufferers.