Portable air cooler / Hamidi Yusof, Mohd Hezri Mohd Ghani and Ardi Abdul Rahman

Air conditioning is defined as the simultaneous control of temperature, humidity, radiant energy, air motion and cleanliness within the purpose of satisfying the requirement of comfort or a process. Most of us assume that air conditioning is just a cooling process only but as the definition states it is great deal than that. It can be used to cool or warm surrounding temperature, meaning that temperature will be changed to the suitable condition depend on the place. It also can increase or decrease humidity by applying some process. The processes involve in air conditioning are heating, ventilating, cooling and many more. In general, air conditioning systems (air conditioner) actually divided into two types. There are central unit and split unit. Central unit is normally used in large building while split unit is used in small building such as in a room. (See ref. 1). However, an air conditioning process that widely used nowadays using chemical product as a cooling agent. This will causes ozone depletion to the earth and bad for human health. Besides that, the equipment that uses the principle of air conditioning system, such as air conditioner only is installed at certain place that is indoor area without the ability to remove it again.