Types of Air Conditioning Systems

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1. Types of air conditioning system The most commonly types of air conditioning system which are used are:- 1. Window air conditioner 2. Split air conditioner 3. Packaged air conditioner 4. Central air conditioning system 1.1. Window air conditioner Window air conditioner is the most widely used air conditioner for single rooms. It is a simplest form of air conditioning system. All the components like compressor, condenser, expansion valve, evaporator and cooling coil are enclosed in a single box. This arrangement is fitted in a space made in the wall of the room. Window air conditioner contains of the rigid base on which all the parts of the window air conditioner are accumulated. Parts of the Window Air Conditioners The parts of the window air conditioner can be divided into following categories • The refrigeration system • Air circulation system • Ventilation system • Control system • The electrical protection system The refrigeration system of window air conditioner The refrigeration system of window air conditioner is that which consists all parts of the refrigeration cycle namely condenser, compressor, evaporator and expansion valve. Refrigerant R22 is generally used in most of window air conditioners. Hermetically sealed type compressor is used in window air conditioners which are small in size and the life of this compressor is very long. Replacement is also very easy if there is any maintenance is required. Copper tubing is used for making the condenser of window air conditioners and it is cooled by the atmospheric air. Fin is used in the condenser to allow faster heat transfer rate from it. For the expansion valve in the window air conditioners capillary tube is used which is made up of the various round of the copper ... ... middle of paper ... ...offices, theater, various parts of the airport etc. The supply and the return air ducts are placed at the top of these rooms. The function of supply air ducts is to supply the cool air to the room through one set of the diffusers, while the function of return air ducts is to absorb the hot return air from the room for recirculation. After that the hot return air enters into the air handling unit, where it is cooled and reenters the room through supply duct to produce air conditioning effect. 1.4.4. Cooling Tower The cooling tower is used to cool the water. When water flows through compressor and condenser some water gets evaporated, to overcome this loss some water is also added in the cooling tower. Evaporative type of cooling tower is used. In the cooling tower the water is cooled by the atmospheric air and is re-circulated via the compressor and the condenser.

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