What is a Split Air Conditioner System?
A split air conditioner consists of two main parts: the outdoor unit and the indoor unit. The outdoor unit is installed on or near the wall outside of the room or space that you wish to cool. The unit houses the compressor, condenser coil and the expansion coil or capillary tubing. The sleek-looking indoor unit contains the cooling coil, a long blower and an air filter.
Split air conditioners are used for small rooms and halls, usually in places where window air conditioners cannot be installed. However, these days many people prefer split air conditioner units even for places where window air conditioners can be fitted.
There are two main parts of the split air conditioner. These are:
Outdoor unit: This unit houses important components of the air conditioner like the compressor, condenser coil and also the expansion coil or capillary tubing. This unit is installed outside the room or office space which is to be cooled. The compressor is the maximum noise making part of the air conditioner, and since in the split air conditioner, it is located outside the room, the major source of noise is eliminated. In the outdoor unit there is a fan that blows air over the condenser thus cooling the compressed Freon gas in it. This gas passes through the expansion coil and gets converted into low pressure, low temperature partial gas and partial liquid Freon fluid.
2) Indoor unit: It is the indoor unit that produces the cooling effect inside the room or the office. This is a beautiful looking tall unit usually white in color, though these days a number of stylish models of the indoor unit are being launched. The indoor unit houses the evaporator coil or the cooling coil, a long blower and the filter. After passing from the expansion coil, the chilled Freon fluid enters the cooling coil. The blower sucks the hot, humid and filtered air from the room and it blows it over the cooling coil. As the air passes over cooling coil its temperature reduces drastically and also loses the excess moisture. The cool and dry air enters the room and maintains comfortable conditions of around 25-27 degree Celsius as per the requirements.
Split Cooling Unit
        Split Cooling Unit consist of three heat exchangers. The temperature of  water of the Evaporative cooler decreases gradually after starting the cooler. This cooled water is supplied to the Split Cooling Unit. When the air passes through the heat exchanger, it losses its heat and cooled air of 25oC is supplied to the room without increasing its humidity. This unit can be used in non coastal region.
The experimental investigation above confirmed that split unit demonstrated reasonable potential for use as a wetted media in evaporative cooling systems. Consequently, it creates the possibility of new sustainable engineering systems where either cooling or humidifying is required. As the unit maintain the temperature 25°c and it has low cost than AC so it will be good replacement for AC..
For the future modifications, if the density of the split unit is reduced then we can achieve better performance than that achieved. Also we can increase the thickness of the pad to achieve good performance.

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