Energy Efficient Air Conditioners

Introduction:

It is a matter of common experience that living becomes uncomfortable at a place which is hot and humid. On the other hand, we find it comfortable if the place is cool and dry. The climate at a place mainly depends on the temperature, humidity and the rate of flow of air. For comfortable living, the following conditions should be satisfied.

(a) Temperature , 23oC to 25oC.

(b) Humidity, 60 to 65 %

(c) Wind velocity , 0.75 m/s to 2.5 m/s

(d) Fresh air circulation, 25% of the total air circulation.

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The condition can be artificially controlled if they are not naturally available. The controlling of the environment in the limited space is called air conditioning.

In summer, temperature and humidity have to be reduced and flow of air is also to be maintained. In winter, temperature has to be raised and humidity may have to be increased.

In hot countries, the "air conditioner" used is such that it sucks air from the room, removes some moisture from it, cools it to some extent and sends it back in the room. In a short time, the room is made 'comfortable'. In cold countries,the air conditioner is used as a heater. By passing the air over heating coil it warms the room.

At places near the sea-shore,during summer, an air conditioner is mainly used for reducing the humidity.

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Examples of Energy Efficiency Service


Insulating a home or a building to use less heating and a cooling energy in achieving and maintaining a comfortable temperature. The second example is, installing fluorescent lights or skylights for replacing incandescent lights to attain the same level of illumination. A compact fluorescent lights requires two-third less energy and it lasts ten times longer than an incandescent light bulb. The Modern energy-efficient appliances too, such as freezers, refrigerators, dishwashers, ovens, stoves and the cloth washers and dryers, use less energy than older appliances. A current energy efficient refrigerator uses 40 percent less energy than conventional models did in 2001. Following this, if all the households in an Europe changed their old appliances into new ones,The  20 billion kWh of electricity would be saved annually, there by a reducing CO2 emissions by almost 18 billion kg.