With innovation in science plus technology, solar power can today be utilized in many ways. One of the forthcoming applications of energy from the sun is performing air conditioners. Though it sounds as a contradiction, a sun air conditioning works utilizing the sun’s power to cool our houses. Such air conditioners have application which is great in arid areas where there is abundant sunlight. Air conditioning turns into a necessity in such type of places along with sun which is bright as the source of electrical energy, solar air conditioners have become the ideal choice.
Kinds of Solar Air Conditioners
Solar air conditioners are either physically active or passive. Active sun air conditioners are of 2 kinds – solar energy absorption cooler and sun desiccant cooler.
In a sun absorption cooler, solar heating is absorbed by this heat and thermal collectors is used to split up a mixture of refrigerant and absorbent fluids. The refrigerant liquid is then condensed and evaporated. This process cools the air and this chilly air is sent into the home. The absorbent fluid reabsorbs the process and the refrigerant is repeated.
In solar desiccant coolers, moist air passes over a “desiccant wheel” that contains moisture trapping materials. The moisture in the air flow is absorbed by these materials, making the atmosphere cool. Fans are in that case utilized to transmit this cold air through into the room. This type of solar coolers calls for lesser temperatures than absorption coolers.
Passive solar air cooling is often designed along with the house, as it is inbuilt. It’s generally built as a solar chimney or a solar cooling tower. A solar chimney is generally made on the south face of a building. Its south facing side is glazed so that it can efficiently digest the sun’s heat. This chimney is attached to the inside of the home with the help of a vent at a very high point on one side and at a low point on the other. The vents in the accessible point are then connected to large underground pipes.
When the air is heated up at chimney, it generates an upward draft which creates a vacuum. When this particular vacuum is produced, air is pulled into the vent at the lower point and as this air travels through the vent, portable ac unit (read this article) the water pipes cool the atmosphere. Subsequently the cool air is let in with the house for cooling. This particular cycle repeats itself providing a cool ambience.
Advantages of Using Solar Air Conditioners