Air conditioning is a technical process intended to cool indoor air to room temperature at high outdoor temperatures. Air conditioning usually works according to the same principle as a refrigerator and a heat pump. The process was invented in 1902 by North American Willis Carrier. [source needed]
Air conditioning is common indoors in hot climates. Many cars of the newer model also have air conditioning. However, it is unusual in Europe due to lower temperatures during the summer.
When you cool a substance, you remove the heat that is in it. In the type of air cooler used in air conditioners and refrigerators, this is done by using the principle that if a liquid changes from a high pressure to a lower one, the liquid will absorb heat from the surroundings.
In a cooling system, some form of refrigerant, such as freon, is transported around which absorbs the heat in the ambient air and thus cools it down. This is accomplished in the evaporator. The refrigerant is led into the evaporator as a liquid and passes there to gas. Thus, the refrigerant absorbs heat from the air. The refrigerant gas is sucked into a compressor which compresses the gas to high pressure and then to the condenser. Due to the increase in pressure, the temperature has risen. This allows the refrigerant to emit heat. After the condenser, the medium is again a liquid, still under high pressure. It is then passed through an expansion valve which lowers the pressure before the refrigerant reaches the evaporator again and the whole cycle has been completed. Net energy has been transferred from the evaporator to the condenser.
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How does Air Conditioning work?
Synonyms for air conditioning
- air treatment, ventilation, air-conditioning, air-conditioning, air conditioning