Do You Know How Your Ac Works?

Do You Know How Your AC Works?

by

Cedric Loiselle

Air conditioners are important appliances for homes and offices, but people do not know much about them. Air conditioning systems are so commonplace that nobody pays much attention to them. You just turn on your AC without wondering how it does its job.

Air conditioners cool indoor air by using the same principle as your fridge. They utilize heat absorbing phase conversion processes to remove heat from a space. Gases run through a system of coils where they go through a cycle of evaporation and condensation. These gases are called refrigerants, which are gases that turn to liquid at very low temperatures. Air conditioners have fans that draw warm indoor air into the air conditioning unit. The air is cooled inside the air conditioner and is released into the room. That is what you feel as the cool air gushing out of the air conditioner. It seems too easy but it can be a complex process. When warm indoor air is taken by the air conditioner, it passes over the cold evaporator coils. The cold evaporator coils absorb the heat from the passing air. When the evaporator coils absorb this heat, the liquid refrigerant inside turns to gas. This gas is again converted to liquid by the compressor, which subjects the refrigerant gas under extremely high pressure. Compression of gas releases heat. The heat released is moved out. The refrigerant in your AC goes through a cycle of evaporation and condensation. It may seem as though an AC does only a simple task of cooling indoor air. But this is a huge task for an appliance much smaller than the entire room it cools down. Moreover, an AC does not only cool the room, it also does the following tasks: Keeps the temperature within a room constant Removes particles, like dust, from the air Dries your air (acts like dehumidifier) Different parts of an air conditioner make the processes mentioned above possible. The major components of a standard AC are the following: Evaporator Condenser Compressor Expansion valve The evaporator is the cold part of the air conditioner. This part is responsible for bringing cool air to your room. A fan blows air over the cold coils to drive cooled air out of the AC unit to the room. Air conditioners rely on heat exchange principles, so if they have a cold component, they also have a hot component. The hot parts of an AC are the compressor and condenser. The expansion valve lies in between these two components to control how much liquid refrigerant moves into the evaporator. As the compressed refrigerant moves into the evaporator, it expands due to drop in pressure and changes to gas. Generally, all ACs have these major components. Additional parts include sensors, additional valves, and timers. It is also worth noting that there are different types of air conditioners. Window ACs have all the parts in a metal box that fits in a wall opening. Central air conditioners have condensers and compressors that are located outside the house or in a separate housing. In large establishments, the condensing units are installed on the roof.

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Do You Know How Your AC Works?