How Air Conditioners Work?
- An air conditioner is able to make the temperature in a room nice and cool because of a special chemical called a coolant. The specialty of the coolant is that it has properties that easily allow it to change back and forth between a liquid and a gas.
- The inside of an AC is a windy tube containing the coolant. When the coolant changes from one state to another there is a large transfer of energy which is what is responsible for cooling a room. The part of the tube with the compressor is outside and the evaporator along with the outlet for cool air is inside the room. When the liquid coolant reaches the evaporator, it absorbs the heat around it and turns into a gas.
- This warm gas then passes through the compressor. The compressor transforms the gas back into a liquid by squashing all the heat out of it. The hot air is expelled outside the room and the cool liquid continues down its path. This process continuously recycles warm air into cool air. Your fridge works the same way, just think of the room as much tinier and the food as the people.
THINGS TO DO
- Find out how an electric water heater works. Is it similar to an air conditioner?
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- Timeline of Cooling Inventions, visit: http://mocomi.com/cooling-inventions/