Automotive air conditioning. What used to be a thing for only the most luxurious cars, now is a necessity. We don't just want our cars to get us from point a to point b, we want them to get us there comfortably. Keep us warm in the winter and cool in the summer.
Even with its comparatively small size, the cooling system has to deal with an huge amount of heat to protect the engine from friction and the heat of combustion. The cooling system has to remove about 6,000 BTU of heat per minute. Yes, read that again...6000 BTU PER MINUTE. This is way more heat than we use to heat a large home in the winter. It's good to know that some of this heat can be put to the useful purpose of keeping us warm.
Air conditioning makes driving much more comfortable in hot weather. Your car's air conditioner cleans and dehumidifies the outside air entering your car. It also keeps the air at the temperature you choose.
The job of the air conditioning system is really to remove the heat that makes us hot, and return the air to the car's interior in a "un-heated" condition. Air conditioning, or cooling, is really a process of removing heat from an object (like air).
A compressor circulates a liquid refrigerant called refrigerant. The compressor moves the refrigerant from an evaporator, through a condenser and expansion valve, right back to the evaporator. The evaporator is right in front of a fan that pulls the hot, humid air out of the car's interior. The refrigerant makes the hot air's moisture condense into drops of water, removing the heat from the air. Once the water is removed, the "cool" air is sent back into the car's interior.
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