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How are finned coils and refrigerant tubes made?
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How does an air conditioner make air colder?
The answer to your question is found in a science called Thermodynamics. If you have a chance to find a textbook, it is a fascinating science which studies the transfer of energy from one form to another. Hot air has a higher energy content then cool air. The air conditioner passes air over coils using convection to suck energy out of the air and into the much cooler coils. Because air coming out of the air conditioner has less energy, it has a lower temperature than the air that goes into the air conditioner. The coils are made cool by a chemical called refrigerant, which has special properties. The coils are made cold by the refrigerant when the refrigerant expands from a highly compressed state to a low compression state. The difference between these two states is one of low energy to high energy; the energy must come from somewhere, so the refrigerant sucks the energy from the coils, which in turn suck the energy from the air, so it forms a chain as such: decompressed refrigerant (takes energy from coils). The decompressed refrigerant must be compressed again, so energy is used to compress the refrigerant again so that the process can begin again. This is why every air conditioner has a compressor. The compressor uses energy from the electrical outlet to compress the air. In this way, we use energy from the electrical outlet to take energy from the air over and over and over again until the air is a temperature that you like. Air conditioners do not however make allair cooler, They make air in one area cooler at the expense of adding heat to another area. This heat originates as the power put into the compressor. This is exactly the same way that a refrigerator makes its interior cold while making the room it is in warmer.
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