Air conditioning unit-en
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Own work by uploader; The New Book of Knowledge 1997. p. 102.
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An air conditioning unit:
- The coils and pipes in an air conditioning unit contain refrigerant gas. The refrigerant gas enters the compressor as warm, low-pressure gas and leaves it as hot, high-pressure gas.
- In the condenser coils, hot, compressed refrigerant gas loses heat to the outdoor air and becomes liquid while it is still warm.
- The warm, liquid refrigerant passes through the tiny opening of the expansion valve, expands, and partly turns to gas at a low temperature.
- In the cooling coils, the refrigerant takes up heat from the indoor air and leaves the coils as warm, low-pressure gas.
- The indoor air gives up heat to the refrigerant in the cooling coils and also loses moisture as it is chilled. The moisture condenses on the coils and trickles down to outside drain holes. Cooled air is blown back into the room.
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