Many of us
think a refrigerator is any kind of enclosed box\cabinet,
where the temperature is noticeably lower than our
surrounding environment. But that’s not all a refrigerator
is, it is also known as a heat engine. The main parts in a
refrigerator are the refrigerant, the condensing coil,
compressor, and the expansion valve. The principle behind
a refrigerator was the latent heat of fusion correlated
with melting ice. Essentially, work is done on substance
used for refrigeration, in order to accumulate energy to
make the substance cold.
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