Part 2/9:
At its core, refrigeration serves a fundamental purpose: to move heat energy from its interior to the external environment. This process is a relentless struggle against natural forces, primarily entropy, which seeks to equalize temperatures. Freezers and refrigerators operate using various components, most notably a heat pump, which employs a refrigerant that absorbs heat from the interior and disperses it outside.
Essentially, these appliances or systems create a thermal barrier, which slows the transfer of heat from the outside world to the inside space. Despite technological advancements, the essence of refrigeration remains the same: to combat the infiltration of energy that threatens to raise internal temperatures.