Refrigerators: Explained.

 

Introduction:

            Before refrigeration, keeping food fresh was a pretty tough job. In those days, people used to salt their food or bury it in the snow to keep it fresh. But now, the refrigerator has changed the way we conduct our daily lives, making it easier to preserve food.

Working:

            Have you ever wondered that how a refrigerator keeps your food fresh and provides you with a refreshingly chilled beverage on a hot day? Well, let's find out.

            Refrigeration is actually quite simple to understand the principles behind it. Just remember that when the liquid evaporates, it absorbs heat and when it condenses, it releases heat.

A simple example is that when your hand is wet, it feels cold. This is the process of the water evaporating and cooling your hand on a very humid hot day.

Components:

            A refrigerator uses five major components:

·         An expansion device

·         Evaporator coils

·         A compressor

·         Condenser coils

·         A refrigerant

            The refrigerant is a liquid that enters in the expansion device. As it passes through, the sudden drop in pressure makes it expand cool, and turn into a gas. As the refrigerant flows around the evaporator coil, it absorbs and removes heat from the food inside. The compressor squeezes the refrigerant, raising its temperature and pressure. It's now a hot high-pressure gas. The refrigerant then flows through condenser coils on the back of the fridge, radiating its heat to the atmosphere and cooling back into a liquid. As it does so, the refrigerant then re-enters the expansion device and the cycle repeats itself. So basically, heat is constantly picked up from the inside of the refrigerator and taken outside of it.

 

 

Stay tuned.

Bye.