Cooling System

Have you ever wondered how your refrigerator keeps your food cool even when the kitchen feels warm? That’s because it uses a special cooling system that moves heat away from the food.

Typically, heat, which is thermal energy, flows from warmer to cooler areas, but a refrigerator does the opposite. It takes heat from inside and releases it into the room.

The key player in the cooling system is something called a refrigerant.

It is a special substance that can switch between a liquid and a gas.

It travels through coils inside the fridge, called evaporator coils.

As it flows through them, it absorbs heat from the food and turns into a gas.

A compressor then uses electrical energy to squeeze the gas, increasing its pressure and making it very hot.

The hot gas moves through condenser coils at the back of the refrigerator, where it gives off heat to the surrounding air, cools, and turns back into a liquid.

The liquid refrigerant then goes back to the evaporator coils and repeats the cycle.