A refrigerator is a popular domestic machine that has a thermally insulated compartment and a heat pump that transfers heat from inside the refrigerator to the external environment so that the temperature inside the refrigerator is lower than the ambient temperature of the room.
Nowadays refrigerator is used to preserve food in almost all countries, it reduces the reproduction rate of bacteria because they cannot breed in low temperature.
Keeps the refrigerator temperature slightly above the freezing point, the temperature is kept at 3-5 degrees (37 to 41 degrees F) to keep food safe.
Any machine whose temperature is below freezing point is called Freezer.
Even before the fridge, a machine was used to keep cool, which was called icebox, but the refrigerator replaced it.
Parts of Refrigerator- Essay on Refrigerator:
Refrigerator consists of very important parts that work in the process of refrigeration as follows:
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It is also known as flow control device.
An expansion valve works to control the flow of liquid refrigerant to the evaporator.
We also know liquid refrigerant by the name coolant.
The Expansion valve is a really small device and is very sensitive.
This makes sense of temperature change of refrigerant easily.
The compressor consists of a motor which pulls the refrigerant from the evaporator and compresses it to create hot high pressure gas inside the cylinder.
This is the main part that actually cools the things kept inside the fridge, it has finned tubes.
They are made of metals whose thermal conductivity is very high so that it can increase heat transfer.
It absorbs the heat from the coil when the fan blows.
In this way, the evaporator absorbs the heat of the stuff inside the refrigerator and due to this heat the liquid refrigerant is converted into steam.
Condenser- essay on refrigerator:
The condenser is mounted on the back of the fridge which looks like a wire mesh.
These are tubes made of condenser coil in which the fin is made outward.
It absorbs the heat of the gaseous refrigerant and spreads it to the atmosphere, which helps to liquefy the gaseous refrigerant.
When the heat of the refrigerant is removed, its temperature is decreases and the condensation reaches at certain temperature and then becomes steam.
We also know the refrigerant by the name of coolant, it is a liquid that keeps the refrigeration cycle running continuously.
It is a very specially designed chemical which specializes in changing the states of hot gas and cool liquid.
In the 20th century, fluorocarbons, especially CFC’s were used as refrigerants.
But in terms of time, according to the environment, refrigerant took place like ammonia, R-290, R-600A etc.
Advantages of Refrigerator:
- We can store food in the fridge for a long time and keep it free from germs.
- Some food items are get deteriorate quickly due to the outside environment, we can also keep them in the fridge and use them after a few days.
- Even if the food is not wicked outside, there is a risk of insects getting bogged down, but the food is also saved from insects inside the fridge.
- We keep drinking water, cold drinks, there is no use of drinking without cooling and in that sense, it is also very beneficial for us.
Disadvantages of Refrigerator:
- We have to keep the fridge continuously with 24 * 7 electricity and it costs a lot of electricity.
Conclusion for refrigerator Essay:
Although we use the fridge every day but pay very little attention to it, most of all we remember it in the summer season because we need cold water and a cold drink.