Working Principle Of Domestic Refrigerator

August 31, 2024 Post a Comment

Working principle of domestic refrigerator

A domestic refrigerator is essentially small cold storage where several food products such as ice cream, meat, fruits, milk etc can be stored at reduced pressure. A domestic refrigerator uses a vapour compression refrigeration system for maintaining required storage conditions.

What is the principle of refrigerator in physics?

A refrigerator works on the principle of the second law of thermodynamics. This law is related to the extraction of heat from a body i.e. to lower the temperature of the body. The temperature of the body can be lowered by extracting or removing the heat from the material or the body.

Which cycle is used by domestic refrigerator?

Compressor refrigerators. A vapor compression cycle is used in most household refrigerators, refrigerator–freezers and freezers. In this cycle, a circulating refrigerant such as R134a enters a compressor as low-pressure vapor at or slightly below the temperature of the refrigerator interior.

How refrigerator works on the principle of thermodynamics?

How they work. According to the Second Law of Thermodynamics, heat will always flow spontaneously from hot to cold, and never the other way around. A refrigerator causes heat to flow from cold to hot by inputting work, which cools the space inside the refrigerator.

What are the main components of domestic refrigerator?

The 4 Main Refrigeration Cycle Components

The compressor.
The condenser.
The expansion device.
The evaporator.

What are the two types of domestic refrigerator?

The six types of fridge configurations are top or bottom freezer, French door, side-by-side, undercounter, and quad door refrigerators.

How a refrigerator works step by step?

The Refrigeration Cycle: Step by Step

STEP 1: Refrigerant compressed.
STEP 2: Hot air pushed out. ...
STEP 3: Refrigerant becomes a liquid. ...
STEP 4: Refrigerant flows into evaporator coils. ...
STEP 5: Heat is absorbed. ...
STEP 6: Refrigerant evaporates. ...
STEP 7: Cycle repeats.

Which gas is used in domestic refrigerator?

Tetrafluoroethane or Norflurane is the most commonly used Refrigerator gas nowadays. Earlier, the manufacturers were using ammonia and other harmful gases. These gases badly affect the atmosphere and increase the heat in the environment, leading to harm to the Ozone layer.

Which compressor is used in domestic refrigerator?

You find reciprocating compressors in household refrigerators and freezers (welded hermetic compressors). In commercial refrigeration and air conditioning systems are semi-hermetic, and welded hermetic compressors.

What gas is used in domestic fridges?

Some fridges and freezers contain fluorinated greenhouse gas (or 'F gas'). The type of F gas usually found in fridges and freezers is hydrofluorocarbon ( HFC ) gas.

What are the 4 process of refrigeration?

Conclusion. There are four main components to the refrigeration cycle: evaporator, compressor, condenser, and metering device/ thermal expansion valve (TXV). The main function of the refrigeration cycle is to absorb heat from indoor air and dispel it outdoors.

Which law is used in refrigerator?

The second law of thermodynamics claims that it is impossible for heat to spontaneously flow from a cold body to a hot body, but it can move in that way if some form of work is done. This is how the refrigeration process works, and an example can be seen in Figure 1.

What is the working principle of thermodynamics?

The first law of thermodynamics states that the internal energy of an isolated system is conserved. That is, for a system to which no energy can be transferred by the agency of work or of heat, the internal energy remains constant.

What are the requirements of domestic refrigerator?

Standard refrigerators of capacity 90, 165, 210, 300, 420 litres etc. ... Refrigeration system of domestic refrigerator consists of following main components:

Hermetically sealed compressor.
Fin and Tube type evaporator.
Accumulator.
Thermostat.
Air cooled condenser.
Capillary tube.
Drier and strainer.

What are 3 parts of a refrigerator?

Learn about the main parts of a refrigerator, from the compressor to the evaporator coils, and discover what each part does.

Compressor. The compressor is essentially an engine.
Condenser coils. ...
Expansion Device. ...
Evaporator coils.

What is refrigeration system and function?

The refrigeration system makes a cold room work. It is simply a process of transporting heat from one place to another. The vapour-compression system is the most commonly used method of refrigeration. It is frequently used in large cold rooms like industrial chillers.

What is the difference between a commercial fridge and a domestic fridge?

Commercial refrigerators are more powerful and larger than their domestic counterparts. These features, along with enhanced storage space, make them suitable for commercial businesses of all sizes. In addition, cleaning commercial fridges is easy too.

Which type of evaporator is used in domestic refrigerator?

The plate surface evaporators are commonly used in the household refrigerators. These evaporators are also in the form of coil which is attached to the plate. The finned evaporators are also made of copper coil with fins on the external surface as well on the internal surface.

Who invented domestic refrigerator?

In 1913, American Fred W. Wolf invented the first home electric refrigerator, which featured a refrigeration unit on top of an icebox. Mass production of domestic refrigerators began in 1918 when William C. Durant introduced the first home refrigerator with a self-contained compressor.

Which CFC is used in refrigerators?

Chlorofluorocarbons that is called as freons are nonreactive, non inflammable, nontoxic organic molecules. So they are widely used in refrigerators and air conditioners. Q.