What is the working principle of a refrigerator?

What is the working principle of a refrigerator?

Refrigerators work by causing the refrigerant circulating inside them to change from a liquid into a gas. This process, called evaporation, cools the surrounding area and produces the desired effect. You can test this process for yourself by taking some alcohol and putting a drop or two on your skin.

How does a refrigerator work 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 is the working principle of compressor in refrigerator?

Compressor The compressor circulates the refrigerant throughout the system. It makes the refrigerator hot by putting pressure on the warm part of the circuit. It consists of a motor that sucks in the refrigerant from the evaporator and compresses to make a hot and high-pressure gas.

How does refrigerator evaporator work?

The basic function of an evaporator in the refrigerator system is to remove the heat from the water, air, and other substances present in the refrigerator. The evaporators of refrigerator systems act as a heat exchanger which helps in transferring the heat from the substance and make it cool.

What are the parts and functions of a refrigerator?

The essential function of refrigerators is to use the evaporation of a liquid (refrigerant) to absorb heat. The main working parts of a refrigerator include: a compressor, a condenser, an evaporator, an expansion valve, and refrigerant.

What is refrigerator refrigerant?

Substance used in a cooling mechanism of refrigerator, as the heat carrier which changes from gas to liquid and then back to gas in the refrigeration cycle. Most common commercial refrigerants are the chlorofluorocarbons (CFCs) which, because of their high ozone damaging potential, are being phased out.

What is the principle of evaporator?

The evaporator works the opposite of the condenser, here refrigerant liquid is converted to gas, absorbing heat from the air in the compartment. When the liquid refrigerant reaches the evaporator its pressure has been reduced, dissipating its heat content and making it much cooler than the fan air flowing around it.

What is refrigerator gas?

Modern refrigerators usually use a refrigerant called HFC-134a (1,1,1,2-Tetrafluoroethane), which does not deplete the ozone layer, unlike Freon.

What are the 4 main components in a refrigerator?

The 4 Main Refrigeration Cycle Components

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

Why R-134a is used as refrigerant?

R134a has fairly good dielectric properties as it has high thermal stability, low boiling point, and chemical inertness against the construction materials used; and is non-toxic and non-flammable. . A dielectric substance in its gaseous state can be used to prevent electric discharges.

What is condenser and evaporator?

The evaporator coil is the part of an air-conditioning system that removes heat and moisture from indoor air to cool it. The condenser coil takes that heat and releases it outside.