What Is The Working Principle Of Refrigerator?


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Anonymous Profile
Anonymous answered
Have you ever wondered ...
How your fridge cools the food you put inside it? This is a good practical example of the gas laws in action. Temperature, pressure and volume all have a part to play in the cooling process.  
To see an animated diagram of how a fridge works. (Close the new window to return to this page).  
Gas is drawn at low pressure and low temperature through a line. The gas is compressed using electricity to a higher pressure and its temperature rises (just like a bicycle pump which gets warmer when you are pumping up a tyre). It is then transferred to a condenser where the heat is removed and the gas begins to condense into a liquid. The heat is released via cooling fins on the back of the fridge unit. The liquid then goes through an expansion device where its pressure is suddenly lowered, it expands and some of the liquid turns very quickly into a vapour. This change of state has a cooling effect. Now the cold vapour and liquid are able to cool the air in the cabinet of the refrigerator through an evaporator. The liquid absorbs the warmth from the air inside the refrigerator and turns back into a low temperature gas, at low pressure. It now starts its journey again through the compressor.
Anonymous Profile
Anonymous answered
Fridges are lined with coils of piping which contain a refrigerant gas. They also have coils of piping on the outside of the casing to the rear of the fridge which work as a heat exchanger. The basic mechanism of a refrigerator works by transforming the refrigerant gas into a liquid and back into a gas to create repeated evaporation of the refrigerant. It is this evaporation process that produces low temperatures. Think about how sweat works to lower body temperature and you have the basic principle in mind. All fridges have a compressor, it is this small engine that you can hear as the fridge cycles on and off. The compressor creates a pressurized environment in part of the fridge. Under pressure the refrigerant warms up and the pressure increases. The heat exchanging coils outside the fridge allow the heat to be dissipated and as it cools the gas turns to liquid form and runs through into the coils inside the fridge which is a comparatively low-pressure area. As the refrigerant expands it evaporates thus absorbing heat and cooling the inside the fridge before repeating the cycle.
selva murugan Profile
selva murugan answered
Working principle of refrigerator
Amanda Wells Profile
Amanda Wells answered
THe principle is based on the second law of thermodynamics, which states that if a hot object is put next to a cold one, the hot object will cool down and the cold one will get hotter. An evaporating gas in a refrigerator draws heat away from objects, and this means that the air around them gets much colder (the gas is called a refrigerant.)
Anonymous Profile
Anonymous answered
Its is work by the compressor pipe is bringing from temp heat as a refrigerant gas and turn to liquid and come back to gas it is the work of the refrigerator.
Fangju Fangju Profile
Fangju Fangju answered
Refrigerator works are: 1) compression refrigerator: Refrigerator by the
electric motor to provide the kind of mechanical energy, through the compressor
of the refrigeration system to make power. Refrigeration system uses a low
boiling point refrigerant evaporates, absorbing heat of vaporization of
principle made. The advantage is long life, easy to use, the world's 91 to 95%
of the refrigerators of this type. Currently used freon refrigerators use of a
substance called as hot, "Porter", the refrigerator's "hot", "transport" to the
outside of the refrigerator. Red charm Samsung BCD-252MJGR 2) absorption
refrigerators: The types of refrigerators available heat source (such as gas,
kerosene, electricity, etc.) as the driving force. Use of ammonia - water -
mixture of hydrogen absorption in a row - the diffusion process to achieve
cooling purposes. The disadvantage is low efficiency, slow cooling has been
gradually phased out. 3) Semiconductor Refrigerator: It is the use of the
PN-type semiconductor, is connected to DC in the node to generate the principle
of Peltier effect to achieve cooling refrigerator. 4) Chemical refrigerator: It
is the use of certain chemical substances dissolved in water, the strong
endothermic cooling effect obtained refrigerator. 5) Electromagnetic Vibration
refrigerator: It is the electromagnetic vibration machine for the power to drive
the compressor of the refrigerator. The principle, structure and compression
refrigerator basically the same. 6) solar refrigerator: It is the use of solar
energy as a cooling refrigerator.

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