The Basic Principle of Refrigerators - Have you ever wondered how the refrigerators in your homework refrigerators which have become an integral part of every household work. Based on some simple and interesting scientific principles beginning with the basic refrigerator model, this article will elaborate on the operation of modern refrigerators along with the secrets behind their high energy efficiency.
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The basic principle of refrigerators is simple. Simply pass a colder liquid continuously around the object to be cool. Let's see how this continuous called liquid flow is achieved inside a refrigerator. A simple device called a throttling device is the most crucial component of refrigerators. What is used as throttling device a cold liquid is produced using the throttling phenomenon. Or if I do the throttling at the inlet the refrigerant should be at a liquid state under high pressure.
Throttling device has an obstruction to the flow so huge pressure drop occurs when the liquid flows through it. As the pressure drops the boiling point of a liquid comes down. Does the refrigerant liquid evaporates. The energy required for such a vibration comes from the refrigerant so it's temperature drops. You will notice this drop when you check the temperature across the throttling device.
Please note that only a portion of the refrigerant is evaporated here. This is ones important property of the refrigeration fluid. It should be able to change the phase while varying the pressure under normal temperature. The next phase is simple just passed this cold liquid over the body which is to be cooled. The refrigerant further evaporates and transforms into pure vapor during the heat absorption process. Since there is phase change during this process the refrigerant temperature does not increase this heat exchanger is called the evaporator.
With the help of clever air flow circulation inside the refrigerator using an evaporator fan one can maintain different temperature levels. So we have produced the required refrigeration effect if we could take this low-pressure refrigerant to the state before throttling that is high pressure liquid we will be able to repeat this process. So the first step is to raise the pressure. A compressor is used for this purpose.
The compressor will raise the pressure back to its initial value. You can see that a reciprocating type compressor is used here. However since it is compressing gas along with pressure the temperature will also increase. This is unavoidable. Now the refrigerant is high pressure vapor.
To convert it to a liquid stage we introduce another heat exchanger. This heat exchanger is fitted outside of the refrigerator. It will liberate heat to its surroundings vapor will be converted to liquid and temperature will reach a normal level this heat exchanger is known as a condenser. Now the refrigerant is back to its initial stayed so we could be fed to the throttling device again. Just by repeating the cycle over and over we will be able to achieve a continuous cooling effect. Who is more specifically called the vapor compression cycle.