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what does a refrigerator work? [2011-03-28]

Ironically, Refrigerator Compressor keep things cold because the nature of heat. The second law of thermodynamics essentially states that if a cold object is placed next to a hot object, the object is hot and the cold-hot object is cooler. A refrigerator does not cool labels by reducing the initial temperature, but as an evaporating gas is a refrigerant, heat to the atmosphere is much colder. air conditioners and refrigerators are working on the principle of evaporative cooling.

A refrigerator has two compartments - require frozen foods and items that are shown for cooling but not cold. These compartments are surrounded by a series of heat exchange tubes. In the bottom of the cooling chamber is a metal device called "a heavyweight. The compressor is driven by an electric motor. The heat exchange tubes are coiled behind the refrigerator. Across the whole system is pure ammonia, which evaporates to -27 degrees Fahrenheit (-32 degrees Celsius). This system is closed, that is, nothing is lost or added during the operation. Because liquid ammonia is a strong chemical, if a refrigerator that leaks to be repaired or replaced immediately.
 
The cooling process starts with the compressor. Ammonia gas is compressed until it becomes too hot to increased pressure. The hot gas flow in the coils behind the refrigerator, the excess heat to the ambient air can be released. Therefore, users often feel the hot air circulating around the fridge. Finally, ammonia is cooled to the point where it becomes liquid. The liquid in the form of ammonia is forced through a device called a regulator. In essence, the controller is a small opening that the liquid ammonia is activated in a very cold winter, the fog evaporates quickly in motion when traveling through the coils in the freezer. Due to the evaporation of -27 degrees Celsius (-32 degrees Celsius), which extracts heat from the ammonia environment. This is the second law of thermodynamics in force. cold materials such as ammonia evaporates, tend to warm warmer materials, such as water to be taken away.

As the evaporation of ammonia absorbs more heat, its temperature rises. Coils surrounding the refrigerator is not so compact. Ammonia cold or heat from hot objects in the refrigerator, but not as much as the Freezer Compressor. The ammonia gas is absorbed by the compressor in the cycle of pressurization, cooling and evaporation begins again.