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#Next, the cooled liquid is passed to an expansion valve, which reduces the pressure on the refrigerant and allows it space to convert back to a gas.
#Next, the cooled liquid is passed to an expansion valve, which reduces the pressure on the refrigerant and allows it space to convert back to a gas.
#Then, the refrigerant is moved to the evaporator, where it is converted into a gas. This decompression consumes heat, making the surrounding area very cold. A fan moves air (or in some cases, liquid) through the evaporator, which gives heat to the refrigerant as it changes states of matter, but also cools air (or liquid) coming from outside the system.
#Then, the refrigerant is moved to the evaporator, where it is converted into a gas. This decompression consumes heat, making the surrounding area very cold. A fan moves air (or in some cases, liquid) through the evaporator, which gives heat to the refrigerant as it changes states of matter, but also cools air (or liquid) coming from outside the system.
#Lastly, this cool gas is moved to the compressor, where is is converted back into a hot liquid.
#Lastly, this cool gas is moved to the compressor, where it is converted back into a hot liquid.
The simple science behind this entire system is that for a gas to become a liquid, more energy is required. As heat is taken from its surroundings, something placed nearby can be cooled.<br />
The simple science behind this entire system is that for a gas to become a liquid, more energy is required. As heat is taken from its surroundings, something placed nearby can be cooled.<br />
Conversely, when a gas becomes a liquid, heat must be released. (Atoms and molecules need more energy to move freely as a gas than stay as a liquid.) For refrigerant to be useful over and over, it must be converted back into a liquid. This is performed on the "hot" side of the system, so that the liquid can again be moved to the "cold" side and decompressed.<ref>http://www.brighthubengineering.com/hvac/20354-methods-of-refrigeration-vapor-compression-cycle</ref>
Conversely, when a gas becomes a liquid, heat must be released. (Atoms and molecules need more energy to move freely as a gas than stay as a liquid.) For refrigerant to be useful over and over, it must be converted back into a liquid. This is performed on the "hot" side of the system, so that the liquid can again be moved to the "cold" side and decompressed.<ref>http://www.brighthubengineering.com/hvac/20354-methods-of-refrigeration-vapor-compression-cycle</ref>