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A look at how different compressors work
Most cooling systems, from residential air conditioners to large commercial and industrial chillers, employ the refrigeration process known as the vapour compression cycle. At the heart of the vapour compression cycle is the mechanical compressor. A compressor has two main functions: 1) to pump refrigerant through the cooling system and 2) to compress gaseous refrigerant in the system so that it can be condensed to liquid and absorb heat from the air or water that is being cooled or chilled (See the "How it Works" section of the article "Gas Engine Chillers" for an explanation of the vapour compression cycle).
There are many ways to compress a gas. As such, many different types of compressors have been invented over the years. Each type utilizes a specific and sometimes downright ingenious method to pressurize refrigerant vapour. The five types of compressors used in vapour compression systems are Reciprocating, Rotary, Centrifugal, Screw and Scroll.
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