Tech@Edu

Vapour Compression Refrigeration System Vapour-compression refrigeration  or  vapor-compression refrigeration system  ( VCRS )  in which the  refrigerant  undergoes  phase changes , is one of the many  refrigeration cycles  and is the most widely used method for  air-conditioning  of buildings and automobiles. Vapor-compression uses a circulating liquid  refrigerant  as the medium which absorbs and removes heat from the space to be cooled and subsequently rejects that heat elsewhere. History:- 1805- The American inventor  Oliver Evans  described a closed vapor-compression refrigeration cycle for the production of ice by ether under vacuum. 1834-   American Great Britain,  Jacob Perkins , built the first working vapor-compression refrigeration system in the world. 1842-  American physician,  John Gorrie  who built a working prototype, but it was a commercial failure. 1850- American engineer  Alexander Twining  took out a British patent for a vapor compress

Fundamentals of Refrigeration "Refrigeration is the science of producing & maintaining temperature below that of surrounding atmosphere." Or Refrigeration   is a process that removes heat from a space, substance, or system to lower and/or maintain its temperature below the ambient temperature. In simple refrigeration means the cooling or removal of heat from a system.  R efrigeration  is artificial (human-made)  cooling . Energy in the form of heat is removed from a low-temperature reservoir and transferred to a high-temperature reservoir. The work of energy transfer is traditionally driven by  mechanical  means, but can also be driven by heat,  magnetism ,  electricity ,  laser , or other means. The equipment employed to maintain the system at a low temperature is termed as Refrigerating System & the system which is kept at lower temperature is called Refrigerated System. The Refrigeration is generally produced by following three ways: 1.