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A representative pressure–volume diagram for a refrigeration cycle. Vapour-compression refrigeration or vapor-compression refrigeration system (VCRS), [1] 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.
Animation of a spinning scroll compressor. Léon Creux first patented a scroll compressor in 1905 in France and the US. [2] Creux invented the compressor as a rotary steam engine concept, but the metal casting technology of the period was not sufficiently advanced to construct a working prototype, since a scroll compressor demands very tight tolerances to function effectively.
A compressor map is a chart which shows the performance of a turbomachinery compressor. This type of compressor is used in gas turbine engines, for supercharging reciprocating engines and for industrial processes, where it is known as a dynamic compressor. A map is created from compressor rig test results or predicted by a special computer program.
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The heat pump itself can be improved by increasing the size of the internal heat exchangers, which in turn increases the efficiency (and the cost) relative to the power of the compressor, and also by reducing the system's internal temperature gap over the compressor. Obviously, this latter measure makes some heat pumps unsuitable to produce ...
Food in a refrigerator with its door open. A refrigerator, commonly shortened to fridge, is a commercial and home appliance consisting of a thermally insulated compartment and a heat pump (mechanical, electronic or chemical) that transfers heat from its inside to its external environment so that its inside is cooled to a temperature below the room temperature. [1]
Fanfare for the Common Man is a musical work by the American composer Aaron Copland.It was written in 1942 for the Cincinnati Symphony Orchestra under conductor Eugene Goossens and was inspired in part by a speech made earlier that year by then American Vice President Henry A. Wallace, in which Wallace proclaimed the dawning of the "Century of the Common Man".
John Clyde Copeland (March 27, 1937 – July 3, 1997) [1] [2] was an American Texas blues guitarist and singer. In 1983, he was named Blues Entertainer of the Year by the Blues Foundation. [3] He is the father of blues singer Shemekia Copeland. In 2017, Copeland was posthumously inducted into the Blues Hall of Fame. [4]