Tuesday, August 20, 2019

Refrigeration (Free PDF)

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Refrigeration is a process in which work is done to move heat from one location to another. Refrigeration has many applications these include but are not limited to; household refrigerators, industrial freezers, cryogenics, air conditioning, and heat pumps.

Cold is the absence of heat, hence in order to decrease a temperature, one "removes heat", rather than "adding cold." In order to satisfy the Second Law of Thermodynamics, some form of work must be performed to accomplish this. The work is traditionally done by mechanical work but can also be done by magnetism, laser or other means.

* Historical applications
1. Ice harvesting
2. First refrigeration systems
3. Widespread commercial use
4. Home and consumer use
5. Current applications of refrigeration
* Methods of refrigeration
1. Non-cyclic refrigeration
2. Cyclic refrigeration
3. Vapor-compression cycle
4. Vapor absorption cycle
5. Gas cycle
6. Thermoelectric refrigeration
7. Magnetic refrigeration
8. Other methods
9. Unit of refrigeration
Additional reading
External links

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