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Consumer Electronics by S. P. Bali

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REFRIGERATION

An environmental control system that includes cooling and dehumidification will require a means of removing heat from the conditioned spaces. Because heat flows from a higher to a lower temperature, a fluid with a temperature lower than the room design temperature must be made available, to which the excess room heat can be transferred.

A natural heat sink that is used occasionally for cooling water is atmospheric air. In climates where the humidity is extremely low, evaporative cooling of air may reduce both the air and water temperature low enough so that either can be used for cooling.

A refrigeration system extracts heat from a substance at a temperature lower than the ambient and transfers the extracted heat to the atmosphere ...

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