May 2018
Intermediate to advanced
1160 pages
30h 12m
English
Content preview from Thermal Engineering
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Chapter 18
Introduction to Refrigeration
18.1 ❐ INTRODUCTION
The process of producing cold by artificial means may be called refrigeration. The term ‘refrigeration’ may be defined as the artificial withdrawal of heat, producing in a substance or within a space, a temperature lower than that which would exist under the natural influence of surroundings. In other words, the refrigeration means a continued extraction of heat from a body whose temperature is already below the temperature of its surroundings. In refrigeration, heat is virtually being pumped from a lower temperature to a higher temperature.
According to the second law of thermodynamics, the extraction of heat from a body at lower temperature to a higher temperature can only be performed ...
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