Audel Refrigeration Home and Commercial
Chapter One
Fundamentals of Refrigeration
Refrigeration, regardless of the means by which it is obtained, may
be defined as a process of the removal of heat from a substance
or from a space. Thus, if heat is removed from any substance or
space, that substance or space becomes cool. In making the statements
warm or cool, you must remember that these are relative
statements. What is warm or cool is relative to surrounding temperatures.
Thus, you must consider temperatures as measured by
means of thermometers to arrive at the relationship between heat
and cold.
From the foregoing statement, it follows that the problem of refrigeration
concerns itself with heat removal from a substance or a
space. Heat is a form of energy, such as electrical, chemical, and
mechanical energy. It must be stated that energy can be neither created
nor destroyed, but can be converted from one form to another, with
temperature indicating its relative intensity.
The first method of refrigeration in recent history was by means
of cutting and storing ice in cabinets. Later, considerable progress
was made in the commercial manufacture of artificial ice. Probably
the most widely ... read full excerpt from Audel Refrigeration Home and Commercial ebook
