Refrigeration and Air Conditioning by G.F.Hundy, A.R. Trott and T.C.Welch pdf download

Refrigeration is the action of cooling, and in practice this requires removal of
heat and discarding it at a higher temperature. Refrigeration is therefore the science
of moving heat from low temperature to high temperature. In addition to
chilling and freezing applications, refrigeration technology is applied in air conditioning
and heat pumps, which therefore fall within the scope of this book. The
fundamental principles are those of physics and thermodynamics, and these principles,
which are relevant to all applications, are outlined in this opening chapter.