TRG-TRC003-EN iii
Contents
period one Heat and Refrigeration .......................................1
What is Heat? .........................................................2
Principles of Heat Transfer ......................................4
period two Refrigerants ............................................................ 9
Change of Phase ................................................... 12
Modern Refrigerants .............................................16
period three Refrigeration Cycle ............................................ 17
Closing the Cycle ..................................................18
Basic Refrigeration System ....................................22
period four Pressure–Enthalpy Chart ................................. 26
period five Review ...................................................................35
Quiz ......................................................................... 39
Answers ................................................................42
Glossary ................................................................44