The Refrigeration Cycle

Introduces the basic concepts needed for an understanding of refrigeration. Traces the basic refrigeration cycle. Explains the concepts of heat, temperature, humidity, dewpoint, enthalpy, and simple psychrometrics. Concludes with a lesson on the tools and instruments needed for refrigeration servicing and safe work practices. This course has no prerequisites. The Refrigeration Cycle is available in online maintenance training and course manual formats. Lesson 1 - Refrigeration and Air Conditioning Basics Topics: Definition of refrigeration and air conditioning; Composition of matter; States of matter Learning Objectives: – Define refrigeration and air conditioning and explain how they differ. – Describe the two methods of lowering the temperature of a material. – Name the three physical states of matter. – Identify what causes matter to change its state. Lesson 2 - Heat, Pressure, and Change of State Topics: Heat;