Chapter 6 Basic Refrigeration Systems 89 2 Technical Terms accumulator compressor condenser evaporator filter-drier flash gas forced-air condenser forced-draft evaporator high side high-side pressure liquid line liquid receiver low side low-side pressure metering device natural-convection condenser natural-draft evaporator oil separator reciprocating refrigerant suction line superheated Review of Key Concepts Reviewing these concepts from earlier chapters will help you understand new concepts presented in this chapter: • Evaporation is a process that absorbs heat into the evaporating substance. Condensation is a process that releases heat from a condensing substance. (Chapter 4) • An increase in pressure raises a substance’s boiling point, and a decrease in pressure lowers a substance’s boiling point. (Chapter 5) • In a fixed volume, an increase in a gas’s pressure will increase its temperature. A decrease in pressure will decrease a gas’s temperature. (Chapter 5) Introduction The purpose of any refrigeration system is to remove heat from a space where it is not wanted. The two most popular methods of producing refrigeration are com- pression and absorption. Absorption refrigeration sys- tems will be discussed in later chapters. This chapter will introduce the basics of how a compression refrigeration system operates and explain the purpose of each compo- nent in the system. Video • Basic Refrigeration System