The textbook discusses the theory of refrigeration technology: the basics of technical thermodynamics, methods for obtaining low temperatures, reverse reversible cycles, thermodynamic properties of refrigerants and refrigeration machine cycles. Structural description of refrigerating machines and plants is given. Calculation methods and equipment selection. The technology of production of consumers of artificial cold and technological processes of waste disposal and environmental protection are described. Methods of design of refrigerators and refrigerating plants for enterprises of food industry, trade and public catering are given. Installation and maintenance of modern refrigeration machines. The manual is intended for students of technical universities and colleges, for specialists involved in the design, installation and operation of refrigeration machines and installations.