Refrigeration and its application, especially its use in air-conditioning, is met in almost every branch of industry, so that practitioners in other fields find that they have to become aware of its principles, uses, possibilities and limitations. This book aims to introduce to students and to professionals in other disciplines the fundamentals of the subject in a simple way without involving the reader too deeply in theory. This revised edition contains new sections on the design of systems and operating economy while other sections have been revised and expanded. The book covers the main uses and types of equipment also gives worked examples of many practical applications, showing the options that are available for the solution of problems in mechanical cooling systems. Particular emphasis is laid on the selection of energy-efficient equipment.