tailieunhanh - Ebook Refrigeration and Air-Conditioning (4th Edition): Part 1 - G. F. Hundy , A. R. Trott, T. C. Welch

New material in this edition includes the latest developments in refrigerants and lubricants, together with updated information on compressors, heat exchangers, liquid chillers, electronic expansion valves, controls and cold storage. Topics also covered include efficiency, environmental impact, split systems, retail refrigeration (supermarket systems and cold rooms), industrial systems, fans, air infiltration and noise. This book is divided into 2 parts, part 1 includes the following contents: Fundamentals, the refrigeration cycle, refrigerants, compressors,. | Fourth Edition Refrigeration and Air Conditioning B H Preface Refrigeration and air-conditioning absorb about 15 of the UK s electrical generation capacity and it is not always appreciated that refrigeration technology is essential to our modern way of life. Without it distribution of food to urban areas may not be possible. In a typical office air conditioning can account for over 30 of annual electricity consumption yet who cares about checking the system to find out if it is working efficiently Reducing the environmental impact of cooling whilst at the same time maintaining and expanding expectations is the driver of many of the developments which have been made since the last edition of this book. Aimed at students and professionals in other disciplines not too theoretical but with sufficient depth to give an understanding of the issues this book takes the reader from the fundamentals through to system design applications contract specifications and maintenance. Almost every chapter could be expanded into a book in itself and references are provided to assist those wishing to delve deeper. Standards and legislation are subject to change and readers are recommended to consult the Institute of Refrigeration website for the latest developments. This edition gives an up-to-date appreciation of the issues involved in refrigerant choice efficiency load reduction and effective air conditioning. Managing heat energy is going to be crucial in the UK s quest to reduce carbon emissions -and managing heat rather than burning fuel to generate more of it is what heat pumps do. Refrigeration technology has a potentially huge role to play in heating which is where a very large proportion of the UK s energy is spent. In navigating this book you should be guided by the context of your interest but at the same time develop an awareness of related topics. Most real problems cross boundaries which are in any case difficult to define and some of the most exciting developments have .