Refrigeration, Air Conditioning and Heat Pumps, Fifth Edition
In this fifth revision I have included further information about developments and innovations whilst at the same time retaining the fundamentals and depth of technical detail. The addition of heat pumps to the title reflects the fact that heating provision using refrigeration technology is now a serious contender in many situations. A further area of innovation is integrated heating and cooling whereby previously discarded heat is utilized or raised to a temperature where it can be utilized.
Refrigeration is all about moving or ‘pumping’ heat from a lower to a higher temperature. The task of refrigeration engineers is to achieve this movement of heat with the lowest power consumption in a cost-effective manner. This is always a trade-off, but innovative technology is delivering advances. This has to be set against a background of environmental impact. Many effective refrigerants contribute to global warming if released to atmosphere, and improved containment together with legislation regarding the usage of these substances has impelled developments.
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The industry has paved the way for these constraints by developing new, less-damaging chemicals, and showing how other so-called ‘natural’ products can be used in applications where they were previously considered unsafe or just impractical. Standards, good practice guides, and training, all supported by industry, are vital components of this story, which is continuing today. A.R. Trott designed this book to give an appreciation of the subject, building on the unchanging fundamentals in a logical way. This was further developed by T.C. Welch, and I am indebted to both these authors for developing this approach.
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