β Scribed by Roger W. Haines (auth.)
No coin nor oath required. For personal study only.
There are two reasons why we have a new edition every four or five years. The first is that technology changes. Chapter 10, on computer-based conΒ trols, has had to be almost completely rewritten. Fundamentals don't change, but the tools available to us do change. Evaluation and proper use of those tools makes it even more imperative that we understand fundamentals. Many of our control problems stem from the use of new devices as a solution to problems that are, in fact, control design errors. New gadgets, for example, Direct Digital Controls (DDC), will not solve basic problems and may even compound them. None-the-Iess, you will find an extensive discussion of DDC because I think it is the probable "future" in HVAC control. But it must be applied with a good understanding of fundamentals. The second reason is that I keep learning and need to pass on my new and improved understanding to my readers. Thus you will find a number of small but important revisions, a dissertation on control "modes," and a much more detailed discussion of how electronic control devices work. There are a few places where I have corrected what I now perceive to be errors. I apologize for these. I have been much encouraged by the acceptance of this book in the past, and I hope that this new edition will be helpful. Thank you for your support.
Front Matter....Pages i-xv
Control Theory and Terminology....Pages 1-12
Pneumatic Control Devices....Pages 13-40
Electric and Electronic Control Devices....Pages 41-65
Fluidic Control Devices....Pages 66-72
Flow Control Devices....Pages 73-87
Elementary Control Systems....Pages 88-129
Complete Control Systems....Pages 130-192
Electric Control Systems....Pages 193-214
Special Control Systems....Pages 215-239
Supervisory Control Systems....Pages 240-259
Psychrometrics....Pages 260-272
Central Plant Pumping and Distribution Systems....Pages 273-282
Retrofit of Existing Control Systems....Pages 283-298
Back Matter....Pages 299-317
Science, general
π SIMILAR VOLUMES
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