HVAC Control in the New Millennium by Michael F. Hordeski
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HVAC Control in the New Millennium by Michael F. Hordeski


Chapter 1: Heat, Ventilation and Damper Control Trends.

Chapter 2: Energy and Power Management, Distributed Control Trends.

Chapter 3: Control Technology, Microelectronics and Nanotechnology.

Chapter 4: Advanced HVAC Control, Information Technology and Open Systems.

Chapter 5: PC-based Control, Software and Bus Trends.

Chapter 6: Artificial Intelligence, Fuzzy Logic and Control.

Chapter 7: Computer Networks and Security.

Chapter 8: Systems and Device Networks.

Chapter 9: Building Automation, Wireless Technology and the Internet.


Building conditioning is changing rapidly as we enter the new millennium. Advances in personal computer control and sensor technology will lead the advances in building controls. Some of these techniques are just emerging in major industrial automaion projects. Pushing the technology along are potentially high reductions in operating costs from the increased efficiency of operation. PC-based control, Internet/Intranet and other computer technologies will bring many changes and challenges to those involved in HVAC systems automation. This book investigates how the latest advances in distributed technology will be used in commercial systems. It analyzes the impact of this technology on HVAC control strategies and operator interfaces including future concepts of human/machine interfaces. The potential benefits of improved technology mean additional energy and cost savings. Based on recent and upcoming standards HVAC control strategy may evolve with changing needs linked to plant-wide enterprise systems.

These distributed HVAC systems provide the wide area technology needed for HVAC system remote access and Internet work communications. There are major improvements to be gained by intelligent field devices along with increased system integration. Smarter systems will use extracted data to build databases and provide automatic piping, electrical and instrumentations drawing on-line, even via remote terminals on the Internet. Advances in microtechnology will provide economic and environmental advantages for space heating. The air in a room may be heated and cooled more efficiently using small channels of micro heat pumps. Real-time environmental sensors will monitor workplace air quality and minimize lost work hours due to sick-building syndrome.

Embedded Web technology and improved real-time operating systems will operate via the Internet or plant-wide Intranets. The use of wireless LANs may double or even triple over the next few years. Wireless LANs allow maintenance workers to report problems using wireless scanners, portable computers and other hand-held devices. Improved efficiency is possible by applying control concepts such as ratio and feed-forward control. Further HVAC system improvement and optimization may be accomplished with advanced modeling and simulation techniques which are used to develop alternate solutions and allow comparative analysis. The computer evolution is on an upward spiral, which concerns the nature of intelligence, its significance and its ultimate realization in machines that will cause the world to be transformed. Future HVAC systems will involve mixing intelligent and non-intelligent devices. Intelligent systems technology, such as fuzzy logic, expert systems and neural networks will find practical applications to provide intelligence for control management and optimization.

Fuzzy logic will be used in supervisory controllers based from operator experience and experimental results rather than mathematical models. While traditional control and the computer code used to implement it relies heavily on absolutes like true/false, yes/no or on/off conditions, fuzzy logic employs a more human way of thinking about a problem. This book is about a future which involves a transformation of living and working habits at many levels.