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Ask the Professor: Learn, Refresh Your Knowledge of HVAC Principles

Ask the Professor: Learn, Refresh Your Knowledge of HVAC Principles

From Insights, January 2022

One semester’s worth of HVAC principles is now updated and ready for use.

The ninth edition of Principles of Heating, Ventilating, and Air Conditioning, has been released with the most current ASHRAE procedures and definitive, yet easy to understand, treatment of building HVAC systems. The textbook is based on content from all four volumes of the ASHRAE Handbook, especially the 2021 ASHRAE Handbook—Fundamentals.

Now divided into three parts—general concepts, HVAC systems and online supplement materials—most chapters in the latest edition of Principles of Heating, Ventilating, and Air Conditioning include new problems and solutions that have been updated to be in sync with the 2021 ASHRAE Handbook—Fundamentals, said Kevin Amende, P.E., Member ASHRAE, an associate professor at Montana State University’s Department of Mechanical & Industrial Engineering and one of the authors of the latest edition.

“Emphasis was placed on creating new, easy-to-follow examples for space and system load calculations that provide continuity throughout the textbook,” he said.

This edition includes several significant changes, including: 

  • The first chapter has been revised to provide not just history but also updated information regarding current trends and the possible future of the HVAC industry.
  • The “Thermodynamics and Psychrometrics” chapter has been reorganized, and materials on psychrometrics—including additional psychrometric charts covering low temperatures and higher elevations—have been included.
  • The “System Loads” chapter reflects reorganization to better walk the user through the calculation process used by professionals.
  • The “Energy Estimating Methods” chapter has been streamlined to better reflect the current processes used by energy modelers and connects energy estimation with load calculations presented in the textbook.
  • The “Duct and Pipe Sizing” chapter includes expanded information, tables and charts used for hydronic pipe sizing with updated example problems, allowing for more thorough topic coverage.
  • The “Hydronic Heating and Cooling System Design” chapter includes updated general content based on the latest design trends and requirements as well as expanded information on typical hydronic heating/cooling equipment and system types.

“This publication is most suitable for undergraduate engineering courses in the general field of HVAC, similar courses at technical institutes, continuing education and refresher short courses for engineers and adult education courses for non-engineers,” said Amende. “This text will also readily aid in self-instruction of the 2021 ASHRAE Handbook—Fundamentals by engineers wishing to develop their competence in the HVAC&R field.”

Diverging from previous editions of this textbook, materials not typically covered in a one-semester course have been removed from the print version but are available as supplemental online content. This online-exclusive material includes multiple versions of the psychrometric chart not found in previous versions and information on the following topics:

  • Air-Processing Equipment
  • Cogeneration and Heat Recovery Systems
  • Design Conditions
  • Economic Analyses and Life-Cycle Costs
  • Fitting Loss Coefficients
  • Heat Exchanger Equipment
  • Heating Equipment
  • Panel Heating and Cooling Systems
  • Psychrometric Charts
  • Radiant Times Series (RTS) Method
  • Refrigeration Equipment
  • Systems Design Problems