Useful HVAC/R Engineering Reference Materials





Psychrometric Chart Celebrates 100th Anniversary

Written by Donald P. Gatley, P.E., Fellow/Life Member ASHRAE, this ASHRAE Journal article, this article looks at the state-of-the-art of psychrometrics prior to 1904 when Willis H. Carrier produced the first chart and then traces the developments from 1904 to 2004.



“At first glance a psychrometric chart appears ominous with its myriad of tiny lines crisscrossing in every direction. Actually, once understood, this apparent complexity is readily dismissed and the psych chart can become a relatively simple and invaluable design tool.” (Circa 1950) — Julian R. Fellows, emeritus professor of mechanical engineering, University of Illinois.





Overview of Psychrometrics

Written by Dr. S.A. Sherif, this ASHRAE Journal article clearly defines psychrometric properties and describes several psychrometric processes.  Psychrometric processes presented include Sensible Heating or Cooling, Humidification (with heating or cooling), Cooling and Dehumidification, Heating and Dehumidification and Mixing of Airstreams.  Psychrometric analysis examples are provided including Summer Hot - Humid Mode, Summer Hot - Dry Mode and Winter Cold - Dry Mode.





Understanding Psychrometrics

A proper knowledge of psychrometrics is invaluable to any meteorologist, HVAC engineer or system designer, yet many new engineers have little or no training in this fundamental discipline. This text provides a complete education in psychrometrics, in the form of a four-hour learning module that is comprehensive and easy-to-use. It includes definitions of basic psychrometric terms, all algorithms required for psychrometric calculations, conversion factors, and comparative data for ideal gas calculations and Hyland and Wexler NIST formulations. The algorithms can also be input into computers or hand-held programmable calculators to aid engineers in their work. This book is useful to meteorologists, HVAC engineers or system designers as well as to engineering or design firms wishing to train employees on how to use psychrometrics in their work. It functions as both a lifetime reference manual for those new to the field and as a refresher course for those who use psychrometrics on a recurring basis.





Psychrometrics: Theory and Practice

Updated after a critical review of over 500 publications on the subject. Includes latest equations, charts and tables for thermodynamic properties of moist air. Covers various types of hygrometers and psychrometers with selection guidelines for different applications.





Humidity Control Design Guide for Commercial and Institutional Buildings  

This 4-color, hardback book is an easy-to-read, user-friendly manual aimed at HVAC designers concerned with humidity control. It helps to define the purpose of

a humidity control project, and provides information on the effects of humidity on mold, mildew, bacteria, viruses and overall human health and comfort. The text also discusses how humidity control equipment works and the importance of managing air pressure in a building. Schools, office buildings, nursing homes and laboratories are discussed in depth along with other types of buildings. The book provides checklists to help architects, owners, contractors and building and HVAC system designers get the job done quickly and accurately.




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