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Psychrometrics serves as a lifetime reference manual and a basic refresher course for those who use psychrometrics on a recurring basis and provides a four- to six-hour complete psychrometrics learning module to students, air-conditioning designers, agricultural, food process, and industrial process engineers; meteorologists, and others.
In addition, this text includes a history of psychrometrics. Other tools provided are:
• comparative data for ideal gas calculations based on the ASHRAE RP-1485 (2009) Real Moist Air Psychrometric model
• all of the Ideal Gas model algorithms required for psychrometric calculations, including barometric pressure vs. altitude and the formulas for wet-bulb and dew-point temperatures below freezing
NEW IN THE THIRD EDITION:
The third edition of Understanding Psychrometrics has been updated and includes:
Revised chapters for wet-bulb temperature and relative humidity and a revised Appendix V that includes a summary of ASHRAE Research Project RP-1485
New constants for the universal gas constant based on CODATA and a revised molar mass of dry air to account for the increase of CO2 in Earth's atmosphere
New IAPWS models for the calculation of water properties above and below freezing
New tables based on the ASHRAE RP-1485 real moist-air numerical model using the ASHRAE LibHuAirProp add-ins for Excel®, MATLAB®, Mathcad®, and EES®
Note: The previous edition included a CD with 25 different psychrometric charts and the author's hw.exe program. These extras are now available online as described on page xvi. The online extras also include a limited demonstration version of the ASHRAE LibHuAirProp add-in that allows users to duplicate portions of the real moist-air psychrometric tables in the ASHRAE Handbook—Fundamentals for both standard sea level atmospheric pressure and pressures from 5 to 10,000 kPa.
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