Psychrometrics uses thermodynamic properties to analyzeconditions and processes involving moist air. This chapter discusses perfectgas relations and their use in common heating, cooling, and humidity controlproblems. Formulas developed by Herrmann et al. (2009) may be used wheregreater precision is required.

Composition of Dry and Moist Air
U.S. Standard Atmosphere
Thermodynamic Properties of Moist Air
Thermodynamic Properties of Water at Saturation
Humidity Parameters
Perfect Gas Relationships for Dry and Moist Air
Thermodynamic Wet-Bulb and Dew-Point Temperature
Numerical Calculation of Moist Air Properties
Psychrometric Charts
Typical Air-Conditioning Processes
Transport Properties of Moist Air
Symbols

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