Moist air properties

Example 2 Determination of Moist Air Properties Find the properties of moist air when the dry-bulb temperature is 80 F and the wet-bulb temperature is 67 F. 

ASHRAE Standard 41.6-1994. Measurement of Moist Air Properties. American Society of Heating, Refrigerating, and Air-conditioning Engineers, Atlanta, 1994. 

P. Gandhidasan j I When engineers need to evaluate the values of moist-air properties, they generally refer to psychrometric charts or tables. 

The nomograph presented here can be used to estimate several moist-air properties at a glance, if any two pieces of information are known. Standard atmospheric pressure is assumed. 

Example 7 Determination of Moist Air Properties An air-water mixture is found from the heat and mass balance to he at 60 C (333 K) and 0.025 kg/kg (25 g/kg) absolute humidity. Calculate the other main parameters for the mixture. Take atmospheric pressure as 101,325 Pa. 

Drying kinetics was represented by a diffusive model. The models were completed with water sorption equilibrium equation, expressions for product and moist air properties, correlations for convective heat and mass transfer coefficients, and the kinetics of drying and of the selected quality changes in the product as functions of water content and temperature (Di Scala and Crapiste, 2005). Experimental data were obtained from Di Scala and Crapiste (2005) and Roura et al. (2001). 

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