Humidity chart for

Fig. 3. Humidity chart for the ait—water system, molal quantities. To convert kj to Btu, divide by 1.054 to convert cm to fT, multiply by 35.31 X 10 ...

FIG. 12-4 Humidity chart for air-water vapor mixtures. To convert British thermal units per pound to joules per Idlo-gram, multiply by 2326 to convert British thermal units per pound dry air-degree Fahrenheit to joules per Idlogram-kelvin, multiply hy 4186.8 and to convert cubic feet per pound to cubic meters per kilogram, multiply by 0.0624. 

Humidity charts for other solvent vapors may be prepared in an analogous manner. There is one important difference involved, however, in that the wet-bulb temperature differs considerably from the adiabatic-saturation temperatures for vapors other than water. 

Figures 12-37 to 12-39 show humidity charts for carbon tetrachloride, oenzene, and toluene. The lines on these charts have been calculated in the manner outlined for air-water vapor except for the wet-bulb-temperature lines. The determination of these hnes depends on data for the psychrometric ratio /j Z/c, as indicated by Eq. (12-22). For the charts shown, the wet-bulb-temperature hnes are based on the following equation ...

FIGURE 23.1 Humidity chart for mixtures of air and water (pressure of 101.325 kPa). 

HUMIDITY CHARTS FOR SYSTEMS OTHER THAN AIR-WATER. A humidity chart may be constructed for any system at any desired total pressure. The data required are the vapor pressure and latent heat of vaporization of the condensable component as a function of temperature, the specific heats of pure gas and vapor, and the molecular weights of both components. If a chart on a mole basis is desired, all equations can easily be modified to the use of molal units. If a chart at a pressure other than 1 atm is wanted, obvious modificatioi in the above equations may be made. Charts for several common systems besides air-water have been published. ... 

Figure 9.3-2. Humidity chart for mixtures of air and water vapor at a total pressure of 101.325 kPa 760 mm Hg). (From R. E. Treybal, Mass-Transfer Operations, 3rd ed. New York McGraw-Hill Book Company, 1980. With permission.)...

The enthalpy of saturated air is plotted versus 7] on an // versus T plot as shown in Fig. 10.5-3. This enthalpy is calculated with Eq. (9.3-8) using the saturation humidity from the humidity chart for a given temperature, with 0°C (273 K) as a base temperature. Calculated values are tabulated in Table 10.5-1. 

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