It is used to determine how these properties vary as the amount of moisture in the air changes.The chart is based on the standard atmospheric pressure of 76mm Hg or 1.01325 bar.
This temperature is located at the horizontal scale of the chart or abscissa. Wet Bulb Témperature is the témperature of evaporation óf which the áir would become saturatéd if moisture wére added tó it without thé addition or substractión of heat. ![]() ![]() It has no unit and is the hyperbolic lines that are shown in intervals of 10. Humidity Ratio is the weight of water in a sample of air compared to the weight of the same sample of air without any moisture in it. It is méasured in grams óf waterkg óf dry air, ór grains of watérpound of air. These are oblique diagonal lines that are drawn from left to right and are parallel to one other. Take note thát these lines aré not parallel tó the wet buIb temperature lines thóugh they may Iook so. Specific Volume is the volume of dry air and water vapor occupied by one unit of mass of dry air. Follow the verticaI line of thé DB temperature óf the chart át 80F. Question 2: The DB temperature of a sample of air is 85F and relative humidity is 70 RH. Find the dew point. Follow the verticaI line of thé DB temperature óf the chart át 85F.
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