Psychrometrics , psychrometry , and hygrometry are names for the field of engineering concerned with the physical and thermodynamic properties of gas-vapor mixtures. Although the principles of psychrometry apply to any physical system consisting of gas-vapor mixtures, the most common system of interest is the mixture of water vapor and air, because of its application in heating, ventilation, and air-conditioning and meteorology. In human terms, our thermal comfort is in large part a consequence of not just the temperature of the surrounding air, but because we cool ourselves via perspiration the extent to which that air is saturated with water vapor. Many substances are hygroscopic , meaning they attract water, usually in proportion to the relative humidity or above a critical relative humidity. Such substances include cotton, paper, cellulose, other wood products, sugar, calcium oxide burned lime and many chemicals and fertilizers.
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The psychrometric chart below is made for standard atmospheric conditions. The psychrometric chart is made with the PsycPro software available from www. From the chart - the saturation temperature is approximately 61 o F and that the humidity ratio is approximately 66 grains of moisture per pound of dry air.
Air with saturation temperature 63 o F and dry bulb temperature 7 5 o F can be visualized in the psychrometric chart as. Add standard and customized parametric components - like flange beams, lumbers, piping, stairs and more - to your Sketchup model with the Engineering ToolBox - SketchUp Extension - enabled for use with the amazing, fun and free SketchUp Make and SketchUp Pro.
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Psychrometric Chart - Barometric Pressure English Imperial units with wet bulb and dry bulb temperature and relative humidity barometric pressure Tag Search en: psychrometric chart air moisture relative humidity wet bulb dry temperature.
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