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Purchase Understanding Psychrometrics, 3rd ed. Industries that use these materials are concerned with relative humidity control in production and storage of such materials.
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This property of air-water vapor systems simplifies drying and cooling unigs often performed using psychrometic relationships. The value indicated by a wet-bulb thermometer often provides an adequate approximation of the thermodynamic wet-bulb temperature. Each line represents asjrae constant temperature. Mixtures of air and water vapor are the most common systems encountered in psychrometry. Archived from the original on Architectural acoustics Architectural engineering Architectural technologist Building services engineering Building information modeling BIM Deep energy retrofit Duct leakage testing Environmental engineering Hydronic balancing Kitchen exhaust cleaning Mechanical engineering Mechanical, electrical, and plumbing Mold growth, assessment, and remediation Psychrometirc reclamation Testing, psycheometric, balancing.Īnalogous to the specific volume of a pure substance.Ī chart is valid for a given air pressure or elevation above sea level. You show a ‘Virtual’ Temperature under Thermodynamic properties. In many industrial applications it is important to avoid condensation that would ruin product or cause corrosion. This quantity is also known as the water vapor density. The horizontal component of the condition line is the change in sensible heat while the vertical charr is the change in latent heat.Īrchived copy as title Webarchive template wayback links. It is not to be pscyhrometric with Psychometry. Not to be confused with Psychometricsa discipline of psychology and education. The psychrometric ratio is the ratio of the heat transfer coefficient to the product of mass transfer coefficient and humid heat at a wetted surface. This is the t -axis, the abscissa horizontal axis. ASHRAE Fundamentals Handbook (SI) Mass of water added per unit mass of dry air is (W.* – W), which. ASHRAE PSYCHROMETRIC CHART NO NORMAL TEMPERATURE.