A convenient, precise and customizable psychrometric chart & calculator tool for 25 26 27 28 29 30 m^3/kg(d.a) 10% 20% 30% 40% 50% 60% 70%. Psychrometrics, psychrometry, and hygrometry are names for the field of engineering . The ASHRAE-style psychrometric chart, shown here, was pioneered by. Use chart to analyze processes involving moist Psychrometric chart: Example 1 . Given: T = 25°C . m wide x m long, and the boards are separated by.

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The psychrometric chart allows all the parameters of some moist air to be determined from any three independent parameters, one of which must be the pressure. Cookies make wikiHow better.

By continuing to use our site, you agree to our cookie policy. Try to be lsychrometric exact as possible when using the chart to read other measurements, and mark your answers in the proper units for that measurement.

Reading Health Print Edit Send fan mail to authors. The DB temperature increases from the left to the right. The range is from 0 for dry air up to 0. Humid heat is the constant-pressure specific heat of moist air, per unit mass of the dry air. 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, iyve remediation Refrigerant reclamation Testing, adjusting, chqrt.


Use the horizontal lines extending from this axis to trace the humidity chhart throughout the chart. Archived copy as title Webarchive template wayback links. These intersect the saturation curve at DBT point. The accuracy of a simple wet-bulb thermometer depends on how fast air passes over the bulb and how well the thermometer is shielded from the radiant temperature of its surroundings.

Free Online Interactive Psychrometric Chart

These are not parallel to wet bulb temperature lines. The “Mollier i – x ” Enthalpy – Humidity Mixing Ratio diagram, developed by Richard Mollier in xhart, [12] is an alternative psychrometric chart, preferred by many users in Scandinavia, Eastern Europe, and Russia.

Chapter 2, Measurement of Temperature. Knowing both the dry-bulb temperature DBT and wet-bulb temperature WBTone can determine the relative humidity RH from the psychrometric chart appropriate to the air pressure. Just to the right of the Y-axis, find the line with the dew point measurement in degrees Fahrenheit or Celsius. Changes in statesuch as when two air streams mix, can be modeled easily and somewhat graphically using the correct chaft chart for the chsrt air pressure or elevation relative to sea level.

Specific humidity is defined as the proportion of the mass of water vapor and mass of the moist air sample including both dry air and the water vapor ; it is closely related to humidity ratio and always lower in value.

However, in psychrometrics, the term quantifies the total volume of both the dry air and water vapour per unit mass of dry air. The Mollier diagram coordinates are enthalpy and humidity ratio.


This article was co-authored by our trained team of editors and researchers who validated it for accuracy and comprehensiveness. The outermost curve along the left side indicates the Wet Bulb WB temperature scale. Such substances include cotton, paper, cellulose, other wood products, sugar, calcium oxide burned lime and many chemicals and fertilizers.

What is Psychrometric Chart? Introduction to Reading the Psychrometric Properties of Air

When solving a problem involving a psychrometric chart, you only need 2 measurements to read the chart. Thanks for letting us know. The enthalpy coordinate is skewed and the lines of constant enthalpy are parallel and evenly spaced. The air in contact with the windows will become colder until the dew point is reached.

Help answer questions Learn more. Already answered Not a question Bad question Other. Look along the bottom of the chart to find the dry bulb temperature. This property of air-water vapor systems simplifies drying and cooling calculations often performed using psychrometic relationships. Find the diagonal enthalpy scales surrounding the chart.

Industries that use these materials are concerned with relative humidity control in production and storage of such materials.