Willis H Carrier. Father of Air Conditioning. R V Simha. Keywords. W H Carrier, rational psychro- metric formulae, psychrometric chart, invention of centrifugal. PSYCHROMETRIC CHART. ▫ Identify parts of the chart. ▫ Determine moist air properties. ▫ Use chart to analyze processes involving moist air. 35 40 45 50 0,36 55 Carrier PSYCHROMETRIC CHART NORMAL.

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The dew point is the temperature below which the water vapor in air condenses into liquid water at the same rate at which it evaporates.

Inputs are entered into the program through Windows standard interface with simple “point and click” operation. Psychometric charting and process energy analysis software with unmatched chart presentation quality and accuracy.

The suite features customizable presentation parameters and offers editing tools for the input content adjusting the charts in real time. Thank you for rating the program!

Psychrometrics Made Simple

What is the humidity ratio at this point? An interesting and informative description on Psychrometric Chart Use for livestock and greenhouse applications has been presented in a University of Connecticut website by Michael Darre.

Our built-in antivirus checked this download and rated it as virus free. Gatley, 16 The most relevant gases that psychrometrics examine psychrometgic air and water vapor, as controlling a water vapor-saturated environment is important in the fields of air ventilation, humidification, agriculture, meteorology, etc.

Wet bulb temperature is represented by the diagonal lines that slope from right-to-left. Find the point where the vertical dry-bulb line and the diagonal wet-bulb line intersect.


Android app no longer available. Thompson, 1 The vertical axis is humidity ratio, which indicates how much water vapor is present in the air although this is a ratio, think of it as a number value! The intersection of wet and dry bulb temperatures on the chart, together with the relative humidity line, can be used to determine all psychrometric properties of air.

Also, you can create templates that you can reuse over and over again.

The humidity ratio of this point is approximately. The horizontal axis is air temperature, also known as dry-bulb temperature, which is indicated by the reading of an unwetted bulb in a thermometer.

Now find the diagonal right-to-left line marked 70 degrees, and envision an imaginary line to the degrees vertical line. Both guides reduce the confusion by separately explaining 4 of the 6 sets of curves which make up a psychrometric chart. What is the relative humidity? Experiment with chart at various intersections of humidity ratio and air temperature to perform your own calculations! Find the vertical line on the graph marked — this is the degrees dry-bulb line.

Download psychometric charting software. For this reason a Psychrometric Chart relating all the relevant variables was developed which is extremely useful chxrt designing and evaluating air-conditioning and cooling tower systems. I must warn you—I am going to get a bit technical, and you just might learn something at the end of this paper.

Definitely review both guides before continuing.


The proportion of humidity in the air at a given temperature relative to its maximum. Gatley, 17 Carrier compiled this data to create a descendant of the Psychrometric Chart, called the Hygrometric Chart: What is the dewpoint temperature of the air at 90 degrees Fahrenheit wet-bulb temperature and 80 degrees dry-bulb temperature?


This program was originally created by Hands Down Software. The latest installation package occupies Psycrometric dry bulb air temperature cxrrier reads degrees Fahrenheit and a wet bulb thermometer reads 68 degrees Fahrenheit.

Display a fully customizable psychrometric chart in both landscape and portrait modes.

Chapter 10b: The Psychrometric Chart (Updated 7/22/)

If you are like me, you probably had to read that paragraph a cchart dozen times before you actually began to conceptualize what the chart is conveying. Note the curvature of the graph: Psychometric points, processes and associated energy values are automatically calculated and plotted right on a professional psychometric chart. Other websites that we found interesting is that of Wikipedia on Psychrometrics.

Gatley, 18 Carrier is considered the inventor of modern air conditioning, although like any landmark engineer, he had some help from previous research. Create an unlimited number of psychrometric chart projects. The humidity ratio is the located on the vertical axis. The original Carrier Psychrometric Chart was compiled from empirical data from meteorologist William Ferrel as well as a Professor Marvin. Notice where they meet on the carrer. A cooling of air psychromwtric represents a shift to the left.

One of the most important tools within psychrometrics is the psychrometric chart, invented by Willis H.