Terminology[ edit ] A psychrometric chart is a graph of the thermodynamic parameters of moist air at a constant pressure, often equated to an elevation relative to sea level. The parameters are: Dry-bulb temperature DBT is that of an air sample, as determined by an ordinary thermometer. It is typically plotted as the abscissa horizontal axis of the graph. The SI units for temperature are kelvins or degrees Celsius ; other units are degrees Fahrenheit and degrees Rankine.
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Easily plot HVAC and other psychrometric processes while out in the field, save the graphs, and then email the graph and results to yourself or clients. As you move your finger around the graph, the psychrometric properties at the top of the screen dynamically update.
In addition, you can double-tap a point to display the point properties and then edit them. Create psychrometric processes by plotting points then connecting them with process lines. Also, create custom labels anywhere on the chart. Email a list of all the points and their properties for a completed chart, along with a PDF of the chart itself. Create an unlimited number of psychrometric chart projects.
Also, you can create templates that you can reuse over and over again. Android app no longer available. The program on the CD allows the user to plot typical psychrometric processes and perform the corresponding energy calculations on-screen, without having to first print out the individual charts.
The program can output a listing of points and processes in a tabular report with calculated properties and energy values for each. Purchase Understanding Psychrometrics, 3rd ed. Understanding Psychrometrics serves as a lifetime reference manual and basic refresher course for those who use psychrometrics on a recurring basis and provides a four- to six-hour psychrometrics learning module to students; air-conditioning designers; agricultural, food process, and industrial process engineers; meteorologists and others.
This second edition, available in both I-P and SI units, provides clear understanding of the state of the art in heating and cooling load calculation methods.
Psychrometric chart (SI Units) (pdf)