How To Use Psychrometric Chart

Psychrometric chart identify parts of the chart determine moist air properties use chart to analyze processes involving moist air. Pick any 2 known measurements available and plot them on the chart where the lines intersect. On the psychrometric chart locate value 78of on the db temperature scale located at the bottom of the chart.

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How To Read A Psychrometric Chart 11 Steps With Pictures

Chapter 10b The Psychrometric Chart Updated 7 22 2014

Psychrometric Chart Barometric Pressure 29 921 Inches Of Mercury

The key is to determine which interest.

How to use psychrometric chart. A rh b tdp c hr d v e h. Theory and application perry peralta nc state university. Example showing how to use psychrometric chart.

The psychrometric chart comprises a dry bulb temperature scale on the horizontal axis moisture ratio scale on the vertical axis. Extend the vertical line constant db temperature line from 78o and the diagonal. Locate the dry bulb tem perature along the bottom axis and the associated vertical line for each temperature.

Normally you should give preference to measurements of dry temperature absolute humidity dew point or vapor pressure. When solving a problem involving a psychrometric chart you only need 2 measurements to read the chart. Another psychrometric chart use we use the psychro chart in an entirely different way.

Properties of moist air on a psychrometric chart. To detect air temperature and humidity problems you also need to understand how the psychrometric chart works. It represents a curved boundary saturated air or 100 percent moisture retention capacity.

In broader terms it is the science and practices associated with atmospheric air mixtures their control and the effect on materials and human comfort. Autoplay when autoplay is enabled a suggested video will automatically play next. Comments are turned off.

In this video detail method to draw psychrometric chart is explained. The psychrometric chart and its use psychrometry is an impressive word which is defined as the measurement of the moisture content of air. Some practice with examples will help.

Locate the humidity ratio along the right vertical axis. Locate wb temperature of 65of on the saturation curve scale. This guide is an easy 8 step framework designed to demystify the psychrometric chart.

Use figures 2 and 3 with the psychrometric chart in figure 1 to verify whether you can find each air property. Wet bulb temperature and enthalpy use the same chart line but values are read off seperate scales. Using the chart variation that has passive strategies and a comfort zone mapped on it as the initial phase of passive solar nze design we chart monthly temps and humidities on the chart and instantly get a graphic which tells us what passive strategies are appropriate to make a comfortable nze building.

This scale will be in degrees f or degrees c. T 25 c tw 20 c required.