How To Use Psychrometric Chart

Comments are turned off. Normally you should give preference to measurements of dry temperature absolute humidity dew point or vapor pressure. Another psychrometric chart use we use the psychro chart in an entirely different way.

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How To Read A Psychrometric Chart 11 Steps With Pictures

Chapter 10b The Psychrometric Chart Updated 7 22 2014

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How to use psychrometric chart. Use figures 2 and 3 with the psychrometric chart in figure 1 to verify whether you can find each air property. Locate wb temperature of 65of on the saturation curve scale. A rh b tdp c hr d v e h.

It represents a curved boundary saturated air or 100 percent moisture retention capacity. Properties of moist air on a psychrometric chart. T 25 c tw 20 c required.

The psychrometric chart and its use psychrometry is an impressive word which is defined as the measurement of the moisture content of air. When solving a problem involving a psychrometric chart you only need 2 measurements to read the chart. On the psychrometric chart locate value 78of on the db temperature scale located at the bottom of the chart.

The key is to determine which interest. 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. In this video detail method to draw psychrometric chart is explained.

In broader terms it is the science and practices associated with atmospheric air mixtures their control and the effect on materials and human comfort. Pick any 2 known measurements available and plot them on the chart where the lines intersect. This scale will be in degrees f or degrees c.

Extend the vertical line constant db temperature line from 78o and the diagonal. Example showing how to use psychrometric chart. Wet bulb temperature and enthalpy use the same chart line but values are read off seperate scales.

This guide is an easy 8 step framework designed to demystify the psychrometric chart. Locate the dry bulb tem perature along the bottom axis and the associated vertical line for each temperature. To detect air temperature and humidity problems you also need to understand how the psychrometric chart works.

Psychrometric chart identify parts of the chart determine moist air properties use chart to analyze processes involving moist air. Theory and application perry peralta nc state university. Locate the humidity ratio along the right vertical axis.

The psychrometric chart comprises a dry bulb temperature scale on the horizontal axis moisture ratio scale on the vertical axis. Some practice with examples will help.