How To Read Psychrometric Chart !!hot!!

The psychrometric chart is a graph of the physical and thermal properties of air. Learning to read it is like gaining X-ray vision: you can calculate exactly what happens when air cools, heats, humidifies, or dries. Here is your step-by-step guide to decoding this essential diagram.

Let’s plot a real example:

Typically outside the Saturation Curve, extending diagonally. Orientation: Diagonal lines. Enthalpy represents total heat energy. In many charts, these lines are very close to the Wet Bulb lines. You read them by locating your point on the chart, extending a line parallel to the enthalpy guides, and reading the value (usually in BTU/lb) off the scale. how to read psychrometric chart

You run air through a cooling coil but do not remove water (no condensation). Your point moves straight left along a horizontal line. Dry-bulb drops. Humidity ratio stays constant. Relative humidity rises. The psychrometric chart is a graph of the