How To Read A Psychrometric Chart Access

| Action | Procedure | Result | | :--- | :--- | :--- | | | Find 80°F on bottom axis. Draw line up. | Vertical line at 80. | | 2. Plot WBT | Find 67°F on saturation curve. Follow diagonal down-right. | Diagonal line through 80°F vertical. | | 3. Intersection | Mark the crossing point. | State Point "A". | | 4. Read RH | See which RH curve passes through Point A. | 50% RH | | 5. Read HR | Move right from Point A to Y-axis. | 0.011 lb water / lb dry air | | 6. Read DPT | Move left from Point A to 100% RH curve; drop down. | 60°F | | 7. Read Enthalpy | Follow diagonal from Point A to left scale. | 31.4 BTU/lb |

Dry Bulb = 80°F, Wet Bulb = 67°F.

These lines look very similar to Wet Bulb lines (diagonal). Enthalpy represents the total heat content of the air (sensible heat + latent heat). how to read a psychrometric chart

Moving up and to the left along a constant Wet-Bulb line . The dry-bulb temperature drops, but the moisture content increases. 4. Why This Matters | Action | Procedure | Result | |