CEM 350 - Facility Systems Design and Construction

Psychrometric Curve

Instructions

Read the Given information and find the appropriate lines on the Psychrometric Chart. When you click on these lines they will change their width. Find where the lines intersect. Then find the corresponding lines near the point of intersection for the values you need to determine. Follow them to the corresponding scale to determine the value for that parameter. You may need to do some interpolation. You can click the Reset Chart button to set the lines back to their default width. Click the Check Answers button to see how you did. Read the definitions of the parameters depicted on the chart to assist you in completing this activity.


Given:

  • 70° Dry Bulb Temperature
  • 50% Relative Humidity

Determine:

  • Wet bulb temperature degrees
  • Absolute Humidity grains/lb
  • Enthalpy Btu/lb
  • Specific Volume ft3/lb
  • Dew point degrees

Hint: 1 grain = 1/7000 lb

   

Chart Key: