Theory of Fan Rating Test

Machine set up

duct fan pitot tube on off

Control Elements

To start the experiment click the "Start" button

Instruction

  1. Enter diameter and length of the duct. Click OK.
    • Diameter of the duct should be between 0.50 and 0.55.
    • Length of the duct should be between 4.00 and 4.20.
  2. Click on flow control device and start the fan by click the green button on switch board. Then click "Start Traversing" button.
  3. Take three velocity readings.
  4. Stop the fan by clicking red button on the switch board.
  5. Click on "Measure" button and "Efficiency" button. Then click on "Add result to the Observation table" button. Table will be created with all the values.
  6. Click on "OK" button for another reading.
  7. Repeat from step 3 to step 7. Take 5 reading.
  8. Graph will be displayed on click "Plot Graph" and "Best Fit"