Selection Procedure:

  1. Determine input power in watts per square feet by dividing the
    heat dissipated in the enclosure (in watts) by the enclosure
    surface area (in square feet).
  2. Locate on the graph the appropriate input power on the
    horizontal axis and draw a line vertically until it intersects the
    temperature rise curve.
  3. Read horizontally to determine the enclosure temperature rise


What is the temperature rise that can be
expected from a 48″ x 36″ x 16″ enclosure with 300 watts of heat
dissipated within it?


Surface Area = 2[(48×36) + (48×16) + (36×16)] divided by 144 =
42 square feet

Input Power = 300/42 = 7.1 Watts/SqFt.

From Curve: Temp. Rise = 30°F (16.7°C)


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