Airflow

Selection of AIR FLOW to cool an apparatus

P : represents the power to be dissipated (in watts)

Δt : represents the temperature difference between internal temperature of the equipment and ambient temperature

Q : represents the air flow of the fan = P(w)1.2XΔt L/s

THE AIR FLOW IS DETERMINED BY THE PROJECTION ON THE GRAPH BELOW FROM THE INTERSECTION POINT OF THE LINES AND Δt ON THE AIR FLOW SCALE.

Example given a power to dissipate of 400 W and t of 10℃

REQUIRED AIR FLOW TO COOL = 34 L/s = 72 CFM

Conversion Chart

(CFM = L/s x 0.0353 x 60)

Air Measurement
Table of Temperature Vs. Air Flow
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