Fan Curves - A Deep Dive

Let’s build a fan curve! We’ll start by collecting data on a real fan, and then use the fan laws to extrapolate all the require data. Then we’ll use the curves to size up fans and motors, and along the way we’ll look into efficiencys, safety margins, density, and even system effect. We condensed a wealth of knowledge into 1 video that connects all the dots.

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Watch Part 1 HERE https://youtu.be/vF72pOHc1zY

AC Motors Video Referenced: https://youtu.be/RG3eljmqyq4

00:00 What are Fan Curves?
00:57 Part 1 - Making The Curve
01:53 Making a Master RPM Curve
07:48 K Factor / System Constant
10:13 Plotting RPM Lines
11:11 Horsepower
12:36 Brake Horsepower
13:11 Plotting Horsepower Lines
14:21 Part 2 - Using The Curves
18:52 Motor Basics
24:49 Motor Efficiency
29:53 Fan Energy Index (FEI)
34:31 Density Calculations
40:32 Part 3 - System Effect
41:30 Visualizing System Effect
46:29 Our Approach