Energy Saving Examples; Why Use A Frequency Converter For Controlling Fans And Pumps; The Clear Advantage - Energy Savings - Danfoss VLT DriveMotor FCM 106 Design Manual

Application Examples
the width of the resonance peak. In most
situations, it is possible to hear the resonance.

4.2 Energy Saving Examples

4.2.1 Why use a Frequency Converter for
Controlling Fans and Pumps?
A frequency converter takes advantage of the fact that
4 4
centrifugal fans and pumps follow the laws of propor-
tionality for such fans and pumps. For further information
see chapter 4.2.3 Example of Energy Savings.

4.2.2 The Clear Advantage - Energy Savings

The clear advantage of using a frequency converter for
controlling the speed of fans or pumps lies in the
electricity savings.
When comparing with alternative control systems and
technologies, a frequency converter is the optimum energy
control system for controlling fan and pump systems.
100
80
60
40
20
0 20
Illustration 4.5 The graph is Showing Fan Curves (A, B, and C)
for Reduced Fan Volumes.
38
VLT
A
SYSTEM CURVE
FAN CURVE
B
C
40 60 80 100 120 140 160
VOLUME%
®
DriveMotor FCP 106 and FCM 106 Design Guide
120
100
80
60
40
20
0
20
120
100
80
60
40
ENERGY
20
CONSUMED
0 20
Illustration 4.6 When using a frequency converter to reduce
fan capacity to 60% - more than 50% energy savings may be
obtained in typical applications.
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MG03M102 - 08/2015
A
SYSTEM CURVE
FAN CURVE
B
C
40 60 80 100 120 140 160
Voume %
40 60 80 100 120 140 160
Voume %
180
180