Energy Saving Solutions for Fresh Air Supply Taking Supply Air for Buildings as an Example
The supply air system consists of a total of 96 individual fans installed on the roofs of the factory halls.
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Saving energy with controlled energy efficient motors and
MOVIDRIVE® inverters with energy saving function
The example shows the supply air system of a production hall
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Previously, the fans were driven by pole-changing motors directly via belts. Variant 3 is the most energy saving retrofitting measure with DVE energy efficient motors and MOVIDRIVE® inverters with energy saving function. Complete retrofitting to the new drives will already pay off after 2.7 years. This calculation does not yet include the additional advantage of greater availability and lower maintenance costs of a "new" system.
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Comparison between standard variant and optimization solution |
Project variants
with 96 building fans each |
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Variant 1 |
Variant 2 |
Variant 3 |
Motors |
Pole-changing asynchronous motors & fan adjustment |
Controlled DV160L4 standard motors |
Controlled DVE160L4 energy-efficient motors |
Frequency inverters |
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Frequency inverters |
MOVIDRIVE® with energy-saving function |
Investment/components |
0 % (existing) |
89 % |
100 % |
Energy costs/year |
675,000,- € |
615,500,- € |
580,000,- € |
Energy consumption |
116 % |
106 % |
100 % |
Amortization of additional costs after |
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approx. 3.9 years |
approx. 2.7 years |
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* Basis for calculation: 7,200 hours of operation x 0.084€/kWh x power per load
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Comparison