Previous situation
A potable water pumping system in a paper industry operated at a constant load, consuming 116 kWe. Analyzing the different users, it was found that only a few required large volumes of water when the paper was being cut on the machine. These paper cuts occurred infrequently; therefore, the pump supplied a greater flow than was actually necessary for the various users most of the time.
The solution
ENEF coordinated and verified the installation of a variable frequency drive (VFD) on the pump, which varies its rotation according to the operation of the paper machine. When there is no interruption, the VFD reduces the frequency to the minimum. On the other hand, when an interruption occurs, the frequency increases to the nominal value, providing the necessary flow rate.
Next, we demonstrate the savings obtained when there is no paper cutting:
Results
A 51% reduction in energy consumption was achieved. This percentage is typical when implementing frequency inverters
15 months
Return on investment
40.000 USD
Annual financial savings
