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20 ABB


ANDRITZ


Industrial drives offer huge energy savings


Pulp Paper & Logistics


Board AB in Sweden has provided immediate energy consumpti on savings of 80 per cent. “The driving force behind this


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installati on was energy savings, meaning cash and environment to be saved,” says Magnus Johanson, energy engineer at Fiskeby Board AB, which installed the fi rst of several ABB ACS880 series industrial drives at its Norrköping mill in Sweden. “It wasn’t the failure of the old drive that led us to make this change but more a feeling that we could save money and perform bett er with new technology.” Fiskeby Board AB is a major user of energy, and therefore


November/December 2016


he installati on of ABB’s latest industrial drive in the pumping operati ons at Fiskeby


highly conscious for the need to conserve energy. ABB’s new industrial drive, the wall-mounted ACS880-01, was installed on a diluti on water pump resulti ng in an immediate 80 per cent reducti on in the energy needed for that operati on. More of these drives have since been installed at Fiskeby. The results have been excellent, with the new drive saving 80 per cent or more of the energy that was previously wasted by the pump motor. “Each year,” says Johanson, “this amounts to around 120 MWh, costi ng 6-7,000 euros. It’s not peanuts and gives a pay-back ti me of less than two years.” The ACS880 drive is installed on a diluti on water pump on the fi lter unit in the Fiskeby board


Energy savings of 80 per cent were achieved by Fiskeby Board following the installati on of industrial drives from ABB. PPL reports


mill, which is Scandinavia’s only white-lined chipboard producer. Using 100 per cent recycled fi bre Fiskeby makes what is considered to be Europe’s strongest recycled paperboard. The mill is also the only one in Scandinavia that can recycle composite liquid packaging board (LPB) such as in milk and juice cartons.


Only running at the speed required Prior to the installati on of the new ABB drive, fl ow control was achieved by running the pump at full speed against a valve that was nearly closed for 80 per cent


of the ti me. “Obviously this wasn’t very


effi cient and led to wasted energy,” states Johanson. “It was like we were driving a car and pushing both the accelerator and the brake at the same ti me. It was really an outdated control system and is very typical of the applicati ons where we can fi nd large potenti al energy savings.” With the new ACS880 drive, the pump now runs at variable speed depending on the level of the tank it is feeding. This means it is running slower for much of the ti me, hence the energy savings. The ACS880 series drives


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