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P3 7-8/2020 en
Toscotec
Consumption Reduction at Wepa Giershagen
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Wepa Group is one of the largest tissue manufacturers in Europe, with 13 sites, 21 paper machines, a production of approx. 780,000 t/year, and a positive annual growth trend. Since 2002, Toscotec and Wepa’s cooperation has been particularly strong at Wepa Marsberg-Giershagen, where Toscotec supplied a new tissue line on a turnkey basis, completely rebuilt PM 5 in two different steps and installed new hoods on other two existing machines, with the result that all tissue machines at the mill are now equipped with TT Hoods.
In order to evaluate the return on the investment, it is always interesting to compare the efficiency of the equipment – consumption and performance - before and after the rebuild. This comparison is particularly clear if looking at PM 4 and PM 7, where the modification involved only the hoods and the air system. After the installation of TT Hood on PM 4, the mill achieved a 12.5% reduction in gas consumption and 50mpm increase in machine speed. The results on PM 7 were similar, with a 13.3% reduction in gas consumption and 50mpm increase in speed.
In general terms, for a tissue machine that produces 30,000 t/y with a thermal consumption of 1.3MWh/t, 10% of drying energy savings equals a cost reduction of approximately 4 €/t, i.e. 120,000 €/y. Additional savings coming from electrical load reduction and machine speed increase must also be considered.
