Increasing the energy efficiency of the WEIMA WL 4 single-shaft shredder
In times of rising energy costs, energy efficiency is playing an increasingly important role in machine purchasing decisions. WEIMA has been pursuing the goal of continuously optimizing the energy consumption of its shredding solutions for years and has developed a new 11 kW drive option for the popular WL 4 shredder as part of this. This makes it possible to achieve comparable shredding results with reduced power and thus further improve the economic efficiency of the process.
Goal of the optimization
As part of a series of tests, the energy efficiency of the shredder with 11 kW drive power was examined in comparison to the 18.5 kW version. The aim of the study was to reduce energy costs and maximize the efficiency of the shredding process.
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Results
The results show a significant reduction in the starting current peaks: While the WL 4 with 18.5 kW had a maximum starting current peak of 59.8 A when shredding softwood, this was only 42.5 A for the 11 kW model – a reduction of approx. 30 %. This enables a lower fuse protection of the machine. The average power consumption (average power P_mx) of 6.18 kW was 21 % lower than that of the 18.5 kW model (7.79 kW).
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Savings
Extrapolated over a year, this can mean considerable savings. With a daily operating time of eight hours, the lower energy consumption adds up to around 258 kWh per month. At an average electricity price of €0.20/kWh, this means a saving of around €52 per month – or over €600 per year. For comparison: this saving is roughly equivalent to the annual consumption of 25 refrigerators (approx. 122 kWh/year consumption).
These results demonstrate the potential of the new drive option to reduce energy consumption while maintaining a comparably high shredding performance and underline WEIMA's commitment to efficient and sustainable solutions in shredding technology.
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