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High efficiency motors for bio-ethanol plant

High efficiency motors for bio-ethanol plant
The first W22 high efficiency motors supplied by WEG in Europe - three 200kW machines - are (appropriately) engaged in a 'green' process for the production of sustainable bio-fuels. The 4-pole 315L frame W22 motors have been supplied to BioWanze in Belgium where they are used with inverters in a mill that processes wheat and beet syrup to produce bio-ethanol. With this innovative system BioWanze intends eventually to provide half the amount of the bio-fuel consumed in Belgium.

BioWanze is the first project to produce 'new generation' bio-ethanol in Europe. Begun in 2009, the plant at Wanze in Belgium is capable of producing 758m3 of ethanol per day. Bio-ethanol is produced from agricultural feedstock - in this case wheat and beet syrup. The process is highly efficient, the centerpiece being a biomass boiler with enhanced thermal efficiency, with each element of the process optimised to ensure an overall minimal impact on the environment.

The requirement for max-imised efficiency across the process has resulted in the use of WEG's new W22 high efficiency motors at the BioWanze facility. The motors are installed on the cooling tower of the mill at the plant. They were supplied by WEG's Benelux branch in Belgium to Hamon Thermal Europe, a cooling tower manufacturer, and subcontractors to De Smet Engineering and Contractors, who were partners of BioWanze in the mill construction project. The W22 line is a new generation of high efficiency motors. The company says the W22 excels in energy performance due to its ability to reduce motor losses by between 10% and 40% when compared to traditional AC induction motors. Moreover, the W22 units complement their excellent energy efficiency with low levels of noise and vibration in operation.

The W22 motors offer the key advantage that they already comply with and (in some cases) exceed all the requirements of IEC60034-30, the new harmonised IE (International Efficiency) grading standard for electric motors, which will be standard worldwide from June 2011. The design that enables them to achieve conformity includes an aerodynamic frame, which increases the air flow and reduces temperature. In addition, the terminal box of the motor is positioned to improve air flow over the motor. In practical terms this means less hot-spots and, consequently, improved reliability.

The reliability and operating life of W22 motors is also extended by WEG's innovative WSeal system. This has a W-ring with a metal cover, which protects the rubber sealing from harmful ultra-violet rays. The same design also ensures that the interior of the motor benefits from much higher levels of protection against the input of external agents, such as water and dust, which may cause damage to rolling bearings within the motor.
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