W22 Motors Aid Production Of Sustainable Bio-Fuels

WEG has supplied a number of W22 high-efficiency motors to Biowanze in Belgium for the production of sustainable bio-fuels. The four-pole 315L frame W22 motors are used with inverters in a mill that processes wheat and beet syrup to produce bio-ethanol. Eventually, Biowanze intends to provide half the amount of the bio-fuel consumed in Belgium. 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 said to be highly efficient - the centrepiece being a biomass boiler with enhanced thermal efficiency - with each element of the process optimised to ensure overall minimal impact on the environment. The requirement for maximised 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 subcontractor to De Smet Engineering and Contractors, a partner of Biowanze in the mill construction project.

The W22 line is a new generation of high-efficiency motors; it is claimed to excel in energy performance owing to its ability to reduce motor losses by between 10 per cent and 40 per cent when compared with traditional AC induction motors. The W22 units provide low levels of noise and vibration in operation. The motors already comply with and, in some cases, exceed all the requirements of IEC60034-30, the new harmonised International Efficiency (IE) 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.

This means less hot spots and, consequently, improved reliability. The operating life of W22 motors is also extended by WEG's WSeal system. This has a W-ring with a metal cover, which protects the rubber sealing from harmful ultraviolet rays. The same design also ensures that the interior of the motor benefits from 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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