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Edward Lowton
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Saving energy and space
26 November 2013
In September 2012 Atlas Copco Compressors invited long-term customer, precision engineering company Di-Spark Group, to trial the operation of its energy and space saving GA15VSD+ rotary screw compressor, which is powered by the company’s own in-house designed interior permanent magnet (iPM) motor.

The compressor’s performance and the energy savings gained to date, plus the unit’s minimal footprint, persuaded Di-Spark to install the compressor as a permanent addition to the air supply plant at its two sites in Horndean, UK.
Atlas Copco’s GA Variable Speed Drive (VSD) technology automatically adjusts the motor speed to match the compressed air supply to the air demand. When combined with the innovative design of the iPM motor, which exceeds IE4 efficiency requirements, the result is an average energy saving of 50% and an average reduction of 37% in the lifecycle cost of a conventional fixed-speed compressor.
A new, more efficient fan motor achieves yet another saving on specific energy requirement of up to 7% of the compressor power. Furthermore, due to the silent motor and fully-enclosed drive train, the compressor runs as quietly as 62dB(A).
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