MOTORS AND DRIVES 67
DRIVE SAVES ON ENERGY COSTS E
nergy costs for the operation of a 90kW rotary compressor
installed at Albion Automotive, one of the UK’s automotive tier 1 suppliers, have fallen by £14 000 per year after compressor experts, Glaston Compressor Services, fitted a Vacon NXS variable speed drive controller. The drive, which replaces the existing single-speed starter, works in conjunction with a compressor management system developed by Glaston. This is arranged to ensure that the output of the compressor always matches the instantaneous demand for compressed air. Glaston has been responsible for supplying and maintaining energy efficient HPC compressors at the Albion Automotive site since 1996 and, on the basis of its experience elsewhere, the company knew that fitting a Vacon variable speed drive would yield substantial energy savings. In order to quantify the savings that would be made possible by fitting the Vacon
compressor installation. In addition to the anticipated energy savings resulting from continuously matching the operating speed of the compressor to the instantaneous load, it also proved possible to make further savings by reducing the nominal operating pressure of the installation. The minimum acceptable delivery pressure for the production plant at Albion Automotive is 6bar.
drive, and to make a compelling business case for Albion Automotive to invest in the upgrade, a free detailed energy survey was carried out at the site. The findings initially indicated that the new drive would provide savings of £7 000 per year, against a total cost for the project of around £12 000. With the prospect of payback in less than
two years, Albion Automotive decided to proceed. The installation went smoothly, with minimal disruption to the operation of the
In the past, the installation has been operated at a nominal pressure of 7.0 to 7.5bar to ensure that, even under conditions of maximum peak demand, the delivery pressure never fell below the required minimum. As a result of this reduction, and a number of other minor energy saving adaptations made by Glaston, the total cost savings increased from the forecast £7000 to £14 000 per year. n
For more information, visit
www.vacon.com
High performance REALISED
Rolaram Linear Actuators
Where high precision actuation is required or as a replacement to hydraulic or pneumatic units the Rolaram electric linear actuators provide a powerful yet flexible linear motion solution.
Designed to meet the increasing requirements of medium to high duty applications they use a ball screw for medium duty/precision actuators and a Spiracon™ planetary roller screw for high duty/precision actuators. So that you can realise your designs the Rolarams can be extensively customised and our team of highly experienced engineers are on hand to provide assistance.
Specifications and 3D CAD files available at
www.powerjacks.com/rolaram
• Dynamic Load Ratings up to 400kN • Linear Speeds up to 7000 mm/min • Roller Screw & Ball Screw Drives • 3-Phase AC, 1-Phase AC and DC Types • Special Custom Designs Available
Rolaram Linear Actuators Designed and manufactured in Great Britain Circle 67 or ✔ at
www.engineerlive.com/ede
Tel: +44 (0)1346 513131
www.powerjacks.com sales@powerjacks.com
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