Motors offer 96% efficiency
A
Siemens Flender product story
Edited by the Engineeringtalk editorial team
Apr 25, 2007
Significant energy savings were made at a large Midlands brewery, thanks to the installation of Flender Motox helical bevel geared motors.
A large proportion of gearboxes in the UK food and drink industry are helical worm units, with average efficiencies of around 75%.
Retro-installing Flender helical bevel geared motors, with their typical efficiencies of 96%, provides efficiency improvements of up to 28%, according to Siemens Automation and Drives.
Significant energy savings were made at a large Midlands brewery, thanks to the installation of Flender Motox helical bevel geared motors.
The brewery's conveyor drive featured nonFlender helical worm drives, each using 1.5kW at 82rev/min, with an overall drive efficiency of just 59%.
Actual monitored power consumption was 1.1kW.
When a Flender helical bevel drive with an energy efficient (eff1) motor was fitted, providing 1.5kW at 82rev/min, the drive efficiency improved to 81% and the actual monitored power consumption dropped to 0.48kW.
New helical bevel units were fitted following this result, with motors achieving 0.55kW consumption.
The overall savings were calculated assuming an energy charge of 6p per kWh, and equated to GBP 562 per annum per unit; GBP 657 per annum per unit assuming energy charges of 7p per kWh.
For a plant with more than one geared motor on site, this saving can be multiplied accordingly.
At the brewery project 42 high-efficiency Flender Motox units were installed on the packaging conveyor line within a period of 12 weeks.
Calculating typical energy charges at 6p per kWh, this equated to almost GBP 24,000 in savings per annum, representing a payback period of under two years.
Benefits of the Flender units included standardisation, through utilisation of standard IEC frame eff1 motor; reduced cost, as an IEC motor is considerably less expensive than a dedicated motor; reduced downtime through immediate availability and the motor being a 'dry fit' to the gearbox; increased productivity, as the motor can be replaced with a gearbox in situ; and cost reduction.
High-efficiency helical bevel gear units allow lower long-term energy costs with easier maintenance through the dry fit motor adapter, and eff1 rated motors bring further savings in energy costs.
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