To Rubber & Plastics 0115-0192 CONSIDER IT SOLVED TM Network Power • Process Management • Climate Technologies • Storage Solutions • Industrial Automation • Motor Technologies • Appliance Solutions • Professional Tools One of Europe’s leading tyre manufacturing plants – Michelin in Dundee - has installed a new cooling tower for process water – and cut its annual energy consumption by a massive 1,500 MWh. Key to the savings is the close speed control of fans and pumps, using AC drives from Control Techniques, matching supply with demand and reducing the cooling plant power consumption, when idling, to about that of a domestic kettle! This remarkable project was driven from inception by Project Manager Mike Barklie, who identified that efficiency improvements in recent years had reduced demand for cooling water meaning that the existing plant was over-sized. “I measured actual cooling requirements and realised that there were further potential savings to be made by putting in variable-speed drives to match the supply of cooling water to demand,” he says. “It was a major investment, but we have achieved a tremendously successful result that has a return on investment of less than three years!” Control Techniques drives are the drives of choice throughout Michelin plants worldwide with several hundred drives installed on production lines, stirrers, extruders, pumps and fans throughout the Dundee factory alone, which has an output capacity of some 24,000 car tyres a day for the worldwide market. Considerable investment at the plant is boosting production output and creating new jobs. This latest project reflects Michelin’s commitment to the environment and its drive to save energy wherever possible. The new SPX Marley high-efficiency cooling tower has two 30 kW cooling fans for the dual 300m3 cells and there are six large pumps – three 22 kW pumps for the hot water to the tower and three 90 kW, 4.4 bar pumps to return the chilled KEY BENEFITS • MASSIVE ENERGY SAVINGS • CLOSE SPEED CONTROL • MATCHING SUPPLY WITH DEMAND MICHELIN DUNDEE DRAMATICALLY CUTS ENERGY USAGE
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To Rubber & Plastics
0115
-019
2
CONSIDER IT SOLVEDTM
Network Power • Process Management • Climate Technologies • Storage Solutions • Industrial Automation • Motor Technologies • Appliance Solutions • Professional Tools
One of Europe’s leading tyre manufacturing plants
– Michelin in Dundee - has installed a new cooling
tower for process water – and cut its annual energy
consumption by a massive 1,500 MWh. Key to the
savings is the close speed control of fans and pumps,
using AC drives from Control Techniques, matching
supply with demand and reducing the cooling plant
power consumption, when idling, to about that of a
domestic kettle!
This remarkable project was driven from inception
by Project Manager Mike Barklie, who identified that
efficiency improvements in recent years had reduced
demand for cooling water meaning that the existing plant
was over-sized. “I measured actual cooling requirements
and realised that there were further potential savings to
be made by putting in variable-speed drives to match the
supply of cooling water to demand,” he says. “It was a
major investment, but we have achieved a tremendously
successful result that has a return on investment of less
than three years!”
Control Techniques drives are the drives of choice
throughout Michelin plants worldwide with several
hundred drives installed on production lines, stirrers,
extruders, pumps and fans throughout the Dundee factory
alone, which has an output capacity of some 24,000
car tyres a day for the worldwide market. Considerable
investment at the plant is boosting production output and
creating new jobs. This latest project reflects Michelin’s
commitment to the environment and its drive to save
energy wherever possible.
The new SPX Marley high-efficiency cooling tower has two
30 kW cooling fans for the dual 300m3 cells and there are six
large pumps – three 22 kW pumps for the hot water to the
tower and three 90 kW, 4.4 bar pumps to return the chilled
KEY BENEFITS
• MASSIVE ENERGY SAVINGS• CLOSE SPEED CONTROL• MATCHING SUPPLY WITH DEMAND
MICHELIN DUNDEE DRAMATICALLY CUTS ENERGY USAGE
CONSIDER IT SOLVEDTM
Network Power • Process Management • Climate Technologies • Storage Solutions • Industrial Automation • Motor Technologies • Appliance Solutions • Professional Tools
For further information please visitwww.controltechniques.com
water back to the factory. All fans and pumps are fitted
with Control Techniques Commander SK AC drives, each of
which receives a speed reference from the controlling PLC
system that monitors pressure, temperature (of cooled
water), levels in the cooling water sumps etc and which
also produces trend predictions.
The fans in the cooling tower are designated as main and
standby, the drive for the standby only starting when the
demand on the main fan drive exceeds 60%. On minimum
speed, which is one fan at 40% of full speed, the power
demand is just 2.5 kW – described by Mike Barklie as ‘the
same as an electric kettle’ – some 87.5 kW less than the old
cooling tower. The average consumption per hour has now
dropped from 242 kW to just 66 kW over all the pumps and
fans associated with the water cooling system – a saving of
186 kW per hour – or over 4 MWh per day!
The Commander SK range of general purpose drives –
0.25 to 132 kW – has been designed as a simple, compact,
cost-effective AC motor speed controller that delivers
performance with simplicity and ease of use. With all the
parameters needed for 90% of applications printed on the
front of the drive, Commander SK ensures installation and
commissioning are straight forward.
In addition to supplying cooling water for production
requirements, the new cooling plant at Michelin’s Dundee
plant also supplies chilled water to the air handling units to
cool the factory in the summer months. In the winter, the
same system uses steam to provide space heating.
Michelin’s UK head office and commercial headquarters is
in Stoke-on-Trent with tyre factories in Ballymena (bus and
truck tyres) and Dundee (car tyres) as well as a truck tyre
retreading factory in Stoke-on-Trent. Its Dundee factory
exports its car tyres all over the world and continues to