PRODUCT SHOWCASE
Four year ABB project saves Anglian Water £2.7 million
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nglian Water Services (AWS) has saved a total of over £2.7 million on its energy costs following an intensive four year ABB project to improve energy efficiency at over 100 of its sites. Over the lifetime of the project, AWS saved 33,765 MWh in energy, giving a cost saving of £2.73 million. This equates to 16,695 tonnes of CO2
.
The project began in 2006 when AWS approached ABB for help in improving the energy efficiency of its sites and reducing its carbon dioxide footprint. Using its network of ABB Drives Alliance members (Inverter Drive Systems, Gibbons Drive Systems and Sentridge Control), ABB was able to put together a plan of action to investigate AWS’ use of energy and determine how it could make savings. The ABB Drives Alliance implemented a plan based on its DrivesAdvantage programme, a comprehensive care and support package for users of ABB drives.
As well as service and repair, it also ensures that customers are gaining the best possible efficiency from their drives. The initial part of the plan involved training over 90 AWS personnel in programming low voltage AC drives and giving them an appreciation of how drives can be used to save energy. This enabled the AWS engineers to assist in finding energy saving opportunities. ABB Drives Alliance and AWS identified potential drives for optimisation using AWS’ asset databases and ABB sales information. The AWS engineers and ABB Drives Alliance then embarked on a programme to optimise the drives. An example application was an aeration ditch at the company’s Bassingbourne Sewage Treatment Works. To control the level of dissolved oxygen (DO) in the ditch, a 30 kW ABB standard drive was installed. A minimum speed of around 30 Hz was set on the drive to ensure adequate mixing is maintained within the ditch.
Linked to an existing DO meter, the drive gives significant energy savings. Power consumption is cut by over 48,000 kWh a year, representing an annual cost saving of over £4,000. Email:
energy@gb.abb.com www.abb.co.uk/energy
A new capacity for KerbDrain W
ith ACO Water Management’s addition of two
new product sizes to its award-winning combined kerb drainage system, ACO KerbDrain®,
engineers and designers will
have greater scope to develop sustainable drainage solutions that are optimised to their individual hydraulic environments. The new ACO KerbDrain HB405 half- battered and ACO KerbDrain SP380 splay units, which have the same flow capacity, sit between the mid-sized 305 and the largest 480 products, introducing a fourth volume option to the BSI Kitemarked range.
The KerbDrain HB405 units are 405mm high whilst the KerbDrain SP380 splay units have a profile that is 380mm in height. The two systems are fully compatible with transition units allowing seamless connectivity between profiles without any change in invert depth or
internal bore. All KerbDrain
units are
manufactured in one piece from Vienite™, ACO’s
high strength, sustainable
material that meets the environmental and sustainability targets for construction products. Vienite’s high durability characteristics make it four times stronger than traditional concrete. It also has a low rate of water absorption, is resistant to freeze-thaw attack and has excellent chemical resistance.
A new brochure explaining the full benefits and the product options available is now available via the ACO website,
www.aco.co.uk ACO’s Water Management Design Services team can also provide full technical support for any surface water management project. Both the Water Management Design Services and ACO Sales Support teams can be contacted on 01462 816666.
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Solar water heating for Tayside Divisional Police HQ
ndrews Water Heaters, part of Baxi Commercial Division, has supplied an award-winning gas-fired storage water heater and a solar water heating package which have been installed in a two-phase refurbishment project at Tayside Police’s Divisional Headquarters in Perth. Tayside Police are proactive in their requirement for energy efficiency and demanded a sustainable system to replace existing domestic water heating equipment, which comprised two large calorifiers served by the three space heating boilers – a system which was inefficient and costly to run, particularly in the summer months. The new system was designed by Elders Consulting. The DHW system serves all the hot water requirements for the building, including the staff toilets and showers, the canteen and kitchen and also the showers in the cell block.
The project was spread over two budget years, with the MAXXflo gas-fired storage water heater, sized to replace the two large calorifiers, installed in the first phase. Initially, one calorifier was removed from the plantroom, allowing the water heater to be installed in its place, then the second calorifier was disconnected and removed. In the second phase, a 900 litre solar pre-heat cylinder and other equipment in the solar package were installed adjacent to the MAXXflo water heater and this was connected to seven solar collector panels mounted on the roof of the cell block. These solar collectors, provide 90.8% transmission efficiency, 95% absorption efficiency and a low emission loss of only 5%.
The complete Solarflo package also includes solar controls, pump station, expansion vessels, first fill of heat transfer fluid and collector mounting accessories. Tel: 0845 070 1055
www.andrewswaterheaters.co.uk PUBLIC SECTOR SUSTAINABILITY • VOLUME 1 ISSUE 3 47
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