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Haden Building Management nominated for a world Green Business Award

28 December 2007

Haden Building Management has been nominated in the category for “Best use of technology to support environmental excellence” for a World Business Green Business Award, for its work with Stoke Schools PFI

The entry demonstrated Haden’s proactive approach to energy management through an active partnership between Haden Building Management Ltd (Haden), Transform Stoke Schools Ltd (TSSL), Stoke City Council (SSC) and school users within the Stoke Schools Private Finance Initiative (PFI). Following completion of a major refurbishment programme of over 100 schools in 2003, baseline consumption was established and Haden were targeted with a 5% reduction in energy consumption from this date.
Following analysis of the baseline consumption data, it was recognised by Haden management team that consumption was excessive for the size of the estate and a team was established to investigate the energy issue.

The initial focus was on reducing gas usage by improving the operation of the Trend Building Management System (BMS) which had been installed in the majority of schools during the refurbishment programme.
A Monitoring and Targeting (M&T) IT system was introduced to record utility consumption and cost. This identified and ranked poor performance, enabling the team to concentrate on specific schools with the maximum potential for saving. The system also ensured that data was regularly analysed and that improvement and change could be tracked.

Implementation of this strategy and involvement of all school users in saving energy resulted in the gas consumption for the year 2006 reducing by approximately 10,734,976 kWh (equivalent to 550 tonnes Carbon) from the 2003 base level. This represents a saving of 18.2% and amounts to an annual saving of £270,000 at today’s costs.

However, the energy team was acutely aware of the affect that changes in annual weather pattern affected consumption and the data was weather corrected using degree day analysis within the M&T system. This analysis takes into account external weather conditions and adjusts heating consumption data accordingly. Calculated savings were subsequently reduced to 8,318,108 kWh, (equivalent to 430 tonnes Carbon) and a saving of 14.1% following weather correction. This not only exceeds the 5% targeted reduction, but also the Kyoto reduction target of 12.5% by 2012 relative to 1990 levels.

The initial strategy was to improve communication between the computer located in the office and the site controller located at each of the schools; these problems were resolved by replacement or repair of the defective equipment. Once this communication was established, rationalisation of heating times, in conjunction with the school management, ensured that the schools were only heated when occupied. Further modification of the BMS strategy ensured that individual areas were only heated to the required temperatures.

The project has involved a whole school approach to saving energy as part of an ongoing partnership between Haden, TSSL, SCC and schools users. The Haden team has provided training and support for site staff in the implementation of energy conservation measures. Pupils are encouraged to participate in the provision of meter readings and consumption reports are provided by the team back to the school in order to encourage and motivate both pupils and staff.

This project is by no means complete and attention has now moved on to encompass changes in the software that drives the BMS to further enhance performance and to lighting improvements to reduce the overall consumption.

The winners of all categories were announded on Thursday 29th of November in London.

www.balfourbeatty.com


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