DE&S ABBEY WOOD INNOVATIVE SUB-METERING & ENERGY MAPPING: £400,000 savings and £750,000 funding

Defence Equipment and Support (DE&S) equips and supports the UK’s armed forces for current and future operations. Employing around 20,000 people, with a budget of some £14 billion, its headquarters is Abbey Wood in Bristol – the largest MOD site in the UK covering 98 acres with 130,000 m² of offices, restaurants, library, sports, training and conference facilities.

Challenge:  Split total building energy use into specific plant and equipment

DE&S recognised that there was great scope for energy and carbon savings across their largest site, however pinpointing exactly where savings could be made was considered a major challenge as existing sub-metering was limited to providing data for the total electricity use from each building, not for energy use for individual plant and equipment within each building. Furthermore DE&S calculated that an investment of £200,000 would be required for additional sub-metering to identify where the opportunities existed for savings.

Thinking: Deploy portable sub metering and present findings in an innovative Energy Map report format

As a long standing Energy Bureau partner with the MoD, C3 provided a project plan to show how portable heat and electricity meters could be deployed across the entire site to provide forensic and visual maps of energy usage for plant within each building – without the need to shut down; an extremely difficult challenge within the MOD environment.

Results:  Transparency of all energy consuming plant and equipment within building

The C3 plan resulted in an investment of just 10% of the original DE&S calculation. Quantifying and profiling the energy consumed by heating, ventilation, air-conditioning, lighting, PC’s, server UPS’s and caterings facilities gave the energy team a clear picture of building performance. Opportunities for savings were immediately visible and business cases developed for funding. As a result of C3’s work the DE&S have seen a 16% reduction in overall electricity use, saving over £400,000 (to date) with a further £750,000 of funding secured for future reduction projects.