The John Lewis Partnership have set stringent energy and carbon targets for their business. The Partnership is working to reduce absolute operational CO2e emissions by 15 per cent by 2020/21 against the 2010/11 baseline.
As a business, the Partnership’s shops and branches are focussed on the overall customer experience. Energy management initiatives have always placed this, and partners’ engagement, as the key foundation of the Partnership’s sustainability strategy.
To achieve this, Axon has worked with Lateral Technology (Low Carbon Consultants) to implement an integrated programme to reduce energy and carbon consumption within thirty John Lewis branches.
Through accurate metering of the existing plant, potential energy saving measures were identified in thirty branches.
These measures were then implemented by optimising the existing Building Management Systems, configuring demand-based control strategies and adding the systems to the John Lewis internal IT network.
To support a sustainable energy management strategy, each store’s metered energy consumption was monitored as part of an evaluation process that allowed further improvements to be identified while isolating out-of-the-ordinary power consumption spikes.
This phase of the project offered a unique insight into energy performance and the information allowed the team to replicate the effects of modifying the Building Management System closely, and thus highlight areas of inefficiency.
The energy management solutions were evaluated further in the context of any potential customer impact.
A model of the optimum BeMS control point settings for each branch was created and loaded onto the Axon data servers. The intelligent system compares the optimum settings with current store settings on a daily basis.
Any deviations are highlighted and reviewed directly with the branch services staff to identify the reasons for change by the Axon Response Team. This ensures the energy and carbon savings are sustained for each branch and remain fixed to the model.
Throughout the implementation, the carbon and energy benefits were monitored continuously using Axon technology. This validates the modelled energy reductions and supports further adaptation to target additional potential energy saving measures.
The project was executed in collaboration with Lateral Technology and Solutions (M&E and Carbon Consultants for John Lewis). Once rolled out across the targeted John Lewis Branches, the service reduced the electrical consumption by 11% and enabled a 12.3% drop in carbon.