4.2 Energy savings
Efficient use of energy resources is one of the cornerstones of DIA’s sustainable growth model as this helps reduce its environmental impact and cut costs. In 2015, the company reduced electricity consumption per square metre across all its markets by 6.06%, compared to a year-or-year reduction of 2.41% in 2014.
In Spain, with the aim of continuing to hone its energy efficiency, the traditional lighting in place in more than 360 El Árbol stores and another 30 cash & carry stores was switched to LED technology. This entailed the installation of over 96,000 LED tubes in these stores, delivering the attendant reduction in consumption.
At these same establishments, the open freezers were replaced with more energy-efficient refrigeration cabinets, each of which cuts consumption by 15kWh/day. Specifically, 3,500 new cabinets were installed.
These two projects entailed investment of almost €8 million.
The installation of LED tubes and more energy-efficient cabinets in El Árbol and Max Descuento stores entailed investment of €8 million
The group’s new format–La Plaza de DIA–features the energy efficiency measures that characterise the rest of its new stores. For example, the refrigerators have glass doors and are equipped with LED lighting.
In Portugal, taking advantage of the refurbishment of the Minipreço Market and Minipreço Family stores, the company invested a little over €2.5 million in changing the refrigeration cabinets with a view to making these stores more energy efficient.
Also in Portugal, the capacitor banks were checked; as a result, this equipment was repaired at 53 stores and new equipment was installed in a further 50. Adjustments were made for summer temperatures at 74 stores and a refrigeration system audit was performed at 60 stores, a process set to continue in 2016. Against this backdrop, refrigeration cabinets were upgraded to more energy-efficient models at 41 stores.
Projects were also carried out at the Torres Novas, Valongo and Alverca warehouses, specifically introducing LED lighting and variable speed drive compressors. Warehouse consumption was cut by 457 MWh (-4%) in 2015 and is expected to come down further in 2016 with the execution of LED switches at another two warehouses.
The company also undertook major energy efficiency overhauls in its stores and warehouses in China, investing close to €200,000 to this end. August marked the culmination of the project of switching conventional light bulbs for LED technology in 200 stores. This drive to introduce greater energy efficiency across the Chinese store base was accompanied by other reforms such as the replacement of fridge and freezer cabinets in more than 30 stores, driving savings per establishment of 2,044 kWh–3,650 kWh per annum.
In the offices within the Chinese warehouses, 288 bulbs were upgraded to LED technology, driving savings of 1,452 kWh/month. The implementation of new efficiency measures at the logistics centre was rounded out with the fine-tuning of the compressor control and repair system, delivering year-end savings of 9.3%.
In a bid to make its stores ever more energy efficient, DIA tests the most cutting-edge efficiency systems at its so-called Sustainable Stores and, once these systems prove effective in terms of both efficiency and return on investment criteria, the stores are retrofitted accordingly.
Energy efficiency in warehouses
DIA Portugal is developing a smart automation project with a view to making its cooling equipment more energy efficient. This project began in 2015 and is set to continue throughout 2016.
Use of clean energy
The electricity consumed by 70% of DIA’s store network comes exclusively from renewable sources, as certified by its power supplier, E.On.
DIA’s headquarters in Madrid (Spain) provides good example of the company’s commitment to using clean and renewable sources of power as these offices are located in a building that has obtained LEED Gold Core & Shell certification.