Barcelona‘s beach is being lit up with new-look street lights. The six innovative lamp posts are each fitted with two solar panels, a wind turbine and a battery. As a result, the environmentally-friendly lights generate enough energy to run for ten hours overnight. The new product has been designed by the company Eolgreen with the collaboration of a research team from the Universitat Politecnica de Catalunya (UPC).
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“Compared to a traditional street lighting system, these six street lights that we have set up emit two tonnes less CO2 per year than sodium vapour or mercury vapour bulbs we see in conventional systems,” says Pedro Montes leads research at developers Eolgreen. The company also says its lights are 20 percent cheaper to run than conventional lights because they use LED technology and are independent from the electricity grid. While solar-powered LED street lighting is used elsewhere, Eolgreen‘s system is unique because its graphene turbines turn with even a gentle breeze.
Ramon Bargallo, researcher at the UPC, who helped design the independently-powered lights adds: “It was a big challenge as generators often need high speed winds to turn, between 1500 rpm and 3000 rpm. But we needed a generator able to work with only four or five rpm. Also generators are normally more efficient the higher the wind speed and less efficient at low wind speeds, so we had to design it in the opposite way.” Barcelona’s planners aim to roll out the new lighting system across the whole city. It’s part of their drive to achieve energy self-sufficiency in the next 40 years. Eolgreen intends to ramp up production to 700 streetlights by the end of the year. While the sustainable energy developers continue to improve efficiency, they hope their system will soon be brightening streets all over Spain.