Lighthouse city Nantes develops Smart lighting concept

The Western part of the demonstration district “Ile de Nantes” is a very busy and touristic entertainment area where many urban developments are implemented in the framework of mySMARTLife. It is a vibrant place ideal for deploying and testing new solutions, in particular in the field of smart lighting.
Currently, Nantes Metropole manages around 95,000 lighting points in the city for an electricity consumption of 45 Gwh per year, an annual electric bill of around 6 Million Euros and annual maintenance and exploitation costs of around 4 Million Euros.

Smart public lighting is an opportunity to respond to changing urban challenges and stakeholders needs as well as to optimise public lighting functioning, maintenance costs and energy efficiency. Therefore, Nantes Metropole aims at designing and implementing a new public lighting concept which will increase smart lighting innovation, optimise lighting costs and reduce energy consumption.

mySMARTLife partner ENGIE designed new smart lighting solutions to respond to the citizens’ and operators’ needs and will deploy them during the first semester of 2018. The demonstration area is divided into 5 zones with specific needs:

1. Due to new buildings, the street “Mail des chantiers” suffers from light and noise nuisance. An innovative concept is needed to solve this issue.

2. The side lane of “Contre allée Mail des chantiers” is currently poorly lightened and needs to be more attractive to encourage people to use it.

3. The lighting in the street “Cité des chantiers” has to be reduced and rearranged as to guide citizens to the esplanade.

4. “Quai des Antilles” is a highly frequented zone with a need for a very efficient lighting.

5. The street “Esplanade des riveurs” has a need for switching on/off the lights according to specific events.

To tackle these issues, different solutions will be implemented, such as the creation of a lighting path that will be deployed by ENGIE. To encourage people to use this path, new efficient LED lights will be installed with Gobo image projection in the area of “Contre Allée Mail des Chantiers”. Besides, ENGIE will install new LED lights with presence detection and dimming option in the area of “Mail des Chantiers” and “Cité des Chantiers” to encourage people to walk on the side lane of the parallel path in the evening. All light points will be controlled by a remote management system in real time. The operator will also monitor lights e. g. with an on/off switch functionality for specific events and a dimming option. Operating costs and maintenance plans will be optimised.

ENGIE will also install sensors (probably for measuring air quality and noise as well as cameras to count flows of people and traffic) to investigate interesting use cases. These sensors will communicate with the lighting network. Overall, the replacement of existing lamps by LEDs, dimming and individual lighting points remote management will enable to save 75% of energy and optimise maintenance. This new lighting system will be controlled and monitored through a flexible, open and interoperable multi-system and multi-application Content Management System (CMS). Public lighting energy data will also be integrated into the new Nantes Urban data platform.

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