aubele - a self-sufficient led street light powered by fuel cells

AUBELE A self-sufficient LED street light powered by fuel cells

- HarzOptics GmbH – an affiliated institute of Harz University -

Solid State and Organic Lighting (SOLED) | 11.-15.11.2012

HarzOptics GmbH | Jens-Uwe Just | 11.-15.11.2012 | Solid State and Organic Lighting (SOLED)

Products

• OPTOTEACH teaching system

• 3dB POF coupler / splitter

• Fiber lenses / fiber taper

• LED lighting

Services

• Optical metrology

• Research and development

• Consulting and project planning

Education and training

• Distance learning in optics

• Trainee education in optics

HarzOptics – Research & Development


Agenda

- Motivation / Goals

- System set-up - Electrical part - Optical part

- Simulation

- Results


Motivation

Two main reasons for project AUBELE 1. Energy savings

• local authorities need to save costs and achieve climate goals • LED lighting is the most promising technology • Energy savings of up to 80% are possible

(depending on the previously used light bulbs)

2. Autonomous operation • In rural areas, bus stops are often located outside of villages

and are relatively far away from the nearest cable route


Motivation

Costs for cable / digging (example):

Distance of a bus stop to the next cable route: 800 m Price for cable installation (including excavation work): 30 € / m Costs in € for connection to the power grid: 24.000 €


Bus stop scenery

• 15 Lux: within 2 meters around the lamp

• 3 Lux: 10 meters on both sides in the direction of the street

• 1 Lux: 20 meters on both sides in the direction of the street

• 3 Lux: at the opposite side of the street

Goals / Lighting situation


• Compliance with the requirements of the lighting situation

• Minimizing the energy consumption of the lamp with LEDs

• Minimizing the hydrogen consumption

• Developing of a system based on a small fuel cell, a battery and an optional, complementary photovoltaic system

• Design of an intelligent control system

• Ground recessed installation (resistant to vandalism)

Goals / Technical specification


Block diagram of the AUBELE system

System setup


• Hydrogen fuel cell: water cooled Schunk FC 42 stack

• Designed as a hybrid system:

– Lamp is powered by battery

– Fuel cell works as a battery charging system

• Frost-proof

Optional: photovoltaic system

Electrical part / Hydrogen fuel cell


• Self-developed circuit

• Microcontroller PIC

• Voltage-dependent PWM control

• Communication with fuel cell module

Optional:

• GSM-based radio, remote control and maintenance

• Radio clock

• Dimmable

• …

Electrical part / LED driver


• Luxeon Rebel LEDs

• 8 LEDs, 2 of them equipped with lenses

Optical part / LED lamp


LED lamp


• hier Bilder von Dialux

Dialux pictures I


• To fulfill the legal lighting requirements, the power consumption of the LED lamp could be minimized to 15 W The AUBELE LED lamp is optimized in regard to energy consumption, CO2 emission and light pollution reduction

• Hydrogen consumption: 60 l / year (1 bottle)

• Improved efficiency of management of the fuel cell system

• Self-monitoring of fuel cell, battery and LED lighting

• Optional: Integration of communications – GSM-based radio, remote control and maintenance

Ready for sale – offered on demand

Results


• EAB Elektro-Anlagenbau GmbH Rügen Responsible for the housing and mounting system

• argus electronic GmbH Responsible for the hybrid energy supply system

• Harz University of Applied Sciences / HarzOptics GmbH Responsible for the development of the LED lighting system

This project was funded by the

German Federal Ministry of Economics

Project partners


Thank you for your attention

… any questions??

aubele - a self-sufficient led street light powered by fuel cells

Technology