energy efficiency in streetlighting & transport infrastructure

Street lighting & traffic infrastructure

www.transportlearning.net

ENERGY EFFICIENCY IN STREETLIGHTING

& TRANSPORT INFRASTRUCTURE

Picture courtesy of www.wurli.com



CONTENTS

• ENERGY EFFICIENCY

• Street lighting

• Traffic signals

• Christmas lighting

• General outdoor lighting

• Parking meters

• PROJECT DEVELOPMENT



LIGHT POLLUTION

Los Angeles

1908 1988

2002

picture courtesy Optimon



LIGHT POLLUTION

• Not really dark during the night

• insects attracted by typical illuminants

• www.darksky.org



BASICS

Beam[lm]

Luminositiy[lx = lm/m²]

Luminous intensitiy[cd]

Brightness[cd/m²]



6.000 Lux 2.500 Lux10.000 Lux

100.000 Lux

300 Lux



STREETLIGHTING

Measures

• Operating hours

• Power

• Light source

• Fixture

• Control system

Erasmus-bridge, Rotterdam,picture courtesy FGL, www.licht.de



Total cost

0

5000

10000

15000

20000

25000

30000

35000

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25

Jahre

Gesamtkosten Beleuchtungsanlage (25 Jahre)

GesamteWartungs- undInstandhaltungs-Kosten

GesamteEnergiekosten

GesamteErrichtungs-Kosten (ohneVerkabelung)

Total cost of a typical installation, 25 years

Investment 15%

after installation 85% maintenance

energy

investment



Light sources

• Light bulb

• Flourescent tube

• Sodium high pressure

• Sodium low pressure

• Mercury high pressure

• Metal halide

picture courtesy Optimon



Luminaire, fixture

• Material of body

• reflector technology

• Sealing technology

• lamp simple to change

pictures courtesy Optimon



digital control system

• Individual lamp control

• Online failure dedection of all components

• 3 main elements

• Lamp module

• CPU in switchboard

• PC-software

• Data transfer via GSM

picture courtesy www.tekkto.com



Example- Graz

• electricity costs 1,1 Mio Euro

• 4200 operating hours

• reduction of 10 minutes a day

-> -1,5% energy costs

• replacement of 720 luminaires

-> - 530.000 kWh per year or 58% picture courtesy www.energie-graz.at



TRAFFIC SIGNALS

• incandescent lamp 75W

• mass replacement 2x/year

• LED 10W

• replacement every two years

• reduction of electricity costs -50%

• reduction of maintenance costs - 30% Picture courtesy www.royersignal.de



Example- Stockholm

• 530 signal control points

• investment 6 Mio Euro

• electricity savings

-> 471.000 Euro/ year

• maintenance savings

-> 243.000 Euro/ yearpicture courtesy www.fet.uni-hannover.de



GENERAL OUTDOOR LIGHTING

• Promenades

• Buildings

• Sights

• Bicycle paths

• Sports fields

Picture courtesy FGL www.licht.de



Example- Solar lighting

• no grid interconnection necessary

• ideally suited for solitary applications

• always enough daylight to charge batteries

• Total cost 5.600 Euro

• Immediate saving 3.900 Euro (distance to

grid 150m)

Picture courtesy www.ecolights.at



CHRISTMAS LIGHTING

• LED lights offer significant energy savings

• investment costs are high

• life cycle costs to be calculated individually

• affects the expected traditional appearence

-> a matter of taste

Picture courtesy www.energie-graz.at



Example- Graz

• maintenance 130.000 Euro/ year

• energy consumption 93.000 kWh

• 400 operating hours

• reducing 2 hours/ day -> -3.000 Euro

• public christmas tree with LEDs -> -80% or 2.200 kWh Picture courtesy www.energie-graz.at



PARKING METERS

• Solar powered meters

• no grid interconnection necessary

• panels can be in total shadow

• operates with a 12 V battery

• typical consumption (100 tickets a day)

-> 2 kWh/ year

Picture courtesy www.gesig.at



Example- Erlangen

• 70 solar powered parking meters

• connected to center via GSM

• savings result from eliminating the costs for grid interconnection

Picture courtesy www.versorgungsbetriebe.de



PROJECT DEVELOPMENT

• Barriers

• Specific features

• Implementation

• Financing



Barriers

• Complex matter

• Little information

• Vast range of products

• Single measures without integral concept

• Many regulation, legal requirements

• Restricted funding possibilities



Implementation

• check of energy bills and maintenance costs

• survey of existing equipment

• Financial model

• Presentation of analysis to municipality

• Development of an integral long term concept

• Project planning and tendering

• Monitoring of savings

• Documentation



Financing

• dependent on monetary situation of the municipality

• different possibilities

• Cash settlement

• Leasing

• Contracting

• main argument is indebtedness of municipalities/

Maastricht-criteria



Leasing

• No initial investment

• Quick cash by means of „sale and lease back“

• No contribution to Maastricht- limit

• Agreements are expensive

• Suited for bigger investments

• No outsourcing of maintenance, risk,…

• No guaranteed savings



Third party financing

• No or little investment necessary

• Measures and installations are paid for by savings

• No contribution to Maastricht- limit

• Guaranteed savings

• Outsourcing of design, implementation, maintenance, risk

• suitable for projects with highly energy efficient measures



Thank you for your attention!

Picture courtesy www.energie-graz.at

energy efficiency in streetlighting & transport infrastructure

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