City Speak XI - Is transport the solution or the enemy? Pascal Dupont of Alstom
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TRANSPORT 24/04/2010 Evolution of technologies on modern tramways Pascal DUPOND
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Development and transport are closely related, but how do we connect the dots and guarantee a livable city for future generations? Lifting the moratorium in Mid-levels, reducing the threshold for redevelopment and the constant pressure to increase density are all choking the older parts of Hong Kong with more traffic and roadside air pollution. How do we deal with the increased traffic on new roads to the Mainland? How many more roads are we planning to build on our waterfront? Is there too much public transport clogging up our roads? Is replacing pedestrian crossings with subways and footbridges a good thing? What plans are there for environmentally friendly transport and aesthetically more pleasing transport infrastructure in Hong Kong? Where are the hopes for making our city more pedestrian-friendly? Can new engine technology solve our problems? Could electronic road pricing help? Will the new rail lines be enough? Do we have a sustainable (transport) plan for our city? Planners, engineers, academics and officials will discuss whether transport is our solution or our enemy. Designing Hong Kong is a not-for-profit organisation focused on sustainable urban planning. See: www.designinghongkong.com
Transcript of City Speak XI - Is transport the solution or the enemy? Pascal Dupont of Alstom
TRANSPORT
24/04/2010
Evolution of technologies on modern tramways
Pascal DUPOND
Why a green approach to rail saves operators and cities money?
Reducing the environmental impact of the trains from production to recycling
98% of easily recyclable materials
Less energy consumption: implemented in all our product range
Commitment on sustainable mobility, thanks to new technologies
• Reduction of energy consumption
−Use of composite materials
− Improvement of the traction systems’ efficiency
−Reduction of the weight
−energy consumption down by 10%
− in terms of Kwh/passenger, a modern tramway is four times more economical than a bus, and ten times more than a car
Commitment on sustainable mobility, thanks to new technologies
Less noise and vibration emissions
Energy saving solutions
Less particles emissions
Development of new technologies: focus on power supply
Traditional Power collection is via an Overhead Contact Wire (OCW), which necessitates a dedicated unsightly infrastructure.
Removal ofUrban Clutter
Cities with historic center and buildings wanted an alternative to the OCW to eliminate the “clutter” created by the tram infrastructure.
Why alternative power supply solutions?
• Preserve urban environment• To facilitate access in narrow streets, facade renovation, …
Development of new technologies: focus on power supply
Two main types of Alternate Solutions were developed :
Full performance solutions (Alternate Power Supply or APS) :
Rely on a wayside infrastructure to provide power to the vehicle Need an interface between the vehicle and the wayside
Limited performances solutions (On Board Energy Storage Systems or OBESS) that mix :
A standard or alternate full performance infrastructure and One or more dedicated on-board energy storage system(s)
Development of new technologies: focus on power supply
Impact on the landscape, thanks to new technologies
1 - Ground level power supply via a 3rd rail embedded in the tracks (APS)
Segmented street-level power rail Conductive segments Switched off-on-
off as tram progresses Safety rule: Conductive segments
energized under tram only. Safety rule consequence: All segments
outside tram at 0 Vcc
Development of new technologies: APS
Development of new technologies: APS in Bordeaux
Facilitates road crossings and emergency service access
Facilitates maintenance of city equipment
Offers a total safety to pedestrians and road users
Impact on the landscape, thanks to new technologies
2 – On Board Energy Systems Storage (OBESS)
• Several On-board Energy Storage Systems (OBESS) have been developed :Batteries, in operation since 2007 in Nice FranceSuper Capacitor, in operation on line T3 in Paris since August 2009
• OBESS performances are not similar :Batteries
•Can store large quantities of energy•Have low power to mass ratio, •Life is affected by charge/discharge rate and temperature•Are Expensive•Are better suited to provide quasi continuous loads over several minutes
Super Capacitor•Have high power to mass ratio•Have a small effective storage capacity•Life is affected by maximum cell voltage and depth of discharge•Are well suited to handle large power burst over short time period•Still require the overhead system or the APS to handle long inter station, grades and intensive use of the air conditioning.
Development of new technologies: OBESS
Development of new technologies: OBESS in Nice & Rotterdam
Modern tramways: new design opportunities
A backdrop for creativity
Image of the city associated to the image of the Tramway
Adoption and assimilation by inhabitants (nicknames of Tramway systems…)
Interior designs to meet new higher expectations from passengers : comfort, information…
Modern tramway: new design opportunities
Modern tramway: new design opportunities
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Modern tramway: new design opportunities
Modern tramway: is it adequate for Hong Kong?
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