energy efficiency in city buses - siemens türkiye · 2010-06-02 · maximum flexibility with the...

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Siemens Answers: Sustainable Future

Energy Efficiency in City Buses

June 01, 2010

Siemens Answers: Sustainable Future01.06.2010 Manfred Schmidt

Definition of City Bus

Start and stop frequentlyRun at low average speedsOperate for long hours;from early morning until late at nightLifetime of 15 years or up to 60,000 operating hours

If the energy lost during braking could be saved and used for the next start,the overall fuel consumption would go down:

Hybrid Drive with electrical storage is the solution!


Where do the Savings come from?

Further reasons for savings:

Start-stop function for combustion engine

Optimized auxiliary conceptbased on electric motors

Operate combustion engine in optimum point, reduce transients

Mainly from recuperation of braking energy


Reason for Hybrid Traction in City Buses

Increased global and local pressure on emissions reduction including CO2 Increased requirements for noise reductionIncrease in attractiveness and comfortAchieve significant fuel savings to reduce operating costs

Based on the driving cycle, the energy storage technology, the electric components and an advanced energy management, a reduction of up to

40% in fuel and CO2 emissions

is possible.


Future Development of City BusesCity bus of the future has an electric drive - best case as “Zero Emission Vehicle”

Development roadmap depends on innovation in energy storage devices and fuel cells – taking into account the infrastructure.

Optimizations in engine and gearbox

City bus withseries hybrid(transient solution)

City bus withbattery ( & range extender)

Dead end

Very little further emissionreduction possible

Conventional city bus with combustionengine

Time line today 2015 ?

City bus with parallel hybrid

City bus with electric charging

Zero emission vehicles

Variants according to available type of energy

Evolution

City bus withbattery + fuel cellRevolution (System Change)

Reduced emission andfuel consumption


Flexibility3 with Siemens ELFA

Flexibility in bus sizeThe Siemens ELFA System is modular and can be adapted to the performance requirements of the bus, i.e length, weight, climbing ability etc.

Flexibility in energy mixFollowing the technical progress, Siemens ELFA System can be efficiently adapted to new energy sources, e.g. from diesel to pure battery or fuel cell. This can be done at minimum effort for installation and additional costs.

Flexibility in mechanical integrationThe ELFA serial hybrid allows most freedom in arrangement of thecomponents since traction and power module are connected by electrical wires


Three examples of current reference projects

TEMSA Ultra-Cap Hybrid BusStandard low-floor 12 m city bus with ultra-capacitor storage technologyPrototype successfully tested

Buses from Wrightbus for Las VegasArticulated diesel hybrid buses 18 m with new PEMmotor technology, 400 kW max. powerAcceleration 0 – 50 km/h in 10 sec with 29 tonsfull weight

New Bus for London from Wrightbus for London20 diesel hybrid buses delivered to TfL with up to40% fuel saving in test resultsAnother 600 DD buses now ordered by TfLas “New Bus For London”


Vision for City Bus Transport System of theFuture …

… how could it looklike?


Bus Transport System of the Future … a possible Vision

zero emission

zoneeBRT corridor

eBR

Tco

rrido

rreduced emission zone

reduced emission zone



Battery Buses

UCap Hybrid Buses

Battery/UCapHybrid Buses

Battery Hybrid Busestravel in the reduced emission zone and through the zero emission zone


What is eBRT?

Loading at stations

Storage of energy on board

100% electric propulsion

no local CO2 emission

silence & comfort

high energetic efficiency

optimized ride quality

Loadinginterface


Electric traction allows for New Options!


Why Siemens?

Siemens ELFA puts the focus on serial hybrid drives

This type of hybrid drive allows maximum recuperation of braking energy and gives maximum flexibility in control of the combustion engine (engine stop function).This results in a reduction of fuel consumption up to 40% and the corresponding emission reduction.Further, the serial hybrid drive is the platform for the “revolution” to a zero emission vehicle, e.g. fuel cell, pure battery bus or electric charging bus.

The key components are made by Siemens

This ensures the highest manufacturing and quality standards together with optimized cost structure.

Maximum flexibility with the Siemens ELFA system

With the use of few standardized components the modular structure of the system allows fulfilment of the OEM's individual performance requirements for various types and sizes of buses. In this way, high production volume is achieveable, which save costs and increase quality.


Siemens References

MAN, 12m Ucap Hybrid Bus Mercedes Citaro Hybrid Bus Van Hool Hybrid Bus TEMSA Hybrid Bus

Mitsubishi FUSO Hybrid Bus Faun, Hybrid Garbage TruckNew Flyer Gasoline Hybrid Fuel Cell Hybrid (Vancouver)

Agrale Hybrid Bus Marine Application Ashok Leyland Hybrid Bus TATA Hybrid Bus


Manfred SchmidtDirector Marketing & Sales Hybrid DrivesI DT LD T HD

Vogelweiherstrasse 1- 1590441 Nuremberg

Mobile: +49 173 282 3436E-mail: manfred.j.schmidt@ siemens.com

Thank you for your attention!

energy efficiency in city buses - siemens türkiye · 2010-06-02 · maximum flexibility with the...

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