scholarly journals Estimating changes in urban ozone concentrations due to life cycle emissions from hydrogen transportation systems

2007 ◽  
Vol 41 (39) ◽  
pp. 8874-8890 ◽  
Author(s):  
Guihua Wang ◽  
Joan M. Ogden ◽  
Daniel P.Y. Chang
Keyword(s):  
Life Cycle ◽  
Transportation Systems ◽  
Ozone Concentrations ◽  
Urban Ozone

Hydrogen as Fuel for Urban Transportation Environmental Footprint of Different Hydrogen Production Routes and the Influence on the Total Life Cycle of FC Powered Transportation Systems: An LCA Case Study within CUTE

2005 ◽  
Vol 895 ◽  
Author(s):  
Marc Binder ◽  
Michael Faltenbacher ◽  
Matthias Fischer
Keyword(s):  
Fuel Cells ◽  
Life Cycle ◽  
Fuel Cell ◽  
Hydrogen Production ◽  
Environmental Impacts ◽  
Transportation Systems ◽  
Hydrogen Fuel ◽  
Environmental Footprint ◽  
European Cities ◽  
Total Life

AbstractFuel cells have the potential to offer an alternative propulsion system to convential internal combustion engines used in transportation at the present time. As a result fuel cells may provide consumers a cleaner and more efficient technology. Fuel cells are powered with hydrogen fuel which can be produced from various energy sources, which include renewable sources of energy or conventional fossil fuel. Thus, the emerging hydrogen infrastructure needs to be addressed carefully.A consortium of industries, research institutes and several European cities launched the EU-project CUTE (Clean Urban Transport in Europe), whose aim is not only to develop and demonstrate 30 fuel cell busses and the accompanying infrastructure in 10 European cities, but also assess the environmental impacts. Within the project scope the potential of fuel cell powered transport systems for reducing environmental influences such as greenhouse effect, improving the quality of the atmosphere and conserving fossil resources is assessed. This first large scale test run of fuel cell transportation systems is the best possible information base to give real life numbers about environmental impacts of a fuel cell system including hydrogen used as fuel.Meanwhile the use of hydrogen fuel is mostly considered as environmental friendly. However a statement about the actual environmental impacts is only possible by regarding the entire Life Cycle of the hydrogen, which include its production and use. Within CUTE different routes of the hydrogen production have been assessed: hydrogen production via electrolysis and steam reforming, considering different boundary conditions, e.g. country specific energy production/ supply, different ways for electricity production (e.g. wind power, geothermal energy etc.) etc.This presentation will show the environmental footprint of these routes (Life Cycle Assessment results), which enable the comparison of the environmental impacts of the different hydrogen production routes and the transportation system considering the total life cycle (production of FC bus, operation and end of life) along with diesel and natural gas as “conventional” fuels for bus operation.

scholarly journals A Comparative Study of Two Passenger Transportation Systems between Two Bangladeshi Cities

1970 ◽  
Vol 2 (2) ◽  
pp. 1-10
Author(s):  
K Shahriar Iqbal ◽  
Samir K Shil
Keyword(s):  
Life Cycle ◽  
Water Transport ◽  
Customer Service ◽  
Ecological Impact ◽  
Freight Rate ◽  
Transportation Systems ◽  
Passenger Transportation ◽  
Water Transportation ◽  
Marine Engineering ◽  
Inland Water Transport

Using life cycle impact assessment, required freight rate and the customer service time, the ecological impact and the economic performance of bus and water transportation systems were evaluated and compared for the Dhaka - Narayanganj route in Bangladesh. Then the benefit of modal shifting of passengers from bus to water transport is shown. The results are shown as three different comparison indices. The water transportation showed clear superiority in environmental and economic aspects. Only the ‘service quality' went to the favor of bus.   Keywords: Inland water transport, transportation planning, environmental pollution, life cycle assessment,  sustainable development, Kyoto Protocol.    doi:10.3329/jname.v2i2.928 Journal of Naval Architecture and Marine Engineering 2(2005) 1-10

scholarly journals On the classification of motive power failures

Dependability ◽  
2021 ◽  
Vol 21 (4) ◽  
pp. 12-19
Author(s):  
Yu. V. Babkov ◽  
E. E. Belova ◽  
M. I. Potapov
Keyword(s):  
Life Cycle ◽  
Markov Chains ◽  
Technical Condition ◽  
Transportation Systems ◽  
Probabilistic Methods ◽  
Railway Transportation ◽  
Structural Problems ◽  
Failure Classification ◽  
Technical Systems

The Aim of the article is to develop a motive power failure classification to enable substantiated definition of dependability requirements for motive power as a part of a railway transportation system, as well as for organizing systematic measures to ensure a required level of its dependability over the life cycle. Methods. The terminology of interstate dependability-related standards was analysed and the two classifications used by OJSC “RZD” for estimating the dependability of technical systems and motive power were compared. The dependability of railway transportation systems is studied using structural and logical and logical and probabilistic methods of dependability analysis, while railway lines are examined using the graph theory and the Markov chains. Results. An analysis of the existing failure classifications identified shortcomings that prevent the use of such classifications for studying the structural dependability of such railway transportation systems as motive power. A classification was developed that combines two failure classifications (“category-based” for the transportation process and technical systems and “type-based” for the motive power), but this time with new definitions. The proposed classification of the types of failures involves stricter definitions of the conditions and assumptions required for evaluating the dependability and technical condition of an item, which ensures correlation between the characteristics of motive power and its dependability throughout the life cycle in the context of the above tasks. The two classifications could be used simultaneously while researching structural problems of dependability using logical and probabilistic methods and Markov chains. The developed classification is included in the provisions of the draft interstate standard “Dependability of motive power. Procedure for the definition, calculation methods and supervision of dependability indicators throughout the life cycle” that is being prepared by JSC “VNIKTI” in accordance with the OJSC “RZD” research and development plan. Conclusion. The article’s findings will be useful to experts involved in the evaluation of motive power dependability.

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