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Hydrogen train

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Debut of the Alstom Coradia iLint, a hydrogen-powered passenger train, at InnoTrans 2016
iLint of Regionalverkehre Start Deutschland on the way to its filling station at industrial park Höchst

In transportation, the original (2003) generic term "hydrail" includes hydrogen trains, zero-emission multiple units, or ZEMUs — generic terms describing rail vehicles, large or small, which use on-board hydrogen fuel as a source of energy to power the traction motors, or the auxiliaries, or both. Hydrail vehicles use the chemical energy of hydrogen for propulsion, either by burning hydrogen in a hydrogen internal combustion engine, or by reacting hydrogen with oxygen in a fuel cell to run electric motors, as the hydrogen fuel cell train. Widespread use of hydrogen for fueling rail transportation is a basic element of the proposed hydrogen economy. The term has been used by research scholars and technicians around the world.[1][2][3][4][5][6]

Hydrail vehicles are usually hybrid vehicles with renewable energy storage, such as batteries or super capacitors, for regenerative braking, improving efficiency and lowering the amount of hydrogen storage required. Potential hydrail applications include all types of rail transport: commuter rail; passenger rail; freight rail; light rail; rail rapid transit; mine railways; industrial railway systems; trams; and special rail rides at parks and museums.

The term hydrail is believed to date back to 22 August 2003, from an invited presentation at the US Department of Transportation's Volpe Transportations Systems Center in Cambridge, MA.[7] There, Stan Thompson, a former futurist and strategic planner at US telecoms company AT&T gave a presentation entitled the Mooresville Hydrail Initiative.[8] However, according to authors Stan Thompson and Jim Bowman, the term first appeared in print on 17 February 2004 in the International Journal of Hydrogen Energy as a search engine target word to enable scholars and technicians around the world working in the hydrogen rail area to more easily publish and locate all work produced within the discipline.[9]

Since 2005, annual International Hydrail Conferences have been held. Organised by Appalachian State University and the Mooresville South Iredell Chamber of Commerce in conjunction with universities and other entities, the Conferences have the aim of bringing together scientists, engineers, business leaders, industrial experts, and operators working or using the technology around the world in order to expedite deployment of the technology for environmental, climate, energy security and economic development reasons. Presenters at these conferences have included national and state/provincial agencies from the US, Austria, Canada, China, Denmark, the EU, Germany, France, Italy, Japan, Korea, Russia, Turkey, the United Kingdom and the United Nations (UNIDO-ICHET).[citation needed] In its early years, these conferences were largely dominated by academic fields; however, by 2013, an increasing number of businesses and industrial figures have reportedly been in attendance.[10]

During the 2010s, both fuel cells and hydrogen generation equipment have been taken up by several transport operators across various countries, such as China, Germany, Japan, Taiwan, the United Kingdom, and the United States. Many of the same technologies that can be applied to hydrail vehicles can be applied to other forms of transport as well, such as road vehicles.[10][8]

Technology

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See also: hydrogen, fuel cell, and Direct methanol fuel cell

Hydrogen is a common and easy to find element, given that each molecule of water has two atoms of hydrogen for every oxygen atom present.[10] Hydrogen can be separated from water via several means, including steam reforming (normally involving the use of fossil fuels) and electrolysis (which requires large amounts of electricity and is less commonly used). Once isolated, hydrogen can serve as a form of fuel.[10] It has been proposed that hydrogen for fueling hydrail vehicles can be produced in individual maintenance depots, requiring only a steady supply of electricity and water; it can then be pumped into pressurised tanks upon the vehicle.[10]

The development of lighter and more capable fuel cells has increased the viability of hydrogen-powered vehicles. According to Canadian company Hydrogenics, in 2001, its 25 kW fuel cell weighed 290 kg and had an efficiency ranging between 38 and 45 per cent; however, by 2017, they were producing more powerful and compact fuel cells weighing 72 kg and with an efficiency between 48 and 55 per cent, a roughly five-fold increase in power density.[10] According to Rail Engineer, the use of hydrogen propulsion on certain types of trains, such as freight locomotives or high-speed trains, is less attractive and more challenging than on lower-powered applications, such as shunting locomotives and multiple units.[10] The publication also observes that pressure to cut emissions within the railway industry is likely to play a role in stimulating demand for the uptake of hydrail.[10]

A key technology of a typical hydrogen propulsion system is the fuel cell. This device converts the chemical energy contained within the hydrogen in order to generate electricity, as well as water and heat.[10] As such, a fuel cell would operate in a manner that is essentially inverse to the electrolysis process used to create the fuel; consuming pure hydrogen to produce electricity rather than consuming electrical energy to produce hydrogen, albeit incurring some level of energy losses in the exchange.[10] Reportedly, the efficiency of converting electricity to hydrogen and back again is just beneath 30 per cent, roughly similar to contemporary diesel engines but less than conventional electric traction using overhead catenary wires. The electricity produced by the onboard fuel cell would be fed into a motor to propel the train.[10] Overhead wire electrification costs are around EUR 2m/km, so electrification is not a cost-efficient solution for routes with low traffic, and battery and hydrail solutions may be alternatives.[11]

Railway industrial publication Railway Engineer has theorised that the expanding prevalence of wind power has led to some countries having surpluses of electrical energy during nighttime hours, and that this trend could offer a means of low-cost and highly available energy with which hydrogen could be conveniently produced via electrolysis.[10] Thus, it is believed that the production of hydrogen using off-peak electricity available from countries' electrical grids will be one of the most economic practices available. As of January 2017, hydrogen produced via electrolysis commonly costs roughly the same as natural gas and costs almost double the price of diesel fuel; however, unlike either of these fossil-based fuels, hydrogen propulsion produces zero vehicle emissions.[10] A 2018 European Commission report states that if hydrogen is produced by steam methane reforming, hydrail emissions are 45% lower than diesel trains.[11]

According to Rail Engineer and Alstom, a 10MW wind farm is capable of comfortably producing 2.5 tonnes of hydrogen per day; enough to power a fleet of 14 iLint trains over a distance of 600 km per day.[10] Reportedly, as of January 2017, production of hydrogen worldwide has been expanding in quantity and availability, increasing its attractiveness as a fuel. The need to build up a capable distribution network for hydrogen, which in turn requires substantial investments to be made, is likely to play a role in restraining the growth of hydrail at least in the short term.[10]

It was observed by Railway Technology that the rail industry has been historically slow to adopt new technologies and relatively conservative in outlook; however, a successful large-scale deployment of this technology by an early adopter may be decisive in overcoming attitudes of reluctance and traditionalism.[8] Additionally, there could be significant benefits to transitioning from diesel to hydrail propulsion. According to the results of a study performed by a consortium of Hitachi Rail Europe, the University of Birmingham, and Fuel Cell Systems Ltd, hydrail vehicles in the form of re-powered diesel multiple units could be capable of generating significant energy consumption reductions; reportedly, their model indicated a saving of up to 52 per cent on the Norwich to Sheringham line over conventional traction.[10] An intermediate step using railroad-familiar technology is burning a mixture of diesel and hydrogen in conventional engines although this is not zero emission, the ultimate goal.[12]

Hydrolley

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A hydrolley is a term for a streetcar or tram (trolley) powered by hydrail technology. The term (for hydrogen trolley) was coined at the Fourth International Hydrail Conference, Valencia, Spain, in 2008, as a research-simplifying search engine target word. Onboard hydrogen-derived power eliminates the need for overhead trolley arms and track electrification, greatly reducing construction cost, reducing visual pollution and eliminating the maintenance expense of track electrification. The term 'hydrolley' is preferred to 'hydrail light rail' or other combinations which might connote external electrification.[citation needed]

Safety

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Main article: Hydrogen safety

Hydrogen is combustible in a wide range (4%—74%) of mixtures with air, and explosive in 18—59%.[13]

Projects and prototypes

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Operating trains by country

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Germany

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In September 2018, the world's first commercial hydrogen-powered passenger train entered service in Lower Saxony, Germany. The Alstom-developed train uses a hydrogen fuel cell which emits no carbon dioxide.[50] In August 2022, the first rail line entirely run by hydrogen-powered trains debuted in Bremervörde, Lower Saxony, where the route's 15 diesel trains are getting gradually replaced.[51]

Drawbacks

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In October 2022, the German state of Baden-Württemberg announced that it would not be considering further use of hydrogen trains, as a study it commissioned found them up to 80% more expensive than electric trains powered by batteries or overhead wires.[52]

See also

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References

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  1. ^ Graham-Rowe, D. (2008). "Do the locomotion". Nature. 454 (7208): 1036–7. doi:10.1038/4541036a. PMID 18756218.
  2. ^ Minkel, J. R. (2006). "A Smashing Bad Time for the United States". IEEE Spectrum. 43 (8): 12–13. doi:10.1109/MSPEC.2006.1665046. S2CID 31330565.
  3. ^ Jones, W. D. (2009). "Fuel cells could power a streetcar revival". IEEE Spectrum. 46 (9): 15–16. doi:10.1109/MSPEC.2009.5210050. S2CID 38714850.
  4. ^ Jones, W. D. (2006). "Hydrogen on Track". IEEE Spectrum. 43 (8): 10–13. doi:10.1109/MSPEC.2006.1665045. S2CID 20449207.
  5. ^ Delucchi, M. A.; Jacobson, M. Z. (2010). "Providing all global energy with wind, water, and solar power, Part II: Reliability, system and transmission costs, and policies". Energy Policy. 39 (3): 1170–1190. doi:10.1016/j.enpol.2010.11.045.
  6. ^ Marin, G. D.; Naterer, G. F.; Gabriel, K. (2010). "Rail transportation by hydrogen vs. Electrification – Case study for Ontario, Canada, II: Energy supply and distribution". International Journal of Hydrogen Energy. 35 (12): 6097–6107. Bibcode:2010IJHE...35.6097M. doi:10.1016/j.ijhydene.2010.03.095.
  7. ^ Shah, Narendra (29 March 2022). "Hydrogen-Powered Trains". Metro Rail News. Archived from the original on 1 April 2022. Retrieved 25 August 2022.
  8. ^ a b c d Grey, Eva. "German state thrusts hydrogen-powered hydrail into the spotlight." Archived 7 February 2021 at the Wayback Machine railway-technology.com, 21 June 2016.
  9. ^ Stan Thompson and Jim Bowman (2004) "The Mooresville Hydrail Initiative", International Journal of Hydrogen Energy 29(4): 438, in "News and Views" (a non-peer-reviewed section)
  10. ^ a b c d e f g h i j k l m n o p q r s t "Hydrail comes of age." Archived 10 January 2018 at the Wayback Machine railengineer.uk, 5 January 2018.
  11. ^ a b European Commission. Directorate General for Research Innovation (November 2018). Final Report of the High-Level Panel of the European Decarbonisation Pathways Initiative (PDF). European Commission. p. 57. doi:10.2777/636. ISBN 978-92-79-96827-3. Archived (PDF) from the original on 17 January 2021. Retrieved 20 January 2020. Hydrogen fuel cell trains are also more expensive than diesel ones (+30 %) because their energy costs are currently higher and they are less efficient than electric trains. However, their GHG emissions are 45 % lower than diesel, even if hydrogen is produced via steam methane reforming. These 58 emissions can decrease to almost negligible levels when using green and low-carbon hydrogen.
  12. ^ Stephens, Bill. "Wabtec sees hydrogen as fuel of the future". Trains. Vol. 84, no. February 2024. Kalmbach Media. pp. 8–11.
  13. ^ Lewis, Bernard; Guenther, von Elbe (1961). Combustion, Flames and Explosions of Gases (2nd ed.). New York: Academic Press, Inc. p. 535. ISBN 978-0124467507.
  14. ^ "Fuel-Cell-Powered Mine Locomotive." Archived 24 December 2014 at the Wayback Machine Sandia National Laboratories, 2004.
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  17. ^ "World's first hydrogen fuel train tested in Taiwan." Archived 25 January 2008 at the Wayback Machine People's Daily, 13 April 2007.
  18. ^ Adamson, Kerry-Ann "2007 Niche Transport Survey." July 2007. Archived 11 July 2011 at the Wayback Machine (PDF). Fuel Cell Today.
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  20. ^ "Hydrail: Preliminary Proposal". Archived 29 October 2014 at the Wayback Machine interstatetraveler.us.
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  22. ^ Adamrah, Mustaqim (8 January 2010). "RI could have a super high speed train as early as 2012". Jakarta Post. Archived from the original on 29 June 2010. Retrieved 26 March 2011.
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  26. ^ Hoffrichter, Andreas; Fisher, Peter; Tutcher, Jonathan; Hillmansen, Stuart; Roberts, Clive (2014). "Performance evaluation of the hydrogen-powered prototype locomotive 'Hydrogen Pioneer'". Journal of Power Sources. 250: 120–127. Bibcode:2014JPS...250..120H. doi:10.1016/j.jpowsour.2013.10.134. ISSN 0378-7753.
  27. ^ "First UK hydrogen train takes passengers for a ride." Archived 27 December 2017 at the Wayback Machine New Scientist, July 2012.
  28. ^ Peng, Fei; Chen, WeiRong; Liu, Zhixiang; Li, Qi; Dai, Chaohua (2014). "System integration of China's first proton exchange membrane fuel cell locomotive". International Journal of Hydrogen Energy. 39 (25): 13886–13893. Bibcode:2014IJHE...3913886P. doi:10.1016/j.ijhydene.2014.01.166. ISSN 0360-3199.
  29. ^ "China introduces first light-rail train with new-energy fuel cells." Archived 4 January 2011 at the Wayback Machine People's Daily, 29 November 2010.
  30. ^ "Amplats testing fuel cell-powered loco at Rustenburg mine." Archived 8 November 2014 at the Wayback Machine engineeringnews.co.za, 9 May 2012
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  33. ^ "Dubai-streetcar" Archived 2 April 2015 at the Wayback Machine applrguk.co.uk.
  34. ^ "Powered future starts in trams, not cars." Archived 25 November 2016 at the Wayback Machine Bloomberg, 25 March 2015.
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  39. ^ "JR East to trial Toyota-powered fuel cell multiple-unit". Railway Gazette. 7 June 2019. Archived from the original on 9 June 2019. Retrieved 10 June 2019.
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  42. ^ "La SNCF donne le coup d'envoi au TER hydrogène à la française". Les Echos (in French). 7 April 2021. Archived from the original on 28 April 2021. Retrieved 28 April 2021.
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  44. ^ Weinberg, Harrison (21 September 2022). "Stadler unveils first hydrogen train for U.S., announces order for up to 29 more". Trains.com. Keith Fender. Retrieved 21 September 2022.
  45. ^ "CVX, CAT, BNSF Hydrogen Locomotive Demo".
  46. ^ "Caterpillar, BNSF and Chevron Agree to Pursue Hydrogen Locomotive Demonstration".
  47. ^ https://www.csx.com/index.cfm/about-us/media/press-releases/cpkc-and-csx-announce-planned-collaboration-to-develop-additional-hydrogen-locomotives/ [bare URL]
  48. ^ "Hydrogen Feasibility Study". Valley Link Rail. Tri-Valley–San Joaquin Valley Regional Rail Authority. Retrieved 15 January 2023.
  49. ^ "Valley Link Advances Vision to be Nation's First Passenger Rail System to Operate on Self-Produced Green Hydrogen Fuel" (PDF). Valley Link Rail. Trii-Valley–San Joaquin Valley Regional Rail Authority. Retrieved 15 January 2024.
  50. ^ "Hydrogen fuel cell train to enter service". NHK World – Japan. 16 September 2018. Archived from the original on 18 September 2018. Retrieved 18 September 2018.
  51. ^ Buckley, Julia. "The world's first hydrogen-powered passenger trains are here". CNN. Retrieved 15 September 2022.
  52. ^ Collins, Leigh (20 October 2022). "'Will no longer be considered' - Hydrogen trains up to 80% more expensive than electric options, German state finds". Retrieved 4 July 2023.
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