Hydrogen Fuel Cell Bus Technology State of the ... - NEXTHYLIGHTS

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Hydrogen Fuel Cell Bus Technology State of the Art Review The hydrogen refuelling station project in Leyton, London Location: Leyton / London / UK Timeline: In service by late 2010 Project Summary: One medium/small refuelling station (dispensing capacity of 320kgH2/day) based on trucked-in liquid hydrogen for the refuelling of up to 8 hybrid fuel cell buses. Project Manager: Transport for London (TfL) (http://www.tfl.gov.uk/) Project Partners: Air Products, City of London, FCH – JTI, First Group Refuelling Station Specifications: Refuelling station capital cost Capacity 320kgH2/day (upgradable) Hydrogen purchase price Confidential Hydrogen source Approx. € 3 million 27 (including all logistics costs and staff training) Steam methane reforming from Air Product‟s production plant in Rotterdam (the Netherland, some 470km away from London). The hydrogen is liquefied and trucked to the refuelling station through a special tanker – Hydra Refuelling concept Cascade refuelling – no precooling On-site storage design The storage system is directly provided by the Hydra tanker itself. The Hydra tanker stores up to 3.5 tonnes of hydrogen in liquid form and dispense it in gaseous phase at pressures up to 440bar through an integrated vaporiser and compressor. The tanker will be parked in the refuelling area and connected to two dispensers. Once empty, it will be simply replaced by a full tanker. Refuelling time Expected refuelling time: 10 minutes / bus (30kg of onboard hydrogen capacity) for 8 buses in sequence within a refuelling windows of 4 hours Location and footprint The refuelling site is located within an existing bus depot 27 Source: www.thehydrogenjournal.com 100
Hydrogen Fuel Cell Bus Technology State of the Art Review Safety distances Footprint: < 400 m 2 Standard safety requirements for liquid H2 (EIGA requirements). A safety distance of 20m from occupied buildings is maintained. Distance from bus depot The refuelling facility is within the bus depot Discussion: The refuelling station consists of the Hydra tanker itself, high pressure hydrogen storage tanks and two dispenser units. The daily capacity can be easily upgraded as the Hydra tanker designed to store up to 3.5 tonnes of hydrogen; this is enough fuel for over 100 buses per day. If more hydrogen were required, additional-site liquid hydrogen could also be added. Additional expansion would require additional on-site equipment, notably additional high pressure hydrogen storage. Figure 41, below, provides an overview of the refuelling site (in the background) and the maintenance depot (foreground). Hydra tanker Refuelling area Figure 41 Computer graphic of the refuelling site in London (in the background), and the alongside bus maintenance depot. Courtesy of Transport for London (TfL) The hydrogen fuel will be produced in the Netherlands by steam methane reforming and trucked to the refuelling area by road and ferry. It is worth noting, however, that the contract with the hydrogen supplier includes provision to source hydrogen from more 101
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