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

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Hydrogen Fuel Cell Bus Technology State of the Art Review On-site storage design The site will be equipped with two ionic compressors, one being used for redundancy or for matching peak demand. The storage system is composed of two hydrogen middle pressure storage tanks at 50bar (of 50m 3 each) and 120 bottles (nominal volume of 50 litres) at 830bar, in order to perform both 350bar and 700bar refuelling. The system is designed to store up to 720kg of hydrogen. Refuelling time Expected refuelling time: 60 - 80gH2/second at 350bar (peak: 120 gH2/second for buses) and 5 kgH2/3 minutes at 700bar (SAE). Location and footprint Location: rural mixed area – close to a water channel, bridge, roads and office buildings. Footprint: 700 m 2 Safety distances The location of the refuelling station allows to maintain a safety distance from hazards in compliance with the German regulations Distance from bus depot ~ 15km (indicative distance between the bus depot in Hamburg Hummelsbüttel and HafenCity) Discussion: The refuelling station will be the second hydrogen station in the city of Hamburg. The refuelling station has been designed for bus and car demonstrations and includes two separate dispenser units for performing 350bar and 700bar refuelling simultaneously. The station will be suitable for 24/7 unmanned refuelling operations. The station has little room for extra on-site storage, being placed alongside a river and two bridges. The facility, however, has been designed to accommodate an extra electrolyser if required. 104
Hydrogen Fuel Cell Bus Technology State of the Art Review Figure 43 Computer graphic of the refuelling station in HafenCity, Hamburg. Source: Clean Energy Partnership website The refuelling station is a demonstration prototype within the city of Hamburg, which aims to demonstrate the concept and the viability of green on-site hydrogen production. This justifies the high capital cost of the project. It is worth noting that the concept design will be not promoted in other demonstrations. Figure 44, below, summarises the economics of the refuelling station in terms of the hydrogen price at the pump, considering a fixed dispensing capacity (750kgH2/day), a discount period of ten years, the capita cost of this (demonstration) site, a discount rate of 3.5%, a yearly maintenance fee equivalent to the 3% of the capital cost of the refuelling station and: 50% of the hydrogen being produced from electrolysis – assuming three different prices for the sourced electricity (€0.05/kWh, €0.2/kWh, €0.3/kWh) 50% of the hydrogen being trucked-in at, for example, €4/kgH2 105
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Hydrogen Fuel Cell Bus Technology State of the ... - NEXTHYLIGHTS

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