Automobile manufacturers have been proceeding with conversion to 70 MPa storage pressure for fuel-cell vehicles, in order to extend their cruising range, and therefore, technology development enabling hydrogen dispensing to be made possible at 70 MPa is also desired for hydrogen refueling stations. With the objective of verifying the durability of the hydrogen refueling station as a total system and studying cost-reduction methods, in 2008 Toho Gas received a commissioned project from the New Energy and Industrial Technology Development Organization (hereafter, "NEDO"). We constructed a 70 MPa hydrogen refueling station in our Technical Research Institute in February 2010. The three main features of the 70 MPa hydrogen refueling station are as follows: 1) Configuration using the latest domestic technology, such as a dispenser and compressor that were developed under NEDO's "Fundamental Technology Development Project of Safe Hydrogen Utilization (2003-2007), etc." 2)The compressor has a compression capacity of 300 Normal m3/h, the highest level in Japan, enabling evaluation tests to be conducted in which commercialized hydrogen refueling stations to be widely established in and after 2015 are assumed. 3) Capability of performing direct dispensing from the compressor without passing through an accumulator, and differential-pressure refueling using accumulators. With this hydrogen refueling station, we have been tackling the following three major problems in technology development: 1) Durability assessment of the hydrogen refueling station component equipment 2) Development of direct dispensing system 3) Establishment of hydrogen cooling technology We started dispensing tests in March 2010 and undertook repetitive dispensing equivalent to one year in advance of the period of proliferation to demonstrate one-year maintenance-free for the compressor, accumulators, pre-cooler, dispenser, and valves. Moreover, we conducted dispensing tests to fuel-cell vehicles and high-flow rate tests for determining the equipment capacity to realize an instantaneous maximum flow rate of approximately 3,000 g/min, and also verified that the hydrogen temperature can be held to f20πC or lower. For the development of the direct dispensing method, we verified that direct dispensing can be safely performed as specified by the control procedure.
Demonstration study of a 70MPA hydorgen refueling station
WGC, World Gas Conference, 25 ; 1286-1300
2014
15 Seiten, Bilder, Tabellen
Aufsatz (Konferenz)
Englisch
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