7AB.
AB. Task ７ＡＢ

Development of H
Hydrogenydrogen Refueling Station

7AB.
AB. 1 Targets of Research and Development
In “the hydrogen use international clean energy system technology (WE-NET) phase IIprogram”, a solid polymer electrolyte water electrolysis type (in Takamatsu city) and a natural
gas reforming type (in Osaka city) of hydrogen refueling stations (on-site system) weredeveloped since fiscal 1999. In both cases, hydrogen was produced inside the station. For
accelerating the introduction of hydrogen fuel cell vehicle in wide ranges, it is also necessary todevelop a hydrogen refueling station using hydrogen obtained from the by-product gas in thechemical engineering process, of which a considerable amount of supply is expectable already atthe moment. The object of this research and development project is to develop a hydrogen
refueling station, into which hydrogen is transported from the outside the station (off-sitesystem).
In fiscal 2001, we completed the design of the entire system for the hydrogen refuelingstation. The specification and design of the component apparatuses were also accomplished. We
started to manufacture some apparatuses. The investigation on a layout of the station site andinstallation of utility equipment were made. Further, we developed a dispenser and studied thetechnology for filling control of hydrogen.
7AB.
AB. 2

Results of Research and Development
Development Results in Fiscal 2001
2001

7AB.2.1
7AB.2.1 Production bases of salt electrolysis plants and their annual hydrogen production
The salt electrolysis plants are source of hydrogen for off-site system hydrogen refuelingstations. There are 35 plants in 27 companies dispersed all over the Japan. The number of salt
electrolysis plants in jurisdictional areas of local regional bureaus of economy, trade andindustry is shown in Table 7AB.2..1-1
The annual hydrogen production in fiscal 2001 was about 1.2 billion Nm3, the usages ofwhich were ca 50 % for chemical industry, ca 40 % for fuel and ca 10% for the others. The
transitions of usage of electrolysis hydrogen and trend statistics are shown in Table 7AB.2..1-2.
7AB.2.2
AB.2.2Fundamental specifications for offoff-site system hydrogen refueling station

The fundamental specifications for the hydrogen refueling station using hydrogen trailers as
the hydrogen source were determined. The determined specifications are as follows:(1) Generala. Filling capacity: Supposing 5 passenger-cars to be filled successively (35Nm3/car)b. Filling pressure: 25 MPaG and 35 MPaG-59-Table 7AB.2.1
AB.2.1.2.1-1

areass of
Number of salt electrolysis plants in jurisdictional area

local regional bureaus of economy, trade and industry
Bureau of economy, trade and industry

Number of Plants

Hokkaido

1

Tohoku

2

Kanto

10

Chubu

3

Kinki

3

Chugoku

6

Shikoku

3

KyushuDepartment of economy, trade and industry,
Okinawa general bureau

61
As of March 31. 2001

Table 7AB.2.1
AB.2.1.2.1-2

Transition of usage of electrolysis hydrogen and trend statistics
19972001

2006

H2 generation (Nm3/year)

1.1x1091.2x1091.2x109

Chemical industry

45 %

50 %

54 %

Fuel

47 %

42 %

38 %

Discharged

5%

5%

4%

Others3%3%2%c. Hydrogen supply purit: hydrogen≧ 99.99％: Dew point≦ -60 ℃

: Oxygen≦ 2 ppm: Nitrogen≦ 50 ppm: Carbon monoxide≦ 1 ppm: Carbon dioxide≦ 1 ppm: Hydrocarbon≦ 1 ppm(2) Major Equipmenta. Hydrogen supply source
・Hydrogen trailer: 2,600 m3 type (load capacity : ca 2,030 Nm3)

・Pressure: 19.6 MPaG (max)・Volume capacity: 660L x 20 cylinders-60-b. Hydrogen compressor unit
・Type: Diaphragm type・Capacity: 100Nm3/h (when the inlet pressure is 10 MPaG,)

・Suction pressure: 10 to 19.6 MPaG

・Delivery pressure: 40 MPaG

c. Gas storage unit
・Capacity: 3,120 L (240L x 13 cylinders)・Filling pressure: 40MPaG

d. Hydrogen dispenser unit
・Possible H2 filling pressure : 25 MPaG and 35 MPaG
・Filling nozzle: compatible with WEH (Germany) product(3) Safety measurea. For vehicles: Overload prevention function

b. For station: Hydrogen gas leakage detector and alarm device, fire detector,
electrostatic

eliminator,

fireprevention

andextinguishequipment, earthquake detector, emergency shut-down device,
vehicle collision prevention device, various interlock functionsetc.
(4) Hydrogen filling for vehicles
Hydrogen is filled to vehicles in 2 stages, from hydrogen trailers and from the gas storage.
7AB.2.3

Location and layout planning

The station was located in an area of the main factory of Tsurumi Soda Co., Ltd. in Tsurumi
Ward, Yokohama City, Kanagawa Prefecture, Japan. As the result of investigation of layout, thehydrogen refueling station has a total area of 470 m2 including buildings and the frontage facing
the city road of 14.6 m.
7AB.
AB.3 Future Subject in Research and Development
In fiscal 2002, the remaining component apparatuses of the hydrogen refueling station yet
manufactured in previous fiscal year will be manufactured and installed on the site. The
operation of the hydrogen refueling station will be started and the verification of the total
system will be done.
The items to be performed and the research and development subjects in the next year are
as follows:-61-(1) Manufacture of the component apparatuses and construction of hydrogen refueling station
The component apparatuses for the hydrogen refueling stations, except the dispenser unit
manufactured in the previous year, will be manufactured and installed on the site The test
operation and tuning will be done.
(2) Construction of the security equipment for hydrogen refueling station
The security system for operation of the hydrogen refueling station will be studied andinstalled.
(3) Test operation and verification of the total systema. Test operation
The operation data in environment of practical use will be obtained by filling hydrogen
into fuel cell vehicles and test tank containers.
b. Verification of total system
The total system constructed in the previous year will be adjusted suitably using theobtained data. The safety measures will also be verified.

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