Jfe Steel Corporation

National Institute of Advanced Industrial Science and Technology

Jfe Container Co., Ltd

Toshio Takano

Hiroshi Okano

Nobuyuki Ishikawa

Kazuki Matsubara

Shusaku Takagi

Akihide Nagao

Kotaro Kadota

Mitsuo Kimura

Takuya Hasegawa

Tomoyuki Yokota

Nobuhiro Kuriyama

Hidekazu Tsuruta

Kenjiro Hamada

Nobuhiko Takeichi

Hiroyuki Takeshita

Hiroki Kuno

Norikazu Yamaguchi

To alleviate stress exerted on a thread portion of a high pressure gas container including a metallic container to prevent fatigue fracture, there is provided a high pressure gas container comprising a metallic container, wherein the metallic container includes: a metallic cylinder; a female thread portion on an inner peripheral surface of the metallic cylinder at at least one end; and a lid having, on an outer peripheral surface, a male thread portion configured to screw into the female thread portion, and a maximum value of residual compressive stress at a position of 0.4 mm in a depth direction from a plurality of thread bottoms of the female thread portion and the male thread portion is 100 MPa or more, less than or equal to tensile strength of a material of the metallic cylinder, and less than or equal to tensile strength of a material of the lid.

High pressure gas container and production method therefor

A high-pressure hydrogen container includes: a cylinder body; and a lid member that closes an end portion of the cylinder body. The cylinder body includes: a joining portion that fixes the lid member; a cylinder portion that forms an outer shell of a storage portion; and a sealing surface formed at an inner surface of the cylinder body. At least H<K is satisfied, where an area of the sealing surface which the sealing portion abuts is an abutting area, H is a thickness from the abutting area to an outer surface of the cylinder body, part of the cylinder body in which a stress greater than or equal to a predetermined stress σ is generated is a stress generation portion, and L is a distance between the abutting area and the stress generation portion.

High-pressure hydrogen container

A high-pressure hydrogen tank includes a metal circular cylinder configured to store high-pressure hydrogen therein, a cap part configured to cover each of opposite end portions of the metal circular cylinder, an outer cylinder surrounding an outer periphery of a circular-cylindrical portion of the metal circular cylinder, and a fastening part configured to fix the cap part to the outer cylinder.

High-pressure hydrogen tank

A hydrogen supply system is configured to supply hydrogen to a fuel-cell vehicle by using a receptacle for hydrogen transport, and includes: a filling unit provided at a hydrogen filling facility and configured to fill the receptacle with hydrogen; a management unit configured to calculate a transport timing at which the hydrogen-filled receptacle is transported to a business facility that operates the fuel-cell vehicle; a transport unit configured to transport the hydrogen-filled receptacle to the business facility in accordance with the transport timing; and a disposition unit configured to dispose the hydrogen-filled receptacle transported to the business facility at a place to which the fuel-cell vehicle is capable of accessing to have a refill of the hydrogen in the business facility.

Hydrogen supply system

A high-pressure hydrogen container is provided that has a simple configuration, requiring less labor for manufacture, achieving reduced manufacturing costs, and ensuring pressure resistance. The high-pressure hydrogen container includes a metal cylinder configured to store high-pressure hydrogen, a pair of lid parts configured to cover both end portions of the metal cylinder, and a plurality of fastening parts configured to fix the pair of lid parts in a state where the metal cylinder is clamped between the pair of lid parts.

A life estimation apparatus for a pressure accumulator estimates the life of the pressure accumulator based on an AE signal for the pressure accumulator. The life estimation apparatus includes: an AE sensor that is provided at the pressure accumulator and detects the AE signal; and an estimation unit that sets a point of time at which the AE sensor detects a damage AE signal that is generated from the pressure accumulator because of damage of a material during use of the pressure accumulator, as a minimum initial flaw generation time point that is a point of time at which a minimum initial flaw of the pressure accumulator that is detected by a non-destructive inspection method is generated in shipping of the pressure accumulator.

Life estimation apparatus for accumulator and life extension method for pressure accumulator

A method of manufacturing a pressure accumulator, using an AE signal for the pressure accumulator, includes: a first estimation step of estimating with an AE sensor provided at the pressure accumulator, a range of stress levels at each of which a damage AE signal that is generated from the pressure accumulator because of damage of material of the pressure accumulator is in a predetermined state; and a first design step of designing the pressure accumulator such that a minimum thickness of the pressure accumulator is determined based on the stress level range estimated in the first estimation step.

Method of manufacturing pressure accumulator

A hydrogen storage tank includes a liner layer to store hydrogen and a carbon fiber reinforced plastic layer disposed outside the liner layer. The liner layer is formed from a low-alloy steel, and the carbon fiber forming the carbon fiber reinforced plastic layer is a pitch based carbon fiber.

Hydrogen storage tank

A pressure containercomposed of a reinforcing layerand a liner layer, with a hydrogen charging pressure of 30 MPa or higher; and a hydrogen absorbing material and a carrier for holding said hydrogen absorbing material (hydrogen absorbing material portion) contained in the pressure containerare included, and a volume fraction X of the hydrogen absorbing material with &#x3b1;m&#x2267;100 kg/mwith respect to an internal volume of the pressure containeris 5(%)&#x2266;X&#x2266;20(%), where &#x3b1;m denotes a maximum hydrogen absorption amount per unit volume of the hydrogen absorbing material (kg/m); X=100 &#xb7;Vm/Vi (%); Vi is an internal volume of the pressure container (L); and Vm is a volume of the hydrogen absorbing material in the pressure container (L).

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Kanagawa, Japan

Toshio Takano