WO2014174845A1 - 蓄圧器 - Google Patents
蓄圧器 Download PDFInfo
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- WO2014174845A1 WO2014174845A1 PCT/JP2014/002300 JP2014002300W WO2014174845A1 WO 2014174845 A1 WO2014174845 A1 WO 2014174845A1 JP 2014002300 W JP2014002300 W JP 2014002300W WO 2014174845 A1 WO2014174845 A1 WO 2014174845A1
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- WIPO (PCT)
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- carbon fiber
- liner layer
- pressure accumulator
- hydrogen
- steel
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C1/00—Pressure vessels, e.g. gas cylinder, gas tank, replaceable cartridge
- F17C1/02—Pressure vessels, e.g. gas cylinder, gas tank, replaceable cartridge involving reinforcing arrangements
- F17C1/04—Protecting sheathings
- F17C1/06—Protecting sheathings built-up from wound-on bands or filamentary material, e.g. wires
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C1/00—Pressure vessels, e.g. gas cylinder, gas tank, replaceable cartridge
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2201/00—Vessel construction, in particular geometry, arrangement or size
- F17C2201/05—Size
- F17C2201/058—Size portable (<30 l)
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2203/00—Vessel construction, in particular walls or details thereof
- F17C2203/06—Materials for walls or layers thereof; Properties or structures of walls or their materials
- F17C2203/0602—Wall structures; Special features thereof
- F17C2203/0604—Liners
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2203/00—Vessel construction, in particular walls or details thereof
- F17C2203/06—Materials for walls or layers thereof; Properties or structures of walls or their materials
- F17C2203/0602—Wall structures; Special features thereof
- F17C2203/0612—Wall structures
- F17C2203/0614—Single wall
- F17C2203/0621—Single wall with three layers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2203/00—Vessel construction, in particular walls or details thereof
- F17C2203/06—Materials for walls or layers thereof; Properties or structures of walls or their materials
- F17C2203/0634—Materials for walls or layers thereof
- F17C2203/0636—Metals
- F17C2203/0639—Steels
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2203/00—Vessel construction, in particular walls or details thereof
- F17C2203/06—Materials for walls or layers thereof; Properties or structures of walls or their materials
- F17C2203/0634—Materials for walls or layers thereof
- F17C2203/0636—Metals
- F17C2203/0648—Alloys or compositions of metals
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2203/00—Vessel construction, in particular walls or details thereof
- F17C2203/06—Materials for walls or layers thereof; Properties or structures of walls or their materials
- F17C2203/0634—Materials for walls or layers thereof
- F17C2203/0658—Synthetics
- F17C2203/066—Plastics
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2203/00—Vessel construction, in particular walls or details thereof
- F17C2203/06—Materials for walls or layers thereof; Properties or structures of walls or their materials
- F17C2203/0634—Materials for walls or layers thereof
- F17C2203/0658—Synthetics
- F17C2203/0663—Synthetics in form of fibers or filaments
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2203/00—Vessel construction, in particular walls or details thereof
- F17C2203/06—Materials for walls or layers thereof; Properties or structures of walls or their materials
- F17C2203/0634—Materials for walls or layers thereof
- F17C2203/0658—Synthetics
- F17C2203/0675—Synthetics with details of composition
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2209/00—Vessel construction, in particular methods of manufacturing
- F17C2209/21—Shaping processes
- F17C2209/2154—Winding
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2209/00—Vessel construction, in particular methods of manufacturing
- F17C2209/21—Shaping processes
- F17C2209/2154—Winding
- F17C2209/2163—Winding with a mandrel
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2209/00—Vessel construction, in particular methods of manufacturing
- F17C2209/22—Assembling processes
- F17C2209/225—Spraying
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2221/00—Handled fluid, in particular type of fluid
- F17C2221/01—Pure fluids
- F17C2221/012—Hydrogen
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
- F17C2223/01—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the phase
- F17C2223/0107—Single phase
- F17C2223/0123—Single phase gaseous, e.g. CNG, GNC
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
- F17C2223/03—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the pressure level
- F17C2223/036—Very high pressure (>80 bar)
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2260/00—Purposes of gas storage and gas handling
- F17C2260/01—Improving mechanical properties or manufacturing
- F17C2260/011—Improving strength
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2260/00—Purposes of gas storage and gas handling
- F17C2260/01—Improving mechanical properties or manufacturing
- F17C2260/012—Reducing weight
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2270/00—Applications
- F17C2270/01—Applications for fluid transport or storage
- F17C2270/0165—Applications for fluid transport or storage on the road
- F17C2270/0168—Applications for fluid transport or storage on the road by vehicles
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2270/00—Applications
- F17C2270/01—Applications for fluid transport or storage
- F17C2270/0165—Applications for fluid transport or storage on the road
- F17C2270/0184—Fuel cells
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/32—Hydrogen storage
Definitions
- the present invention relates to a pressure accumulator (hydrogen storage tank) that stores high-pressure hydrogen.
- the container for storing hydrogen there is not only a fuel cell vehicle but also a pressure accumulator installed in a hydrogen-filling station in order to supply hydrogen to the fuel cell vehicle.
- a pressure accumulator since it is not necessary to pursue lightness as in a vehicle-mounted container, a pressure accumulator formed entirely of steel has been proposed (for example, see Patent Document 2).
- the outer circumference of the Cr-Mo steel liner is coated with FRP (fiber-reinforced plastic) to improve fatigue crack growth rate under high-pressure hydrogen environment (high-pressure hydrogen-environment).
- FRP fiber-reinforced plastic
- Patent Document 3 when a special component system Cr—Mo steel is used for the liner layer material (material for liner layer), the material cost becomes high, and there is a problem that the container cost becomes high. is there.
- a PAN-based carbon fiber (Polyacrylonitrile carbon fiber) used in Patent Document 3 is coated on a steel liner, it is necessary to coat the carbon fiber thickly, resulting in an increase in cost.
- the cost is appropriately suppressed, there is a problem that the number of fillings required for the hydrogen station pressure accumulator is destroyed before 100,000 times.
- the present invention is for solving the above-described problems, and an object thereof is to provide an inexpensive pressure accumulator while ensuring safety.
- the pressure accumulator of the present invention includes a liner layer in which hydrogen is accommodated, and the carbon fiber reinforced plastic layer coated on an outer periphery of the liner layer, and the liner layer Is made of low-alloy steel, and the carbon fiber reinforced resin layer is made of pitch-based carbon fiber.
- a pressure accumulator containing hydrogen having a liner layer and a carbon fiber reinforced resin layer provided outside the liner layer, The liner layer is made of low alloy steel, The said carbon fiber reinforced resin layer consists of pitch-type carbon fiber and resin.
- the pressure accumulator characterized by the above-mentioned.
- the liner layer is made of chrome molybdenum steel, nickel-chrome-molybdenum steel, manganese chrome steel, manganese steel, or boron-added steel ( The accumulator according to [1] or [2], which is made of any one of boron-added steel).
- the stress generated in the liner layer is designed to be equal to or less than the fatigue fracture critical stress at 100,000 times of repetition with hydrogen pressure using an accumulator [1] to [4] The accumulator according to any one of the above items.
- the minimum burst pressure (allowable minimum burst required for the accumulator containing hydrogen is required. It is possible to provide a lightweight and inexpensive pressure accumulator while satisfying both pressure and fatigue life.
- FIG. 1 is a configuration diagram of a hydrogen station including a pressure accumulator according to a preferred embodiment of the present invention.
- FIG. 2 is a graph of an SN curve showing the relationship between the stress S and the number of repetitions N of hydrogen filling and releasing until fracture in chromium molybdenum steel, which is a low alloy steel.
- FIG. 3 is a graph showing the relationship between the atmospheric smooth tensile strength (applied tensile strength) and the notch tensile strength (notch tensile strength) of a low alloy steel in the atmosphere and in a hydrogen environment.
- FIG. 4 is a graph showing pressure fluctuation (pressure fluctuation) generated in the liner layer 12 of the pressure accumulator 10 with respect to the filling (release) number N.
- FIG. 5 is a graph comparing the relationship between the strain and stress of carbon fiber and metal (the inclination angle of each line indicates stiffness ⁇ property).
- FIG. 6 is a schematic view showing a seamless steel pipe which is a part of the method for manufacturing the pressure accumulator of FIG.
- FIG. 7 is a diagram showing a drawing process (a), a painting process (b), and a carbon fiber reinforced resin layer forming process (c), which are a part of the manufacturing method of the pressure accumulator of FIG.
- FIG. 1 is a configuration diagram of a hydrogen station 1 including a pressure accumulator 10.
- the accumulator 10 is illustrated with the valve 20 and the boss 21 removed and a half of the pressure accumulator 10 cut away.
- the hydrogen station 1 has a curdle 2, a compressor 3, a pressure accumulator 10 connected to the compressor 3 via a pipe 6a, and a dispenser 4. is doing.
- the curdle 2 is a hydrogen supply source in which a plurality of gas cylinders (high pressure storage tanks) are assembled. The curdle 2 is filled with hydrogen at another location and transported to the hydrogen station 1.
- the compressor 3 is connected to the curdle 2 through a pipe 5 and is connected to the pressure accumulator 10 through a pipe 6 a and a valve 20. And the compressor 3 is filled with the hydrogen in the curdle 2 to the pressure accumulator 10 side, applying a pressure.
- the pressure accumulator 10 is a container that stores hydrogen inside, and is connected to the compressor 3 via the valve 20 described above and is connected to the dispenser 4 via a pipe 6b.
- the pressure accumulator 10 is set on a gantry while being laid down so as to prevent stress fluctuations as much as possible.
- the dispenser 4 is a discharge device that supplies hydrogen stored in the pressure accumulator 10 to a hydrogen tank 7 mounted on the fuel electric vehicle. The supply of hydrogen to the hydrogen tank 7 is performed by a pipe 6b. It is regulated by a valve 8 provided on the top.
- hydrogen is cooled by a cooler called a pre-cooler (not shown), and the cooled hydrogen is supplied to the hydrogen tank 7 mounted on the fuel cell vehicle. ing.
- the pressure accumulator 10 installed in the hydrogen station 1 When the pressure accumulator 10 installed in the hydrogen station 1 is filled with hydrogen, the hydrogen in the curdle 2 is filled in the pressure accumulator 10 via the pipe 6 a and the valve 20 while applying a filling pressure by the compressor 3. To be supplied.
- the hydrogen in the pressure accumulator 10 when hydrogen is supplied from the pressure accumulator 10 to the hydrogen tank 7, the hydrogen in the pressure accumulator 10 is supplied from the dispenser 4 to the hydrogen tank 7 via the pipe 6 b and the valve 8.
- the pressure accumulator 10 is installed and fixed in the hydrogen station 1 and temporarily stores hydrogen supplied from the compressor 3 under high pressure, and has a function of sequentially supplying hydrogen to the dispenser 4 side.
- the accumulator 10 has, for example, a shape that is long in one direction, and has a length L of 2000 mm, an outer diameter ⁇ 1 of 500 mm, an inner diameter ⁇ 2 of 300 mm, and a capacity of 140 L.
- capacitance and each dimension of the pressure accumulator 10 are not restricted to this, It can set suitably according to installation location, required performance (required performance), etc.
- the accumulator 10 has a cylindrical portion 10a formed in a cylindrical shape and shoulders 10b and 10b provided at both ends of the cylindrical portion 10a. An internal space S1 is formed.
- the accumulator 10 is a so-called double boss structure in which holes 10c and 10d are opened at both ends, and a valve 20 and a boss 21 are arranged in the holes.
- a valve 20 is fixed to one hole 10c by screwing or the like, and hydrogen is supplied and discharged through the valve 20.
- the other hole 10d is sealed with a boss 21 inserted therein.
- the bulb 20 and the boss 21 are made of metal so that they can also serve as earth for discharging static electricity (static electricity) accumulated in the liner layer 12 to the ground. Is preferred.
- the pressure accumulator 10 has a liner layer 12 in which hydrogen is accommodated, and a carbon fiber reinforced resin layer 14 coated on the outer periphery of the liner layer 12.
- the liner layer 12 is provided over the entire inner surface, and as shown in the partially enlarged view surrounded by the alternate long and short dash line in FIG. 1, the thickness W1 of the body portion 10a is about 20-60 mm. Further, since the liner layer 12 in the shoulder portion 10b is curved and stress is easily concentrated as compared with the body portion 10a, the thicknesses W4 and W5 are larger than the thickness W1 of the body portion 10a. Furthermore, it is preferable that the thickness W4 around the valve 20 serving as the hydrogen supply port and the discharge port be larger than the thickness W5 around the boss 21 for simply sealing the hole 10d.
- the dimensions are preferably W1 ⁇ W5 ⁇ W4.
- the liner layer 12 has a gas barrier function (gas (barrier property) and a container strength function (assuming that a microcrack is generated on the inner surface and the crack portion is removed by cutting and polishing. It is preferable to set a thickness margin in advance so that the strength can be maintained. Thus, for example, the cracked inner surface of the liner layer 12 is scraped off during periodic inspection, and the progress of the crack can be prevented while securing the role of the liner layer 12.
- the liner layer 12 is made of a low alloy steel, and in particular, chromium molybdenum steel JIS SCM steel, nickel chromium molybdenum steel JIS SNCM steel, manganese chromium steel JIS SSMn steel, manganese steel JIS SMn steel, or boron-added steel N28CB, N36CB. Or N46CB.
- the liner layer 12 is more preferably made of chromium molybdenum steel, which is available at a relatively low cost among low alloy steels.
- chromium molybdenum steel (SCM435) is C: 0.33-0.38 mass%, Si: 0.15-0.35 mass%, Mn: 0.60-0.90 mass%, P: 0.040. They are: mass% or less, S: 0.030 mass% or less, Cr: 0.90 to 1.20 mass%, Mo: 0.15 to 0.30 mass%.
- FIG. 2 is a SN curve showing the relationship between the stress S and the number of repetitions N of hydrogen filling and releasing until fracture in a chromium alloy steel which is a low alloy steel.
- a fatigue limit P fatigue failure limit stress
- the generated stress of the chromium molybdenum steel constituting the liner layer 12 is less than the fatigue limit P.
- the fatigue limit P of chromium molybdenum steel in a hydrogen environment is about 40% of the tensile strength.
- the tensile strength (tensile strength) is considered in consideration of the safety factor (safety ratio). It is preferable to set 25% as an upper limit of allowable stress (generated stress (liner generated stress)).
- Fig. 3 shows chromium molybdenum steel (SCM435 specified in JIS G4053 / AISI4135, SCM440 specified in JIS G4053), nickel chromium molybdenum steel (SNCM439 specified in JIS G4053), and high-tensile steel (specified in JIS G3128).
- SCM435 specified in JIS G4053 / AISI4135
- SCM440 specified in JIS G4053
- SNCM439 specified in JIS G4053
- high-tensile steel specified in JIS G3128
- tensile strength TS atmospheric tension
- the tensile strength TS of the liner layer 12 is preferably 1100 MPa or less from the viewpoint of hydrogen embrittlement, and more preferably less than 950 MPa for safety.
- a coating 16 is applied to the outer peripheral surface 12 a of the liner layer 12.
- the coating 16 is a powder coating in which a coating made of a powdered resin is attached to the outer peripheral surface 12a and then heated and melted to form a coating film.
- thermosetting powder coating based on a resin (epoxy resin) or the like can be used. In the present invention, it is preferable to use a thermosetting powder coating in consideration of heat at the time of hydrogen filling.
- the carbon fiber reinforced resin layer 14 is a layer for ensuring the required pressure resistance (mechanical strength) of the accumulator 10, and the outer circumference of the liner layer 12. The entire surface 12a is covered, and the thickness W3 in the case of FIG. 1 is set to about 45 mm.
- the carbon fiber reinforced resin layer 14 is a composite material in which carbon fiber is used as a reinforcing material and the strength is improved by impregnating the fiber with a resin, which is called CFRP (carbon-fiber-reinforced plastic). ing.
- the carbon fiber reinforced resin layer 14 is formed of pitch-based carbon fibers and a resin.
- the carbon fiber reinforced resin layer 14 may be a pitch-based carbon fiber made of continuous fibers, and may be a mesophase pitch-based carbon fiber or an isotropic pitch-based carbon fiber (isotropic). pitch-based (carbon fiber)).
- mesophase pitch-based carbon fiber that allows easy production of continuous fibers.
- the resin a thermosetting resin is preferably used, and an epoxy resin is more preferable.
- This pitch-based carbon fiber is manufactured as follows using coal tar pitch or petroleum pitch as a raw material. First, the viscosity and molecular weight are adjusted so that the pitch of the refined raw material can be heated and spun. Next, a fiber having a diameter of about 10 ⁇ m is formed through a nozzle while the spinning pitch is heated to 300 to 400 ° C. In this state, a treatment called infusibilizing treatment to add oxygen is performed to facilitate the bridge bond, and carbonization treatment is performed at 1500 to 2500 ° C. in an inert atmosphere. Pitch-based carbon fibers are produced by (carbonization).
- Pitch-based carbon fibers have plate-like crystals with a curved fiber cross section, and these crystals are regularly arranged and assembled along the fiber direction, and the orientation is high. Elastic modulus (elastic modulus) is larger than carbon fiber.
- pitch-based carbon fibers use products such as Mitsubishi Plastics (Mitsubishi Plastics, Inc.), Nippon Graphite Fiber (Nippon Graphite Carbon Corporation), Kureha (CORPORATION), and Osaka Gas Chemicals (OSAKA GAS ICAL CHEMICALS). be able to.
- volume content of carbon fiber in the carbon fiber reinforced resin layer can be determined according to Japanese Industrial Standards JIS K 7075 (1991), and is usually preferably in the range of 50% to 80%.
- the lightweight pressure accumulator 10 satisfying the basic performance can be provided at low cost. That is, as the basic performance of the pressure accumulator 10, the strength to withstand the filling pressure when filling with hydrogen (fatigue cycle ⁇ life) and the fatigue life (fatigue cycle life) Is required. If the strength is insufficient, the pressure accumulator 10 may burst, and if the fatigue strength is insufficient, leakage or the like may occur due to fatigue cracks. In particular, in the case of a pressure accumulator installed in the hydrogen station 1, fatigue strength corresponding to, for example, 100,000 or more pressurization cycles is required.
- pitch-based carbon fibers are carbon fibers that have just been developed. Although the pitch-based carbon fiber has a lower strength than the PAN-based carbon fiber, the pitch-based carbon fiber has a characteristic that the elastic modulus (also referred to as Young's modulus) is large and highly rigid.
- the Young's modulus of pitch-based carbon fibers is 400 to 1000 GPa, whereas the Young's modulus of PAN-based carbon fibers is about 230 GPa, and pitch-based carbon fibers have a higher Young's modulus than PAN-based carbon fibers (high Rigid).
- the tensile strength TS of the pitch-based carbon fiber is about 3000 to 4000 GPa, whereas the tensile strength TS of the PAN-based carbon fiber is about 5000 GPa, and the PAN-based carbon fiber is stronger than the pitch-based carbon fiber. Is excellent. These tensile strength and Young's modulus can be adjusted by the manufacturing method of carbon fiber.
- the rigidity (elastic modulus or Young's modulus) of the carbon fiber is about the same as that of steel, so the above two basic performances required for the pressure accumulator 10 are satisfied.
- the amount of carbon fiber that can set the manufacturing cost within an appropriate range the pressure increasing / decreasing cycle until destruction is about 10,000 times, and it may be used as an on-vehicle pressure accumulator. However, it cannot be used for a hydrogen station.
- the hydrogen is produced by cooperating the liner layer 12 made of low alloy steel and the carbon fiber reinforced resin layer 14 made of pitch-based carbon fiber having higher rigidity than steel.
- the knowledge was obtained that the pressure accumulator 10 satisfying both requirements of the strength capable of withstanding the filling pressure when accommodated and the rigidity satisfying 100,000 or more pressure increasing / decreasing cycles can be manufactured at a light weight and at a low cost.
- the pitch-based carbon fiber has an elongation of 1% or less.
- the rigidity of the steel is high, and the amount of deformation of the liner layer 12 when accumulating at a high pressure can be reduced. I found that I can do it.
- FIG. 4 is a schematic diagram showing the stress generated in the liner layer 12 of the pressure accumulator 10 with respect to the filling (release) frequency N.
- the generated stress is the maximum value P1max
- the generated stress is the maximum value Pmax ( ⁇ P1max).
- the maximum value of stress decreases.
- FIG. 5 is a schematic diagram comparing the relationship between the strain and stress of carbon fiber and metal (the inclination of each line indicates the elastic modulus (Young's modulus)).
- FIG. 5 shows the results of a tensile test in the elastic deformation range for test pieces having the same outer shape and thickness, where A is an aluminum alloy, B is a PAN-based carbon fiber, C is a steel material, D represents the rigidity of the pitch-based carbon fiber.
- the PAN-based carbon fiber B made of polyacrylonitrile as a raw material has higher rigidity (elastic modulus) than the aluminum alloy A.
- the PAN-based carbon fiber B is often used as the surface layer carbon fiber.
- the liner layer 12 is, for example, chromium molybdenum steel (C)
- the chromium molybdenum steel (C) has substantially the same rigidity (elastic modulus) as the PAN-based carbon fiber B (chromium molybdenum steel).
- the Young's modulus is around 210 GPa).
- pitch-based carbon fibers D having higher rigidity than the liner layer 12 made of chromium molybdenum steel (C) are used as the carbon fiber-reinforced resin layer 14 (the elastic modulus (Young's modulus) of the pitch-based carbon fibers D is 400). It is about 1000 GPa). Focusing on the fact that pitch-based carbon fibers have a modulus of elasticity (Young's modulus) that is about three times higher than that of chromium-molybdenum steel. It can be demonstrated greatly.
- a seamless tubular seamless steel pipe 30 is first formed (step 1: seamless steel pipe forming step). Specifically, a steel bar called billet is heated to a high temperature material and rolled in a mandrel mill, and the center is drilled with a tool to form a hollow pipe.
- the seamless steel pipe 30 is formed by adopting a so-called Mannesmann mill process.
- the liner layer 12 of FIG. 1 is formed from a seamless seamless steel pipe, and exhibits a uniform rigidity in the circumferential direction, and can form a layer resistant to internal pressure and torsion.
- the manufacturing method of the seamless steel pipe is not particularly defined, and it is preferable to form the inexpensive liner layer 12 by enabling mass production by rolling that punches a high temperature material during rolling.
- the seamless steel pipe 30 is rotated while spinning (spinning) is performed to form a shoulder 10b (step 2: drawing process), and then the hardness and In order to obtain toughness, so-called quenching and tempering are performed (step 3: heat treatment). Thereafter, barrel polishing of the inner surface of the container is performed (step 4: polishing process).
- a rod-like or strip-like non-woven abrasive material nonwovenbraabrasive material
- this is inserted from the mouth of the container and brought into contact with the inner surface of the container. ing.
- an electrode is arrange
- coating 16 (see FIG. 1) is applied to the outer peripheral surface 12a of the liner layer 12 (step 5: coating process).
- the coating of this manufacturing method is powder coating, and is applied by an electrostatic spray method (electrostatic spray method). For example, when the liner layer 12 is charged positively and sprayed while the paint side is charged minus, the paint adheres to the outer peripheral surface 12a. Thereafter, the film is heated in a baking oven to degas and smooth, and cooled to complete the coating film.
- pitch-based carbon fibers impregnated with a resin such as unsaturated polyester resin or epoxy resin are bonded to the outer peripheral surface 12a ( Specifically, it is wound on the coating surface), and then the resin is thermally cured to form the carbon fiber reinforced resin layer 14 of FIG. 1 (step 6: carbon fiber reinforced).
- Resin layer forming step the pitch-based carbon fiber having a large rigidity in the fiber direction (longitudinal direction) preferably uses only hoop winding in which the body portion 10a of the liner layer 12 is wound along the circumferential direction from the viewpoint of cost reduction. Thereby, the bulge of the circumferential direction of the liner layer 12 can be prevented.
- hydrogen is accommodated by having the liner layer 12 made of steel and containing hydrogen and the carbon fiber reinforced resin layer 14 made of pitch-based carbon fiber and covering the outer periphery of the liner layer 12. Therefore, it is possible to provide a lightweight and inexpensive pressure accumulator 10 that satisfies the basic performance required for the purpose.
- the hydrogen station 1 can satisfy all the basic performances required for the pressure accumulator 10.
- the upper limit of Young's modulus is about 1000 GPa.
- the design factor is 2.5 to 4.5.
- the pitch-based carbon fiber has higher rigidity (Young's modulus) than the low alloy steel, even if the liner layer 12 is made of low alloy steel, the carbon fiber reinforced resin layer 14 can be used for self-adhesive treatment.
- the elastic deformation range of the accumulator 10 can be expanded.
- the liner layer 12 is formed by a seamless steel pipe that is pierced during rolling of a high temperature material
- the seamless steel pipe has no joints, so it has excellent uniformity in the circumferential direction and has the original characteristics of the steel material.
- the effect of making the design of the generated stress on the liner layer 12 described above below the fatigue failure limit stress (fatigue failure limit ⁇ stress) is effectively secured.
- the rolled seamless steel pipe can be mass-produced, and a cheaper accumulator can be manufactured.
- the coating 16 when the coating 16 is given to the outer peripheral surface 12a of the liner layer 12, the rust of the liner layer 12 which consists of steel materials can be prevented effectively. That is, moisture may accumulate at the interface between the carbon fiber reinforced resin layer 14 and the liner layer 12 due to deterioration of the carbon fiber reinforced resin layer 14 exposed to the outside air or the like. If it does so, the liner layer 12 may generate
- the embodiment of the present invention is not limited to the above embodiment.
- the case where the carbon fiber reinforced resin layer 14 is made of pitch-based carbon fibers is illustrated.
- GFRP with glass fibers as reinforcing fibers may be coated on the surface.
- the case where the pressure accumulator 10 is installed in the hydrogen station 1 is illustrated in FIG. 1, it may be installed in a place other than the hydrogen station 1.
- a hydrogen pressure accumulator composed of the liner layer 12 shown in Table 1 and the carbon fiber reinforced resin layer 14 using the carbon fibers shown in Table 1 was produced.
- an epoxy resin which is a thermosetting resin
- the volume content rate of the carbon fiber in the carbon fiber reinforced resin layer 14 was 60%.
- a so-called type 2 container was produced in which only the trunk portion 10a was wound by hoop winding.
- a so-called type 3 container was also produced in which the end part was wound by helical winding in addition to the body part 10a.
- a water pressure of 210 MPa was applied in the case of a steel liner
- a water pressure of 166 MPa was applied in the case of an aluminum alloy liner.
- Table 1 below shows Examples 1 to 7 and Comparative Example 7 in which the carbon fiber reinforced resin layer 14 is made of pitch-based carbon fibers, and Comparative Examples 1 to 6 and Comparative Examples in which the carbon fiber-reinforced resin layer 14 is made of PAN-based carbon fibers. 8 is a table showing.
- “Hydrogen pressure” in Table 1 is the highest hydrogen pressure to be filled in the produced accumulator.
- the “liner generation stress” is the maximum stress generated in the liner layer 12 when hydrogen is charged at 82 MPa before the self-tightening treatment, and is determined by the thickness of the liner layer 12 and the thickness of the carbon fiber reinforced resin layer 14. Therefore, in Examples 1 to 7 and Comparative Examples 1 to 3, first, the thickness of the liner layer 12 is determined, and a predetermined allowable stress (liner generation stress in Table 1) is generated in the liner layer with 82 MPa applied. The thickness of the carbon fiber reinforced resin layer is determined by FEM analysis (finite element method analysis), and the carbon fiber reinforced resin layer 14 is produced based on the thickness.
- “Fatigue limit at a hydrogen pressure of 82 MPa” refers to the production of a round bar specimen (round bar type specimen) processed from a liner material to a parallel part diameter of 6 mm, and a stress ratio of 0.1% at a hydrogen pressure of 82 MPa.
- the fatigue fracture limit stress at 100,000 times of number ⁇ ⁇ ⁇ ⁇ of cycles when a fatigue test is performed under the above conditions. The test was conducted according to JIS Z2273.
- the “presence / absence of destruction at 100,000 times” is the presence / absence of destruction of the pressure accumulator when hydrogen is sealed in the container up to 82 MPa and the discharge is repeated 100,000 times. In all cases where leakage or destruction occurred, damage was observed in the body 10a.
- the stress generated at both end portions is 1 ⁇ 2 of the stress generated at the body portion 10a, and the breakage occurs from the body portion 10a. Similar results are expected even when the hydrogen pressure is 110 MPa.
- Examples 1, 2, 3, 6, 7 and Comparative Examples 1, 2, 5, 8 use chrome molybdenum steel (SCM435), which is a low alloy steel, as the liner layer 12, and Examples 4, 5 Nickel chromium molybdenum steel (SNCM439), which is a low alloy steel, is used.
- SCM435 chrome molybdenum steel
- SNCM439 Nickel chromium molybdenum steel
- 34CrMo44 steel described in JP2009-293799A was used as the liner layer 12
- an aluminum alloy A6061
- the weight of the carbon fiber per 1000 mm of the body length (length of ⁇ ⁇ cylindrical drum (deleted) part) of the hydrogen pressure accumulator 10 was set to 500 kg or less as a standard.
- Comparative Example 1, Example 3 and Comparative Example 2 when the same liner layer 12 is used to satisfy the above-described predetermined strength and rigidity, a carbon fiber reinforced resin layer Compared with the case of using a PAN-based carbon fiber, the thickness and weight of the pitch-based carbon fiber 14 can be reduced to about 1/3. Moreover, the use of pitch-based carbon fibers can reduce the carbon fiber weight per 1000 mm of the body length of the hydrogen pressure accumulator 10 to 500 kg or less.
- the thickness and weight of the carbon fiber reinforced resin layer 14 are as follows. I found that there was almost no change. Further, as shown in Example 5, good characteristics were obtained by combining the carbon fiber reinforced resin layer 14 using pitch-based carbon fibers and the liner layer 12 made of nickel chromium molybdenum steel (SNCM439). As can be seen from the comparison between Example 3 and Example 6 and Example 1 and Example 7, even when the same liner-generated stress is set, the thickness of the carbon fiber reinforced resin layer 14 is reduced when self-tightening is performed.
- the carbon fiber reinforced resin layer 14 using the PAN-based carbon fiber and the comparative example 5 and the comparative example 8 using the SCM435 as the material of the liner layer 12 are subjected to the self-tightening treatment. It is destroyed at 50,000 times and it can be seen that there is no effect of self-treatment. Also, a carbon fiber reinforced resin layer 14 using PAN-based carbon fibers, which is Comparative Example 6 using an aluminum alloy as the material of the liner layer 12, and a carbon fiber reinforced resin layer 14 using pitch-based carbon fibers.
- Comparative Example 3 shows a hydrogen pressure accumulator 10 manufactured with a configuration conventionally known for an in-vehicle hydrogen tank. As shown in Comparative Example 4, when an aluminum alloy is used for the liner layer 12 and a PAN-based carbon fiber conventionally used for the carbon fiber reinforced resin layer 14 is used, the carbon fiber reinforced considerably compared to the examples of the present invention.
- the liner generated stress (155 MPa) obtained by calculation exceeds the “fatigue limit in a hydrogen pressure of 82 MPa” (fatigue fracture limit stress) (100 MPa), and is actually 100,000 times In the pressure / decompression cycle test, leakage occurred.
- a pressure accumulator was manufactured using PAN-based carbon fiber in the same steel liner as in Example 1.
- the liner generated stress (500 GPa) calculated by the calculation exceeds the “fatigue limit at a hydrogen pressure of 82 MPa” (fatigue fracture limit stress) (380 GPa), and leakage occurs even in actual 100,000 pressurization cycle tests. occured.
- the liner layer has a fatigue fracture limit stress of 250 MPa or more after 100,000 cycles at a hydrogen pressure of 82 MPa. Furthermore, if the fatigue fracture limit stress of the liner layer is 400 MPa or more, the design factor can be made 2.5 or less, and the cost can be further reduced, which is more preferable.
- the strength (rupture) of the container containing hydrogen and the fatigue strength against the pressurization cycle are thus, it is possible to provide the pressure accumulator 10 that is lightweight and inexpensive while satisfying both requirements.
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Abstract
Description
〔1〕ライナー層と、前記ライナー層の外側に設けられた炭素繊維強化樹脂層とを有する水素を収容する蓄圧器であり、
前記ライナー層は、低合金鋼からなり、
前記炭素繊維強化樹脂層は、ピッチ系炭素繊維と樹脂とからなる
ことを特徴とする蓄圧器。
〔2〕前記炭素繊維強化樹脂層の炭素繊維のヤング率(Young's modulus)は、400GPa以上であることを特徴とする〔1〕に記載の蓄圧器。
〔3〕前記ライナー層は、クロムモリブデン鋼(chrome molybdenum steel)、ニッケルクロムモリブデン鋼(nickel-chrome-molybdenum steel)、マンガンクロム鋼(manganese chrome steel)、マンガン鋼(manganese steel)もしくはボロン添加鋼(boron-added steel)のうちいずれか1つからなることを特徴とする〔1〕または〔2〕に記載の蓄圧器。
〔4〕前記ライナー層の発生応力(generated stress)の設計係数(design factor)は、2.5以上であることを特徴とする〔1〕~〔3〕のいずれか1項に記載の蓄圧器。
〔5〕前記ライナー層の発生応力が、蓄圧器を使用する水素圧での繰り返し数10万回での疲労破壊限度応力(fatigue fracture critical stress)以下に設計された〔1〕~〔4〕のいずれか1項に記載の蓄圧器。
〔6〕前記ライナー層の、水素圧力82MPa中での繰り返し数10万回での疲労破壊限度応力が250MPa以上であることを特徴とする〔1〕~〔5〕のいずれか1項に記載の蓄圧器。
〔7〕前記ライナー層が自緊処理(auto-frettage)されていることを特徴とする〔1〕~〔6〕のいずれか1項に記載の蓄圧器。
〔8〕前記ライナー層は、高温材料(high-temperature material)を圧延中に穿孔する(piercing)シームレス鋼管(seamless steel tube)により形成されていることを特徴とする〔1〕~〔7〕のいずれか1項に記載の蓄圧器。
〔9〕前記ライナー層の外周面に粉体塗装(powder coating)が施されていることを特徴とする〔1〕~〔8〕のいずれか1項に記載の蓄圧器。
である。
図1は、蓄圧器10を含む水素ステーション1の構成図である。なお、理解の便宜のため、蓄圧器10は、バルブ(valve)20とボス(boss)21を外し、一部の半体を切り欠いて図示している。図1に示すように、水素ステーション1は、カードル(curdle)2、圧縮機(compressor)3、圧縮機3に配管6aを介して接続された蓄圧器10と、ディスペンサー(dispenser)4とを有している。カードル2は複数のガスボンベ(high pressure storage tank)を集合させた水素の供給源であり、別の場所で水素が充填され水素ステーション1に搬送される。
次に、蓄圧器10について詳細に説明する。蓄圧器10は、例えば一方向に長い形状を有しており、長さLが2000mm、外径φ1が500mm、内径φ2が300mm、容量が140Lに形成されている。なお、蓄圧器10の容量や各寸法はこれに限られるものではなく、設置場所(installation location)や要求性能(required performance)等に合わせて適宜設定することができる。
次に、上述した蓄圧器10の好ましい製造方法を図6及び図7により説明する。まず、図6に示すように、先ず、継ぎ目のない筒状のシームレス鋼管30が形成される(ステップ1:シームレス鋼管の形成工程)。具体的には、丸棒状のビレット(billet)という鋼の塊を加熱して高温材料とし、それをマンドレルミル(mandrel mill)で圧延しながら、その中心を工具で穿孔して中空状のパイプを形成する所謂マンネスマン製管法(Mannesmann mill process)を採用することにより、シームレス鋼管30を形成する。また、図1のライナー層12は、継ぎ目のないシームレス鋼管から形成されており、周方向に均質な剛性を発揮し、内圧(internal pressure)やねじれ(torsion)に強い層を形成できる。そして、このシームレス鋼管では溶接等の継ぎ目に応力が集中することもなく、上述したライナー層12への発生応力の設計を疲労破壊限度応力以下にした効果が有効に担保される。なお、シームレス鋼管の製造方法は特に規定されることはなく、高温材料を圧延中に穿孔する圧延加工により、大量生産を可能とし、安価なライナー層12を形成するのが好ましい。
Claims (9)
- ライナー層と、前記ライナー層の外側に設けられた炭素繊維強化樹脂層とを有する水素を収容する蓄圧器であり、
前記ライナー層は、低合金鋼からなり、
前記炭素繊維強化樹脂層は、ピッチ系炭素繊維と樹脂とからなる
ことを特徴とする蓄圧器。 - 前記炭素繊維強化樹脂層の炭素繊維のヤング率は、400GPa以上であることを特徴とする請求項1に記載の蓄圧器。
- 前記ライナー層は、クロムモリブデン鋼、ニッケルクロムモリブデン鋼、マンガンクロム鋼、マンガン鋼もしくはボロン添加鋼のうちいずれか1つからなることを特徴とする請求項1または2に記載の蓄圧器。
- 前記ライナー層の発生応力の設計係数は、2.5以上であることを特徴とする請求項1~3のいずれか1項に記載の蓄圧器。
- 前記ライナー層の発生応力が、蓄圧器を使用する水素圧での繰り返し数10万回での疲労破壊限度応力以下に設計された請求項1~4のいずれか1項に記載の蓄圧器。
- 前記ライナー層の、水素圧力82MPa中での繰り返し数10万回での疲労破壊限度応力が250MPa以上であることを特徴とする請求項1~5のいずれか1項に記載の蓄圧器。
- 前記ライナー層が自緊処理されていることを特徴とする請求項1~6のいずれか1項に記載の蓄圧器。
- 前記ライナー層は、高温材料を圧延中に穿孔するシームレス鋼管により形成されていることを特徴とする請求項1~7のいずれか1項に記載の蓄圧器。
- 前記ライナー層の外周面に粉体塗装が施されていることを特徴とする請求項1~8のいずれか1項に記載の蓄圧器。
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Also Published As
Publication number | Publication date |
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EP2990714A1 (en) | 2016-03-02 |
EP2990714B1 (en) | 2018-11-21 |
US10837602B2 (en) | 2020-11-17 |
JP5956602B2 (ja) | 2016-07-27 |
US20160091140A1 (en) | 2016-03-31 |
CA2912415C (en) | 2017-08-29 |
CA2912415A1 (en) | 2014-10-30 |
EP2990714A4 (en) | 2016-04-13 |
JPWO2014174845A1 (ja) | 2017-02-23 |
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