US20130192806A1 - Multilayer heat exchanger and heat exchange system - Google Patents

Multilayer heat exchanger and heat exchange system Download PDF

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Publication number
US20130192806A1
US20130192806A1 US13/731,276 US201213731276A US2013192806A1 US 20130192806 A1 US20130192806 A1 US 20130192806A1 US 201213731276 A US201213731276 A US 201213731276A US 2013192806 A1 US2013192806 A1 US 2013192806A1
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Prior art keywords
heat exchange
flow passage
plate
heat exchanger
fluid
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US13/731,276
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English (en)
Inventor
Koji Noishiki
Yasutake Miwa
Hiroyuki Ban
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Kobe Steel Ltd
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Kobe Steel Ltd
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Assigned to KABUSHIKI KAISHA KOBE SEIKO SHO (KOBE STEEL, LTD.) reassignment KABUSHIKI KAISHA KOBE SEIKO SHO (KOBE STEEL, LTD.) ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: BAN, HIROYUKI, MIWA, YASUTAKE, NOISHIKI, KOJI
Publication of US20130192806A1 publication Critical patent/US20130192806A1/en
Abandoned legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D9/00—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D9/02—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the heat-exchange media travelling at an angle to one another
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F3/00—Plate-like or laminated elements; Assemblies of plate-like or laminated elements
    • F28F3/08—Elements constructed for building-up into stacks, e.g. capable of being taken apart for cleaning
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/58—Cooling; Heating; Diminishing heat transfer
    • F04D29/582—Cooling; Heating; Diminishing heat transfer specially adapted for elastic fluid pumps
    • F04D29/5826—Cooling at least part of the working fluid in a heat exchanger
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D9/00—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D9/0031—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by paired plates touching each other
    • F28D9/0043—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by paired plates touching each other the plates having openings therein for circulation of at least one heat-exchange medium from one conduit to another
    • F28D9/005—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by paired plates touching each other the plates having openings therein for circulation of at least one heat-exchange medium from one conduit to another the plates having openings therein for both heat-exchange media
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D9/00—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D9/0062—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by spaced plates with inserted elements
    • F28D9/0075—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by spaced plates with inserted elements the plates having openings therein for circulation of the heat-exchange medium from one conduit to another
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D9/00—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D9/0093—Multi-circuit heat-exchangers, e.g. integrating different heat exchange sections in the same unit or heat-exchangers for more than two fluids
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F3/00—Plate-like or laminated elements; Assemblies of plate-like or laminated elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D9/00—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D9/0031—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by paired plates touching each other
    • F28D9/0043—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by paired plates touching each other the plates having openings therein for circulation of at least one heat-exchange medium from one conduit to another
    • F28D9/0056—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by paired plates touching each other the plates having openings therein for circulation of at least one heat-exchange medium from one conduit to another with U-flow or serpentine-flow inside conduits; with centrally arranged openings on the plates

Definitions

  • the present invention relates to a multilayer heat exchanger formed by stacking flow passage plates, and a heat exchange system in which this multilayer heat exchanger is used.
  • the heat exchanger used at this time includes a so-called fin type or plate type heat exchanger, and for example Japanese Unexamined Patent Application Publication No. 2000-283668 discloses such a heat exchanger.
  • the plate type heat exchanger having an integral structure that an interior is partitioned into a plurality of units by a partition wall, at least one of the plurality of units has a plurality of fluid inlets or outlets, and at least one side connecting to the inlets and the outlets forms a plurality of different heating flow passages or heated flow passages in the plurality of units.
  • a compression of a gas is not limited only to a so-called one-step type compression in which a gas is compressed only once by one compressor but a multi-step type compression in which a gas successively passes through a plurality of compressors so that the gas once compressed by a compressor is further compressed by a next-step compressor may be performed.
  • a temperature of the gas is increased every time when the gas is compressed by the compressor.
  • the compressed gas passes through and is cooled in a heat exchanger before being supplied to the next-step compressor. That is, there is a need for preparing the same number of heat exchangers as the number of the compressors so as to establish a multi-step type compression system in which the plurality of heat exchangers and also the plurality of compressors are alternately connected in series.
  • the conventional heat exchanger is not suitable for treating the gas whose pressure is greatly increased by the multi-step type compression.
  • development of a heat exchanger having high pressure resistance is also an important challenge.
  • an object of the present invention is to provide a compact multilayer heat exchanger having high pressure resistance and a heat exchange system in which the multilayer heat exchanger is used.
  • the present invention adopts the following technical means.
  • a multilayer heat exchanger includes a plurality of stacked heat exchange units for performing heat exchange of a fluid fed out from a plurality of machines, wherein each of the heat exchange units has a structure that a plurality of flow passage plates is stacked, and each of the flow passage plates has concave grooves formed on a surface as flow passages of the fluid.
  • Each of the plurality of heat exchange units may be paired with each of the plurality of machines. In other words, each of the plurality of heat exchange units may be in one-to-one correspondence with each of the plurality of machines.
  • each of the plurality of heat exchange units is provided with a supply hole through which the fluid is supplied to the heat exchange unit and a discharge hole through which the supplied fluid is discharged, and the supply hole and the discharge hole provided in each of the heat exchange units are formed with length to directly communicate with an exterior along the stacking direction of the heat exchange unit in such a manner that arrangement positions thereof in a plan view are not overlapped with each other.
  • the flow passage plates may be made of metal, and the flow passages of the flow passage plates may be formed by chemical etching.
  • the stacked metal flow passage plates are bonded to each other by diffusion-bonding.
  • a heat exchange system includes a plurality of machines for changing a heat amount of a fluid, and a multilayer heat exchanger formed by stacking heat exchange units for performing heat exchange of the fluid whose heat amount is changed by the plurality of machines, wherein the multilayer heat exchanger is the multilayer heat exchanger described above.
  • the compact heat exchanger having high pressure resistance and the heat exchange system can be obtained.
  • FIG. 1 is a concept view showing a configuration of a multi-step type heat exchange system:
  • FIG. 1A is a concept view showing a configuration of a conventional heat exchange system;
  • FIG. 1B is a concept view showing a configuration of a heat exchange system according to a first embodiment of the present invention
  • FIG. 2 is a view showing a section structure of a multilayer heat exchanger according to the first embodiment
  • FIG. 3 is a view showing a section structure of the multilayer heat exchanger according to the first embodiment
  • FIG. 4 is a plan concept view showing a configuration of all plates forming the multilayer heat exchanger according to the first embodiment
  • FIG. 5 is a plan view showing a configuration of the plates forming the multilayer heat exchanger according to the first embodiment: FIG. 5A is a plan view showing a configuration of a flow passage plate; and FIG. 5B is a plan view showing a configuration of a cooling plate;
  • FIG. 6 is a view for illustrating differential pressures of a fluid supplied to heat exchange units of the multilayer heat exchanger according to the first embodiment
  • FIG. 7 is a plan view showing a configuration of a cooling plate used for a multilayer heat exchanger according to a second embodiment of the present invention.
  • FIG. 8 is a view showing a section structure of the multilayer heat exchanger according to the second embodiment.
  • FIG. 9 is a view showing a section structure of the multilayer heat exchanger according to the second embodiment.
  • FIG. 1 is a concept view showing a configuration of a multi-step type heat exchange system in which compressors serving as a plurality of machines and a plurality of heat exchangers are used.
  • FIG. 1A is a concept view showing a configuration of a heat exchange system in which conventional heat exchangers are used
  • FIG. 1B is a concept view showing a configuration of a heat exchange system 1 a in which a multilayer heat exchanger 2 a according to the present embodiment is used.
  • the heat exchanger in a multi-step type compression process for successively pressurizing and compressing a gas by a plurality of compressors connected in series so as to change the gas into a high-pressure gas, the heat exchanger is provided in a subsequent step to the compressors.
  • the heat exchange system shown in FIG. 1A shows the configuration of a case where the conventional heat exchangers are used.
  • the heat exchange system of FIG. 1A includes four compressors of first to fourth compressors denoted by 1st-comp to 4th-comp, and four heat exchangers of first to fourth heat exchangers denoted by 1st-ex to 4th-ex.
  • a discharge port of the first compressor is connected to a suction port of the first heat exchanger by a pipe
  • a discharge port of the first heat exchanger is connected to a suction port of the second compressor by a pipe.
  • the conventional heat exchange system is formed as shown in FIG. 1A while connecting the discharge ports of the compressors and the suction ports of the heat exchangers.
  • the heat exchange system 1 a shown in FIG. 1B includes compressors serving as four machines of first to fourth compressors C 1 to C 4 denoted by 1st-comp to 4th-comp, and the multilayer heat exchanger 2 a formed by stacking and integrating four heat exchange units of first to fourth heat exchange units U 1 to U 4 denoted by 1st-unit to 4th unit.
  • the first to fourth heat exchange units U 1 to U 4 of the multilayer heat exchanger 2 a shown in FIG. 1B perform operations corresponding to the conventional first to fourth heat exchangers shown in FIG. 1A .
  • the first heat exchange unit U 1 performs heat exchange (cooling) of a high-temperature fluid discharged from the first compressor C 1
  • the second heat exchange unit U 2 performs heat exchange (cooling) of the high-temperature fluid discharged from the second compressor C 2
  • the third heat exchange unit U 3 performs heat exchange (cooling) of the high-temperature fluid discharged from the third compressor C 3
  • the fourth heat exchange unit U 4 performs heat exchange (cooling) of the high-temperature fluid discharged from the fourth compressor C 4 .
  • the heat exchange system 1 a has the plurality of machines (such as the first to fourth compressors C 1 to C 4 ) for changing a heat amount of the fluid (such as a hydrogen gas), and the multilayer heat exchanger 2 a formed by stacking the heat exchange units (such as the first to fourth heat exchange units U 1 to U 4 ) for performing heat exchange of the fluid whose heat amount is changed by the plurality of machines.
  • the plurality of machines such as the first to fourth compressors C 1 to C 4
  • the multilayer heat exchanger 2 a formed by stacking the heat exchange units (such as the first to fourth heat exchange units U 1 to U 4 ) for performing heat exchange of the fluid whose heat amount is changed by the plurality of machines.
  • a state that the plurality of machines for changing the heat amount of the fluid is connected in series so as to form one flow passage is called as a state that the plurality of machines is connected in multiple steps.
  • the hydrogen gas serving as the fluid flows through one flow passage formed by the multiple steps of the compressors C 1 to C 4 from the first compressor C 1 , the second compressor C 2 , the third compressor C 3 , to the fourth compressor C 4 in this order.
  • the heat amount of the hydrogen gas is changed and a temperature of the gas is increased every time when the gas passes through the compressors C 1 to C 4 .
  • the high-temperature hydrogen gas compressed (pressurized) in the first compressor C 1 flows into the first heat exchange unit U 1 of the multilayer heat exchanger 2 a so as to be cooled, and is suctioned into the second compressor C 2 in the next step.
  • the suctioned hydrogen gas is further compressed by the second compressor C 2 so as to have a higher temperature and returned to the multilayer heat exchanger 2 a , and flows into the second heat exchange unit U 2 so as to be cooled.
  • the fluid discharged from the first compressor C 1 flows into the first heat exchange unit U 1
  • the fluid discharged from the second compressor C 2 flows into the second heat exchange unit U 2 .
  • the first compressor C 1 and the first heat exchange unit U 1 are paired with each other
  • the second compressor C 2 and the second heat exchange unit U 2 are paired with each other.
  • the third compressor C 3 and the third heat exchange unit U 3 are paired with each other
  • the fourth compressor C 4 and the fourth heat exchange unit U 4 are paired with each other.
  • a flow rate of cooling water can be controlled for each unit according to a layering method so that the cooling water performs cooling, or the cooling water can perform cooling all the units at once.
  • the multilayer heat exchanger 2 a according to the present embodiment realizes functions of the plurality of heat exchangers in the conventional heat exchange system by an integrated flow passage structure.
  • the multilayer heat exchanger 2 a according to the present embodiment can be downsized more than the conventional heat exchangers, and piping with the compressors can be simply and easily organized. Further, an area of an installment place required for installing the heat exchange system including compressors can be reduced.
  • FIG. 2 is a view of a structure of the multilayer heat exchanger 2 a , showing an A-A section and a C-C section of the multilayer heat exchanger 2 a .
  • FIG. 3 is a view showing a B-B section of the multilayer heat exchanger 2 a.
  • the multilayer heat exchanger 2 a is formed by stacking the first to fourth heat exchange units U 1 to U 4 denoted by 1st to 4th, stacking an upper surface board (upper end plate) 3 on an upper surface of the stacked body, and stacking a lower surface board (lower end plate) 4 on a lower surface.
  • Each of the first to fourth heat exchange units U 1 to U 4 is formed by alternately stacking a plurality of flat flow passage boards (flow passage plates) in which flow passages of the hydrogen gas serving as the fluid are formed, and a plurality of flat flow passage boards (cooling plates) in which flow passages of the cooling water serving as a cooling medium are formed.
  • the plates may be stacked in such a manner that the both surface sides of the flow passage plate on the hydrogen side are sandwiched by the cooling plates.
  • an outer appearance of each of the first to fourth heat exchange units U 1 to U 4 is a cuboid shape in which the flat fluid plates and the cooling plates are stacked. Since such cuboid first to fourth heat exchange units U 1 to U 4 are stacked, the multilayer heat exchanger 2 a is formed in a cuboid shape which is high in the stacking direction of the first to fourth heat exchange units U 1 to U 4 .
  • FIG. 4 is a view showing all the plates forming the multilayer heat exchanger 2 a .
  • the first flow passage plate (1st plate) P 1 forming the first heat exchange unit U 1 is shown in a upper left part of FIG. 4
  • the third flow passage plate (3rd plate) P 3 , the fourth flow passage plate (4th plate) P 4 , and the second flow passage plate (2nd plate) P 2 are shown in this order toward the right side.
  • the flow passage plates P 1 to P 4 are shown in order of the 1st, 3rd, 4th, and 2nd plates from the left side based on the fact that the first to fourth heat exchange units U 1 to U 4 are stacked in order of the first, third, fourth, and second heat exchange units from the upper side in FIGS. 2 and 3 .
  • the upper surface board (upper end plate) 3 stacked on the upper surface of the multilayer heat exchanger is shown in a lower left part of FIG. 4 , and the cooling plate CP 1 stacked between the flow passage plates and the lower surface board (lower end plate) 4 stacked on the lower surface of the multilayer heat exchanger are shown in this order toward the right side.
  • FIG. 4 shows the configurations of the plates of the time when the multilayer heat exchanger 2 a is seen from the upper surface side, that is, when the multilayer heat exchanger is seen along the direction from the upper side of the upper end plate 3 to the lower end plate 4 .
  • the first heat exchange unit (1st heat exchange unit) U 1 in the multilayer heat exchanger 2 a is formed by alternately stacking the first flow passage plates (1st plates) P 1 and the cooling plates CP 1 .
  • the first flow passage plate P 1 is a flat rectangular board made of metal such as stainless or aluminum, the board having thickness of a few millimeters.
  • a fluid supply hole 1 IN through which the hydrogen gas supplied from the first compressor C 1 flows into the first flow passage plate P 1 is bored so as to form a through hole in a left part of the upper end in the figure.
  • a fluid discharge hole 1 OUT through which the hydrogen gas flows out from the first flow passage plate P 1 is bored so as to form a through hole in a right part of the lower end. That is, the fluid supply hole 1 IN and the fluid discharge hole 1 OUT are formed in the diagonal direction of the first flow passage plate P 1 .
  • flow passages for the hydrogen gas are formed so as to connect the fluid supply hole 1 IN and the fluid discharge hole 1 OUT.
  • the hydrogen gas flowing from the fluid supply hole 1 IN flows along the formed flow passages, and flows out from the fluid discharge hole 1 OUT to an exterior of the first flow passage plate.
  • FIG. 5A is a view showing a detailed configuration of the first flow passage plate P 1 shown in FIG. 4 .
  • the plurality of flow passages is formed in the first flow passage plate P 1 so as to meander in the width direction of the first flow passage plate P 1 and connect the fluid supply hole 1 IN and the fluid discharge hole 1 OUT.
  • the plurality of flow passages is formed so as not to cross each other but be substantially parallel to each other. Therefore, the hydrogen gas flowing from the fluid supply hole 1 IN reaches the fluid discharge hole 1 OUT through only one flow passage into which the gas flows.
  • the flow passages of the first flow passage plate P 1 meander in the width direction of the first flow passage plate P 1 in order to have as long flow passages as possible within a limited area of the first flow passage plate P 1 .
  • the flow passages may take a track other than the meandering track shown in FIGS. 4 and 5 .
  • Such flow passages are called as micro channels in the technical field of the present invention, the micro channels being thin flow passages having width of about 1 millimeter.
  • the flow passages called as the micro channels are formed with using an etching technique such as chemical etching. Since etching is isotropic work, depth of the flow passages is close to 0.5 times more than the width of the flow passages. However, in the present embodiment, the depth is about 0.4 to 0.6 times more than the width of the flow passages.
  • a fluid supply hole 3 IN serving as a through hole through which the hydrogen gas supplied from the third compressor C 3 flows into the third flow passage plate P 3 described later is bored in a right part of the upper end in the figure.
  • a fluid discharge hole 3 OUT serving as a through hole through which the hydrogen gas flows out from the third flow passage plate P 3 is bored in a left part of the lower end.
  • the fluid supply hole 3 IN and the fluid discharge hole 3 OUT are not connected to the flow passages of the first flow passage plate P 1 .
  • a cooling water hole IN serving as a through hole through which the cooling water flows into the cooling plate CP 1 described later is bored between the fluid discharge hole 1 OUT and the through hole of the fluid discharge hole 3 OUT, and a cooling water hole OUT serving as a through hole through which the cooling water flows out from the cooling plate CP 1 described later is bored between the fluid supply hole 1 IN and the through hole of the fluid supply hole 3 IN.
  • the cooling water hole IN and the cooling water hole OUT are not connected to the flow passages of the first flow passage plate P 1 .
  • the other surface of such a first flow passage plate P 1 that is, a lower surface (not shown) in which no flow passages are formed is a smooth surface.
  • the cooling plate CP 1 has a substantially similar configuration to the first flow passage plate P 1 and is made of the same material as the first flow passage plate P 1 .
  • a fluid supply hole 1 IN, a cooling water hole OUT, and a fluid supply hole 3 IN are formed at the same positions as the first flow passage plate P 1 in the upper end, and a fluid discharge hole 1 OUT, a cooling water hole IN, and a fluid discharge hole 3 OUT are similarly formed at the same positions as the first flow passage plate P 1 in the lower end.
  • FIG. 5B is a view showing a detailed configuration of the cooling plate CP 1 shown in FIG. 4 .
  • a plurality of flow passages is also formed in the cooling plate CP 1 so as to meander in the width direction as well as the first flow passage plate P 1 and connect the cooling water hole IN and the cooling water hole OUT.
  • the plurality of flow passages is also formed so as not to cross each other but be substantially parallel to each other as well as the first flow passage plate P 1 . Therefore, the cooling water flowing from the cooling water hole IN reaches the cooling water hole OUT through only one flow passage into which the water flows.
  • the other surface of such a cooling plate CP 1 that is, a lower surface (not shown) in which no flow passages are formed is a smooth surface.
  • the first heat exchange unit U 1 is formed by alternately stacking the first flow passage plates P 1 and the cooling plates CP 1 described above. Firstly, a cooling plate CP 1 is used as a lowermost layer of the first heat exchange unit U 1 , a first flow passage plate P 1 is stacked on the cooling plate, and another cooling plate CP 1 is further stacked on the first flow passage plate. In such a way, the first flow passage plates P 1 and the cooling plates CP 1 are alternately stacked to be multiple layers on the lowermost cooling plate CP 1 , and the other cooling plate CP 1 serves as an uppermost layer.
  • the number of the stacked first flow passage plates P 1 is arbitrary. However, by changing the number of the first flow passage plates P 1 , a capacity of the first heat exchange unit U 1 can be changed. This is applied to the second to fourth heat exchange units U 2 to U 4 described later. However, in the present embodiment, capacities of the first to fourth heat exchange units U 1 to U 4 are the same as each other.
  • the first heat exchange unit U 1 in which the plurality of plates is integrated is obtained. That is, the smooth lower surface of the first flow passage plate P 1 diffusion-bonded onto the cooling plate CP 1 serves as a lid for the flow passages of the cooling plate CP 1 , and the smooth lower surface of the cooling plate CP 1 diffusion-bonded onto the first flow passage plate P 1 serves as a lid for the flow passages of the first flow passage plate P 1 .
  • the first flow passage plate P 1 and the cooling plate CP 1 are firmly bonded to each other by this diffusion-bonding.
  • the first heat exchange unit U 1 has greatly high pressure resistance for the supplied fluid.
  • the hydrogen gas flows into the flow passages of the first flow passage plate P 1 connected to the fluid supply hole 1 IN.
  • the fluid supply hole is isolated from the flow passages of the cooling plate CP 1 by bonding of an upper surface of the cooling plate and the lower surface of the first flow passage plate, the hydrogen gas does not flow into the flow passages of the cooling plate CP 1 .
  • the cooling water when the cooling water is supplied from the cooling water hole IN, the cooling water flows into the flow passages of the cooling plate CP 1 connected to the cooling water hole IN. However, since the cooling water hole is isolated from the flow passages of the first flow passage plate P 1 by bonding of the upper surface of the first flow passage plate P 1 and the lower surface of the cooling plate CP 1 , the cooling water does not flow into the flow passages of the first flow passage plate P 1 .
  • the third heat exchange unit U 3 is a heat exchange unit arranged immediately below the first heat exchange unit U 1 .
  • the third flow passage plate P 3 used for the third heat exchange unit U 3 is a member of the substantially same material and size as the first flow passage plate P 1 , and similar flow passages to the first flow passage plate P 1 are formed.
  • a fluid supply hole 1 IN and a fluid discharge hole 1 OUT as formed in the first flow passage plate P 1 are not formed but a fluid supply hole 3 IN, a fluid discharge hole 3 OUT, a cooling water hole IN, and a cooling water hole OUT are formed.
  • the flow passages serving as micro channels are formed, and the fluid supply hole 3 IN and the fluid discharge hole 3 OUT are connected by the flow passages.
  • the third heat exchange unit U 3 is obtained.
  • the hydrogen gas when the hydrogen gas is supplied from the fluid supply hole 3 IN, the hydrogen gas flows into the flow passages of the third flow passage plate P 3 connected to the fluid supply hole 3 IN.
  • the fluid supply hole is isolated from the flow passages of the cooling plate CP 1 by bonding of the upper surface of the cooling plate CP 1 and a lower surface of the third flow passage plate P 3 , the hydrogen gas does not flow into the flow passages of the cooling plate CP 1 .
  • the cooling water when the cooling water is supplied from the cooling water hole IN, the cooling water flows into the flow passages of the cooling plate CP 1 connected to the cooling water hole IN. However, since the cooling water hole is isolated from the flow passages of the third flow passage plate P 3 by bonding of the upper surface of the third flow passage plate P 3 and the lower surface of the cooling plate CP 1 , the cooling water does not flow into the flow passages of the third flow passage plate P 3 .
  • the fourth heat exchange unit U 4 is a heat exchange unit arranged immediately below the third heat exchange unit U 3 .
  • the fourth flow passage plate P 4 used for the fourth heat exchange unit U 4 is a member of the substantially same material and size as the first flow passage plate P 1 and the third flow passage plate P 3 , and similar flow passages to the first flow passage plate P 1 and the third flow passage plate P 3 are formed.
  • the fourth flow passage plate P 4 has a configuration formed by mirror-reversing the configuration of the third flow passage plate P 3 , and through holes formed on a diagonal line are a fluid supply hole 4 IN and a fluid discharge hole 4 OUT.
  • a cooling water hole IN and a cooling water hole OUT are also formed in the fourth flow passage plate P 4 .
  • the flow passages serving as micro channels are formed, and the fluid supply hole 4 IN and the fluid discharge hole 4 OUT are connected by the flow passages.
  • the fourth heat exchange unit U 4 is obtained.
  • the hydrogen gas when the hydrogen gas is supplied from the fluid supply hole 4 IN, the hydrogen gas flows into the flow passages of the fourth flow passage plate P 4 connected to the fluid supply hole 4 IN.
  • the fluid supply hole is isolated from the flow passages of the cooling plate CP 1 by bonding of the upper surface of the cooling plate CP 1 and a lower surface of the fourth flow passage plate P 4 , the hydrogen gas does not flow into the flow passages of the cooling plate CP 1 .
  • the cooling water when the cooling water is supplied from the cooling water hole IN, the cooling water does not flow into the flow passages of the fourth flow passage plate P 4 for a similar reason to the first heat exchange unit U 1 and the third heat exchange unit U 3 .
  • the second heat exchange unit U 2 is a heat exchange unit arranged immediately below the fourth heat exchange unit U 4 .
  • the second flow passage plate P 2 used for the second heat exchange unit U 2 is a member of the substantially same material and size as the first flow passage plate P 1 , the third flow passage plate P 3 , and the fourth flow passage plate P 4 , and similar flow passages to the flow passage plates are formed.
  • the second flow passage plate P 2 has a configuration formed by mirror-reversing the configuration of the first flow passage plate P 1 , and through holes formed on a diagonal line which is different from a diagonal line connecting a fluid supply hole 4 IN and a fluid discharge hole 4 OUT are a fluid supply hole 2 IN and a fluid discharge hole 2 OUT.
  • a cooling water hole IN and a cooling water hole OUT are also formed in the second flow passage plate P 2 .
  • the flow passages serving as micro channels are formed, and the fluid supply hole 2 IN and the fluid discharge hole 2 OUT are connected by the flow passages.
  • the second heat exchange unit U 2 is obtained.
  • the hydrogen gas when the hydrogen gas is supplied from the fluid supply hole 2 IN, the hydrogen gas flows into the flow passages of the second flow passage plate P 2 connected to the fluid supply hole 2 IN.
  • the fluid supply hole is isolated from the flow passages of the cooling plate CP 1 by bonding of the upper surface of the cooling plate CP 1 and a lower surface of the second flow passage plate P 2 , the hydrogen gas does not flow into the flow passages of the cooling plate CP 1 .
  • the cooling water when the cooling water is supplied from the cooling water hole IN, the cooling water does not flow into the second flow passage plate P 2 for a similar reason to the first heat exchange unit U 1 , the third heat exchange unit U 3 , and the fourth heat exchange unit U 4 .
  • the heat exchange units U 1 to U 4 obtained as above are stacked in order of the first heat exchange unit U 1 , the third heat exchange unit U 3 , the fourth heat exchange unit U 4 , and the second heat exchange unit U 2 from the upper side. Further, the upper end plate 3 is placed on an upper surface of the first heat exchange unit U 1 , the lower end plate 4 is placed on a lower surface of the second heat exchange unit U 2 , and the heat exchange units U 1 to U 4 and the upper and lower end plates 3 and 4 are bonded to each other by diffusion-bonding.
  • the multilayer heat exchanger 2 a is formed.
  • a fluid supply hole 1 IN, a fluid discharge hole 1 OUT, a fluid supply hole 3 IN, a fluid discharge hole 3 OUT, a cooling water hole IN, and a cooling water hole OUT are opened as well as the first flow passage plate P 1 .
  • a fluid supply hole 2 IN, a fluid discharge hole 2 OUT, a fluid supply hole 4 IN, and a fluid discharge hole 4 OUT are opened.
  • the A-A section and the C-C section of the multilayer heat exchanger 2 a will be referred to.
  • the A-A section is a plane including the fluid supply hole 1 IN and the fluid discharge hole 3 OUT in the upper end plate 3 and the fluid supply hole 4 IN and the fluid discharge hole 2 OUT in the lower end plate 4 , showing a sectional view of the time when the multilayer heat exchanger 2 a is cut in the stacking direction.
  • the C-C section is a plane including the fluid supply hole 3 IN and the fluid discharge hole 1 OUT in the upper end plate 3 and the fluid supply hole 2 IN and the fluid discharge hole 4 OUT in the lower end plate 4 , showing a sectional view of the time when the multilayer heat exchanger 2 a is cut in the stacking direction.
  • the fluid supply hole 1 IN and the fluid discharge hole 1 OUT are formed on one diagonal line, and the fluid supply hole 3 IN and the fluid discharge hole 3 OUT are formed on the other diagonal line. Therefore, the fluid supply hole 1 IN shown in the A-A section and the fluid discharge hole 1 OUT shown in the C-C section corresponding to the fluid supply hole 1 IN are formed in such a manner that an interior of the first heat exchange unit U 1 directly communicates with an exterior along the stacking direction of the heat exchange units in the sections.
  • the fluid supply hole 3 IN shown in the C-C section and the fluid discharge hole 3 OUT shown in the A-A section corresponding to the fluid supply hole 3 IN are formed so as to penetrate the first heat exchange unit U 1 in such a manner that an interior of the third heat exchange unit U 3 directly communicates with the exterior along the stacking direction of the heat exchange units in the sections.
  • the fluid supply hole 4 IN and the fluid discharge hole 4 OUT are formed on one diagonal line, and the fluid supply hole 2 IN and the fluid discharge hole 2 OUT are formed on the other diagonal line. Therefore, the fluid supply hole 4 IN shown in the A-A section and the fluid discharge hole 4 OUT shown in the C-C section corresponding to the fluid supply hole 4 IN are formed so as to penetrate the second heat exchange unit U 2 in such a manner that an interior of the fourth heat exchange unit U 4 directly communicates with the exterior along the stacking direction of the heat exchange units in the sections.
  • the fluid supply hole 2 IN shown in the C-C section and the fluid discharge hole 2 OUT shown in the A-A section corresponding to the fluid supply hole 2 IN are formed in such a manner that an interior of the second heat exchange unit U 2 directly communicates with the exterior along the stacking direction of the heat exchange units in the sections.
  • the B-B section of the multilayer heat exchanger 2 a shown in FIG. 3 will be referred to.
  • the B-B section is a plane including the cooling water hole IN and the cooling water hole OUT in the upper end plate 3 , showing a sectional view of the time when the multilayer heat exchanger 2 a is cut in the stacking direction.
  • the cooling water hole IN and the cooling water hole OUT are formed on a B-B line along the longitudinal direction of the upper end plate 3 . Therefore, both the cooling water hole IN and the cooling water hole OUT are formed in all the heat exchange units U 1 to U 4 of the multilayer heat exchanger 2 a in the B-B section.
  • the fluid supply hole (supply hole) through which the fluid is supplied to each of the heat exchange units and the fluid discharge hole (discharge hole) through which the supplied fluid is discharged are provided in each of the plurality of heat exchange units U 1 to U 4 .
  • the supply holes and the discharge holes provided in the heat exchange units are formed with length to directly communicate with the exterior along the stacking direction of the heat exchange units U 1 to U 4 in such a manner that arrangement positions thereof in a plan view seen from the upper end plate 3 and the lower end plate 4 are not overlapped with each other. Since such a structure is adopted, there is no need for partition walls and the like for maintaining pressure between the heat exchange units.
  • each of the compressors in one-to-one correspondence with each of the heat exchange units is connected to each of the heat exchange units U 1 to U 4 of the multilayer heat exchanger 2 a in which the fluid supply holes and the fluid discharge holes are formed as described above. That is, a discharge port of the first compressor C 1 is connected to the fluid supply hole 1 IN of the upper end plate 3 , and the fluid discharge hole 1 OUT of the upper end plate 3 is connected to a suction port of the second compressor C 2 .
  • a discharge port of the second compressor C 2 is connected to the fluid supply hole 2 IN of the lower end plate 4 , and the fluid discharge hole 2 OUT of the lower end plate 4 is connected to a suction port of the third compressor C 3 .
  • a discharge port of the third compressor C 3 is connected to the fluid supply hole 3 IN of the upper end plate 3
  • the fluid discharge hole 3 OUT of the upper end plate 3 is connected to a suction port of the fourth compressor C 4 .
  • a discharge port of the fourth compressor C 4 is connected to the fluid supply hole 4 IN of the lower end plate 4
  • the fluid discharge hole 4 OUT of the lower end plate 4 is connected to a charge port of a tank or a cylinder.
  • a cooling water discharge port of a cooling water supply pump is connected to the cooling water hole IN of the upper end plate 3 , and a drainpipe is connected to the cooling water hole OUT.
  • FIG. 3 shows a flow of the cooling water.
  • the cooling water supply pump is operated so as to continuously supply the cooling water from the cooling water hole IN of the upper end plate 3 of the multilayer heat exchanger 2 a .
  • the supplied cooling water flows into the flow passages of the cooling plates of the heat exchange units from the cooling water hole IN penetrating from the first heat exchange unit U 1 of the uppermost layer to the second heat exchange unit U 2 of the lowermost layer, and is discharged to the cooling water hole OUT penetrating from the first heat exchange unit U 1 of the uppermost layer to the second heat exchange unit U 2 of the lowermost layer while filling the flow passages.
  • the cooling water Since the cooling water is continuously supplied by the cooling water supply pump, the cooling water discharged to the cooling water hole OUT through the flow passages of the cooling plates CP 1 is brought out from the cooling water hole OUT of the upper end plate 3 and discharged to the drainpipe. In such a way, the flow of the cooling water in all the cooling plates CP 1 of the heat exchange units U 1 to U 4 is ensured.
  • the first compressor C 1 serving as a first-step machine compresses the hydrogen gas.
  • the hydrogen gas in which pressure is boosted and a temperature is also increased is fed from the discharge port of the first compressor C 1 to the fluid supply hole 1 IN of the upper end plate 3 .
  • the hydrogen gas supplied to the fluid supply hole 1 IN flows into the flow passages of the first flow passage plate P 1 of the first heat exchange unit U 1 as a hydrogen gas flow ( 1 ). While flowing through the flow passages of the first flow passage plate P 1 , the high-temperature hydrogen gas flowing into the first flow passage plate P 1 is cooled by heat exchange with the cooling water flowing through the cooling plates CP 1 which are stacked on the upper and lower sides of the first flow passage plate.
  • the hydrogen gas flow ( 1 ) cooled in the first heat exchange unit U 1 is discharged from the flow passages of the first flow passage plate P 1 to the fluid discharge hole 1 OUT, and flows into the suction port of the second compressor C 2 serving as a second-step machine from the fluid discharge hole 1 OUT of the upper end plate 3 .
  • the second compressor C 2 compresses the hydrogen gas, and the hydrogen gas in which the pressure and the temperature are increased is fed from the discharge port of the second compressor C 2 to the fluid supply hole 2 IN of the lower end plate 4 .
  • the hydrogen gas supplied to the fluid supply hole 2 IN flows into the flow passages of the second flow passage plate P 2 of the second heat exchange unit U 2 as a hydrogen gas flow ( 2 ). While flowing through the flow passages of the second flow passage plate P 2 , the high-temperature hydrogen gas flowing into the second flow passage plate P 2 is cooled by heat exchange with the cooling water flowing through the cooling plates CP 1 which are stacked on the upper and lower sides of the second flow passage plate.
  • the hydrogen gas flow ( 2 ) cooled in the second heat exchange unit U 2 is discharged from the flow passages of the second flow passage plate P 2 to the fluid discharge hole 2 OUT, and flows into the suction port of the third compressor C 3 serving as a third-step machine from the fluid discharge hole 2 OUT of the lower end plate 4 .
  • the third compressor C 3 further compresses the hydrogen gas compressed by the first compressor C 1 and the second compressor C 2 , and the hydrogen gas in which the pressure and the temperature are increased is fed from the discharge port of the third compressor C 3 to the fluid supply hole 3 IN of the upper end plate 3 .
  • the hydrogen gas supplied to the fluid supply hole 3 IN flows into the flow passages of the third flow passage plate P 3 of the third heat exchange unit U 3 as a hydrogen gas flow ( 3 ). While flowing through the flow passages of the third flow passage plate P 3 , the high-temperature hydrogen gas flowing into the third flow passage plate P 3 is cooled by heat exchange with the cooling water flowing through the cooling plates CP 1 which are stacked on the upper and lower sides of the third flow passage plate.
  • the hydrogen gas flow ( 3 ) cooled in the third heat exchange unit U 3 is discharged from the flow passages of the third flow passage plate P 3 to the fluid discharge hole 3 OUT, and flows into the suction port of the fourth compressor C 4 serving as a fourth- or final-step machine from the fluid discharge hole 3 OUT of the upper end plate 3 .
  • the fourth compressor C 4 further compresses the hydrogen gas compressed up to the third compressor C 3 at targeted pressure, and the hydrogen gas in which the pressure and the temperature are increased is fed from the discharge port of the fourth compressor C 4 to the fluid supply hole 4 IN of the lower end plate 4 .
  • the hydrogen gas supplied to the fluid supply hole 4 IN flows into the flow passages of the fourth flow passage plate P 4 of the fourth heat exchange unit U 4 as a hydrogen gas flow ( 4 ). While flowing through the flow passages of the fourth flow passage plate P 4 , the high-temperature hydrogen gas flowing into the fourth flow passage plate P 4 is cooled by heat exchange with the cooling water flowing through the cooling plates CP 1 which are stacked on the upper and lower sides of the fourth flow passage plate.
  • the hydrogen gas flow ( 4 ) cooled in the fourth heat exchange unit U 4 is discharged from the flow passages of the fourth flow passage plate P 4 to the fluid discharge hole 4 OUT, and supplied to and charged in the charge port of the tank or the cylinder from the fluid discharge hole 4 OUT of the lower end plate 4 .
  • the multilayer heat exchanger 2 a formed by stacking and integrating the plurality of heat exchange units U 1 to U 4 is used, and every time when the fluid is compressed by the compressors, heat exchange of the fluid compressed by the plurality of compressors C 1 to C 4 in multiple steps is performed in the corresponding heat exchange unit.
  • An A-A section of FIG. 6 shows a differential pressure between the upper end plate 3 and the first heat exchange unit U 1 , differential pressures between the heat exchange units adjacent to each other, and a differential pressure between the second heat exchange unit U 2 and the lower end plate 4 ( ⁇ P).
  • the differential pressure between the upper end plate 3 and the first heat exchange unit U 1 is 5 MPa
  • the differential pressure between the first heat exchange unit U 1 and the third heat exchange unit U 3 is 20 MPa
  • the differential pressure between the third heat exchange unit U 3 and the fourth heat exchange unit U 4 is 30 MPa
  • the differential pressure between the fourth heat exchange unit U 4 and the second heat exchange unit U 2 is 40 MPa
  • the differential pressure between the second heat exchange unit U 2 and the lower end plate 4 is 10 MPa.
  • a correspondence relationship between each of the compressors and each of the heat exchange units is desirably determined in such a manner that the sum of the differential pressures of the multilayer heat exchanger 2 a becomes minimum.
  • the first heat exchange unit U 1 is in one-to-one correspondence with the first compressor C 1 .
  • the first heat exchange unit may correspond to any of the second to fourth compressors C 2 to C 4 other than the first compressor C 1 .
  • the hydrogen gas passes through the first compressor C 1 , the second heat exchange unit U 2 , the second compressor C 2 , the fourth heat exchange unit U 4 , the third compressor C 3 , the first heat exchange unit U 1 , the fourth compressor C 4 , and the third heat exchange unit U 3 in this order, and is supplied to and charged in the charge port of the tank or the cylinder.
  • a configuration of a multilayer heat exchanger 2 b formed by stacking the six heat exchange units U 1 to U 6 is different from the configuration of the multilayer heat exchanger 2 a according to the first embodiment.
  • the configuration will be described in detail below.
  • the multilayer heat exchanger 2 b according to the present embodiment is different from the multilayer heat exchanger 2 a according to the first embodiment in terms that a configuration of a cooling plate CP 2 is different from the cooling plate CP 1 of the multilayer heat exchanger 2 a according to the first embodiment, and the fifth heat exchange unit U 5 and the sixth heat exchange unit U 6 are added.
  • the configurations of the first to fourth flow passage plates P 1 to P 4 and the upper and lower end plates 3 and 4 are the same as the first embodiment.
  • FIG. 7 shows the configuration of the cooling plate CP 2 used for the multilayer heat exchanger 2 b according to the present embodiment.
  • the cooling plate CP 2 shown in FIG. 7 is a plate in which a cooling water hole IN for flow passages is opened on the side of one long side along the longitudinal direction of the cooling plate CP 2 , and a cooling water hole OUT for the flow passages is opened on the side of the other long side.
  • the cooling water hole IN and the cooling water hole OUT are formed at positions substantially along the diagonal direction of the cooling plate CP 2 .
  • the plurality of flow passages is formed in the cooling plate CP 2 so as to meander in the width direction of the cooling plate CP 2 and connect the cooling water hole IN and the cooling water hole OUT.
  • the cooling plate CP 2 has through holes capable of corresponding to fluid supply holes 1 IN to 4 IN, fluid discharge holes 1 OUT to 4 OUT, fluid supply holes 5 IN and 6 IN described later, and fluid discharge holes 5 OUT and 6 OUT on the both end sides in the longitudinal direction.
  • the first heat exchange unit U 1 is formed by stacking the first flow passage plates P 1 and the second heat exchange unit U 2 is formed by stacking the second flow passage plates P 2 . Further, the third heat exchange unit U 3 is formed by stacking the third flow passage plates P 3 and the fourth heat exchange unit U 4 is formed by stacking the fourth flow passage plates P 4 .
  • a fifth flow passage plate P 5 and a sixth flow passage plate P 6 have the substantially same configuration as the cooling plate CP 1 according to the first embodiment.
  • the cooling water hole OUT in the cooling plate CP 1 according to the first embodiment acts as the hole 5 IN in the fifth flow passage plate P 5
  • the cooling water hole IN acts as the hole 5 OUT.
  • the sixth flow passage plate P 6 is provided with the fluid supply hole 6 IN and the fluid discharge hole 6 OUT.
  • through holes 6 IN and 6 OUT are formed at positions corresponding to the holes 6 IN and 6 OUT of the sixth flow passage plate P 6
  • through holes 5 IN and 5 OUT are formed at positions corresponding to the holes 5 IN and 5 OUT of the fifth flow passage plate P 5 .
  • the fifth heat exchange unit U 5 is formed by using the cooling plates CP 2 and the fifth flow passage plates P 5
  • the sixth heat exchange unit U 6 is formed by using the cooling plates CP 2 and the sixth flow passage plates P 6 .
  • the heat exchange units U 1 to U 6 obtained as above are stacked in order of the first heat exchange unit U 1 , the third heat exchange unit U 3 , the sixth heat exchange unit U 6 , the fourth heat exchange unit U 4 , the fifth heat exchange unit U 5 , and the second heat exchange unit U 2 from the upper side. Further, the upper end plate 3 is placed on the upper surface of the first heat exchange unit U 1 , the lower end plate 4 is placed on the lower surface of the second heat exchange unit U 2 , and the heat exchange units U 1 to U 6 and the upper and lower end plates 3 and 4 are bonded to each other by diffusion-bonding.
  • the multilayer heat exchanger 2 b is formed.
  • the fluid supply hole 1 IN, the fluid discharge hole 1 OUT, the fluid supply hole 3 IN, the fluid discharge hole 3 OUT, and the holes 6 IN and 6 OUT are opened as well as the first flow passage plate P 1 .
  • the fluid supply hole 2 IN, the fluid discharge hole 2 OUT, the fluid supply hole 4 IN, the fluid discharge hole 4 OUT, and the holes 5 IN and 5 OUT are opened.
  • the cooling water hole IN and the cooling water hole OUT of the cooling plates CP 2 are opened along the vertical height direction of the multilayer heat exchanger 2 b on the sides of the multilayer heat exchanger 2 b .
  • Headers 5 for forming the common flow passages for the cooling water hole IN and the cooling water hole OUT along the vertical height direction of the multilayer heat exchanger 2 b are attached to the cooling water hole IN and the cooling water hole OUT. Therefore, the cooling water supplied to the header 5 on the side of the cooling water hole IN flows into the flow passages from the cooling water hole IN of each of the stacked cooling water plates CP 2 .
  • the cooling water flowing out from the cooling water hole IN of each of the cooling plates CP 2 is discharged through the header 5 on the side of the cooling water hole IN.
  • the fluid supply hole (supply hole) through which the fluid is supplied to each of the heat exchange units and the fluid discharge hole (discharge hole) through which the supplied fluid is discharged are also provided in each of the plurality of heat exchange units U 1 to U 6 of the multilayer heat exchanger 2 b . It can be said that the supply holes and the discharge holes provided in the heat exchange units are formed with length to directly communicate with the exterior along the stacking direction of the heat exchange units U 1 to U 6 in such a manner that arrangement positions thereof in a plan view seen from the upper end plate 3 and the lower end plate 4 are not overlapped with each other.
  • the hydrogen gas is compressed in six steps with using the above multilayer heat exchanger 2 b and the six compressors C 1 to C 6 .
  • the first heat exchange unit U 1 corresponds to the first compressor C 1
  • the second heat exchange unit U 2 corresponds to the second compressor C 2
  • the fifth heat exchange unit U 5 corresponds to the fifth compressor C 5
  • the sixth heat exchange unit U 6 corresponds to the sixth compressor C 6 in order, so as to form the six-step heat exchange system 1 b in which the six compressors C 1 to C 6 are connected in series via the multilayer heat exchanger 2 b.
  • the hydrogen gas passes through the heat exchange system 1 b as any of hydrogen gas flows ( 1 ) to ( 6 ), the hydrogen gas is pressurized at targeted pressure by receiving compression in six steps.
  • the heat exchange system 1 b is preferably formed in such a manner that the sum of differential pressures of the heat exchange units adjacent to each other is minimum.
  • the four-step compression in which the four compressors C 1 to C 4 and the four heat exchange units U 1 to U 4 are connected in series is described in the first embodiment, a configuration that two of a two-step compression in which two compressors and two heat exchange units are connected in series are placed in parallel can also be adopted. Needless to say, a configuration that a one-step compression and a three-step compression are placed in parallel can also be adopted.
  • the hydrogen gas is shown as an example of the fluid of the heat exchange systems 1 a and 1 b .
  • the fluid is not limited to the hydrogen gas but other gases or liquids can be adopted.
  • a cooling medium supplied to the cooling plates CP 1 and CP 2 can be appropriately changed in accordance with a type of the supplied fluid. Since the present invention is also the heat exchange system, the fluid may be heated by making a heating medium flow and using the cooling plate as a heating plate.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Pressure Welding/Diffusion-Bonding (AREA)
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CN103225974B (zh) 2015-12-23
EP2623910B1 (de) 2020-09-02
EP2623910A3 (de) 2018-04-11
JP5943619B2 (ja) 2016-07-05
EP2623910A2 (de) 2013-08-07
JP2013155971A (ja) 2013-08-15
KR20130088803A (ko) 2013-08-08

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