EP2853850A1 - Compression apparatus - Google Patents
Compression apparatus Download PDFInfo
- Publication number
- EP2853850A1 EP2853850A1 EP14177378.8A EP14177378A EP2853850A1 EP 2853850 A1 EP2853850 A1 EP 2853850A1 EP 14177378 A EP14177378 A EP 14177378A EP 2853850 A1 EP2853850 A1 EP 2853850A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cylinder
- gas
- passage
- section
- cooling
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000006835 compression Effects 0.000 title claims abstract description 75
- 238000007906 compression Methods 0.000 title claims abstract description 75
- 238000001816 cooling Methods 0.000 claims abstract description 51
- 238000009792 diffusion process Methods 0.000 claims abstract description 16
- 239000007790 solid phase Substances 0.000 claims description 20
- 239000012809 cooling fluid Substances 0.000 claims description 5
- 239000007789 gas Substances 0.000 description 100
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 45
- 239000000498 cooling water Substances 0.000 description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 14
- 238000011084 recovery Methods 0.000 description 9
- 238000005192 partition Methods 0.000 description 8
- 239000001257 hydrogen Substances 0.000 description 4
- 229910052739 hydrogen Inorganic materials 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 229910001220 stainless steel Inorganic materials 0.000 description 3
- 239000010935 stainless steel Substances 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 239000001307 helium Substances 0.000 description 1
- 229910052734 helium Inorganic materials 0.000 description 1
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
-
- 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
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
- F04B39/06—Cooling; Heating; Prevention of freezing
- F04B39/064—Cooling by a cooling jacket in the pump casing
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B37/00—Pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B25/00 - F04B35/00
- F04B37/10—Pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B25/00 - F04B35/00 for special use
- F04B37/12—Pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B25/00 - F04B35/00 for special use to obtain high pressure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
- F04B39/06—Cooling; Heating; Prevention of freezing
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
- F04B39/12—Casings; Cylinders; Cylinder heads; Fluid connections
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B43/00—Machines, pumps, or pumping installations having flexible working members
- F04B43/12—Machines, pumps, or pumping installations having flexible working members having peristaltic action
- F04B43/14—Machines, pumps, or pumping installations having flexible working members having peristaltic action having plate-like flexible members
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B5/00—Machines or pumps with differential-surface pistons
-
- 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
-
- 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
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
- F28D2021/0019—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for
- F28D2021/0047—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for for hydrogen or other compressed gas storage tanks
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F2275/00—Fastening; Joining
- F28F2275/06—Fastening; Joining by welding
- F28F2275/061—Fastening; Joining by welding by diffusion bonding
Definitions
- the present invention relates to compression apparatuses for compressing a gas.
- a compression apparatus for supplying hydrogen gas in a compressed state is used to efficiently charge fuel-cell vehicles with hydrogen gas.
- the compression apparatus includes a compressor for compressing hydrogen gas, and a gas cooler for cooling hydrogen gas that is raised in temperature by being compressed by the compressor.
- a plate-type heat exchanger as described, for example, in JP 2000-283668 A has been proposed.
- a plate-type heat exchanger includes a laminated body in which a large number of plates are stacked in layers. Between the stacked plates, flow channels for circulating fluids are individually formed. In the heat exchanger, heat exchange is performed between fluids flowing through their respective flow channels that are adjacent to each other in the plate stacking direction.
- the above-described compression apparatus requires a large number of pipes to connect the compressor and the gas cooler, and thus requires the securement of a large installation space.
- the present invention has been made to solve the above problem, and its object is to reduce the size of compression apparatuses.
- a compression apparatus includes a compressor including a cylinder for compressing a gas, a heat exchanger for cooling the gas compressed in the cylinder, and a circulation passage for guiding the gas compressed in the cylinder into the heat exchanger, in which the heat exchanger is solid-phase bonded to the cylinder, the circulation passage extends through an area in which the heat exchanger and the cylinder face each other, and the area is surrounded by a surface at which the heat exchanger and the cylinder are solid-phase bonded.
- the heat exchanger is solid-phase bonded to the cylinder.
- the circulation passage extends through an area in which the heat exchanger and the cylinder face each other, and the area is surrounded by a surface at which the heat exchanger and the cylinder are solid-phase bonded. Therefore, installation space for piping to connect the cylinder and the heat exchanger can be omitted, and the compression apparatus can be reduced in size. Further, piping can be omitted, which also contributes to a reduction in the number of components. Moreover, since the heat exchanger and the cylinder are in close contact by solid-phase bonding, the possibility of gas leakage can be reduced when a high-pressure gas discharged from the compressor flows through the circulation passage.
- the solid-phase bonding may be diffusion bonding.
- leakage of a high-pressure gas discharged from the compressor can be reduced more securely.
- the circulation passage may extend through a flat surface at which the heat exchanger and the cylinder are solid-phase bonded.
- one surface of the cylinder facing the heat exchanger and one surface of the heat exchanger facing the cylinder contact each other on the entire surfaces. These surfaces facing each other are solid-phase bonded. This allows the surfaces to be bonded to be pressurized evenly during solid-phase bonding. Thus, the possibility of gas leakage can be reduced more securely.
- the heat exchanger may have a structure in which a plurality of plates are stacked in layers so that cooling flow channels through which a cooling fluid for cooling the gas flows and gas flow channels through which the gas flows are formed alternately.
- a plate of the plurality of plates disposed at the end on the cylinder side may be solid-phase bonded to the cylinder.
- good efficiency of cooling the gas by the cooling fluid can be achieved.
- the heat exchanger can be easily mounted to the compressor.
- the plates adjacent to each other may be solid-phase bonded.
- the adjacent plates since the adjacent plates are solid-phase bonded, the possibility of leakage of a gas or a cooling fluid from between the plates can be reduced.
- compression apparatuses can be reduced in size.
- a compression apparatus is a compression apparatus used, for example, in a hydrogen station for supplying hydrogen to fuel-cell vehicles.
- the compression apparatus includes a compressor 2 for compressing hydrogen gas, and a gas cooler 4 for cooling hydrogen gas after being compressed by the compressor 2.
- the gas cooler 4 is a microchannel heat exchanger.
- the compressor 2 is a reciprocating compressor, and includes a compression section 16 including a cylinder 5 and a piston 7, and a drive mechanism for driving the piston 7.
- the drive mechanism includes a crankcase 6, a crankshaft 8, a drive section not shown, a cross guide 10, a crosshead 12, and a connecting rod 14.
- crankshaft 8 is provided rotatably around a horizontal axis.
- the drive section not shown is connected to the crankshaft 8, and transmits power to the crankshaft 8 to rotate the crankshaft 8.
- the cross guide 10 is a tubular member continuously provided to the crankcase 6.
- the crosshead 12 is housed reciprocatably in an axial direction of the cross guide 10.
- the connecting rod 14 connects the crankshaft 8 and the crosshead 12, and converts the rotary motion of the crankshaft 8 into a linear reciprocating motion for transmission to the crosshead 12.
- the compression section 16 is constituted by a multistage compression mechanism, and includes a first compression section 61 for performing first-stage compression of hydrogen gas, and a second compression section 62 for performing second-stage compression of hydrogen gas.
- the cylinder 5 has a first cylinder section 63 included in the first compression section 61 and a second cylinder section 66 included in the second compression section 62.
- the piston 7 has a first piston 64 included in the first compression section 61 and a second piston 67 included in the second compression section 62.
- the first cylinder section 63 is formed in a tubular shape. One end of the first cylinder section 63 is coupled to an axial end of the cross guide 10.
- the interior space of the first cylinder section 63 functions as a first cylinder chamber 63a.
- the first piston 64 is reciprocatably housed in the first cylinder chamber 63a.
- the first piston 64 is connected to the crosshead 12 by the piston rod 24.
- the first piston 64 moves with the crosshead 12 in an integrated manner.
- the second cylinder section 66 is formed integrally with the first cylinder section 63.
- the second cylinder section 66 is formed with a bottomed hole that communicates with the first cylinder chamber 63a and extends in an axial direction of the second cylinder section 66.
- An axial end of the hole is closed by an end wall 66c of the second cylinder section 66.
- the hole functions as a second cylinder chamber 66a.
- the second cylinder chamber 66a reciprocatably houses the second piston 67.
- the first cylinder chamber 63a and the second cylinder chamber 66a are spaces both in circular cross-sectional shapes.
- the second cylinder chamber 66a is smaller in diameter than the first cylinder chamber 63a, and is formed coaxially with the first cylinder chamber 63a.
- a space between the first piston 64 and a partition wall 25 on the piston rod 24 side functions as a first compression chamber 63b for compressing hydrogen gas.
- the second piston 67 is connected to an end of the first piston 64 opposite to an end to which the piston rod 24 is connected, and extends from the first piston 64 to the side opposite to the piston rod 24.
- the first piston 64 and the second piston 67 are formed both in cylindrical shapes.
- the second piston 67 is smaller in diameter than the first piston 64.
- a space between the second piston 67 and the end wall 66c of the second cylinder section 66 functions as a second compression chamber 66b in which hydrogen gas compressed in the first compression chamber 63b is further compressed. That is, a compression chamber 16a of the compression section 16 includes the first compression chamber 63b and the second compression chamber 66b.
- FIG. 2 is a cross-sectional view of the compression apparatus taken in the position of arrows II-II in FIG. 1 .
- the first cylinder section 63 includes a first inlet valve chamber 69a, a first inlet side communication passage 70a, a first inlet passage 71, a first delivery valve chamber 69b, a first delivery side communication passage 70b, and a first delivery passage 72.
- the first inlet valve chamber 69a and the first delivery valve chamber 69b are located on the opposite sides of the first compression chamber 63b.
- the first inlet valve chamber 69a and the first delivery valve chamber 69b individually extend in a direction perpendicular to the moving direction of the first and second pistons 64 and 67 in a horizontal plane.
- a first inlet valve 74a is housed and fixed by a first inlet valve fixing flange 75a.
- the first inlet side communication passage 70a is a passage for connecting the first compression chamber 63b and the first inlet valve chamber 69a.
- a first delivery valve 74b is housed and fixed by a first delivery valve fixing flange 75b.
- the first delivery side communication passage 70b is a passage for connecting the first compression chamber 63b and the first delivery valve chamber 69b.
- the first inlet passage 71 is disposed on the upper side of the first inlet valve chamber 69a, and extends downward from the upper surface of the first cylinder section 63 to be connected to the first inlet valve chamber 69a.
- a supply pipe 76 is connected to supply hydrogen gas from a supply source not shown therethrough.
- the first delivery passage 72 extends from the first delivery valve chamber 69b to the lower surface of the first cylinder section 63.
- the first delivery passage 72 has a first delivery passage opening 72a opening in the lower surface of the first cylinder section 63.
- FIG. 3 is a cross-sectional view of the compression apparatus taken in the position of arrows III-III in FIG. 1 .
- the lower surface of the second cylinder section 66 and the lower surface of the first cylinder section 63 are formed flush in a planar shape. That is, in the compressor 2, an area opposite to the gas cooler 4 is formed by a flat surface.
- the second cylinder section 66 includes a second inlet valve chamber 78a, a second inlet side communication passage 79a, a second inlet passage 80, a second delivery valve chamber 78b, a second delivery side communication passage 79b, and a second delivery passage 81.
- the second inlet valve chamber 78a and the second delivery valve chamber 78b are located on the opposite sides of the second compression chamber 66b.
- the second inlet valve chamber 78a and the second delivery valve chamber 78b individually extend in a direction perpendicular to the moving direction in a horizontal plane.
- a second inlet valve 83a is housed and fixed by a second inlet valve fixing flange 84a.
- the second inlet side communication passage 79a is a passage for connecting the second compression chamber 66b and the second inlet valve chamber 78a.
- a second delivery valve 83b is housed and fixed by a second delivery valve fixing flange 84b.
- the second delivery side communication passage 79b is a passage for connecting the second compression chamber 66b and the second delivery valve chamber 78b.
- the second inlet passage 80 is disposed on the lower side of the second inlet valve chamber 78a, and extends upward from the lower surface of the second cylinder section 66 to be connected to the second inlet valve chamber 78a.
- the second inlet passage 80 has a second inlet passage opening 80a opening in the lower surface of the second cylinder section 66.
- the second delivery passage 81 is disposed on the upper side of the second delivery valve chamber 78b, and extends downward from the upper surface of the second cylinder section 66. To the upper end of the second delivery passage 81, a communicating pipe 85 is connected.
- the gas cooler 4 is a heat exchanger for cooling hydrogen gas compressed in the compressor 2 by water as a cooling fluid, and includes a main body 38, a supply header 42 (see FIG. 3 ), and a recovery header 44 (see FIG. 3 ).
- the main body 38 is a laminated body in which gas plates 46 and water plates 48 are stacked in layers between a pair of end plates 50 and 50.
- a partition plate 88 is interposed in a middle position of the main body 38.
- the main body 38 is divided into two parts by the partition plate 88.
- the main body 38 includes a first cooling section 86 that is a heat exchanger for cooling hydrogen gas after first-stage compression, and a second cooling section 87 that is a heat exchanger for cooling hydrogen gas after second-stage compression.
- the interior of the main body 38 is partitioned into the first cooling section 86 and the second cooling section 87 by the partition plate 88.
- the first cooling section 86 is disposed on the compressor 2 side with respect to the partition plate 88, and the second cooling section 87 is disposed opposite to the compressor 2 with respect to the partition plate 88.
- the first cooling section 86 and the second cooling section 87 each include the gas plates 46 and the water plates 48.
- the gas plates 46 and the water plates 48 are disposed alternately.
- each gas plate 46 is a rectangular plate formed from stainless steel.
- Each gas plate 46 has an inflow passage through hole 46d and a discharge passage through hole 46e. Further, a plurality of gas channel grooves 46a, a distribution section groove 46b, and a recovery section groove 46c are formed in one surface of each gas plate 46.
- the distribution section groove 46b is connected to the inflow passage through hole 46d, and the recovery section groove 46c is connected to the discharge passage through hole 46e.
- each water plate 48 is a rectangular plate formed from stainless steel.
- Each water plate 48 has an inflow passage through hole 48b and a discharge passage through hole 48c.
- a plurality of water channel grooves 48a is formed in one plate surface of each water plate 48.
- the end plates 50 are each a rectangular plate formed from stainless steel.
- the end plate 50 on the first cooling section 86 side is diffusion bonded to the lower surface of the cylinder 5 (the first cylinder section 63 and the second cylinder section 66) of the compressor 2, and is in close contact with the lower surface.
- the cylinder 5 and the end plate 50 are pressurized under a temperature condition lower than or equal to the melting points of their base materials to an extent that it causes minimum plastic deformation, and bonded utilizing the diffusion of atoms occurring between the bonded surfaces.
- the upper surface of the end plate 50 is a flat surface and constitutes an area opposite to the cylinder 5 of the compressor 2.
- An inflow passage through hole 50b and a discharge passage through hole 50d are formed in the end plate 50 (see FIGS. 2 and 3 ). Hydrogen gas discharged from the compressor 2 and introduced into the gas cooler 4 passes through the inflow passage through hole 50b. Hydrogen gas discharged from the gas cooler 4 passes through the discharge passage through hole 50d.
- the gas plates 46 in the first cooling section 86 are disposed opposite in orientation to those in the second cooling section 87, and also the end plates 50a and the water plates 48 are disposed opposite in orientation likewise. That is, the positional relationship between the distribution section grooves 46b and the recovery section grooves 46c of the gas plates 46 in the first cooling section 86 is opposite to that in the second cooling section 87, and also the positional relationship between the inflow passage through holes 46d and the discharge passage through holes 46e in the first cooling section 86 is opposite to that in the second cooling section 87.
- the positional relationship between the inflow passage through holes 48b and 50b and the discharge passage through holes 48c and 50d in the first cooling section 86 is opposite to that in the second cooling section 87.
- Adjacent plates of the gas plates 46, the water plates 48, the end plates 50, and the partition plate 88 are bonded to each other by diffusion bonding.
- the inflow passage through holes 46d, 48b, and 50b of the respective plates communicate with each other, thereby forming a first gas inflow passage 52a extending in the plate stacking direction.
- An opening 52c on the inflow side of the first gas inflow passage 52a communicates with the first delivery passage opening 72a of the first delivery passage 72.
- hydrogen gas compressed in the first compression section 61 and flowing through the first delivery side communication passage 70b and the first delivery passage 72 flows into the first gas inflow passage 52a.
- the hydrogen gas flowing through the first gas inflow passage 52a is introduced into the gas flow channels 54 in the first cooling section 86. Accordingly, hydrogen gas is allowed to flow from the compressor 2 into the gas cooler 4 without flowing through any pipe.
- the discharge passage through holes 46e, 48c, and 50d communicate with each other, thereby forming a first gas discharge passage 53a extending in the plate stacking direction.
- An opening 53c on the discharge side of the first gas discharge passage 53a communicates with the second inlet passage opening 80a of the second inlet passage 80.
- the inflow passage through holes 46d, 48b, and 50b of the respective plates communicate with each other, thereby forming a second gas inflow passage 52b extending in the plate stacking direction.
- the second gas inflow passage 52b guides hydrogen gas compressed in the second compression section 62 and introduced into the second cooling section 87 through the communicating pipe 85 into the gas flow channels 54 in the second cooling section 87.
- the discharge passage through holes 46e, 48c, and 50d communicate with each other, thereby forming a second gas discharge passage 53b extending in the plate stacking direction.
- the second gas discharge passage 53b discharges hydrogen gas cooled by cooling water in the second cooling section 87 to a discharge pipe 89.
- the supply header 42 to which a cooling water supply pipe 58 is connected is attached, and to the other side, the recovery header 44 to which a cooling water recovery pipe 59 is connected is attached.
- cooling water flows from the cooling water supply pipe 58 through the supply header 42, the cooling water channels 57 (see FIG. 5 ), and the recovery header 44 to the cooling water recovery pipe 59.
- hydrogen gas is taken in from the first inlet passage 71 into the first compression chamber 63b via the first inlet valve 74a (see FIG. 2 ).
- the hydrogen gas is compressed by the first piston 64 and discharged from the first cylinder section 63 through the first delivery side communication passage 70b and the first delivery passage 72.
- the hydrogen gas flows into the first cooling section 86 of the gas cooler 4 through the first delivery passage opening 72a. That is, the first delivery side communication passage 70b and the first delivery passage 72 function as a circulation passage 77 for guiding hydrogen gas compressed in the cylinder 5 to the heat exchanger.
- the hydrogen gas flows from the first gas inflow passage 52a into the gas flow channels 54 ( FIG. 4 ), and is cooled by exchanging heat with cooling water flowing through the cooling water flow channels 57 ( FIG. 5 ).
- the cooled hydrogen gas is discharged from the first cooling section 86 to the second compression chamber 66b via the first gas discharge passage 53a.
- the hydrogen gas is further compressed by the second piston 67.
- the hydrogen gas compressed in the second compression chamber 66b is discharged through the second delivery passage 81 to the communicating pipe 85.
- the hydrogen gas discharged to the communicating pipe 85 flows into the second gas inflow passage 52b of the second cooling section 87.
- the hydrogen gas flows into the second gas discharge passage 53b and is discharged to the discharge pipe 89.
- the gas cooler 4 since the gas cooler 4 is directly fixed to the compressor 2, piping between the compressor 2 and the gas cooler 4 can be omitted. As a result, space for piping installation becomes unnecessary, and thus the compression apparatus can be reduced in size. Further, the number of pipes can be reduced, which also contributes to a reduction in the number of components. Moreover, since the gas cooler 4 and the cylinder 5 are in close contact by diffusion bonding, without the provision of a sealing member for sealing against hydrogen gas, the possibility of gas leakage can be reduced when a high-pressure gas discharged from the compressor 2 flows through the circulation passage.
- one surface of the cylinder 5 facing the gas cooler 4 (or the first cooling section 86) and one surface of the gas cooler 4 (or the first cooling section 86) facing the cylinder 5 contact each other on the entire surfaces. These surfaces facing each other are diffusion bonded. This allows the surfaces to be bonded to be pressurized evenly during diffusion bonding. Thus, the possibility of gas leakage can be reduced more securely.
- the gas cooler 4 since the gas cooler 4 consists of the plurality of plates 46 and 48 stacked in layers, good efficiency of cooling hydrogen gas by cooling water can be achieved. Further, the gas cooler 4 can be easily mounted to the compressor 2.
- plate-fin type heat exchangers such as plate-fin type heat exchangers may be used.
- a plate-fin heat exchanger is different from a microchannel heat exchanger in the manner in which a groove shape is machined and the manner in which stacked layers are bonded to each other, but has a structure functionally similar to that of the microchannel heat exchanger.
- a tube-type heat exchanger may also be used as the heat exchanger.
- the compressor 2 is configured to include the compression section 16 composed of the plurality of compression sections 61 and 62, which is not limiting.
- the compressor 2 may be configured to include a single-stage compression-type compression section 16, or may include a compression section with three or more stages (not shown).
- a compression apparatus including the single compression section 16 as shown in FIG. 6 the interior of a cylinder 5 is divided into two spaces by a piston 7. The space opposite to a piston rod 24 functions as a compression chamber 16a.
- a delivery passage 18 communicating with the compression chamber 16a is provided at the cylinder 5.
- An opening 18a of the delivery passage 18 is formed in the lower surface of the cylinder 5.
- the delivery passage 18 communicates with gas flow channels 54 of a gas cooler 4.
- the gas cooler 4 is not configured to be divided into a first cooling section 86 and a second cooling section 87, and thus a partition plate 88 is not provided.
- hydrogen gas introduced from the delivery passage 18 into the gas flow channels 54 is cooled by cooling water in the gas flow channels 54, and then discharged from a discharge pipe 89 of the gas cooler 4.
- a compression apparatus in which a cross guide 10 and a cylinder 5 are coupled in a vertical direction so that the moving direction of a piston 7 is a vertical direction, and a gas cooler 4 is mounted to a side of the cylinder 5.
- the gas flow channels 54 may alternatively be formed in a meandering shape on the plate surface of each gas plate 46.
- the cooling water flow channels 57 may alternatively be formed in a meandering shape on the plate surface of the each water plate 48. This configuration can increase the surface areas of the gas flow channels 54 and the cooling water flow channels 57, allowing for more effective cooling of hydrogen gas.
- the compression apparatus in the above-described embodiments may be used for a gas lighter than air such as helium gas or natural gas other than hydrogen gas, and may be used for compression of a gas such as carbon dioxide.
- the upper surface of the gas cooler 4 and the lower surface of the cylinder 5 of the compressor 2 are individually formed flat, and are configured to be solid-phase bonded over the entire surfaces.
- the lower surface of a cylinder 5 may be configured such that it partially has an area that is not flat, and at a recessed area 5a, the lower surface of the cylinder 5 is not in close contact with the upper surface of a gas cooler 4. That is, the cylinder 5 may be configured such that an area in which a first delivery passage 72 opens and an area in which a gas inflow passage 52a opens in the gas cooler 4 are not diffusion bonded.
- an area surrounding an opening 72a of the first delivery passage 72 needs to be diffusion bonded to the gas cooler 4 at the lower surface of the cylinder 5.
- the above-described embodiments have a structure in which the gas cooler 4 and the cylinder 5 are diffusion bonded, which is not limiting.
- another solid-phase bonding such as explosive welding may be used.
- a compression apparatus in the present invention includes a compressor including a cylinder for compressing a gas, a gas cooler for cooling the gas compressed in the cylinder, and a circulation passage for guiding the gas compressed in the cylinder into the gas cooler.
- the gas cooler is diffusion bonded to the cylinder.
- the circulation passage extends through an area in which the gas cooler and the cylinder face each other. At least areas surrounding the area are diffusion bonded.
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Abstract
Description
- The present invention relates to compression apparatuses for compressing a gas.
- In recent years, hydrogen stations for supplying hydrogen gas to fuel-cell vehicles have been proposed. In hydrogen stations, a compression apparatus for supplying hydrogen gas in a compressed state is used to efficiently charge fuel-cell vehicles with hydrogen gas. The compression apparatus includes a compressor for compressing hydrogen gas, and a gas cooler for cooling hydrogen gas that is raised in temperature by being compressed by the compressor. For the gas cooler, use of a plate-type heat exchanger as described, for example, in
JP 2000-283668 A - A plate-type heat exchanger includes a laminated body in which a large number of plates are stacked in layers. Between the stacked plates, flow channels for circulating fluids are individually formed. In the heat exchanger, heat exchange is performed between fluids flowing through their respective flow channels that are adjacent to each other in the plate stacking direction.
- The above-described compression apparatus requires a large number of pipes to connect the compressor and the gas cooler, and thus requires the securement of a large installation space.
- The present invention has been made to solve the above problem, and its object is to reduce the size of compression apparatuses.
- In order to achieve the above object, a compression apparatus according to the present invention includes a compressor including a cylinder for compressing a gas, a heat exchanger for cooling the gas compressed in the cylinder, and a circulation passage for guiding the gas compressed in the cylinder into the heat exchanger, in which the heat exchanger is solid-phase bonded to the cylinder, the circulation passage extends through an area in which the heat exchanger and the cylinder face each other, and the area is surrounded by a surface at which the heat exchanger and the cylinder are solid-phase bonded.
- In the present invention, the heat exchanger is solid-phase bonded to the cylinder. The circulation passage extends through an area in which the heat exchanger and the cylinder face each other, and the area is surrounded by a surface at which the heat exchanger and the cylinder are solid-phase bonded. Therefore, installation space for piping to connect the cylinder and the heat exchanger can be omitted, and the compression apparatus can be reduced in size. Further, piping can be omitted, which also contributes to a reduction in the number of components. Moreover, since the heat exchanger and the cylinder are in close contact by solid-phase bonding, the possibility of gas leakage can be reduced when a high-pressure gas discharged from the compressor flows through the circulation passage.
- Here, the solid-phase bonding may be diffusion bonding. In this aspect, leakage of a high-pressure gas discharged from the compressor can be reduced more securely.
- The circulation passage may extend through a flat surface at which the heat exchanger and the cylinder are solid-phase bonded. In this aspect, one surface of the cylinder facing the heat exchanger and one surface of the heat exchanger facing the cylinder contact each other on the entire surfaces. These surfaces facing each other are solid-phase bonded. This allows the surfaces to be bonded to be pressurized evenly during solid-phase bonding. Thus, the possibility of gas leakage can be reduced more securely.
- The heat exchanger may have a structure in which a plurality of plates are stacked in layers so that cooling flow channels through which a cooling fluid for cooling the gas flows and gas flow channels through which the gas flows are formed alternately. In this case, a plate of the plurality of plates disposed at the end on the cylinder side may be solid-phase bonded to the cylinder. In this aspect, good efficiency of cooling the gas by the cooling fluid can be achieved. Further, the heat exchanger can be easily mounted to the compressor.
- In this aspect, the plates adjacent to each other may be solid-phase bonded. In this aspect, since the adjacent plates are solid-phase bonded, the possibility of leakage of a gas or a cooling fluid from between the plates can be reduced.
- According to the present invention, compression apparatuses can be reduced in size.
-
-
FIG. 1 is a schematic diagram illustrating a configuration of a compression apparatus (with a recovery header removed) according to an embodiment of the present invention. -
FIG. 2 is a cross-sectional view of the compression apparatus taken in the position of arrows II-II inFIG. 1 . -
FIG. 3 is a cross-sectional view of the compression apparatus taken in the position of arrows III-III inFIG. 1 . -
FIG. 4 is a plan view of a hydrogen gas plate constituting a part of a gas cooler provided in the compression apparatus. -
FIG. 5 is a plan view of a cooling water plate constituting a part of the gas cooler. -
FIG. 6 is a diagram corresponding toFIG. 1 in another embodiment of the present invention. -
FIG. 7 is a diagram corresponding toFIG. 2 in another embodiment of the present invention. - Hereinafter, embodiments of the present invention will be described with reference to the drawings.
- A compression apparatus according to an embodiment of the present invention is a compression apparatus used, for example, in a hydrogen station for supplying hydrogen to fuel-cell vehicles.
- As shown in
FIGS. 1 to 3 , the compression apparatus according to this embodiment includes acompressor 2 for compressing hydrogen gas, and agas cooler 4 for cooling hydrogen gas after being compressed by thecompressor 2. Thegas cooler 4 is a microchannel heat exchanger. - The
compressor 2 is a reciprocating compressor, and includes acompression section 16 including acylinder 5 and apiston 7, and a drive mechanism for driving thepiston 7. The drive mechanism includes acrankcase 6, acrankshaft 8, a drive section not shown, across guide 10, acrosshead 12, and aconnecting rod 14. - In the
crankcase 6, thecrankshaft 8 is provided rotatably around a horizontal axis. The drive section not shown is connected to thecrankshaft 8, and transmits power to thecrankshaft 8 to rotate thecrankshaft 8. - The
cross guide 10 is a tubular member continuously provided to thecrankcase 6. In thecross guide 10, thecrosshead 12 is housed reciprocatably in an axial direction of thecross guide 10. The connectingrod 14 connects thecrankshaft 8 and thecrosshead 12, and converts the rotary motion of thecrankshaft 8 into a linear reciprocating motion for transmission to thecrosshead 12. - The
compression section 16 is constituted by a multistage compression mechanism, and includes afirst compression section 61 for performing first-stage compression of hydrogen gas, and asecond compression section 62 for performing second-stage compression of hydrogen gas. Thecylinder 5 has afirst cylinder section 63 included in thefirst compression section 61 and asecond cylinder section 66 included in thesecond compression section 62. Thepiston 7 has afirst piston 64 included in thefirst compression section 61 and asecond piston 67 included in thesecond compression section 62. - The
first cylinder section 63 is formed in a tubular shape. One end of thefirst cylinder section 63 is coupled to an axial end of thecross guide 10. - The interior space of the
first cylinder section 63 functions as afirst cylinder chamber 63a. In thefirst cylinder chamber 63a, thefirst piston 64 is reciprocatably housed. Thefirst piston 64 is connected to thecrosshead 12 by thepiston rod 24. Thus, thefirst piston 64 moves with thecrosshead 12 in an integrated manner. - The
second cylinder section 66 is formed integrally with thefirst cylinder section 63. Thesecond cylinder section 66 is formed with a bottomed hole that communicates with thefirst cylinder chamber 63a and extends in an axial direction of thesecond cylinder section 66. An axial end of the hole is closed by anend wall 66c of thesecond cylinder section 66. The hole functions as asecond cylinder chamber 66a. Thesecond cylinder chamber 66a reciprocatably houses thesecond piston 67. - The
first cylinder chamber 63a and thesecond cylinder chamber 66a are spaces both in circular cross-sectional shapes. Thesecond cylinder chamber 66a is smaller in diameter than thefirst cylinder chamber 63a, and is formed coaxially with thefirst cylinder chamber 63a. In thefirst cylinder chamber 63a, a space between thefirst piston 64 and apartition wall 25 on thepiston rod 24 side functions as afirst compression chamber 63b for compressing hydrogen gas. - The
second piston 67 is connected to an end of thefirst piston 64 opposite to an end to which thepiston rod 24 is connected, and extends from thefirst piston 64 to the side opposite to thepiston rod 24. Thefirst piston 64 and thesecond piston 67 are formed both in cylindrical shapes. Thesecond piston 67 is smaller in diameter than thefirst piston 64. - In the
second cylinder chamber 66a, a space between thesecond piston 67 and theend wall 66c of thesecond cylinder section 66 functions as asecond compression chamber 66b in which hydrogen gas compressed in thefirst compression chamber 63b is further compressed. That is, acompression chamber 16a of thecompression section 16 includes thefirst compression chamber 63b and thesecond compression chamber 66b. -
FIG. 2 is a cross-sectional view of the compression apparatus taken in the position of arrows II-II inFIG. 1 . Thefirst cylinder section 63 includes a firstinlet valve chamber 69a, a first inletside communication passage 70a, afirst inlet passage 71, a firstdelivery valve chamber 69b, a first deliveryside communication passage 70b, and afirst delivery passage 72. - The first
inlet valve chamber 69a and the firstdelivery valve chamber 69b are located on the opposite sides of thefirst compression chamber 63b. The firstinlet valve chamber 69a and the firstdelivery valve chamber 69b individually extend in a direction perpendicular to the moving direction of the first andsecond pistons - In the first
inlet valve chamber 69a, afirst inlet valve 74a is housed and fixed by a first inletvalve fixing flange 75a. The first inletside communication passage 70a is a passage for connecting thefirst compression chamber 63b and the firstinlet valve chamber 69a. In the firstdelivery valve chamber 69b, afirst delivery valve 74b is housed and fixed by a first deliveryvalve fixing flange 75b. The first deliveryside communication passage 70b is a passage for connecting thefirst compression chamber 63b and the firstdelivery valve chamber 69b. - The
first inlet passage 71 is disposed on the upper side of the firstinlet valve chamber 69a, and extends downward from the upper surface of thefirst cylinder section 63 to be connected to the firstinlet valve chamber 69a. To the upper end of thefirst inlet passage 71, asupply pipe 76 is connected to supply hydrogen gas from a supply source not shown therethrough. - The
first delivery passage 72 extends from the firstdelivery valve chamber 69b to the lower surface of thefirst cylinder section 63. Thefirst delivery passage 72 has a firstdelivery passage opening 72a opening in the lower surface of thefirst cylinder section 63. -
FIG. 3 is a cross-sectional view of the compression apparatus taken in the position of arrows III-III inFIG. 1 . The lower surface of thesecond cylinder section 66 and the lower surface of thefirst cylinder section 63 are formed flush in a planar shape. That is, in thecompressor 2, an area opposite to thegas cooler 4 is formed by a flat surface. - The
second cylinder section 66 includes a secondinlet valve chamber 78a, a second inletside communication passage 79a, asecond inlet passage 80, a seconddelivery valve chamber 78b, a second deliveryside communication passage 79b, and asecond delivery passage 81. - The second
inlet valve chamber 78a and the seconddelivery valve chamber 78b are located on the opposite sides of thesecond compression chamber 66b. The secondinlet valve chamber 78a and the seconddelivery valve chamber 78b individually extend in a direction perpendicular to the moving direction in a horizontal plane. In the secondinlet valve chamber 78a, asecond inlet valve 83a is housed and fixed by a second inletvalve fixing flange 84a. The second inletside communication passage 79a is a passage for connecting thesecond compression chamber 66b and the secondinlet valve chamber 78a. In the seconddelivery valve chamber 78b, asecond delivery valve 83b is housed and fixed by a second deliveryvalve fixing flange 84b. The second deliveryside communication passage 79b is a passage for connecting thesecond compression chamber 66b and the seconddelivery valve chamber 78b. - The
second inlet passage 80 is disposed on the lower side of the secondinlet valve chamber 78a, and extends upward from the lower surface of thesecond cylinder section 66 to be connected to the secondinlet valve chamber 78a. Thesecond inlet passage 80 has a second inlet passage opening 80a opening in the lower surface of thesecond cylinder section 66. - The
second delivery passage 81 is disposed on the upper side of the seconddelivery valve chamber 78b, and extends downward from the upper surface of thesecond cylinder section 66. To the upper end of thesecond delivery passage 81, a communicatingpipe 85 is connected. - The
gas cooler 4 is a heat exchanger for cooling hydrogen gas compressed in thecompressor 2 by water as a cooling fluid, and includes amain body 38, a supply header 42 (seeFIG. 3 ), and a recovery header 44 (seeFIG. 3 ). - The
main body 38 is a laminated body in whichgas plates 46 andwater plates 48 are stacked in layers between a pair ofend plates partition plate 88 is interposed in a middle position of themain body 38. Themain body 38 is divided into two parts by thepartition plate 88. - Specifically, the
main body 38 includes afirst cooling section 86 that is a heat exchanger for cooling hydrogen gas after first-stage compression, and asecond cooling section 87 that is a heat exchanger for cooling hydrogen gas after second-stage compression. The interior of themain body 38 is partitioned into thefirst cooling section 86 and thesecond cooling section 87 by thepartition plate 88. - The
first cooling section 86 is disposed on thecompressor 2 side with respect to thepartition plate 88, and thesecond cooling section 87 is disposed opposite to thecompressor 2 with respect to thepartition plate 88. - The
first cooling section 86 and thesecond cooling section 87 each include thegas plates 46 and thewater plates 48. Thegas plates 46 and thewater plates 48 are disposed alternately. - As shown in
FIG. 4 , eachgas plate 46 is a rectangular plate formed from stainless steel. Eachgas plate 46 has an inflow passage throughhole 46d and a discharge passage throughhole 46e. Further, a plurality ofgas channel grooves 46a, adistribution section groove 46b, and arecovery section groove 46c are formed in one surface of eachgas plate 46. Thedistribution section groove 46b is connected to the inflow passage throughhole 46d, and therecovery section groove 46c is connected to the discharge passage throughhole 46e. When thegas plates 46 and thewater plates 48 are stacked on each other,gas flow channels 54 are formed by thegas channel grooves 46a and thewater plates 48. - As shown in
FIG. 5 , like thegas plates 46, eachwater plate 48 is a rectangular plate formed from stainless steel. Eachwater plate 48 has an inflow passage throughhole 48b and a discharge passage throughhole 48c. A plurality ofwater channel grooves 48a is formed in one plate surface of eachwater plate 48. When thewater plates 48 and thegas plates 46 are stacked on each other, coolingwater flow channels 57 are formed by thewater channel grooves 48a and thegas plates 46. - The
end plates 50 are each a rectangular plate formed from stainless steel. Theend plate 50 on thefirst cooling section 86 side is diffusion bonded to the lower surface of the cylinder 5 (thefirst cylinder section 63 and the second cylinder section 66) of thecompressor 2, and is in close contact with the lower surface. Specifically, being kept in close contact with each other, thecylinder 5 and theend plate 50 are pressurized under a temperature condition lower than or equal to the melting points of their base materials to an extent that it causes minimum plastic deformation, and bonded utilizing the diffusion of atoms occurring between the bonded surfaces. The upper surface of theend plate 50 is a flat surface and constitutes an area opposite to thecylinder 5 of thecompressor 2. - An inflow passage through
hole 50b and a discharge passage throughhole 50d are formed in the end plate 50 (seeFIGS. 2 and3 ). Hydrogen gas discharged from thecompressor 2 and introduced into thegas cooler 4 passes through the inflow passage throughhole 50b. Hydrogen gas discharged from thegas cooler 4 passes through the discharge passage throughhole 50d. - The
gas plates 46 in thefirst cooling section 86 are disposed opposite in orientation to those in thesecond cooling section 87, and also the end plates 50a and thewater plates 48 are disposed opposite in orientation likewise. That is, the positional relationship between thedistribution section grooves 46b and therecovery section grooves 46c of thegas plates 46 in thefirst cooling section 86 is opposite to that in thesecond cooling section 87, and also the positional relationship between the inflow passage throughholes 46d and the discharge passage throughholes 46e in thefirst cooling section 86 is opposite to that in thesecond cooling section 87. For the end plates 50a and thewater plates 48, the positional relationship between the inflow passage throughholes holes first cooling section 86 is opposite to that in thesecond cooling section 87. - Adjacent plates of the
gas plates 46, thewater plates 48, theend plates 50, and thepartition plate 88 are bonded to each other by diffusion bonding. - In the
first cooling section 86, the inflow passage throughholes gas inflow passage 52a extending in the plate stacking direction. Anopening 52c on the inflow side of the firstgas inflow passage 52a communicates with the firstdelivery passage opening 72a of thefirst delivery passage 72. Thus, hydrogen gas compressed in thefirst compression section 61 and flowing through the first deliveryside communication passage 70b and thefirst delivery passage 72 flows into the firstgas inflow passage 52a. The hydrogen gas flowing through the firstgas inflow passage 52a is introduced into thegas flow channels 54 in thefirst cooling section 86. Accordingly, hydrogen gas is allowed to flow from thecompressor 2 into thegas cooler 4 without flowing through any pipe. - In the
first cooling section 86, the discharge passage throughholes gas discharge passage 53a extending in the plate stacking direction. Anopening 53c on the discharge side of the firstgas discharge passage 53a communicates with the second inlet passage opening 80a of thesecond inlet passage 80. Thus, hydrogen gas cooled by cooling water in thefirst cooling section 86 passes through theopening 53c of the firstgas discharge passage 53a. The hydrogen gas is discharged to thesecond compression section 62. - In the
second cooling section 87, the inflow passage throughholes gas inflow passage 52b extending in the plate stacking direction. The secondgas inflow passage 52b guides hydrogen gas compressed in thesecond compression section 62 and introduced into thesecond cooling section 87 through the communicatingpipe 85 into thegas flow channels 54 in thesecond cooling section 87. - In the
second cooling section 87, the discharge passage throughholes gas discharge passage 53b extending in the plate stacking direction. The secondgas discharge passage 53b discharges hydrogen gas cooled by cooling water in thesecond cooling section 87 to adischarge pipe 89. - As shown in
FIG. 3 , to one side of the right and left sides of themain body 38, thesupply header 42 to which a coolingwater supply pipe 58 is connected is attached, and to the other side, therecovery header 44 to which a coolingwater recovery pipe 59 is connected is attached. In thegas cooler 4, cooling water flows from the coolingwater supply pipe 58 through thesupply header 42, the cooling water channels 57 (seeFIG. 5 ), and therecovery header 44 to the coolingwater recovery pipe 59. - When the compression apparatus is driven, hydrogen gas is taken in from the
first inlet passage 71 into thefirst compression chamber 63b via thefirst inlet valve 74a (seeFIG. 2 ). In thefirst compression chamber 63b, the hydrogen gas is compressed by thefirst piston 64 and discharged from thefirst cylinder section 63 through the first deliveryside communication passage 70b and thefirst delivery passage 72. The hydrogen gas flows into thefirst cooling section 86 of thegas cooler 4 through the firstdelivery passage opening 72a. That is, the first deliveryside communication passage 70b and thefirst delivery passage 72 function as acirculation passage 77 for guiding hydrogen gas compressed in thecylinder 5 to the heat exchanger. - In the
first cooling section 86, the hydrogen gas flows from the firstgas inflow passage 52a into the gas flow channels 54 (FIG. 4 ), and is cooled by exchanging heat with cooling water flowing through the cooling water flow channels 57 (FIG. 5 ). The cooled hydrogen gas is discharged from thefirst cooling section 86 to thesecond compression chamber 66b via the firstgas discharge passage 53a. In thesecond compression chamber 66b, the hydrogen gas is further compressed by thesecond piston 67. - The hydrogen gas compressed in the
second compression chamber 66b is discharged through thesecond delivery passage 81 to the communicatingpipe 85. The hydrogen gas discharged to the communicatingpipe 85 flows into the secondgas inflow passage 52b of thesecond cooling section 87. After cooled in thesecond cooling section 87, the hydrogen gas flows into the secondgas discharge passage 53b and is discharged to thedischarge pipe 89. - In the compression apparatus according to this embodiment, since the
gas cooler 4 is directly fixed to thecompressor 2, piping between thecompressor 2 and thegas cooler 4 can be omitted. As a result, space for piping installation becomes unnecessary, and thus the compression apparatus can be reduced in size. Further, the number of pipes can be reduced, which also contributes to a reduction in the number of components. Moreover, since thegas cooler 4 and thecylinder 5 are in close contact by diffusion bonding, without the provision of a sealing member for sealing against hydrogen gas, the possibility of gas leakage can be reduced when a high-pressure gas discharged from thecompressor 2 flows through the circulation passage. - In this embodiment, one surface of the
cylinder 5 facing the gas cooler 4 (or the first cooling section 86) and one surface of the gas cooler 4 (or the first cooling section 86) facing thecylinder 5 contact each other on the entire surfaces. These surfaces facing each other are diffusion bonded. This allows the surfaces to be bonded to be pressurized evenly during diffusion bonding. Thus, the possibility of gas leakage can be reduced more securely. - In this embodiment, since the
gas cooler 4 consists of the plurality ofplates gas cooler 4 can be easily mounted to thecompressor 2. - In this embodiment, in the
gas cooler 4, since theadjacent plates plates - It should be considered that the embodiment disclosed now is illustrative in all respects and is not limiting. The scope of the present invention is indicated not by the description of the above-described embodiment but by the scope of claims, and also includes all modifications within a meaning and scope equivalent to the scope of claims.
- For example, as the
gas cooler 4, other various plate-type heat exchangers such as plate-fin type heat exchangers may be used. A plate-fin heat exchanger is different from a microchannel heat exchanger in the manner in which a groove shape is machined and the manner in which stacked layers are bonded to each other, but has a structure functionally similar to that of the microchannel heat exchanger. A tube-type heat exchanger may also be used as the heat exchanger. - In the above-described embodiment, the
compressor 2 is configured to include thecompression section 16 composed of the plurality ofcompression sections FIG. 6 , for example, thecompressor 2 may be configured to include a single-stage compression-type compression section 16, or may include a compression section with three or more stages (not shown). In a compression apparatus including thesingle compression section 16 as shown inFIG. 6 , the interior of acylinder 5 is divided into two spaces by apiston 7. The space opposite to apiston rod 24 functions as acompression chamber 16a. Adelivery passage 18 communicating with thecompression chamber 16a is provided at thecylinder 5. Anopening 18a of thedelivery passage 18 is formed in the lower surface of thecylinder 5. Thedelivery passage 18 communicates withgas flow channels 54 of agas cooler 4. Thegas cooler 4 is not configured to be divided into afirst cooling section 86 and asecond cooling section 87, and thus apartition plate 88 is not provided. Thus, hydrogen gas introduced from thedelivery passage 18 into thegas flow channels 54 is cooled by cooling water in thegas flow channels 54, and then discharged from adischarge pipe 89 of thegas cooler 4. - Further, application may be made to a compression apparatus in which a
cross guide 10 and acylinder 5 are coupled in a vertical direction so that the moving direction of apiston 7 is a vertical direction, and agas cooler 4 is mounted to a side of thecylinder 5. - The
gas flow channels 54 may alternatively be formed in a meandering shape on the plate surface of eachgas plate 46. The coolingwater flow channels 57 may alternatively be formed in a meandering shape on the plate surface of the eachwater plate 48. This configuration can increase the surface areas of thegas flow channels 54 and the coolingwater flow channels 57, allowing for more effective cooling of hydrogen gas. The compression apparatus in the above-described embodiments may be used for a gas lighter than air such as helium gas or natural gas other than hydrogen gas, and may be used for compression of a gas such as carbon dioxide. - In the above-described embodiments, the upper surface of the
gas cooler 4 and the lower surface of thecylinder 5 of thecompressor 2 are individually formed flat, and are configured to be solid-phase bonded over the entire surfaces. However, this is not limiting. For example, as shown inFIG. 7 , the lower surface of acylinder 5 may be configured such that it partially has an area that is not flat, and at a recessedarea 5a, the lower surface of thecylinder 5 is not in close contact with the upper surface of agas cooler 4. That is, thecylinder 5 may be configured such that an area in which afirst delivery passage 72 opens and an area in which agas inflow passage 52a opens in thegas cooler 4 are not diffusion bonded. However, also in this case, an area surrounding anopening 72a of thefirst delivery passage 72 needs to be diffusion bonded to thegas cooler 4 at the lower surface of thecylinder 5. - The above-described embodiments have a structure in which the
gas cooler 4 and thecylinder 5 are diffusion bonded, which is not limiting. For bonding between thegas cooler 4 and thecylinder 5, another solid-phase bonding such as explosive welding may be used. - A compression apparatus in the present invention includes a compressor including a cylinder for compressing a gas, a gas cooler for cooling the gas compressed in the cylinder, and a circulation passage for guiding the gas compressed in the cylinder into the gas cooler. The gas cooler is diffusion bonded to the cylinder. In order to reduce the size of the compression apparatus, the circulation passage extends through an area in which the gas cooler and the cylinder face each other. At least areas surrounding the area are diffusion bonded.
Claims (5)
- A compression apparatus comprising:a compressor including a cylinder for compressing a gas;a heat exchanger for cooling the gas compressed in the cylinder; anda circulation passage for guiding the gas compressed in the cylinder into the heat exchanger, wherein:the heat exchanger is solid-phase bonded to the cylinder;the circulation passage extends through an area in which the heat exchanger and the cylinder face each other; andthe area is surrounded by a surface at which the heat exchanger and the cylinder are solid-phase bonded.
- The compression apparatus according to claim 1, wherein:the solid phase bonding is diffusion bonding.
- The compression apparatus according to claim 1, wherein:the circulation passage extends through a flat surface at which the heat exchanger and the cylinder are solid-phase bonded.
- The compression apparatus according to claim 1, wherein:the heat exchanger has a structure in which a plurality of plates are stacked in layers so that cooling flow channels through which a cooling fluid for cooling the gas flows and gas flow channels through which the gas flows are formed alternately; anda plate of the plurality of plates disposed at the end on the cylinder side is solid-phase bonded to the cylinder.
- The compression apparatus according to claim 4, wherein:the plates adjacent to each other are solid-phase bonded.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2013176278A JP2015045251A (en) | 2013-08-28 | 2013-08-28 | Compression device |
Publications (2)
Publication Number | Publication Date |
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EP2853850A1 true EP2853850A1 (en) | 2015-04-01 |
EP2853850B1 EP2853850B1 (en) | 2019-04-03 |
Family
ID=51212698
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP14177378.8A Not-in-force EP2853850B1 (en) | 2013-08-28 | 2014-07-17 | Compression apparatus |
Country Status (6)
Country | Link |
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US (1) | US20150059569A1 (en) |
EP (1) | EP2853850B1 (en) |
JP (1) | JP2015045251A (en) |
KR (1) | KR20150026867A (en) |
CN (1) | CN104421135A (en) |
BR (1) | BR102014021400A2 (en) |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0796996A1 (en) * | 1996-03-19 | 1997-09-24 | Atlas Copco Airpower N.V. | Compressor device |
US6077053A (en) * | 1997-04-10 | 2000-06-20 | Kabushiki Kaisha Kobe Seiko Sho | Piston type gas compressor |
JP2000283668A (en) | 1999-03-30 | 2000-10-13 | Ebara Corp | Plate type heat exchanger and solution heat exchanger using plate type heat exchanger |
US20090047144A1 (en) * | 2006-02-16 | 2009-02-19 | Gasfill Limited | Fluid Compressor and Motor Vehicle Refuelling Apparatus |
US20130192806A1 (en) * | 2012-01-31 | 2013-08-01 | Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) | Multilayer heat exchanger and heat exchange system |
JP2014152703A (en) * | 2013-02-08 | 2014-08-25 | Kobe Steel Ltd | Compression equipment |
EP2803857A1 (en) * | 2013-04-24 | 2014-11-19 | Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) | Compressing device |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3480201A (en) * | 1967-12-29 | 1969-11-25 | Worthington Corp | Package system for compressing gases |
US5632149A (en) * | 1994-11-28 | 1997-05-27 | Sanyo Electric Company, Ltd. | Heat exchanger for a gas compression/expansion apparatus and a method of manufacturing thereof |
JP4206799B2 (en) * | 2003-03-31 | 2009-01-14 | 株式会社豊田自動織機 | Compressor |
JP5522158B2 (en) * | 2011-02-08 | 2014-06-18 | 株式会社豊田自動織機 | Compressor |
-
2013
- 2013-08-28 JP JP2013176278A patent/JP2015045251A/en active Pending
-
2014
- 2014-07-17 EP EP14177378.8A patent/EP2853850B1/en not_active Not-in-force
- 2014-07-21 US US14/336,463 patent/US20150059569A1/en not_active Abandoned
- 2014-08-25 KR KR20140110520A patent/KR20150026867A/en not_active Application Discontinuation
- 2014-08-28 CN CN201410430042.9A patent/CN104421135A/en active Pending
- 2014-08-28 BR BR102014021400A patent/BR102014021400A2/en not_active Application Discontinuation
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0796996A1 (en) * | 1996-03-19 | 1997-09-24 | Atlas Copco Airpower N.V. | Compressor device |
US6077053A (en) * | 1997-04-10 | 2000-06-20 | Kabushiki Kaisha Kobe Seiko Sho | Piston type gas compressor |
JP2000283668A (en) | 1999-03-30 | 2000-10-13 | Ebara Corp | Plate type heat exchanger and solution heat exchanger using plate type heat exchanger |
US20090047144A1 (en) * | 2006-02-16 | 2009-02-19 | Gasfill Limited | Fluid Compressor and Motor Vehicle Refuelling Apparatus |
US20130192806A1 (en) * | 2012-01-31 | 2013-08-01 | Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) | Multilayer heat exchanger and heat exchange system |
JP2014152703A (en) * | 2013-02-08 | 2014-08-25 | Kobe Steel Ltd | Compression equipment |
EP2803857A1 (en) * | 2013-04-24 | 2014-11-19 | Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) | Compressing device |
Also Published As
Publication number | Publication date |
---|---|
BR102014021400A2 (en) | 2016-06-28 |
EP2853850B1 (en) | 2019-04-03 |
CN104421135A (en) | 2015-03-18 |
KR20150026867A (en) | 2015-03-11 |
JP2015045251A (en) | 2015-03-12 |
US20150059569A1 (en) | 2015-03-05 |
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