JP2013155971A - Laminated type heat exchanger and heat exchange system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a compact heat exchanger having a high pressure resistance and a heat exchange system.SOLUTION: In a laminated type heat exchanger 2a, a plurality of heat exchange units U1-U4 are laminated that exchange heat of fluids sent out from a plurality of compressors C1-C4. The heat exchange units U1-U4 have a structure in which a plurality of flow path plates P1-P4 and plates CP1 for cooling are laminated. A concave groove is formed as a flow path of a fluid on surfaces of the flow path plates P1-P4 and plates CP1 for cooling. The flow path plates P1-P4 and plates CP1 for cooling are made of metal and the flow path is formed by chemical etching. The laminated flow path plates P1 to P4 and plates CP1 for cooling made of metal are bonded with each other by diffusion. The heat exchange units U1-U4 are associated with compressors C1-C4 on one-to-one basis.

Description

  The present invention relates to a laminated heat exchanger formed by laminating flow path plates and a heat exchange system using the laminated heat exchanger.

  A system that changes a gas (gas) into a high-pressure gas or a liquefied gas by pressurization and compression and fills the tank, a cylinder, or the like is widely used in gas production plants, supply stations, and the like. In recent years, for example, the demand for hydrogen gas has continued to expand, and it is desired to develop a system for efficiently filling hydrogen gas in hydrogen gas production plants and supply stations.

  When filling a gas at a gas supply station or the like, the gas is compressed to a high pressure by a compressor to reduce its volume, and filled into a tank or a cylinder. However, since the gas generates heat when compressed to a high pressure, it must be cooled before filling with the compressed gas. Therefore, in a gas supply station or the like, the gas that has been compressed by the compressor and heated to the heat exchanger is led to a heat exchanger to be cooled, and the cooled high-pressure gas is filled in a tank or a cylinder.

The heat exchanger used at this time includes a heat exchanger called a fin type or a plate type, which is disclosed in Patent Document 1, for example.
The plate-type heat exchanger disclosed in Patent Document 1 is a plate-type heat exchanger having an integrated structure in which a partition is divided into a plurality of units by a partition wall. The plurality of divided units include at least one unit. The plurality of units have a plurality of fluid inlets or outlets, and at least one of the units connected to the inlets and outlets forms a plurality of different heating channels or heated channels. .

  Patent Document 1 states that this plate heat exchanger facilitates piping and enables reduction in size and weight.

JP 2000-283668 A

  As described above, the gas whose temperature has been increased by being compressed to a high pressure by the compressor is cooled by the heat exchanger before being filled into the tank or the cylinder. However, the compression of the gas is not limited to the so-called single-stage compression in which the compressor is compressed only once, but the gas once compressed by the compressor by sequentially passing the gas through a plurality of compressors. There are cases where multi-stage compression is performed in which the compressor is further compressed by the next-stage compressor.

  In the case of multistage compression, the temperature of the gas rises every time it is compressed by the compressor, so the compressed gas is passed through a heat exchanger and cooled before being supplied to the next stage compressor. That is, it is necessary to prepare a heat exchanger having the same number as the number of compressors and to construct a multistage compression system in which a plurality of heat exchangers are connected in series alternately as well as a plurality of compressors.

When a conventional heat exchanger as disclosed in Patent Document 1 is used in such a multistage compression system, a large installation area is required to arrange a plurality of compressors and heat exchangers. If the number of problems and the number of compressors and heat exchangers increase, the piping becomes complicated and a larger installation area is required.
Furthermore, since the conventional heat exchanger has low pressure resistance, it is not suitable for handling a gas that has become very high pressure due to multistage compression, and the development of a heat exchanger with high pressure resistance is also an important issue.

  Then, in view of the problems and problems described above, an object of the present invention is to provide a compact heat exchanger having high pressure resistance and a heat exchange system using the heat exchanger.

In order to achieve the above-described object, the present invention takes the following technical means.
The laminated heat exchanger according to the present invention is a laminated heat exchanger in which a plurality of heat exchange units that perform heat exchange of fluids sent from a plurality of machines are laminated, and the heat exchange units include a plurality of heat exchange units. The flow path plate has a structure in which the flow path plates are laminated, and the flow path plate has a concave groove formed on the surface as the flow path of the fluid.

Here, 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 correspond one-to-one with each of the plurality of machines.
Further, each of the plurality of heat exchange units is provided with a supply hole for supplying a fluid to the heat exchange unit and a discharge hole for discharging the supplied fluid, and is provided in each heat exchange unit. It is preferable that the supply hole and the discharge hole are formed to have a length that directly communicates with the outside along the stacking direction of the heat exchange units, and are arranged so that the arrangement positions in plan view do not overlap each other.

In addition, the flow path plate may be made of metal, and the flow path of the flow path plate may be formed by chemical etching.
Moreover, it is preferable that the laminated metal channel plates are joined to each other by diffusion bonding.
Here, the heat exchange system according to the present invention is formed by stacking a plurality of machines that cause a change in the amount of heat with respect to the fluid and a heat exchange unit that performs heat exchange of the fluid whose amount of heat has changed by the plurality of machines. A heat exchange system having a stacked heat exchanger;
The stacked heat exchanger is the above-described stacked heat exchanger.

  According to the present invention, a compact heat exchanger and heat exchange system having high pressure resistance can be obtained.

It is a conceptual diagram which shows the structure of a multistage heat exchange system, (a) is a conceptual diagram which shows the structure of the conventional heat exchange system, (b) shows the structure of the heat exchange system by 1st Embodiment of this invention. It is a conceptual diagram. It is a figure which shows the cross-section of the laminated heat exchanger by 1st Embodiment. It is a figure which shows the cross-section of the laminated heat exchanger by 1st Embodiment. It is a plane conceptual diagram which shows the structure of all the plates which comprise the laminated heat exchanger by 1st Embodiment. It is a top view which shows the structure of the plate which comprises the laminated heat exchanger by 1st Embodiment, (a) is a top view which shows the structure of a flow-path plate, (b) is a top view which shows the structure of the plate for cooling. It is. It is a figure explaining the differential pressure | voltage of the fluid supplied to each heat exchange unit of the laminated heat exchanger by 1st Embodiment. It is a top view which shows the structure of the plate for cooling used with the laminated heat exchanger by 2nd Embodiment of this invention. It is a figure which shows the cross-section of the laminated heat exchanger by 2nd Embodiment. It is a figure which shows the cross-section of the laminated heat exchanger by 2nd Embodiment.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[First Embodiment]
(Outline of heat exchange system)
A heat exchange system according to a first embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a conceptual diagram illustrating a configuration of a multistage heat exchange system using a plurality of machines, which are compressors, and a plurality of heat exchangers. Fig.1 (a) is a conceptual diagram which shows the structure of the heat exchange system using the conventional heat exchanger, and FIG.1 (b) is the heat exchange system using the laminated heat exchanger 2a by this embodiment. It is a conceptual diagram which shows the structure of 1a.

The heat exchange system 1a described in the present embodiment includes a plurality of compressors connected in series, and in a multistage compression process in which gas (gas) is sequentially pressurized and compressed to change to high pressure gas. A heat exchanger is provided in the subsequent stage.
(Conventional heat exchange system)
The heat exchange system shown in FIG. 1A shows a configuration in the case where a conventional heat exchanger is used. The heat exchange system in FIG. 1A includes four compressors, a first compressor to a fourth compressor shown as 1st-comp to 4th-comp, and a first heat exchanger shown as 1st-ex to 4th-ex. To four heat exchangers of the fourth heat exchanger.

In each of the four compressors and heat exchangers, first, the discharge port of the first compressor and the suction port of the first heat exchanger are connected by a pipe, and the discharge port of the first heat exchanger and the suction port of the second compressor are connected. Are connected by a pipe. Thus, the conventional heat exchange system is configured as shown in FIG. 1A while connecting the discharge port of the compressor and the suction port of the heat exchanger.
(The heat exchange system of this application)
On the other hand, the heat exchange system 1a shown in FIG. 1 (b) includes a compressor, which is four machines, a first compressor C1 to a fourth compressor C4 shown as 1st-comp to 4th-comp, and 1st-unit to It is configured by a laminated heat exchanger 2a in which four heat exchange units of a first heat exchange unit U1 to a fourth heat exchange unit U4 shown as 4th-unit are laminated and integrated.

  The first heat exchange unit U1 to the fourth heat exchange unit U4 of the stacked heat exchanger 2a shown in FIG. 1B are replaced with the conventional first heat exchanger to fourth heat exchanger shown in FIG. The first heat exchange unit U1 performs heat exchange (cooling) of the fluid discharged from the first compressor C1 and becomes a high temperature, and the second heat exchange unit U2 performs the second compressor C2. Heat exchange (cooling) of the fluid that has been discharged from the tank and has reached a high temperature is performed. The third heat exchange unit U3 performs (cooling) heat exchange of the fluid discharged from the third compressor C3 and becomes high temperature, and the fourth heat exchange unit U4 is discharged from the fourth compressor C4 and becomes high temperature. Heat exchange (cooling).

  Thus, the heat exchange system 1a according to the present embodiment includes a plurality of machines (for example, the first compressor C1 to the fourth compressor C4) that cause a change in the amount of heat with respect to the fluid (for example, hydrogen gas), and the plurality of these machines. A stacked heat exchanger 2a in which heat exchange units (for example, the first heat exchange unit U1 to the fourth heat exchange unit U4) that perform heat exchange of a fluid whose amount of heat has been changed by a machine are stacked. .

  In the present embodiment, a state in which a plurality of machines that cause a change in the amount of heat in the fluid are connected in series to form a single flow path is referred to as a state in which the plurality of machines are connected in multiple stages. If a plurality of compressors C1 to C4 are connected in multiple stages as in the present embodiment, the hydrogen gas as a fluid passes through one flow path formed by the multistage compressors C1 to C4 to the first compressor. It flows in the order of C1, second compressor C2, third compressor C3, and fourth compressor C4. However, as the hydrogen gas passes through the compressors C1 to C4, the amount of heat changes and the temperature rises. Therefore, the hydrogen gas discharged from the first compressor C1 to the fourth compressor C4 passes through the compressors C1 to C4. Each time it flows into the corresponding first heat exchange unit U1 to fourth heat exchange unit U4, heat exchange is performed and sucked into the next stage compressor.

  That is, the hydrogen gas compressed (pressurized) by the first compressor C1 and having a high temperature flows into the first heat exchange unit U1 of the stacked heat exchanger 2a, is cooled, and is supplied to the second compressor C2 at the next stage. Inhaled. The sucked hydrogen gas is further compressed by the second compressor C2 and becomes high temperature, returned to the stacked heat exchanger 2a, and flows into the second heat exchange unit U2 to be cooled. By repeating such circulation until the hydrogen gas passes through the fourth compressor C4 to the fourth heat exchange unit U4, the hydrogen gas becomes a very high pressure gas.

Thus, since the fluid discharged from the first compressor C1 flows into the first heat exchange unit U1, and the fluid discharged from the second compressor C2 flows into the second heat exchange unit U2, the first compressor C1 and the first heat exchange unit U1 are paired with each other, and it can be said that the second compressor C2 and the second heat exchange unit U2 are also paired with each other.
Similarly, it can be said that the third compressor C3 is paired with the third heat exchange unit U3, and the fourth compressor C4 is paired with the fourth heat exchange unit U4.
At this time, the cooling water can be controlled and cooled for each unit by a stacking method, or all units can be cooled together.

  The laminated heat exchanger 2a according to the present embodiment realizes the functions of a plurality of heat exchangers in a conventional heat exchange system by an integrated channel structure. The laminated heat exchanger 2a according to the present embodiment can be made smaller than a conventional heat exchanger, and piping with a compressor can be made simple and easy. Furthermore, it is possible to reduce the area of the installation location necessary for installing the heat exchange system including the compressor.

(Configuration of stacked heat exchanger)
With reference to FIG.2 and FIG.3, the structure of the laminated heat exchanger 2a by this embodiment is demonstrated.
FIG. 2 is a diagram showing the structure of the laminated heat exchanger 2a, and shows an AA section and a CC section of the laminated heat exchanger 2a. FIG. 3 is a view showing a BB cross section of the laminated heat exchanger 2a.
The stacked heat exchanger 2a includes a first heat exchange unit U1 to a fourth heat exchange unit U4 indicated by 1st to 4th, and an upper surface plate (upper end plate) 3 is stacked on the upper surface of the stacked body. The lower surface plate (lower end plate) 4 is laminated on the substrate. Each of the first heat exchanging unit U1 to the fourth heat exchanging unit U4 includes a flat channel plate (channel plate) in which a channel of hydrogen gas as a fluid is formed and cooling water as a cooling medium. A plurality of flat channel plates (cooling plates) in which channels are formed are alternately stacked.

At this time, depending on the required heat exchanger performance, the both sides of the hydrogen-side flow path plate may be arranged and stacked so as to be sandwiched between the cooling plates.
Accordingly, each of the first heat exchange unit U1 to the fourth heat exchange unit U4 has a rectangular parallelepiped shape in which a flat plate for fluid and a cooling plate are stacked. Since the first heat exchange unit U1 to the fourth heat exchange unit U4 having such a rectangular parallelepiped shape are stacked, the stacked heat exchanger 2a is high in the stacking direction of the first heat exchange unit U1 to the fourth heat exchange unit U4. It becomes a rectangular parallelepiped shape.

Before explaining the flow of the fluid and the cooling water in the stacked heat exchanger 2a with reference to FIGS. 4 and 5, the first flow path used for the first heat exchange unit U1 to the fourth heat exchange unit U4. The configurations of the plate P1 to the fourth flow path plate P4 and the cooling plate CP1 will be described, and the configuration of the stacked heat exchanger 2a will be described in detail.
FIG. 4 is a diagram showing all the plates constituting the stacked heat exchanger 2a. The first channel plate (1st plate) P1 constituting the first heat exchange unit U1 is shown on the upper left side of FIG. 4, and in order toward the right, the third channel plate (3rd plate) P3. A fourth flow path plate (4th plate) P4 and a second flow path plate (2nd plate) P2 are shown. The flow path plates P1 to P4 are illustrated in the order of 1st, 3rd, 4th, and 2nd from left to right in FIG. 2 and FIG. 3, in the first heat exchange unit U1 to fourth heat exchange. The unit U4 is based on being stacked in the first, third, fourth, and second order in order from the top.

The upper left plate (upper end plate) 3 stacked on the upper surface of the stacked heat exchanger is shown on the lower left side of FIG. 4. The cooling plates are stacked between the flow path plates in order toward the right. CP1 shows a lower surface plate (lower end plate) 4 laminated on the lower surface of the laminated heat exchanger.
Each plate shown in FIG. 4 shows a configuration when the stacked heat exchanger 2a is viewed from the upper surface side, that is, when viewed from the upper end plate 3 along the direction from the upper end plate 3 toward the lower end plate 4.

(First heat exchange unit)
First, the first heat exchange unit (1st heat exchange unit) U1 in the laminated heat exchanger 2a is configured by alternately laminating first flow path plates (1st plates) P1 and cooling plates CP1. .
(First flow path plate)
As shown in FIG. 4, the first flow path plate P1 is a rectangular flat plate having a thickness of several millimeters made of a metal such as stainless steel or aluminum. At both ends in the longitudinal direction of the first flow path plate P1 shown in FIG. 4, hydrogen gas supplied from the first compressor C1 flows into the first flow path plate P1 on the left side of the upper end portion in the drawing. A fluid supply hole 1IN is formed to form a through hole. Further, on the right side of the lower end portion, a fluid discharge hole 1OUT for allowing hydrogen gas to flow out from the first flow path plate P1 is formed to form a through hole. That is, the fluid supply hole 1IN and the fluid discharge hole 1OUT are formed in the diagonal direction of the first flow path plate P1.

  On one surface of the first flow path plate P1 in which the fluid supply hole 1IN and the fluid discharge hole 1OUT are formed, and on the upper surface depicted in FIG. 4, a hydrogen gas flow path is formed between the fluid supply hole 1IN and the fluid discharge hole. It is formed to connect 1OUT. By this flow path, the hydrogen gas flowing in from the fluid supply hole 1IN flows along the formed flow path, and flows out of the first flow path plate from the fluid discharge hole 1OUT.

  FIG. 5A is a diagram showing in detail the configuration of the first flow path plate P1 shown in FIG. A plurality of flow paths formed in the first flow path plate P1 are formed so as to meander in the width direction of the first flow path plate P1, and connect the fluid supply hole 1IN and the fluid discharge hole 1OUT. The plurality of flow paths are formed so as to be substantially parallel to each other and do not cross each other. Accordingly, the hydrogen gas flowing in from the fluid supply hole 1IN reaches the fluid discharge hole 1OUT only through the one flow-in channel.

The reason why the flow path of the first flow path plate P1 meanders in the width direction of the first flow path plate P1 is to make the flow path as long as possible within the limited area of the first flow path plate P1. Yes, for that purpose, the flow path may follow a trajectory other than the meandering shown in FIGS.
Such a channel is called a microchannel in the technical field of the present invention, and is a narrow channel having a width of about 1 mm. The flow path called the microchannel is formed by using an etching technique such as chemical etching. Since the etching is an isotropic process, the depth of the channel approaches 0.5 times the channel width, but in this embodiment, the depth is about 0.4 to 0.6 times the channel width. To do.

  In addition, hydrogen gas supplied from the third compressor C3 flows into the third flow path plate P3, which will be described later, at both ends of the first flow path plate P1 in the longitudinal direction on the right side of the upper end portion in the drawing. A fluid supply hole 3IN that is a through hole is formed. Further, on the left side of the lower end portion, a fluid discharge hole 3OUT which is a through hole for allowing hydrogen gas to flow out from the third flow path plate P3 is formed. The fluid supply hole 3IN and the fluid discharge hole 3OUT are not connected to the flow path of the first flow path plate P1.

  Further, between the fluid discharge hole 1OUT and the through hole communicating with the fluid discharge hole 3OUT, cooling water IN which is a through hole for allowing cooling water to flow into a cooling plate CP1 described later is formed, and the fluid supply hole 1IN and Between the through hole communicating with the fluid supply hole 3IN, a cooling water OUT, which is a through hole for allowing the cooling water to flow out from the cooling plate CP1 described later, is formed. The fluid supply hole 3IN and the fluid discharge hole 3OUT are not connected to the flow path of the first flow path plate P1.

The other surface of the first flow path plate P1, that is, the lower surface where no flow path is formed and not shown in the drawing is a smooth surface.
(Cooling plate)
The cooling plate CP1 has substantially the same configuration as the first flow path plate P1, is made of the same material as the first flow path plate P1, and has a first flow path at the upper end at both ends in the longitudinal direction. The fluid supply hole 1IN, the cooling water OUT, and the fluid supply hole 3IN are formed at the same position as the plate P1, and the fluid discharge hole 1OUT and the cooling water are formed at the same position as the first flow path plate P1 at the lower end. IN and a fluid discharge hole 3OUT are formed.

  FIG. 5B is a diagram showing in detail the configuration of the cooling plate CP1 shown in FIG. Similarly to the first flow path plate P1, a plurality of flow paths formed in the cooling plate CP1 are formed so as to meander in the width direction and connect the cooling water IN and the cooling water OUT. The plurality of channels are also formed so as to be substantially parallel to each other like the first channel plate P1, and do not cross each other. Accordingly, the cooling water that has flowed in from the cooling water IN reaches the cooling water OUT through only one flow channel that has flowed in.

The other surface of the cooling plate CP1, that is, the lower surface not formed with a flow path and not shown in the drawing, is a smooth surface.
The first heat exchange unit U1 is configured by alternately stacking the first flow path plate P1 and the cooling plate CP1 described above. First, the cooling plate CP1 is used as the lowermost layer of the first heat exchange unit U1, the first flow path plate P1 is stacked thereon, and the cooling plate CP1 is further stacked thereon. The first flow path plate P1 and the cooling plate CP1 are alternately stacked in layers on the cooling plate CP1, and the uppermost layer is used as the cooling plate CP1.

  Here, the number of first flow path plates P1 to be stacked is arbitrary, but the capacity of the first heat exchange unit U1 can be changed by changing the number of first flow path plates P1. This also applies to the second heat exchange unit U2 to the fourth heat exchange unit U4 described later, but in the present embodiment, the capacities of the first heat exchange unit U1 to the fourth heat exchange unit U4 are the same. Configured.

  When the first flow path plate P1 and the cooling plate CP1 stacked in this way are pressurized under a predetermined temperature and the joining surfaces of the first flow path plate P1 and the cooling plate CP1 are diffusion-bonded to each other, A first heat exchange unit U1 in which a plurality of plates are integrated is obtained. That is, the smooth lower surface of the first flow path plate P1 diffusion-bonded on the cooling plate CP1 serves as a cover for the flow path of the cooling plate CP1, and the cooling diffusion-bonded on the first flow path plate P1. The smooth lower surface of the plate CP1 serves as a lid for the flow path of the first flow path plate P1.

Since the first flow path plate P1 and the cooling plate CP1 are firmly joined by this diffusion joining, the first heat exchange unit U1 has a very high pressure resistance against the supplied fluid.
When hydrogen gas is supplied from the fluid supply hole 1IN in the first heat exchange unit U1 that is diffusion-bonded so that the lower surface of the immediately upper layer serves as a lid, the fluid supply hole 1IN becomes the flow path of the first flow path plate P1. However, since the flow path of the cooling plate CP1 is isolated from the upper surface of the cooling plate and the lower surface of the first flow path plate, the hydrogen gas flows into the cooling plate CP1. It does not flow into the flow path.

Similarly, when the cooling water is supplied from the cooling water IN, the cooling water IN is connected to the flow path of the cooling plate CP1, and thus the cooling water flows in. However, the flow path of the first flow path plate P1 is the first flow path. Since the upper surface of the flow path plate P1 and the lower surface of the cooling plate CP1 are separated from each other, the cooling water does not flow into the flow path of the first flow path plate P1.
(Third heat exchange unit)
The third heat exchange unit U3 is a heat exchange unit disposed immediately below the first heat exchange unit U1. The third flow path plate P3 used in the third heat exchange unit U3 is a member that is substantially the same material and size as the first flow path plate P1, and has the same flow path as the first flow path plate P1. ing.

(3rd flow path plate)
The third flow path plate P3 does not have the fluid supply hole 1IN and the fluid discharge hole 1OUT formed in the first flow path plate P1, but the fluid supply hole 3IN, the fluid discharge hole 3OUT, and the cooling water IN and the cooling water OUT. Is formed. A flow path that is a microchannel is formed on one surface of the third flow path plate P3 and the upper surface depicted in FIG. 4, and the fluid supply hole 3IN and the fluid discharge hole 3OUT are connected by this flow path.

  When the third flow path plate P3 and the cooling plate CP1 are stacked in the same manner as the first heat exchange unit U1 and diffusion-bonded between the plates, a third heat exchange unit U3 is obtained. In the third heat exchange unit U3, when hydrogen gas is supplied from the fluid supply hole 3IN, the fluid supply hole 3IN is connected to the flow path of the third flow path plate P3, so that hydrogen gas flows in, but for cooling Since the flow path of the plate CP1 is isolated by joining the upper surface of the cooling plate CP1 and the lower surface of the third flow path plate P3, hydrogen gas does not flow into the flow path of the cooling plate CP1.

Similarly, when the cooling water is supplied from the cooling water IN, the cooling water IN flows into the cooling plate CP1 because it is connected to the flow path of the cooling plate CP1, but the third flow path plate P3 has a third flow path. Since the upper surface of the flow path plate P3 and the lower surface of the cooling plate CP1 are separated from each other, the cooling water does not flow into the flow path of the third flow path plate P3.
(4th heat exchange unit)
The fourth heat exchange unit U4 is a heat exchange unit disposed immediately below the third heat exchange unit U2. The fourth flow path plate P4 used in the fourth heat exchange unit U4 is a member that is substantially the same material and size as the first flow path plate P1 and the third flow path plate P3, and the first flow path plate P1 and A flow path similar to the third flow path plate P3 is formed.

(4th flow path plate)
As shown in FIG. 4, the fourth flow path plate P4 has a configuration in which the configuration of the third flow path plate P4 is reversed left and right, and the through-hole formed on the diagonal line is connected to the fluid supply hole 4IN and the fluid. This is the discharge hole 4OUT. The fourth flow path plate P4 is also formed with cooling water IN and cooling water OUT. A flow path which is a microchannel is formed on one surface of the fourth flow path plate P4 and the upper surface depicted in FIG. 4, and the fluid supply hole 4IN and the fluid discharge hole 4OUT are connected by this flow path. .

  When the fourth flow path plate P4 and the cooling plate CP1 are laminated in the same manner as the first heat exchange unit U1 and the third heat exchange unit U3 and diffusion-bonded between the plates, a fourth heat exchange unit U4 is obtained. . In the fourth heat exchange unit U4, when hydrogen gas is supplied from the fluid supply hole 4IN, the fluid supply hole 4IN is connected to the flow path of the fourth flow path plate P4, so that hydrogen gas flows in, but for cooling Since the flow path of the plate CP1 is isolated by joining the upper surface of the cooling plate CP1 and the lower surface of the fourth flow path plate P4, hydrogen gas does not flow into the flow path of the cooling plate CP1.

Similarly, when the cooling water is supplied from the cooling water IN, the cooling water does not flow into the flow path of the fourth flow path plate P4 for the same reason as the first heat exchange unit U1 and the third heat exchange unit U3. .
(Second heat exchange unit)
The second heat exchange unit U2 is a heat exchange unit disposed immediately below the fourth heat exchange unit U4. The second flow path plate P2 used in the second heat exchange unit U2 is a member that is substantially the same material and size as the first flow path plate P1, the third flow path plate P3, and the fourth flow path plate P4. A flow path similar to the flow path plates is formed.

(Second channel plate)
As shown in FIG. 4, the second flow path plate P2 has a configuration in which the configuration of the first flow path plate P1 is reversed left and right, and is different from the diagonal line connecting the fluid supply hole 4IN and the fluid discharge hole 4OUT. The through holes formed on the other diagonal line are a fluid supply hole 2IN and a fluid discharge hole 2OUT. Cooling water IN and cooling water OUT are also formed in the second flow path plate P2. A flow path that is a microchannel is formed on one surface of the second flow path plate P2 in FIG. 4, and the fluid supply hole 2IN and the fluid discharge hole 2OUT are connected by this flow path.

  When the second flow path plate P2 and the cooling plate CP1 are laminated in the same manner as the first heat exchange unit U1, the third heat exchange unit U3, and the fourth heat exchange unit U4 and each plate is diffusion-bonded, Two heat exchange units U2 are obtained. In the second heat exchange unit U2, when hydrogen gas is supplied from the fluid supply hole 2IN, the fluid supply hole 2IN is connected to the flow path of the second flow path plate P2, so that hydrogen gas flows in. Since the flow path of the plate CP1 is isolated from the upper surface of the cooling plate CP1 and the lower surface of the second flow path plate P2, hydrogen gas does not flow into the flow path of the cooling plate CP1.

Similarly, when cooling water is supplied from the cooling water IN, the cooling water is supplied to the second flow path plate P2 for the same reason as the first heat exchange unit U1, the third heat exchange unit U3, and the fourth heat exchange unit U4. There is no inflow.
The heat exchange units U1 to U4 obtained as described above are arranged in order from the top to the first heat exchange unit U.
1, the third heat exchange unit U3, the fourth heat exchange unit U4, and the second heat exchange unit U2 are stacked in this order, and the upper end plate 3 is stacked on the upper surface of the first heat exchange unit U1, 2 The lower end plate 4 is overlapped on the lower surface of the heat exchange unit U2, and the heat exchange units U1 to U4 and the upper and lower end plates 3 and 4 are joined by diffusion bonding.

  Thereby, the stacked heat exchanger 2a according to the present embodiment is formed. Similar to the first flow path plate P1, the upper end plate 3 has a fluid supply hole 1IN and a fluid discharge hole 1OUT, a fluid supply hole 3IN and a fluid discharge hole 3OUT, and a cooling water IN and a cooling water OUT. The lower end plate 4 has a fluid supply hole 2IN and a fluid discharge hole 2OUT, and a fluid supply hole 4IN and a fluid discharge hole 4OUT.

Here, returning to FIG. 2, the AA cross section and CC cross section of the stacked heat exchanger 2a will be referred to.
The AA cross section is a surface including the fluid supply hole 1IN and the fluid discharge hole 3OUT in the upper end plate 3 and the fluid supply hole 4IN and the fluid discharge hole 2OUT in the lower end plate 4, and the stacked heat exchanger 2a in the stacking direction. It is sectional drawing when cut | disconnecting.
The CC cross section is a surface including the fluid supply hole 3IN and the fluid discharge hole 1OUT in the upper end plate 3 and the fluid supply hole 2IN and the fluid discharge hole 4OUT in the lower end plate 4, and the stacked heat exchanger 2a is stacked. It is sectional drawing when cut | disconnected in a direction.

  In the upper end plate 3, the fluid supply hole 1IN and the fluid discharge hole 1OUT are formed on one diagonal line, and the fluid supply hole 3IN and the fluid discharge hole 3OUT are formed on the other diagonal line. Accordingly, the fluid supply hole 1IN shown in the AA section and the fluid discharge hole 1OUT shown in the CC section corresponding to the fluid supply hole 1IN are stacked in the first heat exchange unit U1 in each section. It is formed so as to communicate with the outside directly along the direction. The fluid supply hole 3IN shown in the CC cross section and the fluid discharge hole 3OUT shown in the AA cross section corresponding to the fluid supply hole 3IN penetrate the first heat exchange unit U1 in each cross section and pass through the third heat exchange unit. U3 is formed so as to communicate with the outside directly along the stacking direction of the heat exchange units.

  In the lower end plate 4, the fluid supply hole 4IN and the fluid discharge hole 4OUT are formed on one diagonal line, and the fluid supply hole 2IN and the fluid discharge hole 2OUT are formed on the other diagonal line. Therefore, the fluid supply hole 4IN shown in the AA cross section and the fluid discharge hole 4OUT shown in the CC cross section corresponding to the fluid supply hole 4IN penetrate the second heat exchange unit U2 in each cross section and pass through the fourth heat exchange unit. U4 is formed so as to communicate with the outside directly along the stacking direction of each heat exchange unit. Furthermore, the fluid supply hole 2IN shown in the CC cross section and the fluid discharge hole 2OUT shown in the AA cross section corresponding to the fluid supply hole 2IN are stacked in the second heat exchange unit U2 in each cross section. It is formed so as to communicate with the outside directly along the direction.

  Here, the BB cross section of the laminated heat exchanger 2a shown in FIG. 3 is referred to. The BB cross section is a cross-sectional view of the upper end plate 3 including the cooling water IN and the cooling water OUT when the stacked heat exchanger 2a is cut in the stacking direction. In the upper end plate 3, the cooling water IN and the cooling water OUT are formed on the BB line along the longitudinal direction of the upper end plate 3. Accordingly, both the cooling water IN and the cooling water OUT appear to be formed in all the heat exchange units U1 to U4 of the stacked heat exchanger 2a in the BB cross section.

  As described above, in the stacked heat exchanger 2a according to the present embodiment, each of the plurality of heat exchange units U1 to U4 is supplied with a fluid supply hole (supply hole) that supplies a fluid to each heat exchange unit. A fluid discharge hole (discharge hole) for discharging the fluid is provided. The supply hole and the discharge hole provided in each heat exchange unit are formed in a length that communicates directly with the outside along the stacking direction of the heat exchange units U1 to U4, and from the upper end plate 3 and the lower end plate 4 It can be said that the arrangement positions in the plan view as seen do not overlap each other. By adopting such a structure, there is no need for a partition or the like for maintaining pressure between the heat exchanger units.

(Operation of heat exchange system)
Next, referring to FIG. 2 and FIG. 3, one-to-one correspondence is provided for each of the heat exchange units U1 to U4 of the stacked heat exchanger 2a in which the fluid supply holes and the fluid discharge holes are formed as described above. Connect each compressor. That is, the discharge port of the first compressor C1 is connected to the fluid supply hole 1IN of the upper end plate 3, and the fluid supply hole 1OUT of the upper end plate 3 is connected to the suction port of the second compressor C2. Next, the discharge port of the second compressor C2 is connected to the fluid supply hole 2IN of the lower end plate 4, and the fluid supply hole 2OUT of the lower end plate 4 is connected to the suction port of the third compressor C3. Subsequently, the discharge port of the third compressor C3 is connected to the fluid supply hole 3IN of the upper end plate 3, and the fluid supply hole 3OUT of the upper end plate 3 is connected to the suction port of the fourth compressor C4. Finally, the discharge port of the fourth compressor C4 is connected to the fluid supply hole 4IN of the lower end plate 4, and the fluid supply hole 4OUT of the lower end plate 4 is connected to the filling port of the tank or cylinder.

Further, the cooling water discharge port of the cooling water supply pump is connected to the cooling water IN of the upper end plate 3, and the drain pipe is connected to the cooling water OUT. By this connection, a heat exchange system 1a is configured that performs heat exchange of the compressed hydrogen gas while compressing the hydrogen gas in multiple stages from the suction port of the first compressor C1 to the filling port of the tank or cylinder.
As shown in FIG. 3, first, the cooling water supply pump is operated to continuously supply cooling water from the cooling water IN of the upper end plate 3 of the stacked heat exchanger 2a. The supplied cooling water flows from the cooling water IN penetrating from the uppermost first heat exchange unit U1 to the lowermost second heat exchange unit U2 into the flow path of the cooling plate of each heat exchange unit. While being filled, it is discharged to the cooling water OUT penetrating from the uppermost first heat exchange unit U1 to the lowermost second heat exchange unit U2. Since the cooling water is supplied one after another by the cooling water supply pump, the cooling water flowing through the flow path of the cooling plate CP1 and discharged to the cooling water OUT exits from the cooling water OUT of the upper end plate 3 to the drain pipe. Discharged. In this way, the flow of the cooling water in all the cooling plates CP1 of the heat exchange units U1 to U4 is ensured.

In addition, the first compressor C1, which is the first stage machine, compresses the hydrogen gas, and the hydrogen gas whose pressure increases and the temperature rises from the discharge port of the first compressor C1 to the fluid supply hole 1IN of the upper end plate 3. Is sent to.
As shown in the AA cross section of FIG. 2, the hydrogen gas supplied to the fluid supply hole 1IN flows into the flow path of the first flow path plate P1 of the first heat exchange unit U1 as a hydrogen gas flow (1). The hot hydrogen gas flowing into the first flow path plate P1 is cooled by exchanging heat with the cooling water flowing through the cooling plates CP1 stacked above and below the flow path of the first flow path plate P1. Is done.

  As shown in the CC cross section of FIG. 2, the hydrogen gas flow (1) cooled by the first heat exchange unit U1 is discharged from the flow path of the first flow path plate P1 to the fluid discharge hole 1OUT, and the upper end plate. 3 flows into the suction port of the second compressor C2, which is the second stage machine. The second compressor C2 compresses the hydrogen gas, and the hydrogen gas whose pressure and temperature have increased is sent from the discharge port of the second compressor C2 to the fluid supply hole 2IN of the lower end plate 4.

  As shown in the CC cross section of FIG. 2, the hydrogen gas supplied to the fluid supply hole 2IN flows into the flow path of the second flow path plate P2 of the second heat exchange unit U2 as a hydrogen gas flow (2). The high-temperature hydrogen gas flowing into the second flow path plate P2 is cooled by exchanging heat with the cooling water flowing through the cooling plates CP1 stacked above and below the flow path of the second flow path plate P2. Is done.

  As shown in the AA cross section of FIG. 2, the hydrogen gas flow (2) cooled by the second heat exchange unit U2 is discharged from the flow path of the second flow path plate P2 to the fluid discharge hole 2OUT, and the lower end plate 4 flows into the suction port of the third compressor C3 which is the third stage machine. The third compressor C3 further compresses the hydrogen gas compressed by the first compressor C1 and the second compressor C2, and the hydrogen gas whose pressure and temperature have increased from the discharge port of the third compressor C3 to the fluid of the upper end plate 3 It is sent out to the supply hole 3IN.

As shown in the CC cross section of FIG. 2, the hydrogen gas supplied to the fluid supply hole 3IN flows into the flow path of the third flow path plate P3 of the third heat exchange unit U3 as a hydrogen gas flow (3). The high-temperature hydrogen gas flowing into the third flow path plate P3 is cooled by exchanging heat with the cooling water flowing through the cooling plates CP1 stacked above and below the flow path of the third flow path plate P3. Is done.

  As shown in the AA cross section of FIG. 2, the hydrogen gas flow (3) cooled by the third heat exchange unit U3 is discharged from the flow path of the third flow path plate P3 to the fluid discharge hole 3OUT, and the upper end plate. 3 flows into the suction port of the fourth compressor C4, which is the fourth-stage machine, which is the final stage. The fourth compressor C4 further compresses the hydrogen gas compressed up to the third compressor C3 to a target pressure, and the hydrogen gas whose pressure and temperature have increased from the discharge port of the fourth compressor C4 to the lower end plate 4 It is delivered to the fluid supply hole 4IN.

  As shown in the CC cross section of FIG. 2, the hydrogen gas supplied to the fluid supply hole 4IN flows into the flow path of the fourth flow path plate P4 of the fourth heat exchange unit U4 as the hydrogen gas flow (4). The high-temperature hydrogen gas that has flowed into the fourth flow path plate P4 is cooled by exchanging heat with the cooling water flowing through the cooling plates CP1 stacked above and below the flow path of the fourth flow path plate P4. Is done.

As shown in the AA cross section of FIG. 2, the hydrogen gas flow (4) cooled by the fourth heat exchange unit U4 is discharged from the flow path of the fourth flow path plate P4 to the fluid discharge hole 4OUT, and the lower end plate. 4 is supplied from the fluid discharge hole 4OUT to the filling port of the tank or cylinder and filled.
As described above, the heat exchange system 1a according to the present embodiment uses the stacked heat exchanger 2a in which a plurality of heat exchange units U1 to U4 are stacked and integrated, and includes a plurality of compressors C1 to C4. Each time the fluid compressed in multiple stages is compressed by the compressor of each stage, heat is exchanged in the corresponding heat exchange unit.

  The AA sectional view of FIG. 6 shows the differential pressure between the upper end plate 3 and the first heat exchange unit U1, the differential pressure between adjacent heat exchange units, the second heat exchange unit U2 and the lower end plate in the present embodiment. The differential pressure (ΔP) from 4 is shown. The differential pressure between the upper end plate 3 and the first heat exchange unit U1 is 5 MPa, the differential pressure between the first heat exchange unit U1 and the third heat exchange unit U3 is 20 MPa, and the third heat exchange unit U3 and the fourth heat exchange unit. The differential pressure with U4 is 30 MPa, the differential pressure between the fourth heat exchange unit U4 and the second heat exchange unit U2 is 40 MPa, and the differential pressure between the second heat exchange unit U2 and the lower end plate 4 is 10 MPa.

  In the configuration of the heat exchange system 1a, in order to prevent damage to the equipment due to fluctuations in the operation of the stacked heat exchanger 2a, the compressors at each stage are set so that the total differential pressure of the stacked heat exchanger 2a is minimized. It is desirable to determine the correspondence between each and each heat exchange unit. In the present embodiment, the first heat exchange unit U1 has a one-to-one correspondence with the first compressor C1, but may correspond to any one of the second compressor C2 to the fourth compressor C4 other than the first compressor C1. I do not care.

  For example, the first heat exchange unit U1 is associated with the third compressor C3, the second heat exchange unit U2 is associated with the first compressor C1, the third heat exchange unit U3 is associated with the fourth compressor C4, and the fourth heat Consider a case where the exchange unit U4 is associated with the second compressor C2. In this case, the hydrogen gas is supplied from the first compressor C1, the second heat exchange unit U2, the second compressor C2, the fourth heat exchange unit U4, the third compressor C3, the first heat exchange unit U1, the fourth compressor C4, and the third. It passes through the heat exchange unit U3 in this order, and is supplied to the filling port of the tank or cylinder and filled.

[Second Embodiment]
The heat exchange system 1b according to the second embodiment of the present invention will be described with reference to FIGS.
The heat exchange system 1b according to the present embodiment performs six-stage compression in which six compressors C1 to C6 and six heat exchange units U1 to U6 are connected in series. That is, the configuration of the stacked heat exchanger 2b in which the six heat exchange units U1 to U6 are stacked is different from the configuration of the stacked heat exchanger 2a according to the first embodiment, and will be described in detail below.

The laminated heat exchanger 2b according to the present embodiment is different from the laminated heat exchanger 2a according to the first embodiment in that the configuration of the cooling plate CP2 is the same as that of the cooling plate CP1 of the laminated heat exchanger 2a according to the first embodiment. Are different from each other and the fifth heat exchange unit U5 and the sixth heat exchange unit U6 are added. The configurations of the first flow path plate P1 to the fourth flow path plate P4 and the upper and lower end plates 3 and 4 are the same as in the first embodiment.

  FIG. 7 shows the configuration of the cooling plate CP2 used in the stacked heat exchanger 2b according to the present embodiment. In the cooling plate CP2 shown in FIG. 7, the flow path is opened as the cooling water IN on one long side along the longitudinal direction of the cooling plate CP2, and the flow path is opened as the cooling water OUT on the other long side. Plate. The cooling water IN and the cooling water OUT are formed at positions substantially along the diagonal direction of the cooling plate CP2. A plurality of flow paths formed in the cooling plate CP2 are formed so as to meander in the width direction of the cooling plate CP2, and connect the cooling water IN and the cooling water OUT.

The cooling plate CP2 has fluid supply holes 1IN to 4IN, fluid discharge holes 1OUT to 4OUT, fluid supply holes 5IN and 6IN, which will be described later, and through holes that can correspond to the fluids 5OUT and 6OUT on both ends in the longitudinal direction. ing.
Using such a cooling plate CP2, similarly to the first embodiment, the first flow path plate P1 is stacked to form the first heat exchange unit U1, and the second flow path plate P2 is stacked to generate the second heat. The exchange unit U2 is configured. Further, the third heat exchange unit U3 is configured by stacking the third flow path plate P3, and the fourth heat exchange unit U4 is configured by stacking the fourth flow path plate P4.

  The fifth flow path plate P5 and the sixth flow path plate P6 have substantially the same configuration as the cooling plate CP1 according to the first embodiment, and the cooling water OUT in the cooling plate CP1 according to the first embodiment In the path plate P5, it functions as 5IN, and the cooling water IN functions as 5OUT. Similarly, the sixth flow path plate P6 includes a through hole 6IN and a through hole 6OUT.

Therefore, as shown in FIGS. 8 and 9, in the upper end plate 3, through holes 6IN and 6OUT are formed at positions corresponding to 6IN and 6OUT of the sixth flow path plate P6. Through holes 5IN and 5OUT are formed at positions corresponding to 5IN and 5OUT of the fifth flow path plate P5.
Similarly to the first heat exchange unit U1 to the fourth heat exchange unit U4, the fifth heat exchange unit U5 is configured by using the cooling plate CP2 and the fifth flow path plate P5, and the cooling plate CP2 and the sixth flow path The sixth heat exchange unit U6 is configured using the plate P6.

  The heat exchange units U1 to U6 obtained as described above are used in order from the top, the first heat exchange unit U1, the third heat exchange unit U3, the sixth heat exchange unit U6, the fourth heat exchange unit U4, and the fifth heat exchange. The units U5 and the second heat exchange unit U2 are stacked in this order, and the upper end plate 3 is stacked on the upper surface of the first heat exchange unit U1, and the lower end plate 4 is stacked on the lower surface of the second heat exchange unit U2. The heat exchange units U1 to U6 and the upper and lower end plates 3 and 4 are joined by diffusion bonding.

  Thereby, the stacked heat exchanger 2b according to the present embodiment is formed. Similar to the first flow path plate P1, the upper end plate 3 has a fluid supply hole 1IN and a fluid discharge hole 1OUT, a fluid supply hole 3IN and a fluid discharge hole 3OUT, and 6IN and 6OUT. The lower end plate 4 has a fluid supply hole 2IN and a fluid discharge hole 2OUT, a fluid supply hole 4IN and a fluid discharge hole 4OUT, and 5IN and 5OUT. Here, in the fourth flow path plate P4, there may be no fluid supply holes 5IN and 6IN and through holes corresponding to the fluids 5OUT and 6OUT.

By laminating the first heat exchange unit U1 to the sixth heat exchange unit U6, the cooling plate CP2 is cooled along the vertical direction of the laminated heat exchanger 2b on the side of the laminated heat exchanger 2b. Water IN and cooling water OUT are opened. These cooling water IN and cooling water OUT are attached with a header 5 that forms a common flow path for each of the cooling water IN and the cooling water OUT along the vertical direction of the stacked heat exchanger 2b. Therefore, the cooling water supplied to the header 5 on the cooling water IN side flows into the flow path from the cooling water IN of each stacked cooling plate CP2, and flows out from the cooling water IN of each cooling plate CP2. Is discharged through the header 5 on the cooling water IN side. By attaching the header 5, the stacked heat exchanger 2b according to the present embodiment is completed.

  Also in the present embodiment, each of the plurality of heat exchange units U1 to U6 of the stacked heat exchanger 2b has a fluid supply hole (supply hole) for supplying a fluid to each heat exchange unit, and the supplied fluid is discharged. Fluid discharge holes (discharge holes) are provided. The supply hole and the discharge hole provided in each heat exchange unit are formed in a length that communicates directly with the outside along the stacking direction of the heat exchange units U1 to U6, and from the upper end plate 3 and the lower end plate 4 It can be said that the arrangement positions in the plan view as seen do not overlap each other.

  In the present embodiment, hydrogen gas is compressed into six stages using the above-described stacked heat exchanger 2b and six compressors C1 to C6. First heat exchange unit U1 and first compressor C1, second heat exchange unit U2 and second compressor C2,..., Fifth heat exchange unit U5 and fifth compressor C5, and sixth heat exchange unit U6 and sixth Corresponding in order as compressor C6, six compressors C1 to C6 constitute a six-stage heat exchange system 1b connected in series via the stacked heat exchanger 2b.

As shown in FIGS. 8 and 9, when the hydrogen gas passes through the heat exchange system 1b as a hydrogen gas flow (1) to a hydrogen gas flow (6), the hydrogen gas is compressed to six stages and is brought to a target pressure. Until pressurized. At that time, the heat exchange system 1b is preferably configured such that the sum of the differential pressures of adjacent heat exchange units is minimized.
By the way, it should be thought that embodiment disclosed this time is an illustration and restrictive at no points. In particular, in the embodiment disclosed this time, matters that are not explicitly disclosed, such as operating conditions and measurement conditions, various parameters, dimensions, weights, volumes, and the like of a component deviate from a range that is normally implemented by those skilled in the art. Instead, values that can be easily assumed by those skilled in the art are employed.

For example, in the first embodiment, four-stage compression is described in which four compressors C1 to C4 and four heat exchange units U1 to U4 are connected in series. However, two compressors and two heat exchanges are described. A configuration in which two two-stage compressions configured by connecting units in series are arranged in parallel may be adopted. Needless to say, a configuration in which one-stage compression and three-stage compression are arranged in parallel is also possible.
In the second embodiment, six-stage compression is described in which six compressors C1 to C6 and six heat exchange units U1 to U6 are connected in series. However, one-stage compression and five-stage compression are performed in parallel. In addition, a configuration in which two-stage compression and four-stage compression are arranged in parallel, and three-stage compression and three-stage compression are arranged in parallel is also possible.

  Moreover, although hydrogen gas was illustrated as a fluid of heat exchange system 1a, 1b, other gas and liquid can be employ | adopted not only as hydrogen gas but as a fluid. In this case, the cooling medium supplied to the cooling plates CP1 and CP2 can be appropriately changed according to the type of fluid supplied. Moreover, since this invention is also a heat exchange system, you may heat a fluid using the cooling plate as a heating plate by flowing a heating medium.

1a, 1b Heat exchange system 2a, 2b Laminated heat exchanger 3 Upper end plate 4 Lower end plate 5 Header C1 to C6 First compressor to sixth compressor P1 to P6 First flow path plate to sixth flow path plate U1 U6 1st heat exchange unit-6th heat exchange unit CP1, CP2 Cooling plate

Claims (6)

A stacked heat exchanger in which a plurality of heat exchange units that perform heat exchange of fluids sent from a plurality of machines are stacked,
The heat exchange unit has a structure in which a plurality of flow path plates are laminated,
The flow path plate has a concave groove formed on a surface thereof as a flow path for the fluid.   The stacked heat exchanger according to claim 1, wherein each of the plurality of heat exchange units is paired with each of the plurality of machines. Each of the plurality of heat exchange units is provided with a supply hole for supplying fluid to the heat exchange unit and a discharge hole for discharging the supplied fluid,
The supply hole and the discharge hole provided in each heat exchange unit are formed to have a length that communicates directly with the outside along the stacking direction of the heat exchange units so that the arrangement positions in plan view do not overlap each other. The stacked heat exchanger according to claim 2, wherein the stacked heat exchanger is provided. The flow path plate is made of metal,
The laminated heat exchanger according to any one of claims 1 to 3, wherein the flow path of the flow path plate is formed by chemical etching.   The laminated heat exchanger according to claim 4, wherein the laminated metal flow path plates are joined to each other by diffusion bonding. A heat exchange system comprising: a plurality of machines that cause a change in the amount of heat with respect to the fluid; and a stacked heat exchanger in which heat exchange units that perform heat exchange of the fluid whose amount of heat has been changed by the plurality of machines are stacked. In
The heat exchanger system according to claim 1, wherein the heat exchanger is a heat exchanger according to claim 1.