AU2021254598B2

AU2021254598B2 - Gas transfer module and gas transfer module assembly of co-electrolysis system

Info

Publication number: AU2021254598B2
Application number: AU2021254598A
Authority: AU
Inventors: Donghwan JEON; Woohyun JUNG; Ingoo KWON
Original assignee: Institute for Advanced Engineering
Current assignee: Institute for Advanced Engineering
Priority date: 2020-12-30
Filing date: 2021-10-21
Publication date: 2023-02-23
Anticipated expiration: 2041-10-21
Also published as: AU2021254598A1; KR102431680B1; KR20220096062A

Abstract

A gas transfer module of a co-electrolysis system includes a bottom block including a plurality of connecting parts for connection of a cell stack, and a bottom passage part disposed inside of the bottom block to connect the plurality of connecting parts; a wall block perpendicularly connected to an edge portion of one side of the bottom block and including a wall passage part disposed inside of the wall block to be perpendicularly connected to an end portion of the bottom passage part; and a pressing elastic member mounted to the connecting parts such that the cell stack is pressed against the connecting parts. 1/7 FIG.1 10 211 212 200 213-1 121 213--- 41110 214 113

Description

1/7

FIG.1

10

211 212

200 213-1

121

213- -

41110

214 113

GAS TRANSFER MODULE AND GAS TRANSFER MODULE ASSEMBLY OF CO ELECTROLYSIS SYSTEM RELATED APPLCIATIONS

This application claims priority from Korean Patent Application No. 10-2020-0188191

filed on 30 December 2020, the entire contents of which have been incorporated herein by

reference.

TECHNICAL FIELD

The present disclosure relates to a gas transfer module and a gas transfer module

assembly of a co-electrolysis system.

BACKGROUND

In general, an electrode in a layered structure composed of a cathode and an anode to

which an oxide ion conductive electrolyte based on yttria-stabilized zirconia (YSZ) is applied

is used in a solid oxide electrolytic cell (SOEC) stack as in a fuel cell.

Since carbon dioxide and water are electrochemically decomposed to generate a

synthetic gas, that is, a gas having CO and H 2 as main ingredients in the cathode, and the

reaction occurs well at a high temperature of 800°C or higher due to structural charactersitics

and a high temperature of the electrode and chemical charactersitcs of the electrode and the

electrolytic material, a device configuration for preheating fuel and the air necessary for the

reaction, evenly supplying the preheated fuel and air to the electrode, and discharging the

generated gas is required.

In the case of an SOEC stack applicable to a co-electrolysis system, a distribution

technique for evenly supplying high-temperature reaction gases to the electrode has been

developed in order to secure electrode efficiency for enhancing the efficiency of making of a

synthetic gas from water (steam) and carbon dioxide and to develop techniques related to an

SOEC stack module, and a certain level of performance improvement has been achieved as a

result. However, this technique is used for configuration of a single SOEC stack module.

Although there is an example in which a plurality of modules is designed as a single

block, the entire block needs to be redesigned or previously designed modules need to be

connected in parallel to be used in order to increase the number of modules, and thus piping for

connecting blocks becomes complicated. Accordingly, human resources and a substantial

period for design/review are required in the case of a method of redesigning the entire block,

and a reaction gas supply pipe needs to be connected to each module, and thus, a device

becomes complicated in the case of a plurality of modules being connected in parallel to be

used.

Particularly, high temperature supply gases and separation of cooled discharge gases

after reaction are required in the case of the SOEC stack because the SOEC stack needs to

maintain a high operating temperature, but it is difficult to disconnect connected pipes and

perform insulation due to spatial restriction in the case of devices connected through pipes.

Furthermore, when a single SOEC stack module is damaged, the corresponding block needs to

be dissembled and then inspected. Accordingly, the operation needs to be performed after the

entire system is turned off, and thus, a lot of time is consumed and the process is expensive.

SUMMARY

Embodiments of the present disclosure provide a gas transfer module and a gas transfer

module assembly of a co-electrolysis system for expanding a stack module.

In accordance with a first embodiment of the present disclosure, there is provided a gas

transfer module of a co-electrolysis system, comprising: a bottom block including a plurality of

connecting parts for connection of a cell stack, and a bottom passage part disposed inside of the

bottom block to connect the plurality of connecting parts; a wall block perpendicularly connected to an edge portion of one side of the bottom block and including a wall passage part disposed inside of the wall block to be perpendicularly connected to an end portion of the bottom passage part; and a pressing elastic member mounted to the connecting parts such that the cell stack is pressed against the connecting parts.

The wall passage part may include: an air supply passage through which air is supplied;

and a gas supply passage through which a reaction gas is supplied, and wherein the bottom

passage part may include: a supplied air transfer passage for guiding the air supplied from the

air supply passage to the cell stack, one end of the supplied air transfer passage being connected

to the air supply passage and the other end being connected to the connecting parts; and a

reaction gas transfer passage for guiding the reaction gas supplied from the gas supply passage

to the cell stack, one end of the reaction gas transfer passage being connected to the gas supply

passage and the other end being connected to the connecting parts.

The bottom passage part may include: a discharged air transfer passage for guiding air

discharged from the cell stack to the wall passage part, one end of the discharged air transfer

passage being connected to the connecting parts; and a synthetic gas transfer passage for

guiding a synthetic gas discharged from the cell stack to the wall passage part, one end of the

synthetic gas transfer passage being connected to the connecting parts, and the wall passage

part may include: an air discharge passage for receiving the air from the discharged air transfer

passage and discharging the air to the outside of the wall block, one end of the air discharge

passage being connected to the other end of the discharged air transfer passage; and a synthetic

gas discharge passage for receiving the synthetic gas from the synthetic gas transfer passage

and discharging the synthetic gas to the outside of the wall block, one end of the synthetic gas

discharge passage being connected to the other end of the synthetic gas transfer passage.

The wall block may include another connecting part disposed at an end of the wall

passage part in the wall block to connect the wall passage part and another wall passage part, and the pressing elastic member may be provided in the another connecting part such that the wall passage part and the another wall passage part are pressed against each other when the wall passage part and the another wall passage part are connected.

The pressing elastic member may include: a coil elastic part formed to vertically

expand in a coil shape to provide elastic force; a coil convex part protruding from an upper part

of the coil elastic part; and a coil concave part recessed into a lower part of the coil elastic part,

the coil convex part being configured to be inserted into the coil concave part. Thecoilconvex

part and the coil concave part may be vertically positioned are pressed against each other when

the coil elastic part is pressed.

In accordance with a second embodiment of the present disclosure, there is provided a

gas transfer module assembly of a co-electrolysis system, comprising: a plurality of gas transfer

modules provided to be stacked in a vertical direction; and a fixing device for fixing an

uppermost gas transfer module and a lowermost gas transfer module among the plurality of gas

transfer modules, wherein each of the gas transfer modules includes: a bottom block including

a plurality of connecting parts for connection of a cell stack, and a bottom passage part disposed

inside of the bottom block to connect the plurality of connecting parts; a wall block

perpendicularly connected to an edge portion of one side of the bottom block and including a

wall passage part disposed inside of the wall block to be perpendicularly connected to an end

portion of the bottom passage part; and a pressing elastic member mounted to the connecting

parts such that the cell stack is pressed against the connecting parts.

the coil convex part being configured to be inserted into the coil concave part, wherein the coil

convex part and the coil concave part vertically positioned are pressed against each other when the coil elastic part is pressed.

The fixing device may include: an upper frame covering an upper part of the uppermost

gas transfer module; a fixing block provided on an edge portion of the lowermost gas transfer

module; and a fixing bar connected between an end portion of the upper frame and the fixing

block to fix the plurality of gas transfer modules stacked in the vertical direction.

Embodiments of the present disclosure have the advantages of being able to easily

change SOEC stacks due to assembling of a plurality of gas transfer modules through a simple

combining method, to considerably reduce the time and cost required for maintenance, and to

easily change capacity without an additional design for capacity change because a plurality of

gas transfer modules can be expanded in a stacking manner. Particularly, small- and medium

scale SOEC stacks can be connected in parallel through a simple method and thus can be used

as a large-scale SOEC stack.

In addition, the embodiments of the present disclosure have the advantage of being able

to block a gas leak in a connecting part even when a tolerance of 1 mm or less is generated in

the connecting part in consideration of an allowance rate according to thermal expansion due

to device operation at a high temperature by providing a pressing gas flow blocking structure

(pressing elastic member) in the connecting part in order to prevent a gas leak.

Furthermore, the embodiments of the present disclosure have the advantage of being

able to control factors causing problems that may occur in smooth dissembling and recombining

operations because a connecting part is hardly deformed even when cooled after high

temperature operation and to secure high-efficiency reaction conditions because a reaction

temperature can be maintained by separating a high-temperature gas supply part from a gas

supply part cooled after reaction.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a perspective view of a gas transfer module of a co-electrolysis system

according to an embodiment of the present disclosure.

FIG. 2 is a perspective view illustrating cell stacks that are assembled into the gas

transfer module of the co-electrolysis system according to the embodiment of the present

disclosure.

FIG. 3 is a plan view illustrating an internal configuration of the gas transfer module

of the co-electrolysis system according to the embodiment of the present disclosure.

FIG. 4 is a state diagram illustrating a state in which a pressing elastic member is

applied to a joint part in the gas transfer module of the co-electrolysis system according to the

embodiment of the present disclosure.

FIG. 5 is a state diagram illustrating a pressed state of the pressing elastic member in

the gas transfer module of the co-electrolysis system according to the embodiment of the present

disclosure.

FIG. 6 is a state diagram enlarging and illustrating the pressed state of the pressing

elastic member in the gas transfer module of the co-electrolysis system according to the

embodiment of the present disclosure.

FIG. 7 is a perspective view illustrating the gas transfer module of assembly a co

electrolysis system according to the embodiment of the present disclosure.

DETAILED DESCRIPTION

Hereinafter, specific embodiments for implementing the technical spirit of the present

disclosure will be described with reference to the accompanying drawings.

In describing the embodiments of the present disclosure, the detailed descriptions of

well-known functions or configurations will be omitted if it is determined that the detailed descriptions of well-known functions or configurations may unnecessarily make obscure the spirit of the present disclosure.

When an element is referred to as being 'connected' to, 'supported' by, 'accessed' by, or

'supplied' to, 'transferred' to, or 'contacted' with another element, it should be understood that

the element may be directly connected to, supported by, accessed by, or supplied to, transferred

to, or contacted with the other element, but that other elements may exist in the middle.

The terms used in the present disclosure are only used for describing specific

embodiments, and are not intended to limit the present disclosure. Singular expressions

include plural expressions unless the context clearly indicates otherwise.

In addition, in the present disclosure, expressions such as an upper side, a lower side,

and a side surface are described with reference to the drawings, and it should be noted in

advance that if the direction of the object is changed, it may be expressed differently. For the

same reason, some components in the accompanying drawings are exaggerated, omitted, or

schematically illustrated, and the size of each component does not entirely reflect the actual

size.

The terms used herein, including ordinal numbers such as "first" and "second" may be

used to describe, and not to limit, various components. The terms simply distinguish the

components from one another.

The meaning of "including" as used in the specification specifies a specific

characteristic, region, integer, step, action, element and/or component, but does not exclude the

existence or addition of other specific characteristic, region, integer, step, action, element,

component and/or group.

Hereinafter, specific configurations of a gas transfer module and a gas transfer module

assembly of a co-electrolysis system according to an embodiment of the present invention will

be described with reference to FIG. 1 to FIG. 7.

FIG. 1 is a perspective view of the gas transfer module of the co-electrolysis system

according to the embodiment of the present disclosure, FIG. 2 is a perspective view illustrating

cell stacks that are assembled into the gas transfer module of the co-electrolysis system

according to the embodiment of the present disclosure, FIG. 3 is a plan view illustrating an

internal configuration of the gas transfer module of the co-electrolysis system according to the

embodiment of the present disclosure, FIG. 4 is a state diagram illustrating a state in which a

pressing elastic member is applied to a joint part in the gas transfer module of the co-electrolysis

system according to the embodiment of the present disclosure, FIG. 5 is a state diagram

illustrating a pressed state of the pressing elastic member in the gas transfer module of the co

electrolysis system according to the embodiment of the present disclosure, and FIG. 6 is a state

diagram enlarging and illustrating the pressed state of the pressing elastic member in the gas

disclosure.

As illustrated in FIGS. 1 to 6, in the gas transfer module 10 of the co-electrolysis system

according to the embodiment of the present invention, insulation can be easily achieved by

forming passages through which the air or gases can flow in blocks.

Prior to detailed description of the gas transfer module 10, the co-electrolysis system

to which the gas transfer module 10 of the present disclosure is applied is operated at a high

temperature and composed of a plurality of gas supply devices, and a heat supply device and a

plurality of heat exchangers for waste heat recovery to improve thermal energy efficiency can

be used therefor. In addition, the co-electrolysis system may be divided into a high

temperature section including a combustion device, an SOEC stack (cell stack), a reformer, a

steam generator, a heat exchanger, etc. and a room temperature section including fuel, air, and

a water supply device. The high temperature section may be manufactured in a hot-box form

for minimization of thermal loss. This co-electrolysis system has a configuration corresponding to a conventional co-electrolysis system to which C02 co-electrolysis technique is applied, and thus detailed description thereof is omitted.

The gas transfer module 10 may provide passages for supplying the air and a reaction

gas (e.g., CO2 to which steam has been added) to a cell stack 30 and passages for discharging

the air and a synthetic gas discharged from the cell stack 30 to the outside. A plurality of cell

stacks 30 may be mounted on the gas transfer module 10.

More specifically, the gas transfer module 10 may include a bottom block 100, a wall

block 200, and a pressing elastic member 300. The bottom block 100 may form the bottom

of the gas transfer module 10. A plurality of cell stacks 30 may be mounted on the bottom

block 100. For connection with the cell stacks 30, a plurality of connecting parts 120 for

connecting the cell stacks 30 may be provided on the bottom block 100.

The connecting parts 120 may be provided at connection parts of the bottom block 100

to which the cell stacks 30 will be connected. Each connecting part 120 may include a

connecting recess 122 and a connecting protrusion 121. The connecting recess 122 may be a

stepped recess provided at the connection part of any one of the cell stack 30 and the bottom

block 100. The connecting protrusion 121 may be a protrusion provided at the connection

part of the other of the cell stack 30 and the bottom block 100. The connecting recess 122 and

the connecting protrusion 121 may be pressed against and combined with each other having the

pressing elastic member 300 therebetween.

Although the connecting recess 122 and the connecting protrusion 121 are described

as components of the cell stack 30 or the bottom block 100 in the present embodiment, the

present disclosure is not limited thereto and the connecting recess 122 and the connecting

protrusion 121 may separate components that may be provided at a connection part between

the cell stack 30 and the bottom block 100.

A bottom passage part 110 connecting the connecting parts 120 may be included in the bottom block 100. The bottom passage part 110 may include a supplied air transfer passage

111, a reaction gas transfer passage 112, a discharged air transfer passage 113, and a synthetic

gas transfer passage 114.

The supplied air transfer passage 111 of the bottom passage part 110 may guide the air

supplied from an air supply passage 211 to the cell stack 30. One end of the supplied air

transfer passage 111 may be connected to the air supply passage 211 and the other end of the

supplied air transfer passage 111 may be connected to the connecting part 120. Further, the

reaction gas transfer passage 112 may guide a reaction gas supplied from a gas supply passage

212 to the cell stack 30. One end of the reaction gas transfer passage 112 may be connected

to the gas supply passage 212 and the other end of the reaction gas transfer passage 112 may be

connected to the connecting part 120.

In addition, the discharged air transfer passage 113 may guide the air discharged from

the cell stack 30 to a wall passage part 210. One end of the discharged air transfer passage

113 may be connected to the connecting part 120 and the other end of the discharged air transfer

passage 113 may be connected to an air discharge passage 213 of the wall passage part 210.

Further, the synthetic gas transfer passage 114 may guide a synthetic gas discharged from the

cell stack 30 to the wall passage part 210. One end of the synthetic gas transfer passage 114

may be connected to the connecting part 120 and the other end of the synthetic gas transfer

passage 114 may be connected to a synthetic gas discharge passage 214 of the wall passage part

210.

The bottom block 100 may include an insulator 130 for insulating the air supply

passage 211 and the gas supply passage 212 from the air discharge passage 213 and the gas

discharge passage 214.

The wall block 200 may forma sidewall of the gas transfer module 10. Forexample,

the wall block 200 may be perpendicularly connected to the edge of one side of the bottom block 100. The connecting part 120 formed at the end of the wall passage part 210 may be provided in the wall block 200 for connection between different wall passage parts 210.

The connecting part 120 may be provided at a connection part between different wall

passage parts 210 when different wall blocks 200 are vertically stacked. The connecting part

120 may include the connecting recess 122 and the connecting protrusion 121. The

connecting recess 122 may be a stepped recess provided at the connection part of any one of

different wall passage parts 210. The connecting protrusion 121 maybe a protrusion provided

at the connection part of the other of the different wall passage parts 210. The connecting

recess 122 and the connecting protrusion 121 may be pressed against and combined with each

other having the pressing elastic member 300 therebetween.

In addition, the wall passage part 210 perpendicularly connected to the end of the

bottom passage part 110 may be included inside the wall block 200. The wall passage part

210 may include the air supply passage 211, the gas supply passage 212, the air discharge

passage 213, and the synthetic gas discharge passage 214.

The air supply passage 211 may be vertically extended in the wall block 200 positioned

on one side of the bottom block 100 such that the air is supplied therethrough. Thegassupply

passage 212 may be vertically extended in the wall block 200 positioned on one side of the

bottom block 100 such that a reaction gas is supplied therethrough. The air supply passage

211 and the gas supply passage 212 may be separately formed side by side in the wall block

200 positioned on one side of the bottom block 100.

The air discharge passage 213 may be vertically extended in the wall block 200

positioned on the other side of the bottom block 100. The air may be supplied to the air

discharge passage 213 from the discharged air transfer passage 113 and discharged to the

outside of the wall block 200 through the air discharge passage 213. One end of the air

discharge passage 213 may be connected to the other end of the discharged air transfer passage

113.

The synthetic gas discharge passage 214 may be vertically extended in the wall block

200 positioned on the other side of the bottom block 100. A synthetic gas maybe supplied to

the synthetic gas discharge passage 214 from the synthetic gas transfer passage 114 and

discharged to the outside of the wall block 200 through the synthetic gas discharge passage 214.

One end of the synthetic gas discharge passage 214 may be connected to the other end of the

synthetic gas transfer passage 114. The air discharge passage 213 and the synthetic gas

discharge passage 214 may be separately formed side by side in the wall block 200 positioned

on the other side of the bottom block 100.

The pressing elastic member 300 may connect connection parts between the bottom

block 100 and the cell stack 30 such that the connection parts are pressed when the bottom

block 100 and the cell stack 30 are connected through the connecting part 120. Further, the

pressing elastic member 300 may connect connection parts between different wall passage parts

210 such that the connection parts are pressed when the different wall passage parts 210 are

connected through the connecting part 120 in a case in which different wall blocks 200 are

vertically stacked.

To this end, the pressing elastic member 300 may include a coil elastic part 310, a coil

convex part 320, and a coil concave part 330. The coil elastic part 310 may be formed to

vertically extend in a coil shape to provide elastic force. The coil elastic part 310 may be

vertically pressed in a state in which it is interposed between the connecting recess 122 and the

connecting protrusion 121 at a connection position when the bottom block 100 and the cell

stack 30 are connected or different wall blocks 200 are stacked.

The coil convex part 320 may be formed to protrude upward from the upper part of the

coil elastic part 310 in the longitudinal direction. The coil convex part 320 maybe inserted

into the coil concave part 330 positioned above the coil convex part 320 when the coil elastic part 310 is vertically pressed. The coil concave part 330 may be formed to be recessed into the lower part of the coil elastic part 310 in the longitudinal direction. The coil convex part

320 positioned under the coil concave part 330 may be inserted into the concave part 300 when

the coil elastic part 310 is vertically pressed.

A width of the lower end portion of the groove of the coil concave part 330 may be

greater than a width of the upper end portion of the projection of the coil convex part 320 so

that the coil convex part 320 is easily inserted into the coil concave part 330 even when the

pressing elastic member 300 is compressed and slightly bent.

In this manner, the pressing elastic member 300 can effectively block gas leak

occurring at a connection part because the coil convex part 320 and the coil concave part 330

are closely combined with each other while the coil elastic part 310 is pressed when the bottom

block 100 and the cell stack 30 are connected or different wall blocks 200 are vertically stacked.

Further, a packing ring may be provided in a first gap formed by the connecting recess

122, the connecting protrusion 121 and a lowermost porton of the pressing elastic member 300,

and a second gap formed by the connecting recess 122, the connecting protrusion 121 and an

uppermost porton of the pressing elastic member 300. A packing ring maybe made of metal,

e.g., copper so that the packing ring endures the operating temperature (e.g. about 800°C) of

the co-electrolysis system. With the packing ring, it is possible to more reliably prevent a gas

leak in the co-electrolysis system.

Meanwhile, the above-described gas transfer module 10 may provide a gas transfer

module assembly extendable in all directions. The gas transfer module assembly may provide

a structure in which a stack module is easily expanded.

FIG. 7 is a perspective view illustrating the gas transfer module assembly of the co

electrolysis system according to the embodiment of the present disclosure.

As illustrated in FIG. 7, the gas transfer module assembly of the co-electrolysis system according to the embodiment of the present disclosure may include a plurality of vertically stacked gas transfer modules 10 and a fixing device 20 for fixing the plurality of gas transfer modules 10.

The gas transfer module assembly of the co-electrolysis system according to the

embodiment of the present disclosure differs from the above-described embodiment in that the

plurality of gas transfer modules 10 is fixed through the fixing device 20, and thus differences

will be mainly described and the same description and reference signs will be cited.

The fixing device 20 may include upper frames 21, fixing blocks 22, fixing bars 23,

and fixing pieces 24. A plurality of upper frames 21 maybe provided to cover the upper part

of the uppermost gas transfer module 10a. The plurality of upper frames 21 maybe separately

disposed in the longitudinal direction of the gas transfer modules 10. The upper end portions

of the fixing bars 23 may be fixed to both ends of the upper frames 21 through the fixing pieces

24.

The fixing blocks 22 may be provided on the side of the lowermost gas transfer module

z. The lower end portions of the fixing bars 23 maybe connected to the fixing blocks 22.

The upper end portions and the lower end portions of the fixing bars 23 are combined with the

upper frames 21 and the fixing blocks 22 such that the fixing device 20 can bind the gas transfer

modules 10 positioned between the uppermost gas transfer module 1Oa and the lowermost gas

transfer module 1Oz.

Although a plurality of vertically stacked gas transfer modules 10 is assembled as a gas

transfer module assembly through the fixing device 10 in the present embodiment, a plurality

of gas transfer modules 10 may be expanded in various directions other than the vertical

direction. In this manner, a plurality of gas transfer modules 10 can be expanded in a stacking

manner, and thus capacity can be easily changed without additional design for capacity change.

As described above, the present embodiment has the advantages of being able to easily change SOEC stacks due to assembling of a plurality of gas transfer modules through a simple combining method, to considerably reduce the time and cost required for maintenance, to easily change capacity without an additional design for capacity change because a plurality of gas transfer modules can be expanded in a stacking manner, and to block gas leak in a connecting part even when a tolerance is generated in the connecting part in consideration of an allowance rate according to thermal expansion due to device operation at a high temperature by providing a pressing gas flow blocking structure for preventing gas leak according to a pressing method.

The examples of the present disclosure have been described above as specific

embodiments, but these are only examples, and the present disclosure is not limited thereto, and

should be construed as having the widest scope according to the technical spirit disclosed in the

present specification. A person skilled in the art may combine/substitute the disclosed

embodiments to implement a pattern of a shape that is not disclosed, but it also does not depart

from the scope of the present disclosure. In addition, those skilled in the art can easily change

or modify the disclosed embodiments based on the present specification, and it is clear that such

changes or modifications also belong to the scope of the present disclosure.

Claims

CLAIMS:

1. A gas transfer module of a co-electrolysis system, comprising:

a bottom block including a plurality of connecting parts for connection of a cell stack,

and a bottom passage part disposed inside of the bottom block to connect the plurality of

connecting parts;

a wall block perpendicularly connected to an edge portion of one side of the bottom

block and including a wall passage part disposed inside of the wall block to be perpendicularly

connected to an end portion of the bottom passage part; and

a pressing elastic member mounted to the connecting parts such that the cell stack is

pressed against the connecting parts.

2. The gas transfer module of claim 1, wherein the wall passage part includes: an air

supply passage through which air is supplied; and a gas supply passage through which a reaction

gas is supplied, and

wherein the bottom passage part includes: a supplied air transfer passage for guiding

the air supplied from the air supply passage to the cell stack, one end of the supplied air transfer

passage being connected to the air supply passage and the other end being connected to the

connecting parts; and a reaction gas transfer passage for guiding the reaction gas supplied from

the gas supply passage to the cell stack, one end of the reaction gas transfer passage being

connected to the gas supply passage and the other end being connected to the connecting parts.

3. The gas transfer module of claim 2, wherein the bottom passage part includes: a

discharged air transfer passage for guiding air discharged from the cell stack to the wall passage

part, one end of the discharged air transfer passage being connected to the connecting parts; and a synthetic gas transfer passage for guiding a synthetic gas discharged from the cell stack to the wall passage part, one end of the synthetic gas transfer passage being connected to the connecting parts, and wherein the wall passage part includes: an air discharge passage for receiving the air from the discharged air transfer passage and discharging the air to the outside of the wall block, one end of the air discharge passage being connected to the other end of the discharged air transfer passage; and a synthetic gas discharge passage for receiving the synthetic gas from the synthetic gas transfer passage and discharging the synthetic gas to the outside of the wall block, one end of the synthetic gas discharge passage being connected to the other end of the synthetic gas transfer passage.

4. The gas transfer module of claims I to 3, wherein the wall block includes another

connecting part disposed at an end of the wall passage part in the wall block to connect the wall

passage part and another wall passage part, and

wherein the pressing elastic member is provided in the another connecting part such that

the wall passage part and the another wall passage part are pressed against each other when the

wall passage part and the another wall passage part are connected.

5. The gas transfer module of claim 4, wherein the pressing elastic member includes: a coil

elastic part formed to vertically expand in a coil shape to provide elastic force; a coil convex part

protruding from an upper part of the coil elastic part; and a coil concave part recessed into a

lower part of the coil elastic part, the coil convex part being configured to be inserted into the

coil concave part, and

wherein the coil convex part and the coil concave part vertically positioned are pressed

against each other when the coil elastic part is pressed.

6. A gas transfer module assembly of a co-electrolysis system, comprising:

a plurality of gas transfer modules provided to be stacked in a vertical direction; and

a fixing device for fixing an uppermost gas transfer module and a lowermost gas

transfer module among the plurality of gas transfer modules,

wherein each of the gas transfer modules includes:

connecting parts;

connected to an end portion of the bottom passage part; and

pressed against the connecting parts.

7. The gas transfer module assembly of claim 6, wherein the pressing elastic member

includes: a coil elastic part formed to vertically expand in a coil shape to provide elastic force;

a coil convex part protruding from an upper part of the coil elastic part; and a coil concave part

recessed into a lower part of the coil elastic part, the coil convex part being configured to be

inserted into the coil concave part, and

against each other when the coil elastic part is pressed.

8. The gas transfer module assembly of claim 6, wherein the fixing device includes:

an upper frame covering an upper part of the uppermost gas transfer module;

a fixing block provided on an edge portion of the lowermost gas transfer module; and a fixing bar connected between an end portion of the upper frame and the fixing block to fix the plurality of gas transfer modules stacked in the vertical direction.

Institute for Advanced Engineering

Patent Attorneys for the Applicant/Nominated Person

SPRUSON&FERGUSON