CA2859848A1 - Electrolysis device with feed water circuit - Google Patents
Electrolysis device with feed water circuit Download PDFInfo
- Publication number
- CA2859848A1 CA2859848A1 CA2859848A CA2859848A CA2859848A1 CA 2859848 A1 CA2859848 A1 CA 2859848A1 CA 2859848 A CA2859848 A CA 2859848A CA 2859848 A CA2859848 A CA 2859848A CA 2859848 A1 CA2859848 A1 CA 2859848A1
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- CA
- Canada
- Prior art keywords
- branch
- water
- electrolyser
- electrolysis device
- pump
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B1/00—Electrolytic production of inorganic compounds or non-metals
- C25B1/01—Products
- C25B1/02—Hydrogen or oxygen
- C25B1/04—Hydrogen or oxygen by electrolysis of water
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B15/00—Operating or servicing cells
- C25B15/02—Process control or regulation
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B15/00—Operating or servicing cells
- C25B15/08—Supplying or removing reactants or electrolytes; Regeneration of electrolytes
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B9/00—Cells or assemblies of cells; Constructional parts of cells; Assemblies of constructional parts, e.g. electrode-diaphragm assemblies; Process-related cell features
- C25B9/17—Cells comprising dimensionally-stable non-movable electrodes; Assemblies of constructional parts thereof
- C25B9/19—Cells comprising dimensionally-stable non-movable electrodes; Assemblies of constructional parts thereof with diaphragms
- C25B9/23—Cells comprising dimensionally-stable non-movable electrodes; Assemblies of constructional parts thereof with diaphragms comprising ion-exchange membranes in or on which electrode material is embedded
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/36—Hydrogen production from non-carbon containing sources, e.g. by water electrolysis
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Automation & Control Theory (AREA)
- Inorganic Chemistry (AREA)
- Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
Abstract
The invention relates to an electrolysis device (7) having a water circuit (6) in which an electrolyzer (5), a collecting container (1) and at least one pump (2) are arranged, wherein the water is pumped out of the collecting container (1) to the electrolyzer (5) by means of the at least one pump (2), wherein the water circuit (6) branches into at least one first branch (8) and a second branch (9) parallel to the first branch (8), wherein the electrolyzer (5) is arranged in the first branch (8) and wherein a heat exchanger (3) is arranged in the second branch (9) to cool the water.
Description
ELECTROLYSIS DEVICE
The invention relates to an electrolysis device according to the features specified in the preamble of claim 1.
Electrolysis devices which use an electrolyser for the electrolytic decomposition of water into hydrogen and oxygen are known from the state of the art. In a water circuit of such an electrolysis device, thereby water from a collection container is fed to the electrolyser by way of a pump. Then hydrogen exits out of the electrolyser at one side and this hydrogen is led away in a targeted manner. An oxygen-water mixture exits at the other side and this is fed again to the connection container, in which a gas-water separation is then effected. All components of the electrolysis device, i.e. the collection container, the pump, a heat exchanger for heat discharge, a filter and the electrolyser or electrolysis stack are installed in series with configurations known from the state of the art, so that a single water flow flows through all these components.
There are different types of electrolysers; amongst others the so-called acid or proton exchange membrane electrolyser (PEM) which comprises a proton-permeable polymer membrane and therefore can only operate with distilled water, since this would otherwise be damaged.
On operation of the electrolysis device, hereby, the pump used for feeding the water to the electrolyser represents a limiting factor, since on account of the distilled water which is used in the circuit and which is extremely aggressive, only pumps lined with plastic instead of stainless steel can be used. These pumps, however, can only be operated with temperatures up to maximal 80 C, which is a problem due to the already above-mentioned series arrangement of the components of the electrolysis device. As already mentioned, with the known configuration the water is pumped around in the circuit. Since the applied centrifugal pumps are difficult to bleed, their position in the water circuit is usefully directly downstream of the collection container for gas-water separation, into which however the water lead away from the electrolyser and greatly heated by this is directly introduced. Thus
The invention relates to an electrolysis device according to the features specified in the preamble of claim 1.
Electrolysis devices which use an electrolyser for the electrolytic decomposition of water into hydrogen and oxygen are known from the state of the art. In a water circuit of such an electrolysis device, thereby water from a collection container is fed to the electrolyser by way of a pump. Then hydrogen exits out of the electrolyser at one side and this hydrogen is led away in a targeted manner. An oxygen-water mixture exits at the other side and this is fed again to the connection container, in which a gas-water separation is then effected. All components of the electrolysis device, i.e. the collection container, the pump, a heat exchanger for heat discharge, a filter and the electrolyser or electrolysis stack are installed in series with configurations known from the state of the art, so that a single water flow flows through all these components.
There are different types of electrolysers; amongst others the so-called acid or proton exchange membrane electrolyser (PEM) which comprises a proton-permeable polymer membrane and therefore can only operate with distilled water, since this would otherwise be damaged.
On operation of the electrolysis device, hereby, the pump used for feeding the water to the electrolyser represents a limiting factor, since on account of the distilled water which is used in the circuit and which is extremely aggressive, only pumps lined with plastic instead of stainless steel can be used. These pumps, however, can only be operated with temperatures up to maximal 80 C, which is a problem due to the already above-mentioned series arrangement of the components of the electrolysis device. As already mentioned, with the known configuration the water is pumped around in the circuit. Since the applied centrifugal pumps are difficult to bleed, their position in the water circuit is usefully directly downstream of the collection container for gas-water separation, into which however the water lead away from the electrolyser and greatly heated by this is directly introduced. Thus
2 this construction has the disadvantage that the temperature-sensitive pump is subjected to a very high water temperature.
Also, it is not possible to connect a heat exchanger for cooling the water heated by the electrolyser, directly downstream of this electrolyser, due to the high share of gas bubbles in the water which is led away from the electrolyser. In contrast, the heat exchanger in the configurations known form the state of the art is arranged downstream of the pump, which however in turn leads to the disadvantage that the water fed to the electrolyser is cooled by the heat exchanger, by which means the efficiency of the electrolyser as well as its power reduces.
It is therefore an object of the present invention, to provide an electrolysis device which at least partly avoids these disadvantages.
This object is achieved by an electrolysis device according to claim 1.
Advantageous further developments of the invention are specified in the dependent claims and the subsequent description.
According to the invention, an electrolysis device with a water circuit (cycle) is provided, in which an electrolyser, a collection container, and at least one pump are arranged, wherein the water is pumped by way of the at least one pump out of the collection container to the electrolyser, wherein the water circuit is branched into at least one first branch and into a second branch which is parallel to the first branch, wherein the electrolyser is arranged in the first branch and wherein a heat exchanger for cooling the water is arranged in the second branch.
The basic concept of the present invention is not to cool the water flow fed to the electrolyser, but to let the cooling be effected in an auxiliary flow. In this manner, on the one hand the maximal temperature permissible for the operation of the pump can be utilised and on the other hand the electrolyser can be fed with water at this temperature, which increases the efficiency. The cooling is effected in the auxiliary flow and therefore has no direct influence on the electrolysis process.
Also, it is not possible to connect a heat exchanger for cooling the water heated by the electrolyser, directly downstream of this electrolyser, due to the high share of gas bubbles in the water which is led away from the electrolyser. In contrast, the heat exchanger in the configurations known form the state of the art is arranged downstream of the pump, which however in turn leads to the disadvantage that the water fed to the electrolyser is cooled by the heat exchanger, by which means the efficiency of the electrolyser as well as its power reduces.
It is therefore an object of the present invention, to provide an electrolysis device which at least partly avoids these disadvantages.
This object is achieved by an electrolysis device according to claim 1.
Advantageous further developments of the invention are specified in the dependent claims and the subsequent description.
According to the invention, an electrolysis device with a water circuit (cycle) is provided, in which an electrolyser, a collection container, and at least one pump are arranged, wherein the water is pumped by way of the at least one pump out of the collection container to the electrolyser, wherein the water circuit is branched into at least one first branch and into a second branch which is parallel to the first branch, wherein the electrolyser is arranged in the first branch and wherein a heat exchanger for cooling the water is arranged in the second branch.
The basic concept of the present invention is not to cool the water flow fed to the electrolyser, but to let the cooling be effected in an auxiliary flow. In this manner, on the one hand the maximal temperature permissible for the operation of the pump can be utilised and on the other hand the electrolyser can be fed with water at this temperature, which increases the efficiency. The cooling is effected in the auxiliary flow and therefore has no direct influence on the electrolysis process.
3 According to a preferred embodiment, the water circuit, downstream of the at least one pump branches into the at least one first branch and the second branch. This circuit arrangement has the advantage that the circulation of the water in both branches can be effected with only one pump.
Advantageously, the first branch comprises a first return, which runs out into the collection container.
Moreover, it is advantageous if the second branch has a second return which runs out into the collection container.
Preferably, the collection container is designed for gas-water separation.
Particularly preferably, the electrolyser is a proton-exchange-membrane electrolyser.
According to a further preferred embodiment, the water of the water circuit in the second branch is pumped out of the collection container to the heat exchanger by way of a further pump.
Moreover, preferably a filter is arranged in the water circuit, in particular in the first branch upstream of the electrolyser.
It is possible on account of the configuration of the electrolysis device according to the invention, to cool the water already before the pump, but simultaneously to supply the electrolyser itself with water having a greater temperature or thus operating it with a higher water temperature, so that the efficiency of the installation can be improved.
The invention is hereinafter described in more detail by way of one embodiment example represented in the drawing. The figure of a schematic representation of a water circuit of an electrolysis device according to one embodiment of the invention is shown.
A water circuit 6 of an electrolysis device 7 according to one embodiment of the invention is represented in the figure. A collection container 1 for the gas-water separation, a pump 2, a
Advantageously, the first branch comprises a first return, which runs out into the collection container.
Moreover, it is advantageous if the second branch has a second return which runs out into the collection container.
Preferably, the collection container is designed for gas-water separation.
Particularly preferably, the electrolyser is a proton-exchange-membrane electrolyser.
According to a further preferred embodiment, the water of the water circuit in the second branch is pumped out of the collection container to the heat exchanger by way of a further pump.
Moreover, preferably a filter is arranged in the water circuit, in particular in the first branch upstream of the electrolyser.
It is possible on account of the configuration of the electrolysis device according to the invention, to cool the water already before the pump, but simultaneously to supply the electrolyser itself with water having a greater temperature or thus operating it with a higher water temperature, so that the efficiency of the installation can be improved.
The invention is hereinafter described in more detail by way of one embodiment example represented in the drawing. The figure of a schematic representation of a water circuit of an electrolysis device according to one embodiment of the invention is shown.
A water circuit 6 of an electrolysis device 7 according to one embodiment of the invention is represented in the figure. A collection container 1 for the gas-water separation, a pump 2, a
4 heat exchanger 2, a filter 4 and an electrolyser 5 for decomposing water into hydrogen and oxygen are arranged in the water circuit 6. With regard to the electrolyser 5, it is the case of a proton-exchange-membrane electrolyser (PEM) and as a result the water circuit 6 is operated with distilled water.
In contrast to the configurations known from the state of the art, with which the collection container 1, the pump 2, the heat exchanger 3, the filter 4 and the electrolyser 5, as already explained, are installed in series, so that only a single water flow flows through all mentioned components, here the water circuit 6 is branched into a first branch 8 and into a second branch 9 which is parallel to the first branch 8. The branching of the water flow pumped by the pump 2 out of the collection container 1 is thereby effected directly downstream or behind the pump 2, or upstream which is to say in front of the filter 4.
The filter 4 and the electrolyser 5 which brings the heat into the water circuit 6 are arranged in the first branch 8. The heat exchanger 2 for cooling the water is located in the second branch 9.
A first return 10 of the first branch 8 and a second return 11 of the second branch 9 run out into the collection container 1 for gas-water separation, in which the water cooled by the heat exchanger 3 and the water heated by the electrolyser 5 now mix. With this, a lower water temperature in the collection container 1 is achieved, in contrast to the configuration which is known from the state of the art and with which only the water heated by the electrolyser 5 runs back into the collection container 1. It is possible without any problem, to use a pump which is lined with plastic, since the water in this manner is cooled already upstream of the pump 2 which pumps the water out of the collection container 1. However, simultaneously the electrolyser 5 can also be operated at a higher operating temperature due to this configuration, and the efficiency and its performance can be increased by way of this.
According to a further embodiment which is not shown here, it is furthermore possible for the first branch 8 as well as the second branch 9 to be supplied in each case by their own pump. Moreover, according to a yet further embodiment, it is possible to divide the water circuit 6 into more than two branches.
List of reference numerals 1 collection container 2 pump 3 heat exchanger 4 filter
In contrast to the configurations known from the state of the art, with which the collection container 1, the pump 2, the heat exchanger 3, the filter 4 and the electrolyser 5, as already explained, are installed in series, so that only a single water flow flows through all mentioned components, here the water circuit 6 is branched into a first branch 8 and into a second branch 9 which is parallel to the first branch 8. The branching of the water flow pumped by the pump 2 out of the collection container 1 is thereby effected directly downstream or behind the pump 2, or upstream which is to say in front of the filter 4.
The filter 4 and the electrolyser 5 which brings the heat into the water circuit 6 are arranged in the first branch 8. The heat exchanger 2 for cooling the water is located in the second branch 9.
A first return 10 of the first branch 8 and a second return 11 of the second branch 9 run out into the collection container 1 for gas-water separation, in which the water cooled by the heat exchanger 3 and the water heated by the electrolyser 5 now mix. With this, a lower water temperature in the collection container 1 is achieved, in contrast to the configuration which is known from the state of the art and with which only the water heated by the electrolyser 5 runs back into the collection container 1. It is possible without any problem, to use a pump which is lined with plastic, since the water in this manner is cooled already upstream of the pump 2 which pumps the water out of the collection container 1. However, simultaneously the electrolyser 5 can also be operated at a higher operating temperature due to this configuration, and the efficiency and its performance can be increased by way of this.
According to a further embodiment which is not shown here, it is furthermore possible for the first branch 8 as well as the second branch 9 to be supplied in each case by their own pump. Moreover, according to a yet further embodiment, it is possible to divide the water circuit 6 into more than two branches.
List of reference numerals 1 collection container 2 pump 3 heat exchanger 4 filter
5 electrolyser
6 water circuit
7 electrolysis device
8 first branch
9 second branch first return 11 second return
Claims (8)
PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. An electrolysis device (7) with a water circuit (6), in which an electrolyser (5), a collection container (1) and at least one pump (2) are arranged, wherein the water is pumped by way of at least one pump (2) out of the collection container (1) to the electrolyser (5), characterised in that the water circuit (6) is branched into at least one first branch (8) and into a second branch (9) which is parallel to the first branch (8), wherein the electrolyser (5) is arranged in the first branch (8) and wherein a heat exchanger (3) for cooling the water is arranged in the second branch (9).
2. An electrolysis device (7) according to claim 1, characterised in that the water circuit (6) branches downstream of the at least one pump (2), into the at least one first branch (8) and the second branch (9).
3. An electrolysis device (7) according to claim 1 or 2, characterised in that the first branch (8) comprises a first return (10) which runs out into the collection container (1).
4. An electrolysis device (7) according to one of the claims 1 to 3, characterised in that the second branch (9) comprises a second return (11) which runs out into the collection container (1).
5. An electrolysis device (7) according to one of the claims 1 to 4, characterised in that the collection container (1) is designed for gas-water separation.
6. An electrolysis device (7) according to one of the claims 1 to 5, characterised in that the electrolyser (5) is a proton-exchange-membrane electrolyser.
7. An electrolysis device (7) according to one of the claims 1 to 6, characterised in that the water of the water circuit (6) in the second branch (9) is pumped by way of a further pump (2) out of the collection container (1) to the heat exchanger (3).
8. An electrolysis device (7) according to one of the claims 1 to 7, characterised in that a filter (4) is arranged in the water circuit (6), in particular in the first branch (8) upstream of the electrolyser (5).
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP12151580.3A EP2617873B1 (en) | 2012-01-18 | 2012-01-18 | Electrolysis device |
| EP12151580.3 | 2012-01-18 | ||
| PCT/EP2012/076047 WO2013107589A1 (en) | 2012-01-18 | 2012-12-18 | Electrolysis device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2859848A1 true CA2859848A1 (en) | 2013-07-25 |
| CA2859848C CA2859848C (en) | 2021-05-04 |
Family
ID=47520945
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA2859848A Active CA2859848C (en) | 2012-01-18 | 2012-12-18 | Electrolysis device with feed water circuit |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US20150021170A1 (en) |
| EP (1) | EP2617873B1 (en) |
| JP (1) | JP2015508457A (en) |
| KR (1) | KR20140113959A (en) |
| CN (1) | CN104126030A (en) |
| CA (1) | CA2859848C (en) |
| WO (1) | WO2013107589A1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3615711B1 (en) * | 2017-04-24 | 2023-01-18 | Hoeller Electrolyzer GmbH | Method for operating a water electrolysis device |
| CN110127089B (en) * | 2019-05-10 | 2021-02-05 | 北京控制工程研究所 | Water-based propulsion system and method applied to high-orbit satellite |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3758392A (en) * | 1971-05-03 | 1973-09-11 | Carus Corp | Quinone continuous recycle process for electrolytic conversion of benzene to |
| DE2529036A1 (en) * | 1975-06-28 | 1977-01-20 | Francisco Pacheco | Hydrogen generation in electrolytic cell - esp. for prodn. of fuel for motor vehicles, and industrial uses |
| US6569298B2 (en) * | 2000-06-05 | 2003-05-27 | Walter Roberto Merida-Donis | Apparatus for integrated water deionization, electrolytic hydrogen production, and electrochemical power generation |
| KR100803016B1 (en) * | 2003-05-19 | 2008-02-14 | 더 프록터 앤드 갬블 캄파니 | Compositions, devices and methods for stabilizing and increasing the efficacy of halogen dioxide solutions |
| DE102004026281A1 (en) * | 2004-05-28 | 2005-12-22 | Lengeling, Gregor, Dipl.-Ing. | Solar powered electrolyzer for generating hydrogen and method of operating such |
| US8685224B2 (en) * | 2009-09-04 | 2014-04-01 | Innovative Energy Systems And Design, Llc | Method and apparatus for hydrogen generation |
-
2012
- 2012-01-18 EP EP12151580.3A patent/EP2617873B1/en active Active
- 2012-12-18 US US14/373,090 patent/US20150021170A1/en not_active Abandoned
- 2012-12-18 CA CA2859848A patent/CA2859848C/en active Active
- 2012-12-18 JP JP2014552549A patent/JP2015508457A/en active Pending
- 2012-12-18 KR KR1020147020098A patent/KR20140113959A/en not_active Application Discontinuation
- 2012-12-18 WO PCT/EP2012/076047 patent/WO2013107589A1/en active Application Filing
- 2012-12-18 CN CN201280067442.7A patent/CN104126030A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| US20150021170A1 (en) | 2015-01-22 |
| EP2617873B1 (en) | 2014-06-25 |
| EP2617873A1 (en) | 2013-07-24 |
| CN104126030A (en) | 2014-10-29 |
| CA2859848C (en) | 2021-05-04 |
| JP2015508457A (en) | 2015-03-19 |
| KR20140113959A (en) | 2014-09-25 |
| WO2013107589A1 (en) | 2013-07-25 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request |
Effective date: 20171212 |