EP4251785A1 - Solar power installation - Google Patents

Solar power installation

Info

Publication number
EP4251785A1
EP4251785A1 EP20828062.8A EP20828062A EP4251785A1 EP 4251785 A1 EP4251785 A1 EP 4251785A1 EP 20828062 A EP20828062 A EP 20828062A EP 4251785 A1 EP4251785 A1 EP 4251785A1
Authority
EP
European Patent Office
Prior art keywords
electrolyser
solar power
gas
power installation
installation according
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.)
Pending
Application number
EP20828062.8A
Other languages
German (de)
French (fr)
Inventor
Nigel David Lister WILLIAMSON
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Clean Power Hydrogen Group Ltd
Original Assignee
Clean Power Hydrogen Group Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Clean Power Hydrogen Group Ltd filed Critical Clean Power Hydrogen Group Ltd
Publication of EP4251785A1 publication Critical patent/EP4251785A1/en
Pending legal-status Critical Current

Links

Classifications

    • 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
    • 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
    • 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
    • C25B9/60—Constructional parts of cells
    • C25B9/65—Means for supplying current; Electrode connections; Electric inter-cell connections

Definitions

  • This invention relates to a solar power installation for generating gas es such as hydrogen and oxygen by electrolysis using electrical power from so- lar panel arrays.
  • Battery storage is appropriate for static applications up to a certain scale, after which hydrogen is both more economical and more sustainable, and for transportation of stored energy, there is no better medium than hydrogen. This may be done in pressurised cylinders or in cryogenic liquid form.
  • Electrolysers which are typically designed for these environments are housed in containers (of which there may be multiples) or, for larger systems, in purpose-built warehouses, etc. Creating such environments for electrolyser technologies leads to significant cost which could be avoided.
  • DC/DC power conversion technologies are typically required for elec trolyser systems to take the combined electrical outputs from numerous solar panels and convert it to a more usable profile for use by reactor stacks within the system.
  • the resulting power may be taken off by separate cables which feed individual reactor stacks or connected to a bus-bar from which individual reactor stacks could be powered.
  • This type of mixed-gas system allows for reductions (from maximum) in both Voltage and current to occur while remaining efficient in driving the wa- ter decomposition reaction (there being no resistance to the passage of ions from membranes), thereby maximising gas production throughout a wide range of solar power input as the Sun travels through its daily path.
  • a solar power installation according to the invention comprises a pho tovoltaic panel and an electrolyser supplied with electrical power directly from the panel, whereby the electrical power output of the panel is matched to the power requirement of the electrolyser, the electrolyser having a water inlet and a gas outlet connected to gas storage means.
  • One aspect of the invention provides a solar power installation com prising a plurality of groups of photovoltaic panels, each group having a respec tive electrolyser mounted adjacent to the group and supplied with electrical power directly from the group whereby the electrical power output of the panels in the group is matched to the power requirement of the electrolyser, each elec trolyser having an inlet connection from a supply of water and an outlet connec tion to a gas manifold.
  • the electrolyser system comprises a plurality of reactor stacks with minimal balance of plant (BOP) which are directly linked to solar panel arrays, rather than housed together in a building or container, thereby eliminating ex pensive and inefficient DC/DC conversion technology.
  • BOP minimal balance of plant
  • units could be arranged to take advantage of shade provided by the solar ar rays.
  • stacks would be directly electrically linked to an ap-litiste number of solar cells, with the gas thereby produced being provided to downstream purification technologies in ‘bundled’ pipework or manifolded to gether for transmission.
  • Water would be supplied to each stack by any of various means from a controlled quality water supply.
  • electrolysers could be located anywhere in a solar array, but will most likely be placed evenly row-to-row in order to efficiently link gas output lines and to allow easy access for maintenance.
  • Gas output lines could be buried or carried on overhead gantries for safety.
  • a system of this nature would eliminate the need for costly electrical conversion technologies by appropriately scaling electrolyser reactor stacks to match electrical output from solar arrays, such that a row (or partial row) of solar panels would be linked to a reactor stack of appropriate electrical capacity to match the maximum electrical output.
  • electrolysers would be connected by pressure-resistant tub- ing such as stainless steel tube to manifolds of larger diameter which would run the length of the installation to a purification system where the gases may be stored either cryogenically or in pressurised vessels.
  • Such a concept may be used for any of the types of electrolysis cur rently deployed for such energy storage purposes, including proton exchange membrane (PEM), alkaline membrane or mixed gas systems with cryogenic separation technologies.
  • PEM proton exchange membrane
  • alkaline membrane or mixed gas systems with cryogenic separation technologies.
  • trace heating can be installed at each electrolyser, powered by an uninterruptable power supply (UPS) to maintain fluid temperatures at values above those at which water and electrolyte freeze.
  • UPS uninterruptable power supply
  • gas transmission lines which might carry moist gas may be kept at above freezing temperature with trace heating, should such prove nec essary.
  • lines might be buried rather than mounted above ground in order to ensure that they are protected from low temperatures.
  • systems of this design re quire less cooling energy at the height of the day to maintain optimal operating temperatures.
  • Small diameter metal gas lines from the electrolyser stacks might be laid bunched together, arranged in parallel runs, or manifolded into larger diam eter tubes.
  • the small diameter tubes could be mounted in groups on overhead gantries or buried underground. In such ‘tube runs’ a sin gle tube will leave the most distant electrolyser, with additional ones added to run alongside as additional electrolysers’ output gas lines are incorporated into the group.
  • small diameter tubes would be connected at the closest or most accessible point to a larger diameter stainless steel tube which would progressively convey the gas from multiple electrolysers.
  • This tube might be of consistent diameter for its length, or, alternatively, start at the most distant end as a small diameter tube and progressively step up in diameter as electro lyser outlet tubes are progressively added to the manifold.
  • stacks in such a system are located outside, and not en closed in any building or ISO-type container, there is no danger of leaked hy drogen forming a combustible gas pocket. This renders the total system very much safer and less expensive than enclosed systems, as there is a reduced need for leak detection and associated control system technologies.
  • stacks could be designed to make use of the surround ing ambient air temperature for cooling, thereby significantly reducing the power which would otherwise be required for chilling the circulating water or electro lyte. This could be accomplished by numerous means, including using larger surface area cell plates to create external ‘fins’ to passing ambient air.
  • One aspect of the invention provides an installation suitable for use in homesteads and farms and having a single electrolyser unit linked to a panel or panels dimensioned so as to provide matched power for the electrolyser, which is suitably linked to a cryogenic separation unit so as to separate out and store hydrogen for fuelling combustion engines or fuel cells for powering machinery, for example tractors or other farm equipment.
  • Figure 1 is a perspective view of a solar power array with electrolyser system
  • Figure 2 is an enlarged perspective view of the end of one row in the ar ray of Figure 1.
  • the solar array 1 comprises rows of photo voltaic panels 2 directed in conventional manner to receive the maximum amount of solar radiation through the day.
  • Each row has an electrolyser unit 4 located at or adjacent to one end thereof and supplied with electrical power from at least some of the panels in the row such that the power supplied to the electrolyser directly matches the power requirement of the electrolyser without the need for DC/DC conversion.
  • the power re quirements of the electrolyser for the row may be fulfilled by, say, half of the row, with the remaining panels in the row supplying power for other purposes, for example to the grid, or to a further electrolyser provided at the opposite end of the row.
  • the electrolysers may suitably be of the membraneless mixed gas type, the gas outlet of each electrolyser being connected to a gas manifold tube 7 conducting the gases to a gas purification, separation and storage system 8, where the gases are dried by any of a number of technologies before the hy- drogen is separated from oxygen by means of cryogenic treatment to liquefy the oxygen leaving gaseous hydrogen to be drawn off. The oxygen is then sepa rately evaporated and stored for industrial or other use.
  • Suitably purified water is supplied to each electrolyser through a separate supply pipe (not shown) and control of the whole system is via control cabinet 9.
  • the electrolyser unit 4 is electrically con nected to the panels 2 via an electrical connection box 5.
  • a water storage tank 3 is supplied with water from a central supply and in turn delivers water to the electrolyser. Gases exit the electrolyser via a gas outlet tube 6 connected to the gas manifold tube 7, which extends along the ends of the rows in the array.
  • the manifold tube may be constructed so as to increase in diameter from the end remote from the gas purification and separation system 8 to allow for the in creasing gas flow volume as each electrolyser is connected in to it.
  • each electrolyser module (compris ing stack, reservoir, BOP and water provision technology) would be scaled to accommodate 100kW of input power.

Abstract

A solar power installation comprises a photovoltaic panel (2) and an elec- trolyser supplied with electrical power directly from the panel, whereby the elec- trical power output of the panel is matched to the power requirement of the elec- trolyser, the electrolyser having a water inlet and a gas outlet connected to gas storage means. The solar power installation may comprise a plurality of groups of photovoltaic panels (2), each group having a respective electrolyser (4) mounted adjacent to the group and supplied with electrical power directly from the group whereby the electrical power output of the panels in the group is matched to the power requirement of the electrolyser. The or each electrolyser (4) has an inlet connection from a supply of water and an outlet connection (6) to a gas manifold (7).

Description

SOLAR POWER INSTALLATION
Field of the Invention
[0001] This invention relates to a solar power installation for generating gas es such as hydrogen and oxygen by electrolysis using electrical power from so- lar panel arrays.
Background to the Invention
[0002] Most electrolyser systems for the generation of hydrogen from water in countries where vast tracts of land are available for power generation and energy storage, are powered either by solar arrays or by wind turbines. In hot- ter climates, the arid land is often unproductive for agriculture, but ideal for solar installations, the output of which, being cyclical, should be stored by one of two means - batteries or hydrogen.
[0003] Battery storage is appropriate for static applications up to a certain scale, after which hydrogen is both more economical and more sustainable, and for transportation of stored energy, there is no better medium than hydrogen. This may be done in pressurised cylinders or in cryogenic liquid form.
[0004] Electrolysers which are typically designed for these environments are housed in containers (of which there may be multiples) or, for larger systems, in purpose-built warehouses, etc. Creating such environments for electrolyser technologies leads to significant cost which could be avoided.
[0005] Additionally, such systems are typically powered by expensive and complex voltage and current control technologies which can amount to 30% of the total system cost, and introduce a significant level of end-to-end inefficiency when associated power factors are considered. [0006] DC/DC power conversion technologies are typically required for elec trolyser systems to take the combined electrical outputs from numerous solar panels and convert it to a more usable profile for use by reactor stacks within the system. [0007] The resulting power may be taken off by separate cables which feed individual reactor stacks or connected to a bus-bar from which individual reactor stacks could be powered.
[0008] Both options require significant control technologies to allow distribu- tion of the power to the reactor stacks within a system. High-current switching devices may be deployed to isolate or connect individual reactor stacks where bus-bar technology is used. Alternatively, a complex control system is required to distribute power to separate groups of cables in installations where reactor stacks are separately powered through dedicated cables. [0009] Such systems are required to interpret the input power and convert it to usable output power for the reactor stacks within the system, resulting in a complex and expensive power delivery system.
[0010] Many reactor stacks - particularly those which make use of mem branes to separate the gases at the point of generation - require their power to be supplied within a relatively small range, outside of which their efficiency re duces significantly. This is because the membranes which separate the gases offer resistance to the transfer of ions in the water-decomposition reaction. This renders their use in a distributed system less viable, though not by any means unviable. [0011] Where no membrane exists - as in the mixed-gas type of system, a much greater range of power provision may be accommodated in the efficient generation of hydrogen and oxygen.
[0012] This type of mixed-gas system allows for reductions (from maximum) in both Voltage and current to occur while remaining efficient in driving the wa- ter decomposition reaction (there being no resistance to the passage of ions from membranes), thereby maximising gas production throughout a wide range of solar power input as the Sun travels through its daily path.
[0013] Beyond these factors, installations in such regions require substantial cooling systems to prevent thermal run-away. Containment of technologies, whether in ISO containers or purpose-built structures, worsens the situation considerably as they contribute to thermal gain from the influence of the sun. The cost of chilling a system in such circumstances can be substantial, both in capital outlay and in operating cost, with the associated demand for power po tentially being as high as 50% of that required for the electrolysis process. Summary of the Invention
[0014] A solar power installation according to the invention comprises a pho tovoltaic panel and an electrolyser supplied with electrical power directly from the panel, whereby the electrical power output of the panel is matched to the power requirement of the electrolyser, the electrolyser having a water inlet and a gas outlet connected to gas storage means.
[0015] One aspect of the invention provides a solar power installation com prising a plurality of groups of photovoltaic panels, each group having a respec tive electrolyser mounted adjacent to the group and supplied with electrical power directly from the group whereby the electrical power output of the panels in the group is matched to the power requirement of the electrolyser, each elec trolyser having an inlet connection from a supply of water and an outlet connec tion to a gas manifold.
[0016] The electrolyser system comprises a plurality of reactor stacks with minimal balance of plant (BOP) which are directly linked to solar panel arrays, rather than housed together in a building or container, thereby eliminating ex pensive and inefficient DC/DC conversion technology. In such an installation, units could be arranged to take advantage of shade provided by the solar ar rays.
[0017] In such a system, stacks would be directly electrically linked to an ap- propriate number of solar cells, with the gas thereby produced being provided to downstream purification technologies in ‘bundled’ pipework or manifolded to gether for transmission.
[0018] Water would be supplied to each stack by any of various means from a controlled quality water supply. [0019] In such an arrangement, electrolysers could be located anywhere in a solar array, but will most likely be placed evenly row-to-row in order to efficiently link gas output lines and to allow easy access for maintenance.
[0020] Gas output lines could be buried or carried on overhead gantries for safety.
[0021] A system of this nature would eliminate the need for costly electrical conversion technologies by appropriately scaling electrolyser reactor stacks to match electrical output from solar arrays, such that a row (or partial row) of solar panels would be linked to a reactor stack of appropriate electrical capacity to match the maximum electrical output.
[0022] In such installations, some rows or portions of the solar arrays might be linked to electrolyser stacks, while the remainder are used in the normal way to power the grid or other dedicated power-consuming systems.
[0023] Typically, electrolysers would be connected by pressure-resistant tub- ing such as stainless steel tube to manifolds of larger diameter which would run the length of the installation to a purification system where the gases may be stored either cryogenically or in pressurised vessels.
[0024] Such a concept may be used for any of the types of electrolysis cur rently deployed for such energy storage purposes, including proton exchange membrane (PEM), alkaline membrane or mixed gas systems with cryogenic separation technologies.
[0025] Where installations of this concept are to be installed in desert areas, where night-time temperatures can drop to well below 0°C, trace heating can be installed at each electrolyser, powered by an uninterruptable power supply (UPS) to maintain fluid temperatures at values above those at which water and electrolyte freeze.
[0026] Similarly, gas transmission lines which might carry moist gas may be kept at above freezing temperature with trace heating, should such prove nec essary. [0027] In environments where temperatures can fall below freezing, lines might be buried rather than mounted above ground in order to ensure that they are protected from low temperatures.
[0028] Additionally, unlike containerised systems, systems of this design re quire less cooling energy at the height of the day to maintain optimal operating temperatures.
[0029] In most cases, no matter which technology is to be deployed, it is like ly that moisture would be carried on the gas prior to reaching the storage tech nologies which are placed at a distance from the generation technologies. In this case, there may be intermediate technologies which are designed to re move excess moisture. These could include coalescing filters, differential ve locity dash-pots, cyclone tubes or bubbler technologies.
[0030] Small diameter metal gas lines from the electrolyser stacks might be laid bunched together, arranged in parallel runs, or manifolded into larger diam eter tubes. In the former case, the small diameter tubes could be mounted in groups on overhead gantries or buried underground. In such ‘tube runs’ a sin gle tube will leave the most distant electrolyser, with additional ones added to run alongside as additional electrolysers’ output gas lines are incorporated into the group.
[0031] In the latter case, small diameter tubes would be connected at the closest or most accessible point to a larger diameter stainless steel tube which would progressively convey the gas from multiple electrolysers. This tube might be of consistent diameter for its length, or, alternatively, start at the most distant end as a small diameter tube and progressively step up in diameter as electro lyser outlet tubes are progressively added to the manifold.
[0032] As reactor stacks in such a system are located outside, and not en closed in any building or ISO-type container, there is no danger of leaked hy drogen forming a combustible gas pocket. This renders the total system very much safer and less expensive than enclosed systems, as there is a reduced need for leak detection and associated control system technologies. [0033] Additionally, stacks could be designed to make use of the surround ing ambient air temperature for cooling, thereby significantly reducing the power which would otherwise be required for chilling the circulating water or electro lyte. This could be accomplished by numerous means, including using larger surface area cell plates to create external ‘fins’ to passing ambient air.
[0034] One aspect of the invention provides an installation suitable for use in homesteads and farms and having a single electrolyser unit linked to a panel or panels dimensioned so as to provide matched power for the electrolyser, which is suitably linked to a cryogenic separation unit so as to separate out and store hydrogen for fuelling combustion engines or fuel cells for powering machinery, for example tractors or other farm equipment.
Brief Description of the Drawings
[0035] In the drawings, which illustrate an exemplary embodiment of the in vention: Figure 1 is a perspective view of a solar power array with electrolyser system; and
Figure 2 is an enlarged perspective view of the end of one row in the ar ray of Figure 1.
Detailed Description of the Illustrated Embodiment [0036] Referring first to Figure 1 , the solar array 1 comprises rows of photo voltaic panels 2 directed in conventional manner to receive the maximum amount of solar radiation through the day. Each row has an electrolyser unit 4 located at or adjacent to one end thereof and supplied with electrical power from at least some of the panels in the row such that the power supplied to the electrolyser directly matches the power requirement of the electrolyser without the need for DC/DC conversion. Thus, it may be possible for the power re quirements of the electrolyser for the row to be fulfilled by, say, half of the row, with the remaining panels in the row supplying power for other purposes, for example to the grid, or to a further electrolyser provided at the opposite end of the row. [0037] The electrolysers may suitably be of the membraneless mixed gas type, the gas outlet of each electrolyser being connected to a gas manifold tube 7 conducting the gases to a gas purification, separation and storage system 8, where the gases are dried by any of a number of technologies before the hy- drogen is separated from oxygen by means of cryogenic treatment to liquefy the oxygen leaving gaseous hydrogen to be drawn off. The oxygen is then sepa rately evaporated and stored for industrial or other use. Suitably purified water is supplied to each electrolyser through a separate supply pipe (not shown) and control of the whole system is via control cabinet 9. [0038] Referring now to Figure 2, the electrolyser unit 4 is electrically con nected to the panels 2 via an electrical connection box 5. A water storage tank 3 is supplied with water from a central supply and in turn delivers water to the electrolyser. Gases exit the electrolyser via a gas outlet tube 6 connected to the gas manifold tube 7, which extends along the ends of the rows in the array. The manifold tube may be constructed so as to increase in diameter from the end remote from the gas purification and separation system 8 to allow for the in creasing gas flow volume as each electrolyser is connected in to it.
[0039] By way of example, where the maximum power output of a single panel is 1 kW, the electrolyser would be scaled to accommodate 1 kW of input power. Conversely, where the solar installation has a maximum output of 1 MW, divided (e.g.) into 10 rows of 100kW output, each electrolyser module (compris ing stack, reservoir, BOP and water provision technology) would be scaled to accommodate 100kW of input power.

Claims

1. A solar power installation, comprising a photovoltaic panel and an electrolyser supplied with electrical power directly from the panel, whereby the electrical power output of the panel is matched to the power requirement of the electrolyser, the electrolyser having a water inlet and a gas outlet connected to gas storage means.
2. A solar power installation according to Claim 1 , comprising a plu rality of groups of photovoltaic panels, each group having a respective electro lyser mounted adjacent to the group and supplied with electrical power directly from the group whereby the electrical power output of the panels in the group is matched to the power requirement of the electrolyser, each electrolyser having an inlet connection from a supply of water and an outlet connection to a gas manifold connected to gas storage means.
3. A solar power installation according to Claim 2, wherein the groups are in the form of rows of panels with the electrolysers located adjacent to an end of a respective row.
4. A solar power installation according to any preceding claim, wherein the or each electrolyser is a proton exchange membrane electrolyser or an alkaline membrane electrolyser and separate gas outlets are provided for the hydrogen and oxygen produced.
5. A solar power installation according to Claim 1 , 2 or 3, wherein the or each electrolyser is a mixed gas electrolyser and the gas outlet is connected to cryogenic gas separation apparatus.
6. A solar power installation according to Claim 5, wherein the gas outlet is connected to a drying system upstream of the cryogenic gas separation apparatus
7. A solar power installation according to any preceding claim, wherein the or each electrolyser is provided with a reservoir for supply of water thereto.
8. A solar power installation according to Claim 7, wherein the reser voir is connected to a water supply.
9. A solar power installation according to any preceding claim, wherein the or each electrolyser is positioned beneath the adjacent photovoltaic panel whereby the panel shields the electrolyser from direct solar radiation.
10. A solar power installation according to any preceding claim, wherein the or each electrolyser is provided with external heat exchange fins.
EP20828062.8A 2020-11-27 2020-11-27 Solar power installation Pending EP4251785A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/GB2020/053056 WO2022112732A1 (en) 2020-11-27 2020-11-27 Solar power installation

Publications (1)

Publication Number Publication Date
EP4251785A1 true EP4251785A1 (en) 2023-10-04

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Application Number Title Priority Date Filing Date
EP20828062.8A Pending EP4251785A1 (en) 2020-11-27 2020-11-27 Solar power installation

Country Status (3)

Country Link
EP (1) EP4251785A1 (en)
AU (1) AU2020479045A1 (en)
WO (1) WO2022112732A1 (en)

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7510640B2 (en) * 2004-02-18 2009-03-31 General Motors Corporation Method and apparatus for hydrogen generation
WO2007142693A2 (en) * 2005-12-15 2007-12-13 Gm Global Technology Operations, Inc. Optimizing photovoltaic-electrolyzer efficiency
US20070277870A1 (en) * 2006-05-31 2007-12-06 Mark Wechsler Solar hydrogen generation system
AP2015008346A0 (en) * 2012-09-19 2015-04-30 Solar Ship Inc Hydrogen-regenerating solar-powered aircraft
CN106977369B (en) * 2016-12-15 2020-12-01 稳力(广东)科技有限公司 Device and method for combined preparation of methanol and ammonia by comprehensively utilizing electric energy
EP3533905A1 (en) * 2018-03-01 2019-09-04 Shell Internationale Research Maatschappij B.V. Method of configuring a water electrolysis system
WO2020163910A1 (en) * 2019-02-14 2020-08-20 Southern Green Gas Limited Solar-powered water electrolyser

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AU2020479045A1 (en) 2023-06-22

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