CN114606509A - Heat management system and method for hydrogen production electrolytic cell array - Google Patents
Heat management system and method for hydrogen production electrolytic cell array Download PDFInfo
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- CN114606509A CN114606509A CN202111211141.4A CN202111211141A CN114606509A CN 114606509 A CN114606509 A CN 114606509A CN 202111211141 A CN202111211141 A CN 202111211141A CN 114606509 A CN114606509 A CN 114606509A
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- 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
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- 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
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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
- C25B15/00—Operating or servicing cells
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- C25B15/021—Process control or regulation of heating or cooling
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
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- C25B15/00—Operating or servicing cells
- C25B15/02—Process control or regulation
- C25B15/023—Measuring, analysing or testing during electrolytic production
- C25B15/025—Measuring, analysing or testing during electrolytic production of electrolyte parameters
- C25B15/027—Temperature
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- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
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- C25B15/00—Operating or servicing cells
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- C25B15/083—Separating products
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- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
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- C25B15/00—Operating or servicing cells
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- C25B15/087—Recycling of electrolyte to electrochemical cell
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- 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
- C25B9/67—Heating or cooling means
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- 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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Abstract
The invention discloses a heat management system and a heat management method for a hydrogen production electrolytic cell array, wherein the system comprises a plurality of electrolytic cells connected in parallel, a hydrogen outlet end and an oxygen outlet end of each electrolytic cell are respectively connected with a hydrogen side gas-liquid separator and an oxygen side gas-liquid separator, a liquid outlet of the hydrogen side gas-liquid separator and a liquid outlet of the oxygen side gas-liquid separator are connected in parallel and then connected with one end of a first heat exchange channel of a heat exchanger, the other end of the first heat exchange channel is connected with a liquid inlet of a first one-way valve, two ends of a second heat exchange channel of the heat exchanger are connected into a heat exchange loop, a liquid outlet of the first one-way valve is connected with one end of a heater, the other end of the heater is connected with a plurality of second one-way valves connected in parallel through an alkali liquor circulating pump, each second one-way valve is connected into the liquid inlet of one electrolytic cell in a matched manner, and an alkali liquor supplement branch is arranged between the liquid outlet of the first one-way valve and the heater. The invention has the beneficial effects that: greatly reduces the starting time of the electrolytic cell array and improves the quick response of the system.
Description
Technical Field
The invention relates to the technical field of new energy, in particular to a thermal management system and method for a hydrogen production electrolytic cell array.
Background
Wind power generation is an important way to realize renewable energy utilization and promote carbon neutralization and carbon peaking. However, large-scale wind farms are prone to generate huge wind curtailment energy, resulting in a decrease in energy utilization. The technology for producing hydrogen by using electrolyzed water can convert the abandoned wind resource into green hydrogen energy, not only can improve the economic benefit of a wind power plant, but also can promote the development of the hydrogen energy industry, and particularly promotes the application of a hydrogen fuel cell in the traffic field.
The alkaline water electrolysis hydrogen production technology is one of the most mature hydrogen production schemes with the lowest cost. For a large-scale wind power plant, the generated power fluctuation is large, and the randomness is strong, so that the adoption of the parallel connection of a plurality of alkaline hydrogen production electrolytic cells not only can improve the hydrogen production scale and the wide power fluctuation adaptability of a hydrogen production system, but also can improve the instantaneous response capability, the comprehensive efficiency and the service life of the hydrogen production system, such as:
chinese patent CN 111364052A proposes that a plurality of electrolytic cells are connected in parallel to reduce the lower limit of hydrogen production power of an electrolytic system, thereby widening the operation range of the hydrogen production power of the electrolytic system and enabling the electrolytic system to be suitable for fluctuating power supply occasions such as wind power generation or photovoltaic power generation and the like;
chinese patent CN 111826669A proposes a large-scale water electrolysis hydrogen production system with wide power fluctuation adaptability and a control method, a plurality of electrolysis baths are connected in parallel to form a hydrogen production module, each module forms a large-scale hydrogen production system, and a module power shunt controller respectively controls the power of each module, thereby improving the hydrogen production energy consumption efficiency and the wide power fluctuation adaptability, enhancing the instantaneous response speed and reducing the power loading cost;
chinese patent CN 112103994A proposes a prediction management method for an electrolytic cell array for hydrogen production by water electrolysis, and reasonably distributes the running power and running time of each electrolytic cell through a rotation strategy so as to balance the service life of each electrolytic cell;
in summary, although the prior patent mentions that the electrolytic cell array is adopted to improve the operation efficiency, the wide power fluctuation adaptability and the response time of the large-scale renewable energy hydrogen production system, each electrolytic cell generates considerable heat in the operation process, and obviously, the prior art cannot provide a specific comprehensive heat management method to recycle the heat generated by the electrolytic cell.
Disclosure of Invention
In order to solve the problems, the invention provides a heat management system and a heat management method for a hydrogen production electrolytic cell array, and aims to further improve the comprehensive efficiency of the system by utilizing the heat generated by the electrolytic cell in the operation process.
In order to solve the technical problems, the invention provides a heat management system for a hydrogen production electrolytic cell array in a first aspect, which comprises a plurality of electrolytic cells connected in parallel, wherein a hydrogen outlet end and an oxygen outlet end of each electrolytic cell are respectively connected with a hydrogen side gas-liquid separator and an oxygen side gas-liquid separator, a liquid outlet of the hydrogen side gas-liquid separator and a liquid outlet of the oxygen side gas-liquid separator are connected in parallel and then connected with one end of a first heat exchange channel of a heat exchanger, the other end of the first heat exchange channel is connected with a liquid inlet of a first one-way valve, two ends of a second heat exchange channel of the heat exchanger are connected into a heat exchange loop, a liquid outlet of the first one-way valve is connected with one end of a heater, the other end of the heater is connected with a plurality of second one-way valves connected in parallel through an alkali liquor circulating pump, each second one-way valve is connected with a liquid inlet of one electrolytic cell in a matching manner, and an alkali liquor replenishing branch is arranged between the liquid outlet of the first one-way valve and the heater.
In some embodiments, the heat exchange loop comprises a heat exchange pipeline and a heat exchange pump installed at any section of the heat exchange pipeline, and part of the heat exchange pipeline is installed inside the heat storage tank.
In some embodiments, the lye supplement branch comprises a lye storage tank and a lye supplement pump installed at an outlet end of the lye storage tank, and an outlet end of the lye supplement pump is installed between a liquid outlet of the first check valve and the heater.
In some embodiments, the second one-way valve is a one-way regulator valve.
In a second aspect, the present invention provides a method for thermal management of an array of hydrogen-producing electrolysis cells, for use in the above system, comprising the steps of: detecting whether the temperature of the alkali liquor at the outlet end of the alkali liquor circulating pump is lower than a preset threshold value, if so, entering a cold start mode, otherwise, determining the running number of the electrolytic cells according to the wind power required to be consumed currently, and selecting to enter a low-power mode or a high-power mode according to the interval in which the number falls.
In some embodiments, the cold start mode comprises: and determining the running number of the electrolytic cells according to the current wind power required to be consumed, opening the second one-way valves with corresponding number according to the running number of the electrolytic cells, and starting the alkali supplement pump, the alkali liquor circulating pump, the heater and the heat exchange pump.
In some embodiments, the low power mode comprises: and opening corresponding number of the second one-way valves according to the running number of the electrolytic cells, starting the alkali supplement pump, the alkali liquor circulating pump and the heat exchange pump, and closing the heater.
In some embodiments, the high power mode comprises: and opening corresponding number of the second one-way valves according to the running number of the electrolytic cells, and starting the alkali supplement pump, the alkali liquor circulating pump, the heat exchange pump and the heater.
In some embodiments, during the operation of the electrolytic cell, it is continuously detected whether the temperature of the alkali liquor at the outlet end of the alkali liquor circulating pump is higher than the preset threshold value, and if so, the heater is turned off.
In some embodiments, during the operation of the electrolytic cell, it is continuously detected whether the temperature of the alkali liquor at the outlet end of the alkali liquor circulating pump is higher than the temperature of the alkali liquor stored in the heat storage tank and lower than the preset threshold value, and if so, the heat exchange pump is turned off.
The invention has the beneficial effects that: the liquid discharge ports of the hydrogen side gas-liquid separator and the oxygen side gas-liquid separator are provided with the heat exchanger and the heat exchange loop for absorbing heat of alkali liquor, reducing the temperature of the alkali liquor of the system and keeping the best electrolysis effect, and meanwhile, the heater is arranged at the liquid discharge port of the first one-way valve, so that the starting time of an electrolytic cell array can be greatly shortened, and the quick response of the system is improved.
Drawings
FIG. 1 is a schematic structural diagram of a thermal management system for a hydrogen production electrolyzer array as disclosed in an embodiment of the invention;
wherein: the method comprises the following steps of 1-an electrolytic bath, 2-a hydrogen side gas-liquid separator, 3-an oxygen side gas-liquid separator, 4-a heat exchanger, 5-a first one-way valve, 6-a heat exchange loop, 7-a heater, 8-an alkali liquor circulating pump, 9-a second one-way valve, 10-an alkali liquor supplementing branch, 61-a heat exchange pipeline, 62-a heat exchange pump, 63-a heat storage tank, 101-an alkali liquor storage tank, 102-an alkali supplementing pump, 11-a direct current converter and 12-a direct current bus.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer and clearer, the following detailed description of the present invention is provided with reference to the accompanying drawings and detailed description. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some but not all of the relevant aspects of the present invention are shown in the drawings.
Example one
The embodiment provides a thermal management system for a hydrogen production electrolytic cell array, as shown in fig. 1, comprising a plurality of electrolytic cells 1 connected in parallel, wherein a hydrogen outlet end and an oxygen outlet end of each electrolytic cell 1 are respectively connected with a hydrogen side gas-liquid separator 2 and an oxygen side gas-liquid separator 3, a liquid outlet of the hydrogen side gas-liquid separator 2 and a liquid outlet of the oxygen side gas-liquid separator 3 are connected in parallel and then connected with one end of a first heat exchange channel of a heat exchanger 4, the other end of the first heat exchange channel is connected with a liquid inlet of a first one-way valve 5, two ends of a second heat exchange channel of the heat exchanger 4 are connected into a heat exchange loop 6, a liquid outlet of the first one-way valve 5 is connected with one end of a heater 7, the other end of the heater 7 is connected with a plurality of second one-way valves 9 connected in parallel through an alkali liquor circulating pump 8, each second one-way valve 9 is connected into a liquid inlet of one electrolytic cell 1 in a matching manner, and an alkali liquor replenishing branch 10 is arranged between the liquid outlet of the first one-way valve 5 and the heater 7.
The alkaline water electrolysis hydrogen production electrolytic cell array consists of n (n is more than or equal to 2) electrolytic cells 1 connected in parallel, the rated power of each electrolytic cell 1 can be the same or different, and the hydrogen production of each electrolytic cell 1 can be optimally controlled according to the efficiency in actual operation. Specifically, the electrolytic cell 1 is in the operable power range, the electrolytic efficiency of the electrolytic cell is in the descending trend along with the increase of the electrolytic power, therefore, the electrolytic cell array formed by connecting a plurality of electrolytic cells 1 in parallel can reduce the minimum electrolytic power of the system and enhance the wide power fluctuation of the system, and can convert the high power instruction of a single electrolytic cell 1 into the low power instruction of a plurality of electrolytic cells to improve the efficiency of the electrolytic system.
In order to achieve an independent control of the individual electrolysis cells 1, each electrolysis cell 1 is supplied with current from a dc converter 11 adapted to its nominal power, the individual dc converters 11 being connected to a dc bus 12. Specifically, the electrolysis power of each electrolytic cell 1 can be realized by controlling the current value of the dc converter 11 in accordance with the hydrogen production amount; the hydrogen and oxygen generated by each electrolytic cell 1 are respectively collected to the hydrogen side gas-liquid separator 2 and the oxygen side gas-liquid separator 3 through one-way valves, the alkali liquor in the gas is separated out through the separators and flows back to an alkali liquor circulating pipeline (the direction of a first heat exchange channel of the heat exchanger 4), and the hydrogen and oxygen are sent to a subsequent processing device for drying, purification, cooling and other processing.
The flow rate of the alkali liquor in each electrolytic cell 1 can be controlled by the second one-way valve 9 connected thereto, so that the respective electrolytic cells 1 share one alkali liquor circulating pump 8, and the pumping pressure of the alkali liquor circulating pump 8 can be controlled by the input voltage thereof. The alkali liquor separated out from the hydrogen side gas-liquid separator 2 and the oxygen side gas-liquid separator 3 can flow back to the electrolytic tank together with the alkali liquor stored in the alkali liquor supplementing branch 10, and when the temperature of the alkali liquor in the system does not meet the requirement, heat exchange can be carried out through the heat management system.
The heat exchange loop 6 may be any heat exchange assembly that can be connected to the heat exchanger 4, and an alternative embodiment is provided in this embodiment, that is, the heat exchange loop 6 includes a heat exchange pipe 61 and a heat exchange pump 62 installed at any section of the heat exchange pipe 61, and a part of the heat exchange pipe 61 is installed inside the heat storage tank 63. The heat exchange loop 6 is used for cooling the alkali solution precipitated from the hydrogen-side gas-liquid separator 2 and the oxygen-side gas-liquid separator 3, and storing heat in the heat storage tank 63.
The alkali liquor replenishing branch 10 is used for replenishing alkali liquor to the electrolytic cell 1, and preferably, the alkali liquor replenishing branch 10 comprises an alkali liquor storage tank 101 and an alkali replenishing pump 102 installed at an outlet end of the alkali liquor storage tank 101, and an outlet end of the alkali replenishing pump 102 is installed between a liquid outlet of the first check valve 5 and the heater 7.
Furthermore, the second check valve 9 is a check valve.
In the embodiment, the heat exchanger 4 and the heat exchange loop 6 are arranged at the liquid outlet of the hydrogen side gas-liquid separator 2 and the oxygen side gas-liquid separator 3 and used for absorbing heat of alkali liquor, reducing the temperature of the alkali liquor of the system and keeping the best electrolysis effect, and meanwhile, the heater 7 is arranged at the liquid outlet of the first one-way valve 5, so that the starting time of the electrolytic cell array can be greatly shortened, and the quick response of the system is improved. The heating management system can improve the hydrogen production efficiency and response speed in a wide power range through power distribution optimization and hydrogen production waste heat utilization, thereby improving the economic benefit of large-scale wind power hydrogen production.
Example two
A method for thermal management of an array of hydrogen-producing electrolysis cells for use in the system of the first embodiment, comprising the steps of: and detecting whether the temperature of the alkali liquor at the outlet end of the alkali liquor circulating pump 8 is lower than a preset threshold value, if so, entering a cold start mode, otherwise, determining the running number of the electrolytic cells 1 according to the wind power required to be consumed currently, and selecting to enter a low-power mode or a high-power mode according to the interval in which the number falls. The interval is set according to the total design quantity of the electrolytic cell 1, if the current electrolytic cell 1 array has 200 electrolytic cells, the [1, 20] can be selected as a first interval, and the [21, 200] can be selected as a second interval, when only within 20 electrolytic cells 1 work in the early stage of consumption, the low-power mode is selected, otherwise, the high-power mode is selected.
The cold start mode includes: determining the number of the running electrolytic cells 1 according to the wind power required to be consumed currently, opening the second one-way valves 9 with corresponding number according to the number of the running electrolytic cells 1, and starting the alkali supplement pump 102, the alkali liquor circulating pump 8, the heater 7 and the heat exchange pump 62. When only a few of the electrolysis baths 1 work and a plurality of standby electrolysis baths 1 with lower temperature are suddenly started, the alkali liquor can be heated by the heat storage tank 63, so that the temperature of the electrolysis baths 1 to be started is increased, and the starting speed is accelerated.
The low power mode includes: and opening corresponding number of second one-way valves 9 according to the running number of the electrolytic bath 1, starting the alkali supplement pump 102, the alkali liquor circulating pump 8 and the heat exchange pump 62, and closing the heater 7. When the electrolysis power of the system is low, such as only one or a few of the electrolysis cells 1 are operated at low power, the heat generated by the electrolysis cells is insufficient to meet the temperature requirement of the alkali liquor or the electrolysis cells 1 are operated at the optimal efficiency, the heat stored in the heat storage tank 63 can be used for heating the alkali liquor through the heat exchange loop 6.
The high power mode includes: and opening corresponding number of second one-way valves 9 according to the running number of the electrolytic cells 1, and starting the alkali supplement pump 102, the alkali liquor circulating pump 8, the heat exchange pump 62 and the heater 7. When the electrolytic power of the system is large, for example, when the plurality of electrolytic cells 1 are simultaneously operated at high power and the temperature of the circulating alkali liquor is too high, the circulating alkali liquor can be cooled by the heat exchange loop 6, and heat is stored in the heat storage tank 63.
And continuously detecting whether the temperature of the alkali liquor at the outlet end of the alkali liquor circulating pump 8 is higher than a preset threshold value or not in the running process of the electrolytic cell 1, and if so, turning off the heater 7.
And continuously detecting whether the temperature of the alkali liquor at the outlet end of the alkali liquor circulating pump 8 is higher than the temperature of the alkali liquor stored in the heat storage tank 7 and lower than a preset threshold value or not in the running process of the electrolytic cell 1, and if so, closing the heat exchange pump 62. When the heat in the heat storage tank 63 is not enough to heat the alkali liquor to raise the temperature of the electrolytic cell 1 (i.e. the heat in the heat storage tank 63 is not enough to heat the alkali liquor in the main line of the alkali liquor circulating pump 8), the heat exchange pump 62 should be turned off to avoid the heat absorption in the heat storage tank 63, and the heater 7 should continue to heat the alkali liquor in the system. The temperature control system is arranged in the heat storage tank 63, when the temperature of the heat storage tank 63 is too high, the heat medium in the heat storage tank 63 can flow out from the outlet, and the cooling medium is input into the heat storage tank 63 through the inlet to reduce the temperature of the heat storage tank 63, so that the alkali liquor cooling effect is ensured.
In the low-power mode, when the wind power required to be consumed is smaller, only a small number of electrolytic cells 1 and the corresponding second one-way valves 9 are opened, the system stores the heat generated by the operating electrolytic cells 1 in the heat storage tank 63, and when the wind power required to be consumed is increased, the remaining electrolytic cells are started according to the increase of the power, the high-power mode is entered, after the starting number of the electrolytic cells 1 is increased, the flow rate of the alkaline solution is increased, so that the temperature of the alkaline solution in the alkaline solution circulation channel is reduced, at the moment, the heat in the heat storage tank 63 can be used by the thermal management system to quickly heat the alkaline solution circulation channel, so that the opened electrolytic cells 1 are ensured to maintain normal working temperature, the starting electrolytic cells 1 are accelerated to work, and the response time of the system for hydrogen production and power consumption is reduced. In addition, the heater arranged on the alkali liquor circulation path can be used for temporarily heating the alkali liquor, and particularly, when the electrolytic cell array is just started and the temperature of the heat storage tank 63 is too low, the temperature of the alkali liquor can be rapidly increased through the heater 7, so that the quick response of the electrolytic cell 1 is ensured.
Specifically, when only a few of electrolytic cells 1 work and a plurality of standby electrolytic cells with lower temperature are suddenly started, the alkali liquor can be heated by the heater 7, so that the starting time of the electrolytic cell array is greatly shortened, and the quick response of the system is improved.
The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention accordingly, and not to limit the protection scope of the present invention accordingly. All equivalent changes or modifications made in accordance with the spirit of the present disclosure are intended to be covered by the scope of the present disclosure.
Claims (10)
1. A heat management system for a hydrogen production electrolytic cell array is characterized by comprising a plurality of electrolytic cells connected in parallel, wherein a hydrogen outlet end and an oxygen outlet end of each electrolytic cell are respectively connected with a hydrogen side gas-liquid separator and an oxygen side gas-liquid separator, the liquid outlet of the hydrogen side gas-liquid separator and the liquid outlet of the oxygen side gas-liquid separator are connected in parallel and then are connected with one end of a first heat exchange channel of the heat exchanger, the other end of the first heat exchange channel is connected with the liquid inlet of the first one-way valve, the two ends of the second heat exchange channel of the heat exchanger are connected with the heat exchange loop, the liquid outlet of first check valve is connected with one of them end of heater, the other end of heater passes through the alkali lye circulating pump and is connected with a plurality of parallelly connected second check valve, every the second check valve all matches and inserts one the inlet of electrolysis trough, just the liquid outlet of first check valve with be equipped with alkali lye between the heater and supply the branch road.
2. The thermal management system for an array of hydrogen-producing electrolyzers according to claim 1, wherein the heat exchange loop comprises a heat exchange conduit, and a heat exchange pump installed at any section of the heat exchange conduit, and part of the heat exchange conduit is installed inside the heat storage tank.
3. The thermal management system for a hydrogen-producing electrolyzer array of claim 2, wherein the lye supply branch comprises a lye storage tank and a lye make-up pump mounted at an outlet end of the lye storage tank, an outlet end of the lye make-up pump being mounted between the outlet of the first one-way valve and the heater.
4. The thermal management system for a hydrogen-producing electrolyzer array of claim 3 in which the second check valve is a check valve.
5. A method of thermal management for an array of hydrogen-producing cells for use in the system of claim 4, comprising the steps of:
detecting whether the temperature of the alkali liquor at the outlet end of the alkali liquor circulating pump is lower than a preset threshold value, if so, entering a cold start mode, otherwise, determining the running number of the electrolytic cells according to the wind power required to be consumed currently, and selecting to enter a low-power mode or a high-power mode according to the interval in which the number falls.
6. The thermal management system for a hydrogen-producing electrolyzer array of claim 5, wherein the cold start mode comprises: and determining the running number of the electrolytic cells according to the current wind power required to be consumed, opening the second one-way valves with corresponding number according to the running number of the electrolytic cells, starting the alkali supplement pump, the alkali liquor circulating pump and the heater, and closing the heat exchange pump.
7. The thermal management system for a hydrogen-producing electrolyzer array of claim 5, wherein the low power mode comprises: and opening corresponding number of the second one-way valves according to the running number of the electrolytic cells, and starting the alkali supplement pump, the alkali liquor circulating pump, the heat exchange pump and the heater.
8. The thermal management system for a hydrogen-producing electrolyzer array of claim 5, wherein the high power mode comprises: and opening corresponding number of the second one-way valves according to the running number of the electrolytic cells, and starting the alkali supplement pump, the alkali liquor circulating pump, the heat exchange pump and the heater.
9. The thermal management system for an array of hydrogen-producing electrolysis cells according to claim 8, wherein during operation of the electrolysis cell, it is continuously detected whether the temperature of the lye at the outlet end of the lye circulating pump is above the predetermined threshold, and if so, the heater is turned off.
10. The thermal management system for an array of hydrogen-producing electrolysis cells according to claim 8, wherein during operation of the electrolysis cell, it is continuously detected whether the temperature of the lye at the outlet end of the lye circulating pump is higher than the temperature of the lye stored in the heat storage tank and lower than the preset threshold value, and if so, the heat exchange pump is turned off.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114277384A (en) * | 2021-11-19 | 2022-04-05 | 中国华能集团清洁能源技术研究院有限公司 | System for be used for alkaline electrolysis hydrogen plant electrolyte circulation |
| CN114959740A (en) * | 2022-06-16 | 2022-08-30 | 清华四川能源互联网研究院 | Shutdown electrolytic tank heat preservation system for large-scale hydrogen production by alkaline electrolysis of water |
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