CN108754527B - Anti-freezing device for vehicle-mounted hydrogen generator and control method - Google Patents
Anti-freezing device for vehicle-mounted hydrogen generator and control method Download PDFInfo
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- CN108754527B CN108754527B CN201810517600.3A CN201810517600A CN108754527B CN 108754527 B CN108754527 B CN 108754527B CN 201810517600 A CN201810517600 A CN 201810517600A CN 108754527 B CN108754527 B CN 108754527B
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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
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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
- 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
- C25B15/08—Supplying or removing reactants or electrolytes; Regeneration of electrolytes
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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
- C25B9/00—Cells or assemblies of cells; Constructional parts of cells; Assemblies of constructional parts, e.g. electrode-diaphragm assemblies; Process-related cell features
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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
Abstract
An anti-freezing device for a vehicle-mounted hydrogen generator and a control method belong to the field of internal combustion engines. The vehicle-mounted hydrogen generator is connected with the water storage device through a water drainage pipeline and a water supplementing pipeline, and the water drainage pipeline and the water supplementing pipeline are connected in parallel and are respectively controlled by a water drainage electromagnetic valve and a water supplementing pump; the water storage device is provided with a heating device, and the power supply device provides electric power for the vehicle-mounted hydrogen generator and the heating device through a circuit and a circuit h respectively; the hydrogen storage tank, the hydrogen rail and the engine are connected in series; the electric control unit receives a power supply working signal a, a water storage device liquid level position signal b, a water storage device temperature signal c, a hydrogen pressure signal d in the hydrogen storage tank and an electrolyte temperature signal g in the vehicle-mounted hydrogen generator, and controls the water replenishing pump and the drainage electromagnetic valve to be opened and closed respectively through signal lines e and f. The device effectively solves the problem that the vehicle-mounted hydrogen generator can not be normally used in winter.
Description
Technical Field
The invention provides an anti-freezing device for a vehicle-mounted hydrogen generator and a control method, particularly relates to anti-freezing measures and an operation mode of electrolyte of the vehicle-mounted hydrogen generator, and belongs to the field of internal combustion engines.
Background
Hydrogen is a recognized ideal alternative fuel for internal combustion engines. The diffusion speed, flame propagation speed and combustion speed of the hydrogen are all higher than those of gasoline, and the hydrogen has the combustion characteristics of low ignition energy, wide ignition limit and the like, so that the internal combustion engine can be quickly started by utilizing the hydrogen, the combustion duration of the internal combustion engine can be shortened by doping a proper amount of hydrogen during air intake, the thermal efficiency of the internal combustion engine can be effectively improved, and the emission of HC and CO is reduced. In addition, because the combustion limit of the hydrogen is wide and the ignition energy is low, the hydrogen-gasoline mixed fuel engine can smoothly run in a lean combustion mode, the economy of the hydrogen-gasoline mixed fuel engine can be further improved, and the emission is reduced. The researches of evergreen, Wangshou and the like show that the hydrogen-doped gasoline engine can effectively improve the combustion of mixed fuel, improve the thermal efficiency and greatly reduce the emission under the working conditions of cold start, warm-up, idling, small load and the like.
The 'hydrogen mixed fuel automobile' proposed by Beijing university of industry is the first initiative in China, and a set of mixed fuel internal combustion engine electronic control unit (HECU) capable of realizing pure hydrogen starting of an engine, stable transition of the engine after starting, hydrogen doping under a small load working condition and free adjustment of oxygen injection quantity is independently developed. The hydrogen is used for improving the combustion of the gasoline, so that the phenomena of poor emission and oil consumption of the gasoline engine during cold start can be eliminated, the combustion and the emission of the gasoline at low load can be improved, the output power at high load is ensured, and the energy-saving and emission-reducing effects are very obvious. Due to the fact that the existing hydrogenation infrastructure is insufficient, the hydrogen mixed fuel automobile selects the vehicle-mounted hydrogen generator as a source of hydrogen, and the charging pile can supply electric energy to the hydrogen generator and guarantee the supply of the hydrogen by installing the electric automobile charging socket and the AC/DC voltage conversion device on the automobile. The hydrogen generator adopts SPE electrolysis technology to electrolyze pure water to prepare hydrogen, and the prepared hydrogen has high purity, and is safe and reliable. The core component in the SPE electrolytic cell belongs to a membrane electrode, and the proton exchange membrane is H+Channels are provided for evolution of hydrogen gas at the cathode. But the electrolyte in the SPE electrolytic cell can bring irreparable damage to the proton exchange membrane after being frozen at low temperature. Therefore, the hydrogen generator cannot meet the use requirement of the hydrogen mixed fuel automobile under the low temperature condition. Based on the technical scheme, the invention provides an anti-freezing device for a vehicle-mounted hydrogen generator and a control method.
Disclosure of Invention
The invention aims to solve the problem that a proton exchange membrane is damaged due to icing of electrolyte under the conditions of low environmental temperature and normal working temperature of a hydrogen generator, meets the use requirement of a hydrogen mixed fuel automobile under the low environmental temperature, and provides an anti-freezing device and a control method for a vehicle-mounted hydrogen generator. The device can effectively solve the problem of low-temperature use of the vehicle-mounted hydrogen generator, and the service life of the vehicle-mounted hydrogen generator is prolonged.
The invention adopts the following technical scheme:
the system comprises a vehicle-mounted hydrogen generator (1), a drainage electromagnetic valve (2), a water replenishing pump (3) and a water storage device (4), wherein the vehicle-mounted hydrogen generator (1) is connected with the water storage device (4) through a drainage pipeline (10) and a water replenishing pipeline (9), and the drainage pipeline (10) and the water replenishing pipeline (9) are connected in parallel and are respectively controlled by the drainage electromagnetic valve (2) and the water replenishing pump (3); the water storage device (4) is provided with a heating device (5), and the power supply device (6) provides electric power for the vehicle-mounted hydrogen generator (1) and the heating device (5) through a circuit (8) and a circuit h respectively; the vehicle-mounted hydrogen generator (1), the hydrogen storage tank (7) and the engine (12) are connected in series through the hydrogen rail (13); the electronic control unit (11) receives a power supply working signal a, a liquid level position signal b of the water storage device (4), a temperature signal c of the water storage device (4), a hydrogen pressure signal d in the hydrogen storage tank (7) and an electrolyte temperature signal g in the vehicle-mounted hydrogen generator (1), and controls the water replenishing pump (3) and the drainage electromagnetic valve (2) to be opened and closed through signal lines e and f respectively. The electronic control unit (11) is connected with an instrument panel (14) through a signal line, and the instrument panel (14) is responsible for receiving and displaying a liquid level position signal b of the water storage device (4).
The anti-freezing device for the vehicle-mounted hydrogen generator and the control method are characterized in that:
(1) when the pressure P of the hydrogen in the hydrogen storage tank (7) is more than or equal to PLWhen is, PLWhen the hydrogen storage tank meets the lowest pressure value of the normal use of the engine (12), the hydrogen generator (1) is not started. The electronic control unit (11) monitors the state of the electrolyte in the device according to the electrolyte temperature signal g in the vehicle-mounted hydrogen generator (1) when the temperature T of the electrolytee＜TM，TMThe electronic control unit (11) controls the drainage electromagnetic valve (2) to be opened for the set lowest value of the temperature of the electrolyte.
(2) When the pressure P of the hydrogen in the hydrogen storage tank (7) is less than PLWhen the hydrogen generator is started, the vehicle-mounted hydrogen generator (1) is started to produce hydrogen. The electronic control unit (11) monitors the state of the electrolyte in the water storage device (4) through a liquid level position signal b of the water storage device (4) and a temperature signal c of the water storage device (4). When the liquid level is at position ha＜hs，hsAt the set lowest liquid level position, the electronic control unit (11) sends out a low liquid level alarm signal i outwards, and an instrument panel (14) receives and displays an alarm; when h is generateda≥hsAnd the temperature T of the water storage device (4)a＜TNWhen, TNWhen the water replenishing pump (3) is started to work, the temperature of the electrolyte is controlled, and the electronic control unit (11) controls the power supply device (6) to supply power to the heating device (5) so as to heat the electrolyte in the water storage device (4); when h is generateda≥hsAnd Ta≥TNWhen the vehicle-mounted hydrogen generator is used, the electronic control unit (11) controls the water replenishing pump (3) to work, electrolyte in the water storage device (4) is pumped back into the vehicle-mounted hydrogen generator (1) through the water replenishing pipeline (9), and the power supply device (6) supplies power to the vehicle-mounted hydrogen generator (1).
(3) When the pressure P in the hydrogen storage tank (7) is less than PfWhen is, PfThe vehicle-mounted hydrogen generator (1) is always kept in an open state for a set highest hydrogen pressure value in the hydrogen storage tank (7); when P is more than or equal to PfWhen the hydrogen production is stopped, the electronic control unit 11 shuts down the on-board hydrogen generator (1).
The device solves the problem that the vehicle-mounted hydrogen generator can not be normally used under the condition of low temperature, prolongs the service life of the vehicle-mounted hydrogen generator, meets the all-weather use requirement of a hydrogen mixed fuel automobile, and has certain application prospect.
Drawings
FIG. 1 System architecture of the present invention
The numbering in the figures defines:
1. the system comprises a vehicle-mounted hydrogen generator 2, a water discharge electromagnetic valve 3, a water replenishing pump 4, a water storage device 5, a heating device 6, a power supply device 7, a hydrogen storage tank 8, a circuit 9 between a power supply and the vehicle-mounted hydrogen generator (1), a water replenishing pipeline 10, a water discharge pipeline 11, an electronic control unit 12, an engine 13, a hydrogen rail 14, an instrument panel a, a power supply working signal b, a water storage device liquid level position signal c, a water storage device temperature signal d, a hydrogen pressure signal e in the hydrogen storage tank (7), a water pump working signal f, a water discharge electromagnetic valve working signal g, an electrolyte temperature signal h in the vehicle-mounted hydrogen generator (1), a circuit connection i between the heating device (5) and the power supply device (6), and a low liquid level alarm signal
FIG. 2 System flow diagram of the present invention
The specific implementation mode is as follows:
in order to make the operation and control process of the device of the present invention clearer, the operation and control method of the device of the present invention will be described more clearly and completely with reference to the accompanying drawings.
The device of the invention comprises:
the system comprises a vehicle-mounted hydrogen generator (1), a drainage electromagnetic valve (2), a water replenishing pump (3) and a water storage device (4), wherein the vehicle-mounted hydrogen generator (1) is connected with the water storage device (4) through a drainage pipeline (10) and a water replenishing pipeline (9), and the drainage pipeline (10) and the water replenishing pipeline (9) are connected in parallel and are respectively controlled by the drainage electromagnetic valve (2) and the water replenishing pump (3); the water storage device (4) is provided with a heating device (5), and the power supply device (6) provides electric power for the vehicle-mounted hydrogen generator (1) and the heating device (5) through a circuit (8) and a circuit h respectively; the vehicle-mounted hydrogen generator (1), the hydrogen storage tank (7) and the engine (12) are connected in series through the hydrogen rail (13); the electronic control unit (11) receives a power supply working signal a, a liquid level position signal b of the water storage device (4), a temperature signal c of the water storage device (4), a hydrogen pressure signal d in the hydrogen storage tank (7) and an electrolyte temperature signal g in the vehicle-mounted hydrogen generator (1), and controls the water replenishing pump (3) and the drainage electromagnetic valve (2) to be opened and closed through signal lines e and f respectively. The electronic control unit (11) is connected with an instrument panel (14) through a signal line, and the instrument panel (14) is responsible for receiving and displaying a liquid level position signal b of the water storage device (4).
(1) When the pressure P of the hydrogen in the hydrogen storage tank (7) is more than or equal to 3bar (the pressure of the hydrogen sprayed by the air passage is 3-4 bar, so the pressure in the hydrogen storage tank is not less than 3bar), the vehicle-mounted hydrogen generator (1) is not used for preparing the hydrogen. The electronic control unit (11) monitors the state of the electrolyte according to the electrolyte temperature signal g in the vehicle-mounted hydrogen generator (1) when the electrolyte temperature T of the electrolytic cell iseThe temperature of the electrolyte is less than 2 ℃ (the normal working temperature of the hydrogen generator (1) is 0-40 ℃, when the temperature of the electrolyte is lower than 0 ℃, a membrane electrode in the electrolytic cell is frozen and damaged, in order to ensure the performance of the hydrogen generator, the set value is in an interval of 2-5 ℃ higher than the lowest value of the normal working temperature, and the electronic control unit (11) controls the drainage electromagnetic valve (2) to be opened through a signal line f, so that the electrolyte in the electrolytic cell flows into the water storage device (4) through the drainage pipeline (10), and the electrolyte in the electrolytic cell is drained;Tewhen the temperature is more than or equal to 2 ℃, the drainage electromagnetic valve (2) is not opened.
(2) When the hydrogen pressure P in the hydrogen storage tank (7) is less than 3bar, the vehicle-mounted hydrogen generator (1) is used for preparing hydrogen, and all the electrolyte at the moment is stored in the water storage device (4) due to the external low-temperature environment. When the power supply device (6) sends an operating signal a to the electronic control unit (11) to indicate that the hydrogen generator (1) has an external power source, the electronic control unit (11) analyzes the state of the electrolyte in the water storage device (4) through a liquid level position signal b of the water storage device (4) and a temperature signal c of the water storage device (4). When the liquid level is at position haWhen the liquid level is less than 30 percent (when the liquid level is lower than 30 percent, the hydrogen production efficiency is reduced due to insufficient electrolyte in the hydrogen generator (1), the electronic control unit (11) sends a low liquid level alarm signal i to the instrument panel (14) to remind a driver of adding the electrolyte into the water storage device (4); when h is generatedaNot less than 30% and additional water tank temperature TaWhen the temperature is lower than 20 ℃ (the efficient hydrogen production temperature range of the vehicle-mounted hydrogen generator (1) is 20-40 ℃), the electronic control unit (11) controls the power supply device (6) to supply power to the heating device (5) through the circuit h, so that the heating device heats the electrolyte in the water storage device (4); when h is generatedaNot less than 30% and TaWhen the temperature is more than or equal to 20 ℃, the electronic control unit (11) controls the water replenishing pump (3) to work through a signal line e, the electrolyte is pumped back into the vehicle-mounted hydrogen generator (1) through the water replenishing pipeline (9), and at the moment, the electronic control unit (11) controls the power supply device (6) to supply power to the vehicle-mounted hydrogen generator (1) through the circuit (8) to start to prepare hydrogen.
(3) When the pressure P in the hydrogen storage tank (7) is less than 27bar (which is set according to the highest storage pressure of the hydrogen storage tank (7), and the value is set to be 85-95% of the maximum value for safety, and the maximum storage pressure of the hydrogen storage tank in the device is 30bar), the vehicle-mounted hydrogen generator (1) is always in the working mode; when P is more than or equal to 27bar, the electronic control unit (11) controls the power supply device (6) to stop working and stops producing hydrogen.
Claims (1)
1. An anti-freeze apparatus for an on-vehicle hydrogen generator, the apparatus comprising:
the system comprises a vehicle-mounted hydrogen generator (1), a drainage electromagnetic valve (2), a water replenishing pump (3) and a water storage device (4), wherein the vehicle-mounted hydrogen generator (1) is connected with the water storage device (4) through a drainage pipeline (10) and a water replenishing pipeline (9), and the drainage pipeline (10) and the water replenishing pipeline (9) are connected in parallel and are respectively controlled by the drainage electromagnetic valve (2) and the water replenishing pump (3); the water storage device (4) is provided with a heating device (5), and the power supply device (6) provides electric power for the vehicle-mounted hydrogen generator (1) and the heating device (5) through a circuit (8) and a circuit h respectively; the vehicle-mounted hydrogen generator (1), the hydrogen storage tank (7) and the engine (12) are connected in series through the hydrogen rail (13); the electronic control unit (11) receives a power supply working signal a, a liquid level position signal b of the water storage device (4), a temperature signal c of the water storage device (4), a hydrogen pressure signal d in the hydrogen storage tank (7) and an electrolyte temperature signal g in the vehicle-mounted hydrogen generator (1), and controls the water replenishing pump (3) and the drainage electromagnetic valve (2) to be opened and closed through signal lines e and f respectively; the electronic control unit (11) is connected with an instrument panel (14) through a signal line, and the instrument panel (14) is responsible for receiving and displaying a liquid level position signal b of the water storage device (4);
(1) when the pressure P of the hydrogen in the hydrogen storage tank (7) is more than or equal to PLWhen is, PLWhen the hydrogen storage tank meets the lowest pressure value of the normal use of the engine (12), the hydrogen generator (1) is not started at the moment; the electronic control unit (11) monitors the state of the electrolyte in the device according to the electrolyte temperature signal g in the vehicle-mounted hydrogen generator (1) when the temperature T of the electrolytee＜TM，TMThe electronic control unit (11) controls the drainage electromagnetic valve (2) to be opened for a set lowest electrolyte temperature value;
(2) when the pressure P of the hydrogen in the hydrogen storage tank (7) is less than PLWhen in use, the vehicle-mounted hydrogen generator (1) is started to prepare hydrogen; the electronic control unit (11) monitors the liquid state in the water storage device (4) through a liquid level position signal b of the water storage device (4) and a temperature signal c of the water storage device (4); when the liquid level is at position ha＜hs，hsThe electronic control unit (11) sends out a low liquid level alarm signal i at the set lowest liquid level position; when h is generateda≥hsAnd the temperature T of the water storage device (4)a＜TNWhen, TNThe temperature of the electrolyte when the water replenishing pump (3) is started to work is controlled electronicallyThe control unit (11) controls the power supply device (6) to supply power to the heating device (5); when h is generateda≥hsAnd Ta≥TNWhen the hydrogen generator is used, the electronic control unit (11) controls the water replenishing pump (3) to work, electrolyte in the water storage device (4) is pumped back into the vehicle-mounted hydrogen generator (1), and the power supply device (6) supplies power to the vehicle-mounted hydrogen generator (1);
(3) when the pressure P in the hydrogen storage tank (7) is less than PfWhen is, PfThe vehicle-mounted hydrogen generator (1) is always kept in an open state for a set highest hydrogen pressure value in the hydrogen storage tank (7); when P is more than or equal to PfWhen the vehicle-mounted hydrogen generator (1) is turned off, the electronic control unit (11).
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| CN201810517600.3A CN108754527B (en) | 2018-05-25 | 2018-05-25 | Anti-freezing device for vehicle-mounted hydrogen generator and control method |
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| CN201810517600.3A CN108754527B (en) | 2018-05-25 | 2018-05-25 | Anti-freezing device for vehicle-mounted hydrogen generator and control method |
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| CN108754527B true CN108754527B (en) | 2020-02-18 |
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| CN109440127A (en) * | 2018-12-30 | 2019-03-08 | 北京工业大学 | A kind of SPE pure water hydrogen generator and control method with self heating function |
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| CN101956634B (en) * | 2010-09-10 | 2012-05-23 | 北京工业大学 | Device for preparing, storing and feeding vehicle-mounted hydrogen/oxygen and control method thereof |
| CN103867352B (en) * | 2014-04-04 | 2016-07-06 | 山东赛克赛斯氢能源有限公司 | A kind of energy saving combustion supporting vehicle-mounted hydrogen and oxygen generation systems |
| CN104593805A (en) * | 2014-12-27 | 2015-05-06 | 北京工业大学 | Anti-freezing device for vehicle-mounted hydrogen generator |
| CN104791150B (en) * | 2015-03-21 | 2017-07-07 | 北京工业大学 | A kind of low emission environmental protection vehicle-mounted hydrogen production device and control method |
| CN107190277B (en) * | 2017-06-23 | 2019-03-22 | 北京工业大学 | A kind of plug-in vehicle-mounted hydrogen production machine |
| CN107204476B (en) * | 2017-06-23 | 2019-07-12 | 北京工业大学 | A kind of charging hydrogen manufacturing integral system |
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