CN109306918B - Hot air engine directly using liquid organic hydrogen storage material - Google Patents
Hot air engine directly using liquid organic hydrogen storage material Download PDFInfo
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- CN109306918B CN109306918B CN201811123720.1A CN201811123720A CN109306918B CN 109306918 B CN109306918 B CN 109306918B CN 201811123720 A CN201811123720 A CN 201811123720A CN 109306918 B CN109306918 B CN 109306918B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02G—HOT GAS OR COMBUSTION-PRODUCT POSITIVE-DISPLACEMENT ENGINE PLANTS; USE OF WASTE HEAT OF COMBUSTION ENGINES; NOT OTHERWISE PROVIDED FOR
- F02G1/00—Hot gas positive-displacement engine plants
- F02G1/04—Hot gas positive-displacement engine plants of closed-cycle type
- F02G1/043—Hot gas positive-displacement engine plants of closed-cycle type the engine being operated by expansion and contraction of a mass of working gas which is heated and cooled in one of a plurality of constantly communicating expansible chambers, e.g. Stirling cycle type engines
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02G—HOT GAS OR COMBUSTION-PRODUCT POSITIVE-DISPLACEMENT ENGINE PLANTS; USE OF WASTE HEAT OF COMBUSTION ENGINES; NOT OTHERWISE PROVIDED FOR
- F02G1/00—Hot gas positive-displacement engine plants
- F02G1/04—Hot gas positive-displacement engine plants of closed-cycle type
- F02G1/043—Hot gas positive-displacement engine plants of closed-cycle type the engine being operated by expansion and contraction of a mass of working gas which is heated and cooled in one of a plurality of constantly communicating expansible chambers, e.g. Stirling cycle type engines
- F02G1/044—Hot gas positive-displacement engine plants of closed-cycle type the engine being operated by expansion and contraction of a mass of working gas which is heated and cooled in one of a plurality of constantly communicating expansible chambers, e.g. Stirling cycle type engines having at least two working members, e.g. pistons, delivering power output
- F02G1/0445—Engine plants with combined cycles, e.g. Vuilleumier
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02G—HOT GAS OR COMBUSTION-PRODUCT POSITIVE-DISPLACEMENT ENGINE PLANTS; USE OF WASTE HEAT OF COMBUSTION ENGINES; NOT OTHERWISE PROVIDED FOR
- F02G1/00—Hot gas positive-displacement engine plants
- F02G1/04—Hot gas positive-displacement engine plants of closed-cycle type
- F02G1/043—Hot gas positive-displacement engine plants of closed-cycle type the engine being operated by expansion and contraction of a mass of working gas which is heated and cooled in one of a plurality of constantly communicating expansible chambers, e.g. Stirling cycle type engines
- F02G1/053—Component parts or details
- F02G1/055—Heaters or coolers
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Hydrogen, Water And Hydrids (AREA)
Abstract
The application discloses a hot air engine directly utilizing liquid organic hydrogen storage materials, which comprises a hot end cylinder and a cold end cylinder; a heat regenerator and a dehydrogenation reactor which are connected in sequence are arranged on a pipeline between the hot end cylinder and the cold end cylinder; the hot end cylinder is connected with the inlet end of the heat regenerator; a medium outlet of the dehydrogenation reactor is connected with a cold end cylinder; the hydrogen outlet of the dehydrogenation reactor is communicated with the fuel inlet of the hot air engine. The hot air engine provided by the application can provide a cooling effect for the constant-temperature compression process in the circulation of the hot air engine by utilizing the characteristic that the liquid organic hydrogen storage material absorbs heat through dehydrogenation reaction, overcomes the defect that a large amount of cooling water is used in the prior art, and has a good cooling effect; meanwhile, hydrogen generated by dehydrogenation can be used as fuel of a thermomotor, so that the utilization rate of heat is improved.
Description
Technical Field
The application relates to the technical field of automatic control, in particular to a hot air engine directly utilizing liquid organic hydrogen storage materials.
Background
The heat engine can utilize fuel such as hydrogen, gasoline and diesel oil, and the like, and gas such as hydrogen, nitrogen, helium, air and the like is used as a working medium, and the heat engine works according to the Stirling cycle. The Stirling cycle consists of four reversible processes of isothermal heat absorption, isochoric heat release, isothermal heat release and isochoric heat absorption. In the circulation process of the working medium, heat release to a low-temperature heat source is generally realized through a water circulation cooler during constant-temperature compression, so that the constant-temperature cooling of the working medium is realized through hot gas and a large amount of cooling water in the working process. The hot end working medium temperature of the practical hot air machine is above 400 ℃, and the cold end working medium temperature is not lower than 200 ℃.
The method is characterized in that the dehydrogenation heat absorption characteristic of the liquid organic material and the characteristic that the working medium needs to be cooled in the hot gas working process are combined, a hydrogen fuel hot air engine system which uses the liquid organic hydrogen storage material for hydrogen supply is designed, the working medium in the constant-temperature compression process in the working cycle of the hot air engine is used for heating and dehydrogenating the liquid organic hydrogen storage material dehydrogenation reactor, meanwhile, the characteristic that the dehydrogenation reaction of the liquid organic hydrogen storage material absorbs heat is used for cooling the working medium, hydrogen generated by the dehydrogenation reactor provides fuel for the hot air engine, the heat utilization rate of the hot air engine is improved, and the cooling water requirement of the hot air engine is reduced.
Disclosure of Invention
The application provides a heat engine of directly utilizing liquid organic hydrogen storage material utilizes the endothermic characteristics of dehydrogenation of liquid organic hydrogen storage material, for the process of deciding the temperature provides the cooling, has good cooling effect, and simultaneously, the fuel of heat engine can be regarded as to the hydrogen that the dehydrogenation produced, has improved heat engine heat utilization ratio.
The application provides a hot air engine directly utilizing liquid organic hydrogen storage materials, which comprises a hot end cylinder and a cold end cylinder; a heat regenerator and a dehydrogenation reactor which are connected in sequence are arranged on a pipeline between the hot end cylinder and the cold end cylinder; the hot end cylinder is connected with the inlet end of the heat regenerator; the medium outlet of the dehydrogenation reactor is connected with the cold end cylinder; and the hydrogen outlet of the dehydrogenation reactor is communicated with the fuel inlet of the thermomotor.
Optionally, the heat engine further includes a cooler, and the cooler is located between the heat regenerator and the dehydrogenation reactor.
Optionally, the heat engine further comprises a cooler, and the cooler is located between the dehydrogenation reactor and the cold end cylinder.
Optionally, the dehydrogenation reactor is connected with a combustion waste gas discharge pipeline, and a preheater is arranged in the combustion waste gas discharge pipeline.
Optionally, the hot end cylinder and the cold end cylinder are respectively provided with two groups, and a pipeline formed by sequentially connecting the heat regenerator, the cooler and the dehydrogenation reactor is arranged between each group of the hot end cylinder and the cold end cylinder.
Optionally, the hot air engine uses hydrogen or a mixture of hydrogen and other combustible gas or combustible liquid as fuel.
The embodiment of the application provides a hot air engine directly utilizing liquid organic hydrogen storage materials, which comprises a hot end cylinder and a cold end cylinder; a heat regenerator and a dehydrogenation reactor which are connected in sequence are arranged on a pipeline between the hot end cylinder and the cold end cylinder; the hot end cylinder is connected with the inlet end of the heat regenerator; the medium outlet of the dehydrogenation reactor is connected with the cold end cylinder; and the hydrogen outlet of the dehydrogenation reactor is communicated with the fuel inlet of the thermomotor. The hot air engine provided by the application can provide a cooling effect for the constant-temperature compression process in the circulation of the hot air engine by utilizing the characteristic that the liquid organic hydrogen storage material absorbs heat through dehydrogenation reaction, overcomes the defect that a large amount of cooling water is used in the prior art, and has a good cooling effect; meanwhile, hydrogen generated by dehydrogenation can be used as fuel of a thermomotor, so that the utilization rate of heat is improved.
Drawings
In order to more clearly explain the technical solution of the present application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious to those skilled in the art that other drawings can be obtained according to the drawings without any creative effort.
FIG. 1 is a schematic diagram illustrating an embodiment of a gas distribution heat engine utilizing liquid organic hydrogen storage materials directly as provided herein;
FIG. 2 is a schematic diagram illustrating an alternative embodiment of a gas distribution heat engine that directly utilizes a liquid organic hydrogen storage material as provided herein;
FIG. 3 is a schematic block diagram illustrating an embodiment of a gas distribution heat engine utilizing liquid organic hydrogen storage materials directly as provided herein;
FIG. 4 is a schematic block diagram illustrating a fourth embodiment of a dual acting heat engine utilizing liquid organic hydrogen storage materials directly as provided herein;
in the figure, 1-hot end cylinder, 2-cold end cylinder, 3-heat regenerator, 4-cooler and 5-dehydrogenation reactor.
Detailed Description
Example one
Referring to fig. 1, a schematic structural diagram of an embodiment of a gas distribution type heat engine directly using a liquid organic hydrogen storage material is provided;
as can be seen from fig. 1, the present application provides a gas distribution type heat engine directly using liquid organic hydrogen storage material, which includes a hot-end cylinder 1 and a cold-end cylinder 2; a heat regenerator 3 and a dehydrogenation reactor 5 which are connected in sequence are arranged on a pipeline between the hot end cylinder 1 and the cold end cylinder 2; the hot end cylinder 1 is connected with the inlet end of the heat regenerator 3; the medium outlet of the dehydrogenation reactor 5 is connected with the cold end cylinder 2; and a hydrogen outlet of the dehydrogenation reactor 5 is communicated with a fuel inlet of the hot air engine. In this embodiment, the stirling engine further comprises a cooler 4, and the cooler 4 is located between the regenerator 3 and the dehydrogenation reactor 5.
The hot end cylinder 1 is used for outputting a heated working medium, and the working medium in the embodiment can be one or more of hydrogen, nitrogen, helium or air; the cold end cylinder 2 is used for receiving the cooled working medium, raising the temperature of the working medium through a constant temperature compression-constant temperature expansion process and moving the working medium into the hot end cylinder 1; the heat regenerator 3 is used for carrying out constant volume heating and constant volume heat release processes; the cooler 4 and the dehydrogenation reactor 5 are used for cooling working media;
the dehydrogenation reactor 5 is filled with a liquid organic hydrogen storage material and a dehydrogenation catalyst, the liquid organic hydrogen storage material is generally an organic liquid molecule with a plurality of benzene ring structures, the hydrogen absorption process is a process in which hydrogen atoms and unsaturated bonds of the benzene rings are added to generate a saturated cyclohexane structure, the dehydrogenation process is a process in which the saturated cyclohexane structure is subjected to desorption reaction to generate hydrogen and is reduced to the benzene ring structure, and the dehydrogenation reaction is an endothermic reaction. In this embodiment, when the dehydrogenation reactor 5 is heated, the desorption reaction of the internal liquid organic hydrogen storage material occurs under the action of the dehydrogenation catalyst, the working medium is further cooled by utilizing the heat absorption characteristic of the dehydrogenation reaction, and simultaneously, the generated hydrogen is conveyed to the fuel inlet of the heat engine through the gas pipe for combustion of the heat engine.
According to the technical scheme, the working process of the heat engine directly using the liquid organic hydrogen storage material provided by the embodiment is as follows: the heated working medium in the hot end cylinder 1 of the hot end gas engine firstly flows through the heat regenerator 3, heats the heat regenerator 3, then flows through the cooler 4 for cooling, the temperature of the medium cooled in the cooler 4 is required to be reduced to below 300 ℃, then the medium enters the dehydrogenation reactor 5 for further cooling, the cooled working medium flows back to the cold end cylinder 2, meanwhile, hydrogen generated by dehydrogenation reaction is conveyed to a combustion chamber of the hot end gas engine through a pipeline, and one-time circulation is finished.
Optionally, the dehydrogenation reactor is connected with a combustion waste gas discharge pipeline, and a preheater is arranged in the combustion waste gas discharge pipeline. The preheater is not shown in the figure, and the organic liquid hydrogen storage material is preheated by the preheater before entering the dehydrogenation reactor 5, so that the dehydrogenation reaction rate can be improved, and the cooling effect and the hydrogen yield can be increased.
Optionally, the hot air engine uses hydrogen or a mixture of hydrogen and other combustible gas or combustible liquid as fuel. Because the dehydrogenation product generates a certain amount of hydrogen, the hydrogen is hardly required to be supplemented during the operation of the device, and the consumption of gas is reduced.
According to the technical scheme, the hot air engine directly using the liquid organic hydrogen storage material comprises a hot end cylinder 1 and a cold end cylinder 2; a heat regenerator 3 and a dehydrogenation reactor 5 which are connected in sequence are arranged on a pipeline between the hot end cylinder 1 and the cold end cylinder 2; the hot end cylinder 1 is connected with the inlet end of the heat regenerator 3; the medium outlet of the dehydrogenation reactor 5 is connected with the cold end cylinder 2; and a hydrogen outlet of the dehydrogenation reactor 5 is communicated with a fuel inlet of the hot air engine. In this embodiment, the stirling engine further comprises a cooler 4, and the cooler 4 is located between the regenerator 3 and the dehydrogenation reactor 5. The hot air engine provided by the application can provide a cooling effect for the constant-temperature compression process in the circulation of the hot air engine by utilizing the characteristic that the liquid organic hydrogen storage material absorbs heat through dehydrogenation reaction, overcomes the defect that a large amount of cooling water is used in the prior art, and has a good cooling effect; meanwhile, hydrogen generated by dehydrogenation can be used as fuel of a thermomotor, so that the utilization rate of heat is improved.
Example two
Referring to fig. 2, a schematic structural diagram of another embodiment of a gas distribution type heat engine directly using a liquid organic hydrogen storage material is provided;
as can be seen from fig. 2, the difference between the second embodiment and the first embodiment is that the cooler 4 is located between the dehydrogenation reactor 5 and the cold end cylinder 2. The functional functions of the other components in the second embodiment are the same as those in the first embodiment, and are not described again here.
In this embodiment, the cooler 4 and the dehydrogenation reactor 5 are replaced, so that the working medium is cooled by the dehydrogenation reactor 5 after heating the heat regenerator 3, the temperature of the working medium can be rapidly reduced to below 300 ℃, meanwhile, the generation amount of hydrogen is increased, the fuel supply of the heat engine is ensured, the working medium cooled by the dehydrogenation reactor 5 enters the cooler 4 for further cooling, and a good cooling effect can be obtained on the premise of not requiring a large amount of cooling water.
EXAMPLE III
Referring to fig. 3, a schematic structural diagram of another embodiment of a gas distribution type heat engine directly using a liquid organic hydrogen storage material is provided;
as can be seen from fig. 3, the third embodiment is different from the first embodiment in that the heat engine does not include the cooler 4. The functional functions of the other components in the third embodiment are the same as those in the first embodiment, and are not described again here.
In the third embodiment, the cooler 4 is removed, and the dehydrogenation reactor 5 replaces the cooler 4 to provide a cooling effect, so that the equipment structure can be simplified, and the cooling efficiency can be improved; meanwhile, due to the effective heat absorption effect of the dehydrogenation reactor 5, the high cooling effect can be completely and independently provided on the premise of reasonably setting technical parameters.
Example four
Referring to fig. 4, a schematic structural diagram of a fourth embodiment of a double-acting heat engine directly using a liquid organic hydrogen storage material is provided;
as can be seen from the figure, two groups of hot end cylinders 1 and two groups of cold end cylinders 2 are respectively arranged, and a pipeline formed by sequentially connecting the heat regenerator 3, the cooler 4 and the dehydrogenation reactor 5 is arranged between each group of hot end cylinders 1 and the cold end cylinders 2.
The embodiment provides a heat engine with double-acting type, which mainly comprises cylinders and equipment connected to pipelines between cold and hot cylinders, in fig. 4, the two cylinders positioned at two sides are double-acting cylinders, the two double-acting cylinders form a basic unit, the upper part of the cylinder is a hot end cylinder, the lower part of the cylinder is a cold end cylinder, and a heat regenerator, a cooler and a dehydrogenation reactor are sequentially installed on the pipeline connected from the hot end cylinder to the cold end cylinder. In the course of the work, the working medium in every pipeline carries to the cold junction cylinder of offside from the hot junction cylinder respectively, and rethread constant volume heating moves to the hot junction cylinder of this side, continues to carry out cooling cycle, and the heat engine that this embodiment provided has higher work efficiency.
Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the invention and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the invention being indicated by the following claims.
It will be understood that the invention is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the invention is limited only by the appended claims.
Claims (3)
1. A hot-air engine directly using liquid organic hydrogen storage material is characterized in that the hot-air engine comprises a hot-end cylinder (1) and a cold-end cylinder (2); a heat regenerator (3) and a dehydrogenation reactor (5) which are connected in sequence are arranged on a pipeline between the hot end cylinder (1) and the cold end cylinder (2); the hot end cylinder (1) is connected with the inlet end of the heat regenerator (3); the medium outlet of the dehydrogenation reactor (5) is connected with the cold end cylinder (2); the hydrogen outlet of the dehydrogenation reactor (5) is communicated with the fuel inlet of the thermomotor; the dehydrogenation reactor (5) is filled with a liquid organic hydrogen storage material and a dehydrogenation catalyst; wherein, the liquid organic hydrogen storage material is an organic liquid molecule with a plurality of benzene ring structures, and the dehydrogenation product is hydrogen; the thermomotor adopts hydrogen generated by dehydrogenation reaction of a dehydrogenation reactor (5) as fuel;
the thermomotor also comprises a cooler (4), wherein the cooler (4) is positioned between the heat regenerator (3) and the dehydrogenation reactor (5);
the hot end cylinder (1) and the cold end cylinder (2) are respectively provided with two groups, a pipeline formed by sequentially connecting the heat regenerator (3), the cooler (4) and the dehydrogenation reactor (5) is arranged between each group of the hot end cylinder (1) and the cold end cylinder (2).
2. The heat engine directly utilizing liquid organic hydrogen storage materials as claimed in claim 1, wherein the dehydrogenation reactor (5) is connected with a combustion waste gas discharge pipeline, and a preheater is arranged in the combustion waste gas discharge pipeline.
3. A heat engine utilizing liquid organic hydrogen storage material directly as claimed in claim 1, wherein the heat engine uses hydrogen gas or mixture of hydrogen gas and other combustible gas and combustible liquid as fuel.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811123720.1A CN109306918B (en) | 2018-09-26 | 2018-09-26 | Hot air engine directly using liquid organic hydrogen storage material |
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| CN201811123720.1A CN109306918B (en) | 2018-09-26 | 2018-09-26 | Hot air engine directly using liquid organic hydrogen storage material |
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| CN109306918A CN109306918A (en) | 2019-02-05 |
| CN109306918B true CN109306918B (en) | 2021-09-21 |
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| CN110841563B (en) * | 2019-11-27 | 2022-04-05 | 云南电网有限责任公司电力科学研究院 | Device and method for dehydrogenation by utilizing tail gas of thermomotor |
| CN114151223B (en) * | 2021-12-28 | 2024-04-26 | 成都中科氢阳能源科技有限公司 | Hydrogen fuel gas-electricity hybrid power system based on liquid organic hydrogen storage and Stirling external combustion engine |
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