CN116358323A - High-pressure helium heat exchange system, heat exchange method and regenerative heat engine system - Google Patents
High-pressure helium heat exchange system, heat exchange method and regenerative heat engine system Download PDFInfo
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- CN116358323A CN116358323A CN202310502506.1A CN202310502506A CN116358323A CN 116358323 A CN116358323 A CN 116358323A CN 202310502506 A CN202310502506 A CN 202310502506A CN 116358323 A CN116358323 A CN 116358323A
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- 239000001307 helium Substances 0.000 title claims abstract description 74
- 229910052734 helium Inorganic materials 0.000 title claims abstract description 74
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 title claims abstract description 74
- 230000001172 regenerating effect Effects 0.000 title claims abstract description 19
- 238000000034 method Methods 0.000 title claims abstract description 9
- 239000007789 gas Substances 0.000 claims abstract description 33
- 230000008878 coupling Effects 0.000 claims abstract description 11
- 238000010168 coupling process Methods 0.000 claims abstract description 11
- 238000005859 coupling reaction Methods 0.000 claims abstract description 11
- 238000010248 power generation Methods 0.000 claims description 12
- 230000006835 compression Effects 0.000 claims description 7
- 238000007906 compression Methods 0.000 claims description 7
- 238000002485 combustion reaction Methods 0.000 claims description 6
- 239000002028 Biomass Substances 0.000 claims description 4
- 239000002440 industrial waste Substances 0.000 claims description 4
- 230000010355 oscillation Effects 0.000 claims description 4
- 238000010521 absorption reaction Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims description 3
- 238000012546 transfer Methods 0.000 abstract description 16
- 229910001338 liquidmetal Inorganic materials 0.000 abstract description 11
- 239000000463 material Substances 0.000 abstract description 9
- 238000011084 recovery Methods 0.000 description 5
- 238000013461 design Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000011261 inert gas Substances 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- RDYMFSUJUZBWLH-UHFFFAOYSA-N endosulfan Chemical compound C12COS(=O)OCC2C2(Cl)C(Cl)=C(Cl)C1(Cl)C2(Cl)Cl RDYMFSUJUZBWLH-UHFFFAOYSA-N 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 229910001092 metal group alloy Inorganic materials 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000013529 heat transfer fluid Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
- F28D7/10—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged one within the other, e.g. concentrically
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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
- F02G1/0435—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 the engine being of the free piston type
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B9/00—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point
- F25B9/14—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point characterised by the cycle used, e.g. Stirling cycle
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F13/00—Arrangements for modifying heat-transfer, e.g. increasing, decreasing
- F28F13/06—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by affecting the pattern of flow of the heat-exchange media
- F28F13/12—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by affecting the pattern of flow of the heat-exchange media by creating turbulence, e.g. by stirring, by increasing the force of circulation
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Engine Equipment That Uses Special Cycles (AREA)
Abstract
The invention relates to the technical field of heat engines of regenerative type, and provides a high-pressure helium gas heat exchange system, a heat exchange method and a heat engine system of regenerative type, wherein one side of the high-pressure helium gas heat exchange system is communicated with an external heat source, and the other side of the high-pressure helium gas heat exchange system is communicated with a shell side of a high-temperature heat exchanger of the heat engine of regenerative type; comprising the following steps: the heat exchange loop is internally filled with high-pressure helium; the axial flow fan is arranged on the heat exchange loop and is used for generating a stream of helium direct current in the heat exchange loop to exchange heat with an external heat source in a coupling way. According to the high-pressure helium gas heat exchange system and the regenerative heat engine system, high-pressure helium gas is filled in the heat exchange loop, the axial flow fan is arranged on the heat exchange loop and is used for generating helium gas direct current in the heat exchange loop and performing coupling heat exchange with an external heat source, and the material compatibility of corrosive heat transfer media such as liquid metal and the like and a bearing structure of the heat head is not required to be considered.
Description
Technical Field
The invention relates to the technical field of regenerative heat engines, in particular to a high-pressure helium heat exchange system, a heat exchange method and a regenerative heat engine system.
Background
The heat engine is a kind of machinery which uses internal energy to do work, and usually uses gas as working medium, and uses the gas to do work by heating expansion. Taking a free piston Stirling generator as an example.
The free piston Stirling generator is a high-efficiency and long-life thermoelectric conversion device, which is formed by coupling a free piston Stirling engine and a linear oscillation motor, and converts heat energy into sound energy of compressible fluid in reciprocating oscillation through a thermoacoustic effect, so that a power piston is driven to drive a magnet to reciprocate to cut magnetic force lines to generate alternating current.
With the increasing demand for space exploration, free piston stirling generators have gained attention for their advantages of high efficiency, high reliability, long life, etc. The free piston Stirling generator generally adopts inert gases such as helium as an internal working medium, belongs to an external combustion type heat engine, has extremely wide heat source applicability, and can utilize heat sources such as nuclear heat, solar energy, industrial waste heat, fuel combustion and the like.
FIG. 1 is a schematic diagram of a typical structure of a conventional free piston Stirling power generation system, in which a two-circuit heat transfer cycle (e.g., molten salt, liquid metal, etc.) of a high specific heat fluid is typically added to absorb heat from an external high temperature heat source (e.g., nuclear reactor), and then the heat is transferred to high pressure helium gas inside the system for expansion work by a high temperature heat exchanger 61 (a dividing wall heat exchanger) inside the generator.
However, the introduction of a two-circuit heat transfer cycle not only increases the complexity of the system, but also requires an additional power consuming first drive pump 13 for driving the heat transfer fluid to complete the endothermic and exothermic cycles. In addition, if liquid metal such as sodium and lithium is adopted as a circulating medium, the liquid metal has serious corrosiveness to the metal alloy commonly used at present, so that more serious challenges are brought to the pressure-bearing structure design of the generator thermal head, meanwhile, the liquid metal is required to be driven by an electromagnetic pump, and the efficiency level of the electromagnetic pump is extremely low (less than or equal to 5 percent) at present, so that the power consumption of the electromagnetic pump also greatly reduces the operation economy of the system.
Disclosure of Invention
The invention provides a high-pressure helium heat exchange system, a heat exchange method and a regenerative heat engine system, which are used for solving the defects that in the prior art, the regenerative heat engine is added with two-loop heat transfer circulation to realize heat transfer, the complexity of the system is increased, and when liquid metal is used as a circulation medium, the liquid metal easily has serious corrosiveness to the metal alloy commonly used at present, and the design of a pressure-bearing structure of a generator thermal head is severely challenged.
The invention provides a high-pressure helium heat exchange system, which is used in a recuperative heat engine, wherein one side of the high-pressure helium heat exchange system is communicated with an external heat source, and the other side of the high-pressure helium heat exchange system is communicated with a shell side of a high-temperature heat exchanger of the recuperative heat engine, and the high-pressure helium heat exchange system comprises:
the heat exchange loop is internally filled with high-pressure helium;
the axial flow fan is arranged on the heat exchange loop and is used for generating helium direct current in the heat exchange loop and performing coupling heat exchange with an external heat source.
According to the high-pressure helium heat exchange system provided by the invention, the external heat source is one of nuclear reactor, solar energy, industrial waste heat or biomass energy.
The invention also provides a heat exchange method, which comprises the following steps:
one side of the heat exchange loop is communicated with an external heat source, and the other side of the heat exchange loop is communicated with a shell side of a high-temperature heat exchanger of the recuperative heat engine;
filling high-pressure helium into the heat exchange loop;
forming a gas driving force along a fixed direction through an axial flow fan so as to enable helium gas to be generated in a heat exchange loop to flow directly and absorb heat through an external heat source;
the high-pressure helium after heat absorption and temperature rise passes through the shell side of a high-temperature heat exchanger of the regenerative heat engine to heat helium working medium in the heat exchange tube;
the regenerative heat engine finally realizes acting by absorbing the direct-current heat of helium outside the tube from the high-temperature heat exchanger.
The invention also provides a recuperative heat engine system comprising:
an external heat source for providing heat;
the heat engine is internally provided with helium as a gas working medium, and the heat is converted into sound energy of the gas working medium in reciprocating oscillation through a thermoacoustic effect, so that work is done outwards;
and one side of the high-pressure helium gas heat exchange system is communicated with the external heat source, and the other side of the high-pressure helium gas heat exchange system is communicated with the shell side of the high-temperature heat exchanger of the recuperative heat engine.
According to the invention, the recuperative heat engine is a free piston Stirling generator, and the free piston Stirling generator comprises:
one end of the cylinder body is provided with an expansion cavity;
the positioning flange and the phase modulator are arranged in the cylinder body, and the phase modulator is arranged on one side, close to the expansion cavity, of the positioning flange; the outer peripheral side of the phase modulator is provided with a thermo-acoustic unit which is used for generating acoustic power, and one side of the positioning flange, which is far away from the expansion cavity, forms a mounting cavity;
the power piston is arranged in the mounting cavity; the periphery of the power piston is provided with a power generation unit; the power piston reciprocates relative to the positioning flange under the action of sound work;
the positioning flange and the cylinder body form a compression cavity, and the compression cavity is positioned between the thermoacoustic unit and the power generation unit and is communicated with the installation cavity.
According to the present invention there is provided a recuperative heat engine system, the phase modulator comprising:
the periphery of the phase modulator body is provided with the thermo-acoustic unit;
the phase modulator rod is connected to one end of the phase modulator body, which is far away from the expansion cavity; and the phaser rod passes through from inside the power piston.
According to the regenerative heat engine system provided by the invention, the cylinder body is internally provided with the plate spring, and the plate spring is connected with the phase modulator rod.
According to the regenerative heat engine system provided by the invention, the thermoacoustic unit comprises a high-temperature heat exchanger, a heat regenerator and a low-temperature heat exchanger which are sequentially connected, wherein the high-temperature heat exchanger is arranged at one side close to the expansion cavity;
the positioning flange is provided with a connecting hole, and the connecting hole is used for transmitting the acoustic power generated by the thermo-acoustic unit to the power piston.
According to the regenerative heat engine system provided by the invention, the power generation unit is a linear motor.
According to the recuperative heat engine system provided by the invention, the recuperative heat engine is one of a thermoacoustic engine, a thermoacoustic refrigerator, a Stirling heat pump or a Stirling refrigerator.
According to the high-pressure helium heat exchange system provided by the invention, high-pressure helium is filled in the heat exchange loop, the axial flow fan is arranged on the heat exchange loop and is used for generating helium direct current in the heat exchange loop and carrying out coupling heat exchange with an external heat source, and the material compatibility of corrosive heat transfer media such as liquid metal and the like and a bearing structure of the thermal head is not required to be considered, so that the high-pressure helium heat exchange system has the advantages of simple and compact structure, wide heat source adaptability, high thermoelectric efficiency and the like.
The present invention also provides a recuperative heat engine system that includes various advantages as described above due to the inclusion of a high pressure helium heat exchange system as described above.
Drawings
In order to more clearly illustrate the invention or the technical solutions of the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the invention, and other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a prior art free piston Stirling generator;
FIG. 2 is a schematic diagram of the free piston Stirling generator according to one embodiment of the present invention;
FIG. 3 is a schematic illustration of the structure of a free piston Stirling generator in accordance with yet another embodiment of the invention;
FIG. 4 is a schematic illustration of the structure of a free piston Stirling generator in accordance with yet another embodiment of the invention;
reference numerals:
1. a heat exchange loop; 2. an axial flow fan; 3. a cylinder; 4. an expansion chamber; 5. positioning a flange; 6. a thermo-acoustic unit; 7. a power piston; 8. a power generation unit; 9. a compression chamber; 10. a phase modulator body; 11. a phase modulator rod; 12. a plate spring; 13. a first drive pump; 14. an external heat source; 61. a high temperature heat exchanger; 62. a regenerator; 63. a low temperature heat exchanger.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the embodiments of the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
The high pressure helium gas heat transfer system and the recuperative heat engine system of the present invention are described below with reference to fig. 2 through 4.
The embodiment of the invention provides a high-pressure helium heat exchange system which is used in a recuperative heat engine, wherein one side of the high-pressure helium heat exchange system is communicated with an external heat source 14, and the other side of the high-pressure helium heat exchange system is communicated with a shell side of a high-temperature heat exchanger of the recuperative heat engine; the high-pressure helium gas filling device comprises a heat exchange loop 1 and an axial flow fan 2, wherein high-pressure helium gas is filled in the heat exchange loop 1; the axial flow fan 2 is arranged on the heat exchange loop 1, and the axial flow fan 2 is used for generating gas in the heat exchange loop 1, namely helium direct current and external heat source 14 for coupling heat exchange.
Wherein, for a tube heat exchanger, the shell side refers to the part of the medium flowing through the channel outside the heat exchange tube and communicated with the channel. High pressure helium typically refers to helium at 50 to 150 atmospheres.
According to the invention, the axial flow fan is arranged on the heat exchange loop, and a stream of high-pressure helium direct current can be generated on the heat exchange loop through the axial flow fan to directly exchange heat with the external heat source 14 in a coupling way, so that the material compatibility of corrosive heat transfer media such as liquid metal and the like and a bearing structure of the thermal head is not required to be considered, and the heat exchange device has the advantages of simple and compact structure, wide heat source adaptability, high thermoelectric efficiency and the like.
In one embodiment of the present invention, the external heat source 14 is one of a nuclear reactor, solar energy, industrial waste heat, or combustion biomass energy, so long as a heat source is provided.
Therefore, the high-pressure helium gas heat exchange system provided by the invention generates a stream of high-pressure helium gas direct current through the axial flow fan in the heat exchange loop to directly exchange heat with the external heat source 14 in a coupling way, does not need to consider the material compatibility of corrosive heat transfer media such as liquid metal and the like and the bearing structure of the thermal head, and has the advantages of simple and compact structure, wide heat source adaptability, high thermoelectric efficiency and the like. The external heat source 14 can be selected according to the actual needs.
In another aspect, an embodiment of the present invention further provides a heat exchange method, including the steps of: one side of the heat exchange loop 1 is communicated with an external heat source 14, and the other side is communicated with a shell side of a high-temperature heat exchanger of the recuperative heat engine; high-pressure helium is filled in the heat exchange loop 1; forming a gas driving force along a fixed direction by an axial flow fan 2 so as to enable helium gas to be generated in the heat exchange loop 1 and absorb heat through an external heat source 14; the high-pressure helium after heat absorption and temperature rise passes through the shell side of a high-temperature heat exchanger of the regenerative heat engine to heat helium working medium in the heat exchange tube; the regenerative heat engine finally realizes acting by absorbing the direct-current heat of helium outside the tube from the high-temperature heat exchanger.
According to the heat exchange method provided by the embodiment of the invention, a high-pressure helium direct current is generated in the heat exchange loop 1 through the axial flow fan 2 to directly exchange heat with the external heat source 14 in a coupling way, the material compatibility of other heat transfer media and a heat head pressure-bearing structure is not needed to be considered, the heat source adaptability is wide, and the thermoelectric efficiency is high.
The heat recovery type heat engine system provided by the invention is described below, and the heat recovery type heat engine system described below and the high-pressure helium gas heat exchange system described above can be correspondingly referred to each other.
Another embodiment of the present invention provides a heat recovery type heat engine system, including an external heat source 14, a heat recovery type heat engine, and a high pressure helium gas heat exchange system as described above, where the external heat source 14 is configured to provide heat, inert gases such as high pressure helium gas are used as an internal working medium in the heat recovery type heat engine, and the inert gases are heated and expanded to perform work; the heat exchange system as described above is in communication with an external heat source 14 on one side and with the shell side of the high temperature heat exchanger of the recuperative heat engine on the other side.
The recuperative heat engine can be one of a free piston Stirling generator, a thermo-acoustic engine, a thermo-acoustic refrigerator, a Stirling heat pump or a Stirling refrigerator.
The following description will take a free piston stirling generator as an example.
The free piston Stirling generator includes: an expansion cavity 4 is formed at one end of the cylinder body 3; the positioning flange 5 and the phase modulator are arranged in the cylinder body 3, and the phase modulator is arranged on one side of the positioning flange 5, which is close to the expansion cavity 4; the outer peripheral side of the phase modulator is provided with a thermo-acoustic unit 6, the thermo-acoustic unit 6 is used for generating acoustic power, and a mounting cavity is formed at one side of the positioning flange 5 away from the expansion cavity 4; a power piston 7 arranged in the mounting cavity; the periphery of the power piston 7 is provided with a power generation unit 8; the power piston 7 reciprocates relative to the positioning flange 5 under the action of sound work; the positioning flange 5 and the cylinder body 3 form a compression cavity 9, and the compression cavity 9 is positioned between the thermo-acoustic unit 6 and the power generation unit 8 and is communicated with the installation cavity.
The phase modulator comprises a phase modulator body 10 and a phase modulator rod 11, and a thermoacoustic unit is arranged on the periphery of the phase modulator body 10; the phase modulator rod 11 is connected to one end of the phase modulator body 10 away from the expansion chamber 4; and the phaser rod 11 passes through the interior of the power piston 7. A plate spring 12 is also arranged in the cylinder body 3, and the plate spring 12 is connected with a phase modulator rod 11. The thermo-acoustic unit 6 comprises a high-temperature heat exchanger 61, a heat regenerator 62 and a low-temperature heat exchanger 63 which are sequentially connected, and the high-temperature heat exchanger 61 is arranged at one side close to the expansion cavity 4; the positioning flange 5 is provided with a connecting hole for transmitting the acoustic work generated by the thermo-acoustic unit 6 to the power piston 7. The power generation unit 8 is a linear motor.
In one embodiment of the invention, as shown in FIG. 2, the external heat source 14 is a nuclear reactor.
In the above embodiment of the present invention, during normal operation of the system, the heat exchange loop 1 is filled with high pressure helium, and a stable high pressure helium direct current is generated in the heat exchange loop 1 by the axial flow fan 2, so that heat is absorbed by the nuclear reactor (belonging to a helium cold reactor), and the carried heat is transferred to the helium in the system by the dividing wall type heat exchange of the high temperature heat exchanger 61, and finally, the conversion from heat energy to sound work is realized in the heat regenerator 62. In the embodiment, the heat exchange loop is not communicated with the working gas in the free piston Stirling generator, and the high-temperature axial flow fan 2 provides driving force to complete circulation, so that an additional two loops are omitted, and the complexity and the running cost of the system are reduced. In addition, because high-pressure helium is adopted for heat transfer, the problem of material compatibility of liquid metal and a thermal head pressure-bearing structure is not required to be considered when the generator body is designed, and the design difficulty of the free piston generator is greatly reduced.
In another embodiment of the present invention, as shown in fig. 3, the operation principle is similar to that of the previous embodiment, except that the external heat source 14 is a combustion biomass energy, and the structure allows a larger combustion-flow coupled heat transfer area to be obtained and has a higher heat transfer efficiency than the combustion directly on the outer wall surface of the high temperature heat exchanger 61.
In a further embodiment of the invention, shown in fig. 4, the principle of operation is similar to that of the previous embodiment, except that the external heat source 14 is solar energy, which allows a sufficiently large solar heat transfer area to be obtained, and is simple and compact and has high heat transfer efficiency.
In summary, the free piston Stirling power generation system provided by the invention generates a stream of high-pressure helium gas through the axial flow fan in a loop to directly exchange heat with the external heat source 14 in a coupling way, and the material compatibility of other heat transfer media and a thermal head bearing structure is not needed to be considered, so that the free piston Stirling power generation system has the advantages of simple structure, wide heat source adaptability, high thermoelectric efficiency and the like.
In describing embodiments of the present invention, it should be noted that, unless explicitly stated and limited otherwise, the terms "coupled," "coupled," and "connected" should be construed broadly, and may be either a fixed connection, a removable connection, or an integral connection, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in the embodiments of the present invention will be understood by those of ordinary skill in the art according to specific circumstances.
In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "manner," "particular modes," or "some modes," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or mode is included in at least one embodiment or mode of the embodiments of the present invention. In this specification, the schematic representations of the above terms are not necessarily directed to the same embodiment or manner. Furthermore, the particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or ways. Furthermore, various embodiments or modes and features of various embodiments or modes described in this specification can be combined and combined by those skilled in the art without mutual conflict.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (9)
1. The high-pressure helium heat exchange system is used in the recuperative heat engine, one side of the high-pressure helium heat exchange system is communicated with an external heat source, and the other side of the high-pressure helium heat exchange system is communicated with a shell side of a high-temperature heat exchanger of the recuperative heat engine; characterized by comprising the following steps:
the device comprises a heat exchange loop (1), wherein high-pressure helium is filled in the heat exchange loop (1);
the axial flow fan (2) is arranged on the heat exchange loop (1), and the axial flow fan (2) is used for generating helium direct current in the heat exchange loop (1) and performing coupling heat exchange with an external heat source.
2. The high pressure helium gas heat exchange system according to claim 1, wherein the external heat source (14) is one of a nuclear reactor, solar energy, industrial waste heat or combustion biomass energy.
3. A method of heat exchange comprising the steps of:
one side of the heat exchange loop is communicated with an external heat source, and the other side of the heat exchange loop is communicated with a shell side of a high-temperature heat exchanger of the recuperative heat engine;
filling high-pressure helium into the heat exchange loop;
forming a gas driving force along a fixed direction through an axial flow fan so as to enable helium gas to be generated in a heat exchange loop to flow directly and absorb heat through an external heat source;
the high-pressure helium after heat absorption and temperature rise passes through the shell side of a high-temperature heat exchanger of the regenerative heat engine to heat helium working medium in the heat exchange tube;
the regenerative heat engine finally realizes acting by absorbing the direct-current heat of helium outside the tube from the high-temperature heat exchanger.
4. A recuperative heat engine system, comprising:
an external heat source for providing heat;
the heat engine is internally provided with helium as a gas working medium, and the heat is converted into sound energy of the gas working medium in reciprocating oscillation through a thermoacoustic effect, so that work is done outwards;
the high pressure helium heat exchange system according to claim 1 or 2, with one side communicating with said external heat source (14) and with the other side communicating with the shell side of the high temperature heat exchanger of said recuperative heat engine.
5. The recuperative heat engine system of claim 4, wherein the recuperative heat engine is a free piston stirling generator, the free piston stirling generator comprising:
a cylinder body (3) with an expansion chamber (4) formed at one end;
the positioning flange (5) and the phase modulator are arranged in the cylinder body (3), and the phase modulator is arranged at one side of the positioning flange (5) close to the expansion cavity (4); the periphery side of the phase modulator is provided with a thermo-acoustic unit (6), the thermo-acoustic unit (6) is used for generating acoustic work, and one side of the positioning flange (5) far away from the expansion cavity (4) forms a mounting cavity;
the power piston (7) is arranged in the mounting cavity; the periphery of the power piston (7) is provided with a power generation unit (8); the power piston (7) reciprocates relative to the positioning flange (5) under the action of sound and power;
the positioning flange (5) and the cylinder body (3) form a compression cavity (9), and the compression cavity (9) is positioned between the thermo-acoustic unit (6) and the power generation unit (8) and is communicated with the installation cavity.
6. The recuperative heat engine system of claim 5, wherein the phase modulator comprises:
a phase modulator body (10), wherein the thermo-acoustic unit is arranged on the periphery of the phase modulator body (10);
a phase modulator rod (11) connected to one end of the phase modulator body (10) remote from the expansion chamber (4); and the phase modulator rod (11) passes through the interior of the power piston (7).
7. The recuperative heat engine system according to claim 6, characterized in that a plate spring (12) is further arranged in the cylinder (3), the plate spring (12) being connected with the phase modulator rod (11).
8. The recuperative heat engine system according to claim 5, characterized in that the thermo-acoustic unit (6) comprises a high temperature heat exchanger (61), a regenerator (62) and a low temperature heat exchanger (63) connected in sequence, the high temperature heat exchanger (61) being arranged close to one side of the expansion chamber (4);
the positioning flange (5) is provided with a connecting hole, and the connecting hole is used for transmitting the acoustic power generated by the thermo-acoustic unit (6) to the power piston (7).
9. The recuperative heat engine system of claim 5, wherein the recuperative heat engine is one of a thermo-acoustic engine, a thermo-acoustic refrigerator, a stirling heat pump, or a stirling refrigerator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310502506.1A CN116358323A (en) | 2023-05-06 | 2023-05-06 | High-pressure helium heat exchange system, heat exchange method and regenerative heat engine system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310502506.1A CN116358323A (en) | 2023-05-06 | 2023-05-06 | High-pressure helium heat exchange system, heat exchange method and regenerative heat engine system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116358323A true CN116358323A (en) | 2023-06-30 |
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ID=86922923
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310502506.1A Pending CN116358323A (en) | 2023-05-06 | 2023-05-06 | High-pressure helium heat exchange system, heat exchange method and regenerative heat engine system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116358323A (en) |
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2023
- 2023-05-06 CN CN202310502506.1A patent/CN116358323A/en active Pending
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