CN116255844A - Alternating flow heat exchanger and heat power conversion system - Google Patents

Alternating flow heat exchanger and heat power conversion system Download PDF

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Publication number
CN116255844A
CN116255844A CN202111501509.0A CN202111501509A CN116255844A CN 116255844 A CN116255844 A CN 116255844A CN 202111501509 A CN202111501509 A CN 202111501509A CN 116255844 A CN116255844 A CN 116255844A
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China
Prior art keywords
liquid
channel
heat exchange
heat exchanger
gas
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CN202111501509.0A
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Chinese (zh)
Inventor
胡剑英
王日颖
罗二仓
贾子龙
张丽敏
陈燕燕
吴张华
孙岩雷
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Technical Institute of Physics and Chemistry of CAS
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Technical Institute of Physics and Chemistry of CAS
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Priority to CN202111501509.0A priority Critical patent/CN116255844A/en
Publication of CN116255844A publication Critical patent/CN116255844A/en
Pending legal-status Critical Current

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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
    • F28D7/16—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 in parallel spaced relation
    • F28D7/163—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 in parallel spaced relation with conduit assemblies having a particular shape, e.g. square or annular; with assemblies of conduits having different geometrical features; with multiple groups of conduits connected in series or parallel and arranged inside common casing
    • F28D7/1638—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 in parallel spaced relation with conduit assemblies having a particular shape, e.g. square or annular; with assemblies of conduits having different geometrical features; with multiple groups of conduits connected in series or parallel and arranged inside common casing with particular pattern of flow or the heat exchange medium flowing inside the conduits assemblies, e.g. change of flow direction from one conduit assembly to another one
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/24—Arrangements for promoting turbulent flow of heat-exchange media, e.g. by plates

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Geometry (AREA)
  • Fluid Mechanics (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

Abstract

The invention provides an alternating flow heat exchanger and a heat power conversion system, which relate to the field of heat exchangers and provide an alternating flow heat exchanger, comprising: the heat exchange core comprises a gas channel and a liquid channel, the gas channel penetrates through the heat exchange core, heat exchange liquid in the liquid channel moves along the axis direction of the gas channel, one end of the heat exchange core is provided with a first diversion hole, the other end of the heat exchange core is provided with a second diversion hole, and the first diversion hole and the second diversion hole are both communicated with the liquid channel; the liquid inlet channel is communicated with the first diversion hole; the liquid outlet channel is communicated with the second diversion hole. According to the alternating flow heat exchanger provided by the invention, the first diversion holes communicated with the liquid inlet channel and the second diversion holes communicated with the liquid outlet channel are arranged at the upper end and the lower end of the heat exchange core, so that heat exchange liquid in the liquid channel moves along the axial direction of the gas channel, the non-uniformity of the circumferential temperature distribution in the alternating flow heat exchanger caused by the temperature rise of the heat exchange fluid is further reduced, and the heat exchange performance of the alternating flow heat exchanger is improved.

Description

Alternating flow heat exchanger and heat power conversion system
Technical Field
The invention relates to the technical field of heat exchangers, in particular to an alternating flow heat exchanger and a heat-power conversion system.
Background
The alternating flow heat-power conversion system is an efficient, reliable and environment-friendly energy conversion device, and comprises a free piston Stirling heat engine, a thermoacoustic heat engine, a pulse tube refrigerator and the like, and is widely applied to the fields of solar power generation, aviation, superconductivity and the like. In the heat exchanger of the alternating flow heat-power conversion system, the inner side gas carries out alternating flow, and the outer side heat carrier fluid carries out unidirectional stable flow. The heat exchange between the inner gas and the outer fluid is realized through the interaction between the inner gas and the inner wall surface of the heat exchanger, the heat conduction of the solid structure of the heat exchanger and the interaction between the outer wall surface of the heat exchanger and the outer fluid.
The current commonly used alternating current flow heat exchanger mainly comprises two types of fin type and shell and tube type. For example, in a conventional fin type heat exchanger structure, the outer side is usually a stainless steel shell, the inner side is a red copper heat exchange core, an external fluid flow channel is arranged between the stainless steel shell and the red copper heat exchange core, and working gas in the system flows in fin gaps. For example, in another existing shell-and-tube heat exchanger structure, the gas working medium flows inside the circular tube, and the external fluid flows between the outer side of the circular tube and the outer shell.
In both heat exchangers, since the external fluid flows circumferentially in the heat exchanger, when the heat transfer fluid inlet temperature and the heat transfer fluid outlet temperature differ greatly, the heat exchanger has a large temperature gradient in the circumferential direction, i.e. the temperature distribution is uneven on the cross section perpendicular to the axis direction, thereby causing uneven heat transfer and flow of the internal gas and reducing the performance of the heat exchanger.
Disclosure of Invention
The invention provides an alternating flow heat exchanger and a heat-power conversion system, which are used for solving the defects that in the prior art, because heat exchange fluid flows in the circumferential direction in the heat exchanger, when the temperature difference between the inlet temperature and the outlet temperature of the heat exchange fluid is large, the heat exchanger has large temperature gradient in the circumferential direction, namely the temperature distribution on the cross section perpendicular to the axis direction is uneven, so that a gas channel of a heat exchange core penetrates through the heat exchange core along the axis direction of the heat exchange core, heat exchange liquid in a liquid channel moves along the axis direction of the gas channel, and the internal circumferential temperature distribution unevenness of the alternating flow heat exchanger caused by the temperature rise of the heat exchange fluid is reduced, thereby improving the performance of the alternating flow heat exchanger.
The invention provides an alternating flow heat exchanger comprising:
the heat exchange core comprises a gas channel and a liquid channel, the gas channel penetrates through the heat exchange core along the axial direction of the heat exchange core, heat exchange liquid in the liquid channel moves along the axial direction of the gas channel, a first flow dividing hole is formed in one end of the outer wall of the heat exchange core, a second flow dividing hole is formed in the other end of the outer wall of the heat exchange core, and the first flow dividing hole and the second flow dividing hole are communicated with the liquid channel;
the liquid inlet channel is communicated with the first split flow hole;
and the liquid outlet channel is communicated with the second flow dividing hole.
According to the alternating flow heat exchanger provided by the invention, the liquid channel comprises a first transverse channel, a second transverse channel and a through channel, the first transverse channel is communicated with the first diversion hole, the second transverse channel is communicated with the second diversion hole, the through channel is communicated with the first transverse channel and the second transverse channel,
wherein the through passage is parallel to the axial direction of the gas passage.
According to the alternating flow heat exchanger provided by the invention, the gas channels and the liquid channels are alternately distributed, and the gas channels comprise zigzag fins.
According to the alternating flow heat exchanger provided by the invention, the gas channels and the liquid channels are alternately distributed, and the gas channels comprise airflow holes.
According to the alternating flow heat exchanger provided by the invention, the axial length of the gas channel is smaller than the maximum stroke of gas.
According to the alternating flow heat exchanger provided by the invention, the liquid channel is an inner cavity of the heat exchange core, the gas channel is an air duct, the air duct is arranged in the inner cavity and penetrates through the inner cavity,
the first diversion hole is formed in one end of the inner cavity, and the second diversion hole is formed in the other end of the inner cavity.
According to the alternating flow heat exchanger provided by the invention, the liquid channel comprises the first partition plates and the second partition plates, the first partition plates and the second partition plates are alternately distributed along the axial direction of the air duct,
the first partition board is installed on one side of the inner cavity, the extending end of the first partition board is spaced from the other side of the inner cavity, the second partition board is installed on one side of the inner cavity opposite to the first partition board, and the extending end of the second partition board is spaced from one side of the inner cavity where the first partition board is located.
According to the alternating flow heat exchanger provided by the invention, the heat exchange core is annular, the upper end of the outer wall of the heat exchange core is provided with the first diversion holes at equal angles, the lower end of the outer wall of the heat exchange core is provided with the second diversion holes at equal angles,
wherein the gas channels are arranged in the heat exchange core at equal angles.
According to the alternating flow heat exchanger provided by the invention, the liquid inlet channel is provided with the liquid inlet, the liquid outlet channel is provided with the liquid outlet, and a pair of the liquid inlet and the liquid outlet are arranged on the alternating flow heat exchanger in a pair of angles.
The invention also provides a heat-power conversion system, which comprises a heat regenerator and the alternating flow heat exchanger;
one end of the heat regenerator is communicated with one end of the gas channel, the liquid inlet channel is close to the heat regenerator, and the liquid outlet channel is far away from the heat regenerator.
According to the alternating flow heat exchanger provided by the invention, the gas channel penetrating the heat exchange core along the axis direction of the heat exchange core and the liquid channel for exchanging heat of gas are arranged in the heat exchange core, and the first diversion hole communicated with the liquid inlet channel and the second diversion hole communicated with the liquid outlet channel are arranged at the upper end and the lower end of the heat exchange core, so that heat exchange liquid in the liquid channel moves along the axis direction of the gas channel, and further, the non-uniformity of the circumferential temperature distribution in the alternating flow heat exchanger caused by the temperature rise of the heat exchange fluid is reduced, and the heat exchange performance of the alternating flow heat exchanger is improved.
Further, in the heat-power conversion system provided by the invention, since the alternating flow heat exchanger is provided as described above, various advantages as described above are also provided.
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 one of the overall structures of a first alternate flow heat exchanger provided by the present invention;
FIG. 2 is a top view of the first alternating flow heat exchanger of FIG. 1;
FIG. 3 is a cross-sectional view of FIG. 2;
FIG. 4 is a second overall construction of a second alternate flow heat exchanger provided by the present invention;
FIG. 5 is a cut-away isometric view of the second alternate flow heat exchanger of FIG. 4;
FIG. 6 is a third overall construction of a third alternate flow heat exchanger provided by the present invention;
FIG. 7 is one of the top plan views of the third alternate flow heat exchanger of FIG. 6;
FIG. 8 is a cross-sectional view of FIG. 7;
FIG. 9 is a cut-away isometric view of a third alternate flow heat exchanger;
FIG. 10 is a cut-away isometric view of a fourth alternate flow heat exchanger;
FIG. 11 is a partial schematic view of a finned airway tube;
fig. 12 is a schematic diagram of a thermal power conversion system.
Reference numerals:
100: a heat exchange core; 101: a liquid channel; 102: a gas channel; 103: a first tap hole; 104: a second diversion aperture; 110: a first transverse channel; 111: a second transverse channel; 112: a through passage; 113: an air flow hole; 120: an air duct; 121: an inner cavity; 122: a first separator; 123: a second separator; 130: an upper cover plate; 131; an outer housing; 132: a lower cover plate; 133: an inner housing; 200: a liquid inlet channel; 210: a liquid outlet channel; 201: a liquid inlet; 202: a liquid outlet; 300: a regenerator; 301: a first alternating flow heat exchanger; 302: a second alternating flow heat exchanger; 303: a phase modulator; 304: a linear motor unit.
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, directions or positional relationships indicated by terms such as "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., are based on directions or positional relationships shown in the drawings, are merely for convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific direction, be configured and operated in a specific direction, 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.
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 embodiments of the present invention will be understood in detail by those of ordinary skill in the art.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the embodiments of the present invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
Embodiments of the present invention are described below with reference to fig. 1 to 12. It is to be understood that the following are only illustrative embodiments of the present invention and are not to be construed as limiting the invention.
As shown in fig. 1 to 3, the present invention provides an alternating flow heat exchanger comprising: the heat exchange core 100, the liquid inlet channel 200 and the liquid outlet channel 210 are filled with heat exchange liquid from the liquid inlet channel 200, the gas passing through the heat exchange core 100 exchanges heat through the heat exchange core 100, and the heat exchange liquid flows out from the liquid outlet channel 210 after exchanging heat.
The heat exchange core 100 comprises a gas channel 102 and a liquid channel 101, the gas channel 102 penetrates through the heat exchange core 100 along the axial direction of the heat exchange core 100, heat exchange liquid in the liquid channel 101 moves along the axial direction of the gas channel 102, a first flow dividing hole 103 is formed in one end of the outer wall of the heat exchange core 100, a second flow dividing hole 104 is formed in the other end of the outer wall of the heat exchange core 100, and the first flow dividing hole 103 and the second flow dividing hole 104 are communicated with the liquid channel 101. The liquid inlet channel 200 is communicated with the first diversion hole 103; the liquid outlet passage 210 communicates with the second flow dividing hole 104.
Specifically, the heat exchange core 100 is columnar, the upper part of the outer wall of the heat exchange core 100 is provided with first tap holes 103 distributed at equal intervals, the lower part of the outer wall of the heat exchange core 100 is provided with second tap holes 104 distributed at equal intervals, the first tap holes 103 are used for communicating one end of the liquid channel 101 with the liquid inlet channel 200, and the second tap holes 104 are used for communicating the other end of the liquid channel 101 with the liquid outlet channel 210. One end of the liquid channel 101 enters the heat exchange liquid and flows out from the other end of the liquid channel 101, and the flowing direction of the heat exchange liquid in the liquid channel 101 is along the axial direction of the gas channel 102, so that the non-uniformity of the temperature distribution in the inner circumference of the alternating flow heat exchanger caused by the temperature rise of the external heat exchange liquid can be reduced.
For the axial movement of the heat exchange liquid in the liquid passage 101 along the gas passage 102 of the present invention, the heat exchange liquid may be moved in a direction parallel to the axial direction of the gas passage 102, or the heat exchange liquid may be moved in a spiral direction along the axial direction of the gas passage 102.
In an alternative embodiment of the invention, the axial length of the gas channel is smaller than the maximum travel of the gas. Wherein the gas flow is an alternating flow. That is, the maximum length of the alternating flow heat exchanger is less than the maximum travel of the gas.
In one embodiment of the present invention, the liquid inlet channel 200 is provided with a liquid inlet 201, the liquid outlet channel 210 is provided with a liquid outlet 202, and a pair of liquid inlet 201 and liquid outlet 202 are arranged diagonally. Specifically, the liquid inlet channel 200 may be provided with a liquid inlet 201, the liquid outlet channel 210 may be provided with a liquid outlet 202, and the liquid inlet channel 200 is annularly disposed outside the heat exchange core 100, so that each first tap hole 103 is communicated with the liquid inlet 201. The liquid outlet channel 210 is annularly arranged outside the heat exchange core 100, so that each second flow dividing hole 104 is communicated with the liquid outlet 202. The liquid inlet 201 and the liquid outlet 202 are arranged at two radial ends of the heat exchange core 100 in the radial direction of the heat exchange core 100, and the liquid inlet 201 and the liquid outlet 202 are arranged at two axial ends of the heat exchange core 100 in the axial direction of the heat exchange core 100, so that the liquid inlet 201 and the liquid outlet 202 are diagonally arranged on the whole alternating flow heat exchanger.
The liquid inlet 201 and the liquid outlet 202 are arranged on two sides of the axial direction of the heat exchange core 100, so that when the temperature difference between the inlet and the outlet of the heat exchange fluid is large, the alternating flow heat exchanger can avoid a large temperature gradient in the circumferential direction of the alternating flow heat exchanger, and the temperature distribution of the cross section of the heat exchange core 100 perpendicular to the axial direction can be more uniform, thereby avoiding the performance deterioration of a heat power conversion system.
As shown in fig. 1 to 5, in one embodiment of the present invention, the liquid passage 101 includes a first lateral passage 110, a second lateral passage 111, and a through passage 112, the first lateral passage 110 communicates with the first diversion hole 103, the second lateral passage 111 communicates with the second diversion hole 104, and the through passage 112 communicates the first lateral passage 110 and the second lateral passage 111. Wherein the through passage 112 is parallel to the axial direction of the gas passage 102.
In other words, the heat exchange liquid entering from the liquid inlet channel 200 enters the first transverse channel 110 through the first tap hole 103, flows through the through channel 112 into the second transverse channel 111, and flows into the liquid outlet channel 210 through the second tap hole 104, and then flows out. Wherein the gas channel 102 is adjacent to the liquid channel 101, that is, the gas channel 102 is adjacent to the through channel 112, and the heat exchange liquid effectively exchanges heat with the gas flowing through the gas channel 102 when flowing along the through channel 112 parallel to the axis of the gas channel 102.
Further, the length of the first transverse channel 110 and the second transverse channel 111 corresponds to the width of the gas channel 102. Wherein the width of the gas channel 102 is the length in the direction perpendicular to the axis. It should be understood that the axial direction of the gas channel 102 is the direction of the gas flow.
In an alternative embodiment of the present invention, the first transverse channel 110 and the second transverse channel 111 are parallel and perpendicular to the through channels 112, and the through channels 112 are equally spaced along the axial direction of the first transverse channel 110 and the second transverse channel 111.
In other words, the lengths of the first lateral passage 110 and the second lateral passage 111 are equal to the width of the gas passage 102, and the through passages 112 are uniformly distributed in the width direction of the gas passage 102 for good heat exchange of the gas in the gas passage 102. Wherein each set of first and second flow dividing holes 103, 104 corresponds to a set of liquid channels 101, the number of second transverse channels 111 corresponds to the number of first flow dividing holes 103, and the number of second transverse channels 111 corresponds to the number of second flow dividing holes 104.
In other alternative embodiments of the present invention, the heat exchange core 100 is annular, the upper end of the outer wall of the heat exchange core 100 is equiangularly provided with the first diversion hole 103, the lower end of the outer wall of the heat exchange core 100 is equiangularly provided with the second diversion hole 104, wherein the gas channel 102 is equiangularly provided in the heat exchange core 100.
In another embodiment of the present invention, as shown in fig. 2 and 3, the gas channels 102 and the liquid channels 101 are alternately arranged, and the gas channels 102 include zigzag fins.
Specifically, the gas passage 102 is provided with the zigzag fins to increase the heat exchange area with the liquid passage 101. For example, in some embodiments of the present invention, the heat exchange core 100 is an annular solid body including an inner annular surface and an outer annular surface, between which the gas channel 102 and the liquid channel 101 are disposed. The upper part and the lower part of the outer ring surface are respectively provided with a first diversion hole 103 and a second diversion hole 104, and the gas channel 102 and the liquid channel 101 are distributed in an annular solid body between the inner ring surface and the outer ring surface at equal angles.
The gas passages 102 penetrate up and down along the axial direction of the annular solid body, and a solid liquid passage 101 is arranged between the two gas passages 102. A first lateral passage 110, a second lateral passage 111, and a through passage 112 are provided in the liquid passage 101. The length of the first transverse channel 110 and the second transverse channel 111 is the width of the gas channel 102. In other words, the outer walls of adjacent liquid channels 101 form gas channels 102. Serrated fins are provided on the outer wall of the liquid passage 101.
In another alternative embodiment of the present invention, as shown in fig. 4 and 5, the gas channels 102 and the liquid channels 101 are alternately arranged, and the gas channels 102 include gas flow holes 113.
In other words, between the adjacent gas channels 102 are the liquid channels 101, and the gas channels 102 may employ uniformly distributed gas flow holes 113 along the direction of the first transverse channel 110, where the gas flow holes 113 penetrate the upper and lower surfaces of the heat exchange core 100.
For example, in some embodiments of the present invention, the heat exchange core 100 is an annular solid body including an inner annular surface and an outer annular surface, between which the gas channel 102 and the liquid channel 101 are disposed. The upper part and the lower part of the outer ring surface are respectively provided with a first diversion hole 103 and a second diversion hole 104, and the gas channel 102 and the liquid channel 101 are distributed in an annular solid body between the inner ring surface and the outer ring surface at equal angles.
The gas flow holes 113 of the gas passages 102 penetrate up and down along the axial direction of the annular solid body, and the solid liquid passage 101 is arranged between the two gas passages 102. A first lateral passage 110, a second lateral passage 111, and a through passage 112 are provided in the liquid passage 101. The length of the first transverse channel 110 and the second transverse channel 111 is the width of the gas channel 102. In other words, one or more sets of air flow holes 113 are provided along the length of the first transverse channel 110, i.e. one or more sets of air flow holes 113 may be provided between adjacent liquid channels 101.
In another embodiment of the present invention, as shown in fig. 6 to 9, the liquid channel 101 is an inner cavity 121 of the heat exchange core 100, the gas channel 102 is an air duct 120, and the air duct 120 is disposed in the inner cavity 121 and penetrates through the inner cavity 121, wherein a first flow dividing hole 103 is formed at one end of the inner cavity 121, and a second flow dividing hole 104 is formed at the other end of the inner cavity 121.
Specifically, the air duct 120 is parallel to the axis of the heat exchange core 100, the heat exchange liquid entering from the liquid inlet channel 200 enters the inner cavity 121 through the first tap hole 103, the air duct 120 in the inner cavity 121 is surrounded by the heat exchange liquid, the heat exchange liquid can fully contact with the air duct 120 to exchange heat, and the heat exchange liquid flows out from the second tap hole 104 after heat exchange. It should be noted that, the central lines of the corresponding first and second diversion holes 103 and 104 are parallel to the air duct 120, so the flow direction of the heat exchange liquid is the axial direction of the air duct 120.
As shown in fig. 9, in some embodiments of the present invention, the heat exchange core 100 includes an inner case 133, an outer case 131, an upper cover plate 130, and a lower cover plate 132. Wherein, the outer shell 131 is sleeved outside the inner shell 133, the upper cover plate 130 and the lower cover plate 132 are connected at the upper end and the lower end of the outer shell 131 and the inner shell 133, the outer shell 131, the upper cover plate 130 and the lower cover plate 132 enclose an annular inner cavity 121, namely the liquid channel 101. The air duct 120 is disposed in the inner cavity 121, and the air duct 120 penetrates through the upper cover plate 130 and the lower cover plate 132, and the air duct 120 is distributed in the inner cavity 121 at equal angles.
As shown in fig. 10, in an alternative embodiment of the present invention, the liquid passage 101 includes first and second partitions 122 and 123, and the first and second partitions 122 and 123 are alternately arranged in the axial direction of the gas-guide tube 120.
Wherein, the first baffle 122 is installed at one side of the inner cavity 121, the extending end of the first baffle 122 is spaced apart from the other side of the inner cavity 121, the second baffle 123 is installed at one side of the inner cavity 121 opposite to the first baffle 122, and the extending end of the second baffle 123 is spaced apart from one side of the inner cavity 121 where the first baffle 122 is located.
In other words, the first separator 122 and the second separator 123 are layered in the inner cavity 121. The width of the first partition 122 is smaller than the width of the inner cavity 121, the first partition 122 is disposed at one side of the inner cavity 121, the width of the second partition 123 is smaller than the width of the inner cavity 121, and the second partition 123 is disposed at the other side of the inner cavity 121.
For example, the heat exchange core 100 includes an inner case 133, an outer case 131, an upper cover plate 130, and a lower cover plate 132. Wherein, the outer shell 131 is sleeved outside the inner shell 133, the upper cover plate 130 and the lower cover plate 132 are connected at the upper end and the lower end of the outer shell 131 and the inner shell 133, the outer shell 131, the upper cover plate 130 and the lower cover plate 132 enclose an annular inner cavity 121, namely the liquid channel 101. The air duct 120 is disposed in the inner cavity 121, and the air duct 120 penetrates through the upper cover plate 130 and the lower cover plate 132, and the air duct 120 is distributed in the inner cavity 121 at equal angles.
One end of the first partition 122 is mounted on the outer case 131, and an extended end of the first partition 122 is spaced apart from the inner case 133; one end of the second partition 123 is mounted on the inner case 133, and an extended end of the second partition 123 is spaced apart from the outer case 131. The first and second baffles 122, 123 are alternately arranged up and down, thereby achieving a Z-shaped run of the heat exchange liquid along the axis of the guide tube. Avoiding the heat exchange fluid flowing only from the outer housing 131 side and less from the inner housing 133 side allows the heat exchange fluid to exchange heat more fully with the heat exchange core 100.
Further, the first partition 122 and the second partition 123 penetrate the air duct 120, and inner and outer rings may be provided in the air duct 120.
In addition, as shown in FIG. 11, in some alternative embodiments of the invention, the interior of the airway tube 120 is provided with zigzag fins.
As shown in fig. 12, the present invention also provides a thermal power conversion system, including a regenerator 300 and the alternating flow heat exchanger of the above embodiment; one end of the regenerator 300 is communicated with one end of the gas channel 102, the liquid inlet channel 200 is close to the regenerator 200, and the liquid outlet channel 210 is far away from the regenerator 300.
In other words, the regenerator 300 communicates with one end of the gas channel 102 where the liquid inlet channel 200 is located, and the gas alternately flows in the gas channel 102. The heat exchange liquid flows into the alternating flow heat exchanger from the end near regenerator 300 and flows out of the alternating flow heat exchanger from the end remote from regenerator 300.
For example, in a heat pump or a refrigerator which needs to consume acoustic power, or in an engine which generates acoustic power, two ends of a heat regenerator are respectively provided with a variable flow heat exchanger, one end of a gas channel of each of the two variable flow heat exchangers is communicated with the heat regenerator, and liquid inlet channels of the two variable flow heat exchangers are close to the heat regenerator.
As shown in fig. 12, an engine heat-power conversion system includes: the heat regenerator 300, a first alternating flow heat exchanger 301, a second alternating flow heat exchanger 302, a linear motor unit 304 and a phase modulator 303 which are arranged at two ends of the heat regenerator 300, wherein one end of the heat regenerator 300 is communicated with one end of a gas channel of the first alternating flow heat exchanger 301, and the other end of the heat regenerator 300 is communicated with one end of a gas channel of the second alternating flow heat exchanger 302. The inlet channel of the first alternating flow heat exchanger 301 is close to the regenerator, as is the inlet channel of the second alternating flow heat exchanger 302.
That is, the heat exchange fluid flows into the first alternating flow heat exchanger 301 and the second alternating flow heat exchanger 302 from the end close to the regenerator 300, and flows out of the first alternating flow heat exchanger 301 and the second alternating flow heat exchanger 302 from the end far from the regenerator 300.
According to the alternating flow heat exchanger provided by the invention, the gas channel penetrating the heat exchange core along the axis direction of the heat exchange core and the liquid channel for exchanging heat of gas are arranged in the heat exchange core, and the first diversion hole communicated with the liquid inlet channel and the second diversion hole communicated with the liquid outlet channel are arranged at the upper end and the lower end of the heat exchange core, so that heat exchange liquid in the liquid channel moves along the axis direction of the gas channel, and further, the non-uniformity of the circumferential temperature distribution in the alternating flow heat exchanger caused by the temperature rise of the heat exchange fluid is reduced, and the heat exchange performance of the alternating flow heat exchanger is improved.
Further, in the heat-power conversion system provided by the invention, since the alternating flow heat exchanger is provided as described above, various advantages as described above are also provided.
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 (10)

1. An alternating flow heat exchanger comprising:
the heat exchange core comprises a gas channel and a liquid channel, the gas channel penetrates through the heat exchange core along the axial direction of the heat exchange core, heat exchange liquid in the liquid channel moves along the axial direction of the gas channel, a first flow dividing hole is formed in one end of the outer wall of the heat exchange core, a second flow dividing hole is formed in the other end of the outer wall of the heat exchange core, and the first flow dividing hole and the second flow dividing hole are communicated with the liquid channel;
the liquid inlet channel is communicated with the first split flow hole;
and the liquid outlet channel is communicated with the second flow dividing hole.
2. The alternating flow heat exchanger of claim 1 wherein the liquid passage comprises a first transverse passage in communication with the first tap hole, a second transverse passage in communication with the second tap hole, and a through passage communicating the first transverse passage and the second transverse passage,
wherein the through passage is parallel to the axial direction of the gas passage.
3. The alternating flow heat exchanger of claim 2 wherein the gas channels and the liquid channels are alternately distributed, the gas channels comprising zigzag fins.
4. The alternating flow heat exchanger of claim 2 wherein the gas channels and the liquid channels are alternately distributed, the gas channels comprising gas flow holes.
5. The alternating flow heat exchanger of claim 1 wherein the axial length of the gas passage is less than the maximum travel of the gas.
6. The alternating flow heat exchanger of claim 1 wherein the liquid passage is an interior cavity of the heat exchange core, the gas passage is an air duct disposed in and extending through the interior cavity,
the first diversion hole is formed in one end of the inner cavity, and the second diversion hole is formed in the other end of the inner cavity.
7. The alternating flow heat exchanger of claim 6 wherein the liquid passage comprises first and second baffles, the first and second baffles being alternately distributed along the axial direction of the gas conduit,
the first partition board is installed on one side of the inner cavity, the extending end of the first partition board is spaced from the other side of the inner cavity, the second partition board is installed on one side of the inner cavity opposite to the first partition board, and the extending end of the second partition board is spaced from one side of the inner cavity where the first partition board is located.
8. The alternating flow heat exchanger as claimed in any one of claims 1 to 7 wherein the heat exchange core is annular, the first flow dividing holes are equiangularly formed in the upper end of the outer wall of the heat exchange core, the second flow dividing holes are equiangularly formed in the lower end of the outer wall of the heat exchange core,
wherein the gas channels are arranged in the heat exchange core at equal angles.
9. The alternating flow heat exchanger of claim 1 wherein the liquid inlet passage is provided with a liquid inlet and the liquid outlet passage is provided with a liquid outlet, a pair of the liquid inlet and the liquid outlet being arranged diagonally on the alternating flow heat exchanger.
10. A thermal power conversion system comprising a regenerator and an alternating flow heat exchanger according to any one of claims 1 to 9;
one end of the heat regenerator is communicated with one end of the gas channel, the liquid inlet channel is close to the heat regenerator, and the liquid outlet channel is far away from the heat regenerator.
CN202111501509.0A 2021-12-09 2021-12-09 Alternating flow heat exchanger and heat power conversion system Pending CN116255844A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202111501509.0A CN116255844A (en) 2021-12-09 2021-12-09 Alternating flow heat exchanger and heat power conversion system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202111501509.0A CN116255844A (en) 2021-12-09 2021-12-09 Alternating flow heat exchanger and heat power conversion system

Publications (1)

Publication Number Publication Date
CN116255844A true CN116255844A (en) 2023-06-13

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202111501509.0A Pending CN116255844A (en) 2021-12-09 2021-12-09 Alternating flow heat exchanger and heat power conversion system

Country Status (1)

Country Link
CN (1) CN116255844A (en)

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