CN113865402B - Heat exchanger of regenerative heat engine and regenerative heat engine - Google Patents
Heat exchanger of regenerative heat engine and regenerative heat engine Download PDFInfo
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- CN113865402B CN113865402B CN202010621607.7A CN202010621607A CN113865402B CN 113865402 B CN113865402 B CN 113865402B CN 202010621607 A CN202010621607 A CN 202010621607A CN 113865402 B CN113865402 B CN 113865402B
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- heat exchange
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- heat exchanger
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- 230000001172 regenerating effect Effects 0.000 title claims description 17
- 239000012530 fluid Substances 0.000 claims abstract description 139
- 239000013529 heat transfer fluid Substances 0.000 claims abstract description 56
- 229910001338 liquidmetal Inorganic materials 0.000 claims description 11
- 239000010935 stainless steel Substances 0.000 claims description 7
- 230000000149 penetrating effect Effects 0.000 claims description 6
- 229910000851 Alloy steel Inorganic materials 0.000 claims description 4
- 229910001220 stainless steel Inorganic materials 0.000 claims description 4
- 239000011229 interlayer Substances 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 238000007789 sealing Methods 0.000 abstract description 3
- 239000007789 gas Substances 0.000 description 63
- 239000010410 layer Substances 0.000 description 18
- 239000000306 component Substances 0.000 description 12
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 10
- 230000000712 assembly Effects 0.000 description 7
- 238000000429 assembly Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 7
- 238000003466 welding Methods 0.000 description 7
- 239000002184 metal Substances 0.000 description 6
- 229910052786 argon Inorganic materials 0.000 description 5
- 238000005219 brazing Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000010894 electron beam technology Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 150000003839 salts Chemical class 0.000 description 3
- 229910001256 stainless steel alloy Inorganic materials 0.000 description 3
- 229910001067 superalloy steel Inorganic materials 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 2
- 239000008358 core component Substances 0.000 description 2
- 239000001307 helium Substances 0.000 description 2
- 229910052734 helium Inorganic materials 0.000 description 2
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- 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
- F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
- F28D21/0001—Recuperative heat exchangers
- F28D21/0014—Recuperative heat exchangers the heat being recuperated from waste air or from vapors
-
- 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
- F28F9/26—Arrangements for connecting different sections of heat-exchange elements, e.g. of radiators
- F28F9/262—Arrangements for connecting different sections of heat-exchange elements, e.g. of radiators for radiators
- F28F9/268—Arrangements for connecting different sections of heat-exchange elements, e.g. of radiators for radiators by permanent joints, e.g. by welding
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The invention relates to the technical field of heat exchange, and provides a heat exchanger of a recuperative heat engine and the recuperative heat engine, wherein the heat exchanger of the recuperative heat engine comprises a shell, a shell and a heat exchanger, wherein an accommodating cavity is formed in the shell; the heat exchange assembly is arranged in the accommodating cavity and comprises a plurality of heat exchange cylinders sleeved with each other, fluid channels for heat transfer fluid circulation are formed between two adjacent heat exchange cylinders, and a gas channel for gas working medium circulation is arranged in the cylinder wall of each heat exchange cylinder. The heat exchanger of the recuperative heat engine provided by the invention has the advantages of simple structure, convenience in manufacturing, good sealing performance, high safety performance, long service life, integrated structure, no redundant parts, long flow path of an interlayer flow channel of the heat transfer fluid, small pressure drop loss of the heat transfer fluid and effective improvement of heat exchange efficiency of the heat exchanger, and realizes efficient heat exchange between the external heat transfer fluid and the working medium inside the recuperative heat engine.
Description
Technical Field
The invention relates to the technical field of heat exchange, in particular to a heat exchanger of a recuperative heat engine and the recuperative heat engine.
Background
An important external combustion type heat engine of the regenerative heat engine mainly comprises technical forms of a Stirling heat engine, a thermoacoustic heat engine, a VM (Vuilleumier) heat engine and the like. The regenerative heat engine constructs a working temperature zone through a divided high-low temperature heat exchanger, transmits external heat to an internal high-pressure gas working medium, and realizes heat-work conversion by using a core component, namely a regenerator, so as to convert the external heat into mechanical energy. Based on the characteristics of external combustion, high-pressure tightness and the like of the regenerative heat engine, the regenerative heat engine has important application prospect in the fields of solar photo-thermal power generation, combined cooling, heating, power generation, space power supply and the like.
The basic structure of the regenerative heat engine mainly comprises a heat-power conversion unit and a phase modulation unit, wherein the ejector is the phase modulation unit. The heat-work conversion unit as a core component mainly comprises a high-temperature heat exchanger, a heat regenerator and a low-temperature heat exchanger which are in sandwich assembly structures. At present, a high-temperature heat exchanger and a low-temperature heat exchanger of the regenerative heat engine generally adopt partition wall structures, and mainly adopt shell and tube type and plate-fin type structural forms. The plate-fin heat exchanger generally adopts an inner fin structure, an outer fin structure and an inner fin structure, wherein the inner fin structure exchanges heat with the heat engine gas working medium, and the outer fin structure exchanges heat with the heat transfer fluid. In principle, both heat exchanger structures can be used for high and low temperature heat exchangers of a recuperative heat engine, but the heat exchanger structure selected for practical application depends on the heat exchange temperature, the heat exchange power and the characteristics of the heat transfer fluid. It is common to use plate fins at low heat transfer rates and shell and tube at high heat transfer rates. For common heat exchange fluids such as water, heat conduction oil and molten salt, the two heat exchanger structures are suitable, and for special heat exchange fluids such as heat transfer fluid, the shell-and-tube heat exchanger has higher potential safety hazard due to more welding spots, and the plate-fin heat exchanger has higher safety, but cannot meet the high-efficiency heat exchange requirement under high heat exchange quantity.
The present invention has been made in view of the above.
Disclosure of Invention
The present invention aims to solve at least one of the technical problems existing in the prior art. For this purpose, the invention proposes a heat exchanger of a recuperative heat engine.
The invention also provides a regenerative heat engine.
According to an embodiment of the first aspect of the invention, a heat exchanger of a recuperative heat engine comprises:
a housing having an accommodating chamber formed therein;
the heat exchange assembly is arranged inside the accommodating chamber;
The heat exchange assembly comprises a plurality of heat exchange cylinders which are sleeved with each other;
A fluid channel for circulating heat transfer fluid is formed between two adjacent heat exchange cylinders;
and a gas channel for circulating a gas working medium is arranged in the wall of each heat exchange cylinder.
According to one embodiment of the invention, the top and the bottom of each heat exchange cylinder are welded with the top and the bottom of the adjacent heat exchange cylinder respectively to form an integrated structure;
The two heat exchange cylinders are welded to form an integral top and bottom, and the walls of the adjacent two heat exchange cylinders opposite to each other surround to form the fluid channel for the heat transfer fluid to circulate.
Specifically, after every two layers of nested heat exchange cylinders are nested, the upper part and the lower part of the adjacent heat exchange cylinders are welded to form an integrated structure, and a cylindrical hollow area formed between the two coaxial metal cylinders is a fluid channel for heat transfer fluid to circulate.
According to one embodiment of the invention, the wall thickness of the middle portion of the heat exchange cartridge wall is smaller than the wall thickness of the top and bottom portions of the heat exchange cartridge wall.
Specifically, the wall thickness of the middle wall of the heat exchange tube is smaller than that of the two ends along the axial direction, and the arrangement mode is convenient for forming a fluid channel between two adjacent heat exchange tubes.
According to one embodiment of the invention, the heat exchange tube is mainly made of stainless steel or superalloy steel.
Specifically, the material of the heat exchange tube is set to be stainless steel or high-temperature alloy steel which is incompatible with the heat transfer fluid, so that the fluid channel formed by the heat exchange tube can realize heat exchange of special heat exchange fluid.
In one embodiment, the heat exchange cylinders are I-shaped coaxial metal cylinders with thick upper and lower ends and thin middle, and after every two layers of heat exchange cylinders are nested, the thick upper and lower ends are connected by high-temperature brazing, argon arc welding or electron beam welding.
According to one embodiment of the invention, a plurality of through holes penetrating through the wall of the heat exchange cylinder are uniformly distributed on the end surface of the wall of the heat exchange cylinder;
the track of the through hole in the wall of the heat exchange cylinder forms the gas channel for the circulation of the gas working medium.
Specifically, through the two end surfaces of the heat exchange cylinder, a plurality of through holes are uniformly distributed along the axial direction, a gas channel is provided for the gas working medium to enter and exit the heat exchanger, and the heat exchange area between the gas working medium and the heat transfer fluid is increased.
According to one embodiment of the invention, the heat transfer fluid comprises at least liquid metal.
The heat transfer fluid may be any fluid having good heat conductivity including liquid metal.
Specifically, heat-conducting fluid such as liquid metal can realize heat exchange in the heat exchanger provided by the invention, and meanwhile, the safe and stable operation of the heat exchanger is ensured, and the requirement of efficient heat exchange is met.
According to one embodiment of the invention, the housing is provided with a fluid inlet and a fluid outlet;
the heat transfer fluid flows into the fluid channel from the fluid inlet, exchanges heat with the gas working medium in the gas channel, and flows out from the fluid outlet.
Specifically, the fluid inlet and the fluid outlet are respectively welded with the shell, the fluid inlet and the fluid outlet are collinear in the axial direction, the fluid inlet, the fluid channel and the fluid outlet form channels for heat transfer fluid to enter and exit the heat exchanger, and the fluid channels are uniformly distributed in multiple layers, so that the heat exchange can be fully and uniformly realized with the gas working medium in the gas channel, and the requirement of efficient heat exchange is met.
According to one embodiment of the invention, the shell is arranged in a cylindrical shape, one end of the shell is provided with an end cover, and a group of heat exchange assemblies are arranged inside the shell;
Wherein the axial direction of the heat exchange cylinder and the axial direction of the shell are arranged in the same direction;
an inlet channel communicated with each layer of the fluid channels is arranged in the fluid inlet;
the fluid outlet is internally provided with an outlet channel communicated with each layer of the fluid channel.
Specifically, an embodiment of single-side heat exchange is provided, one side is provided with an end cover, one side is opened, a gas working medium enters the shell from the opening part through the conveying device, and then the gas working medium enters the gas channel to realize heat exchange with heat transfer fluid in the fluid channel.
According to one embodiment of the invention, the shell is arranged in a cylindrical shape, and at least two groups of heat exchange assemblies are arranged in the shell at intervals;
Wherein the axial direction of the heat exchange cylinder and the axial direction of the shell are arranged in the same direction;
The inside of the fluid inlet is provided with inlet channels corresponding to each group of heat exchange assemblies, and the inlet channels are communicated with each layer of fluid channels in the corresponding heat exchange assemblies;
The fluid outlet is internally provided with outlet channels corresponding to each group of heat exchange assemblies, and the outlet channels are communicated with each layer of fluid channels in the corresponding heat exchange assemblies.
Specifically, an embodiment of double-side heat exchange is provided, two groups of heat exchange components are arranged in a shell, two sides of the shell along the axial direction are arranged in an open mode, a gas working medium enters the shell from the open part through a conveying device, then the gas working medium enters a gas channel in each group of heat exchange components, and heat exchange with heat transfer fluid in the fluid channel is achieved.
According to a second aspect of the present invention, a recuperator comprises a recuperator of the recuperator.
The heat exchanger has the advantages of simple structure, convenient manufacture, high sealing performance, high safety performance and long service life, and effectively improves the heat exchange efficiency of the heat exchanger, along with high efficiency, high tightness, high safety, long service life and no unnecessary parts, long flow path of an interlayer flow channel of the heat transfer fluid, and low pressure drop loss of the heat transfer fluid.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions of the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are some embodiments of the present 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 first schematic diagram of the overall assembly relationship of a recuperator provided by an embodiment of the present invention;
FIG. 2 is a second schematic diagram of the overall assembly relationship of a recuperator provided by an embodiment of the present invention;
FIG. 3 is a third schematic diagram of the overall assembly relationship of a recuperator provided by an embodiment of the present invention;
FIG. 4 is a fourth schematic diagram of the overall assembly relationship of a recuperator provided by an embodiment of the present invention;
FIG. 5 is an enlarged schematic view of section A in FIG. 4 of the overall assembly relationship of a recuperative heat engine heat exchanger provided by an embodiment of the present invention;
FIG. 6 is a first schematic diagram of the overall assembly relationship of a recuperator provided in an embodiment of the present invention;
FIG. 7 is a second schematic diagram of the overall assembly relationship of a recuperator provided in an embodiment of the present invention;
FIG. 8 is a third schematic diagram of the overall assembly relationship of a recuperator provided in an embodiment of the present invention;
fig. 9 is an enlarged schematic view of portion B in fig. 8 of the overall assembly relationship of the recuperator provided by an embodiment of the present invention.
Reference numerals:
1, a shell, 101, a fluid inlet, 102, a fluid outlet, 103, an end cover, 104, an inlet channel and 105, an outlet channel;
2, a heat exchange cylinder;
3, through holes.
It should be noted that these drawings and the written description are not intended to limit the scope of the inventive concept in any way, but to illustrate the inventive concept to those skilled in the art by referring to the specific embodiments.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. 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.
Fig. 1 to 5 are enlarged schematic views of a first, a second, a third, a fourth and a portion of an overall assembly relationship of a recuperator for a heat engine according to an embodiment of the present invention. As can be seen from fig. 1 to 5, the heat exchanger provided by the present invention includes a housing 1, and an end cover 103 disposed at one end of the housing 1, and the other end of the housing 1 is disposed open. The casing 1 is provided with a fluid inlet 101 and a fluid outlet 102, and as a preferred technical scheme, the fluid inlet 101 and the fluid outlet 102 are symmetrically arranged at two sides of the casing 1.
Further, a heat exchange assembly is arranged in the shell 1, the heat exchange assembly comprises a plurality of heat exchange cylinders 2 which are sleeved with each other, a fluid channel is formed between every two heat exchange cylinders 2, a gas channel for gas working medium to circulate is arranged on the cylinder wall of each heat exchange cylinder 2, heat transfer fluid enters the fluid channel from the fluid inlet 101, and after the heat exchange is fully carried out between the fluid channel and the gas working medium in the gas channel, the heat transfer fluid flows out from the fluid outlet 102.
Further, the fluid inlet 101 and the fluid outlet 102 on the housing 1 are communicated with the fluid channels of each layer, that is, the heat exchange tubes 2 at the rest positions except the heat exchange tube 2 at the innermost layer are provided with notches corresponding to the fluid inlet 101 and the fluid outlet 102, the notches form an inlet channel 104 at the fluid inlet 101 side of the housing 1, and an outlet channel 105 at the fluid outlet 102 side.
Further, through holes 3 penetrating through the top and the bottom are formed in the wall of the heat exchange tube 2, and the through holes 3 form a gas channel in the wall of the heat exchange tube 2.
Further, as can be seen from the enlarged schematic view of the portion a of fig. 5, each heat exchange tube 2 has an i-shaped structure with a wide top and a narrow bottom and a narrow middle. After the adjacent two heat exchange cylinders 2 are nested, the two heat exchange cylinders are welded together.
Fig. 6 to 9 are enlarged schematic views of the first, second, third and B parts of the overall assembly relationship of the recuperator provided in the embodiment of the present invention. As can be seen from fig. 6 to 9, the heat exchanger running to sell to you comprises a housing 1 and two sets of heat exchange components arranged inside the housing 1. The casing 1 is provided with a fluid inlet 101 and a fluid outlet 102, and as a preferred technical scheme, the fluid inlet 101 and the fluid outlet 102 are symmetrically arranged at two sides of the casing 1.
Further, each group of heat exchange components comprises a plurality of heat exchange cylinders 2 which are mutually sleeved, a fluid channel is formed between every two heat exchange cylinders 2, a gas channel for gas working medium to circulate is arranged on the cylinder wall of each heat exchange cylinder 2, heat transfer fluid enters the fluid channel from the fluid inlet 101, and after the heat exchange is fully carried out between the fluid channel and the gas working medium in the gas channel, the heat transfer fluid flows out from the fluid outlet 102.
Further, the fluid inlet 101 and the fluid outlet 102 on the housing 1 are communicated with the fluid channels of each layer, that is, the heat exchange tubes 2 at the rest positions except the heat exchange tube 2 at the innermost layer are provided with notches corresponding to the fluid inlet 101 and the fluid outlet 102, the notches form an inlet channel 104 at the fluid inlet 101 side of the housing 1, and an outlet channel 105 at the fluid outlet 102 side.
As a preferred solution, as shown in fig. 7, each fluid inlet 101 corresponds to a different heat exchange assembly, and is formed with an independent inlet channel 104, and each fluid outlet 102, which is the same, corresponds to a different heat exchange assembly, and is formed with an independent outlet channel 105.
Further, through holes 3 penetrating through the top and the bottom are formed in the wall of the heat exchange tube 2, and the through holes 3 form a gas channel in the wall of the heat exchange tube 2.
Further, as can be seen from the enlarged schematic view of part B of fig. 9, each heat exchange tube 2 in each group of heat exchange assemblies has an i-shaped structure with a wide top and bottom and a narrow middle. After the adjacent two heat exchange cylinders 2 are nested, the two heat exchange cylinders are welded together.
In general, the invention has simple structure and convenient manufacture, realizes the high-efficiency heat exchange between the external heat transfer fluid and the working medium in the regenerative heat engine, has good sealing property, high safety performance and long service life, and the heat exchanger is of an integrated structure, has no redundant parts, has long flow path of an interlayer flow channel of the heat transfer fluid, has small pressure drop loss of the heat transfer fluid and effectively improves the heat exchange efficiency of the heat exchanger.
In describing embodiments of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the terms "connected," "connected," and "coupled" should be construed broadly, and may be, for example, fixedly connected, detachably connected, integrally connected, mechanically connected, electrically connected, directly connected, or indirectly connected via 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 embodiments of the invention, unless expressly specified and limited otherwise, a first feature "up" or "down" on a second feature may be that the first and second features are in direct contact, or that the first and second features are in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
In one embodiment, as shown in fig. 1 to 5, the embodiment provides a heat exchanger of a recuperative heat engine, which comprises a shell 1, a heat exchange assembly, a plurality of heat exchange cylinders 2, a fluid channel and a gas channel, wherein the accommodating chamber is formed in the shell 1, the heat exchange assembly is arranged in the accommodating chamber, the heat exchange assembly comprises the plurality of heat exchange cylinders 2 which are sleeved with each other, the fluid channel is formed between two adjacent heat exchange cylinders 2 and used for flowing heat transfer fluid, and the gas channel is arranged in the wall of each heat exchange cylinder 2 and used for flowing gas working medium.
In one embodiment of the present embodiment, as shown in fig. 2 to 4, the top and bottom of each heat exchange tube 2 are welded to the top and bottom of the adjacent heat exchange tube 2, respectively, to form an integral structure, the two heat exchange tubes 2 are welded to form an integral top and bottom, and the tube walls of the adjacent two heat exchange tubes opposite to each other enclose a fluid passage for the flow of a heat transfer fluid.
Specifically, after every two layers of nested heat exchange cylinders 2 are nested, the upper part and the lower part of the adjacent heat exchange cylinders 2 are welded to form an integrated structure, and a cylindrical hollow area formed between the two coaxial metal cylinders is a fluid channel for heat transfer fluid to circulate.
In one embodiment of the present invention, as shown in fig. 4 and 5, the wall thickness of the middle portion of the wall of the heat exchange tube 2 is smaller than the wall thickness of the top and bottom portions of the wall of the heat exchange tube 2.
Specifically, the wall thickness of the heat exchange tube 2 is smaller than that of the two ends along the axial direction, and the arrangement mode is convenient for forming a fluid channel between two adjacent heat exchange tubes 2.
In one embodiment of the present embodiment, the heat exchange tube 2 is made mainly of stainless steel or superalloy steel.
Specifically, the heat exchange tube 2 is made of stainless steel or high-temperature alloy steel which is incompatible with the heat transfer fluid, so that the fluid channel formed by the heat exchange tube 2 can realize heat exchange of special heat exchange fluid.
In one example of this embodiment, as shown in fig. 4 and 5, the heat exchange tube 2 is an i-shaped coaxial metal tube with thick upper and lower ends and thin middle, and after each two layers of heat exchange tubes 2 are nested, the two heat exchange tubes 2 are connected by high-temperature brazing, argon arc welding or electron beam welding at the thick upper and lower ends.
In one embodiment of the present embodiment, as shown in fig. 2 to 5, a plurality of through holes 3 penetrating the wall of the heat exchange tube 2 are uniformly distributed on the end surface of the wall of the heat exchange tube 2, and the track of the through holes 3 in the wall of the heat exchange tube 2 forms a gas channel through which the gas working medium flows.
Specifically, through the two end surfaces of the heat exchange cylinder 2, a plurality of through holes 3 are uniformly distributed along the axial direction, a gas channel is provided for the gas working medium to enter and exit the heat exchanger, and the heat exchange area between the gas working medium and the heat transfer fluid is increased.
The coaxial heat exchange tubes 2 of each layer are uniformly provided with through holes 3 in the axial direction. The diameter of the through hole 3 is not larger than the wall thickness of the coaxial heat exchange cylinder 2, the through hole 3 is fluid which exchanges heat with heat transfer fluid in the heat exchanger, and gas working media can be but not limited to working media gas of a regenerative heat engine such as helium, argon and the like, and the working pressure is between 3 and 20 MPa.
In one embodiment of the present embodiment, the heat transfer fluid comprises at least a liquid metal.
The heat transfer fluid may be any fluid having good heat conductivity including liquid metal.
Specifically, heat-conducting fluid such as liquid metal can realize heat exchange in the heat exchanger provided by the invention, and meanwhile, the safe and stable operation of the heat exchanger is ensured, and the requirement of efficient heat exchange is met.
It should be noted that the heat transfer fluid includes, but is not limited to, liquid metal, water, heat transfer oil, molten salt, etc., and the operating temperature of the heat transfer fluid is not more than 800 ℃.
In one embodiment of the present embodiment, as shown in fig. 3 to 5, a fluid inlet 101 and a fluid outlet 102 are provided in the housing 1, and a heat transfer fluid flows into the fluid channel from the fluid inlet 101, exchanges heat with the gas working medium in the gas channel, and flows out from the fluid outlet 102.
Specifically, the fluid inlet 101 and the fluid outlet 102 are welded with the shell 1 respectively, the fluid inlet 101 and the fluid outlet 102 are collinear in the axial direction, the fluid inlet 101, the fluid channel and the fluid outlet 102 form channels for heat transfer fluid to enter and exit the heat exchanger, and the fluid channels are uniformly distributed in multiple layers, so that sufficient and uniform heat exchange can be realized with gas working media in the gas channels, and the requirement of efficient heat exchange is met.
In one embodiment of the present embodiment, as shown in fig. 1, the casing 1 is provided with a cylindrical shape, one end of the casing is provided with an end cover 103, and a group of heat exchange components are arranged inside the casing, wherein the axial direction of the heat exchange cylinder 2 is arranged in the same direction as the axial direction of the casing 1, an inlet channel 104 communicated with each fluid channel is arranged inside the fluid inlet 101, and an outlet channel 105 communicated with each fluid channel is arranged inside the fluid outlet 102.
Specifically, an embodiment of single-side heat exchange is provided, one side is provided with an end cover 103, one side is opened, a gas working medium enters the shell 1 from the opening part through the conveying device, and then the gas working medium enters the gas channel to realize heat exchange with the heat transfer fluid in the fluid channel.
In one embodiment, as shown in fig. 6 to 9, the embodiment provides a heat exchanger of a recuperative heat engine, which comprises a shell 1, a heat exchange assembly, a plurality of heat exchange cylinders 2, a fluid channel and a gas channel, wherein the accommodating chamber is formed in the shell 1, the heat exchange assembly is arranged in the accommodating chamber, the heat exchange assembly comprises the plurality of heat exchange cylinders 2 which are sleeved with each other, the fluid channel is formed between two adjacent heat exchange cylinders 2 and used for flowing heat transfer fluid, and the gas channel is arranged in the wall of each heat exchange cylinder 2 and used for flowing gas working medium.
In one embodiment of the present embodiment, as shown in fig. 6 to 8, the top and bottom of each heat exchange tube 2 are welded to the top and bottom of the adjacent heat exchange tube 2, respectively, to form an integral structure, the two heat exchange tubes 2 are welded to form an integral top and bottom, and the tube walls of the adjacent two heat exchange tubes opposite to each other enclose a fluid passage for the flow of a heat transfer fluid.
Specifically, after the heat exchange cylinders 2 of every two layers of TONG are nested, the upper parts and the lower parts of the adjacent heat exchange cylinders 2 are welded to form an integrated structure, and a cylindrical hollow area formed between the two coaxial metal cylinders is a fluid channel for heat transfer fluid to circulate.
In one embodiment of the present invention, as shown in fig. 8 and 9, the wall thickness of the middle portion of the wall of the heat exchange tube 2 is smaller than the wall thickness of the top and bottom portions of the wall of the heat exchange tube 2.
Specifically, the wall thickness of the heat exchange tube 2 is smaller than that of the two ends along the axial direction, and the arrangement mode is convenient for forming a fluid channel between two adjacent heat exchange tubes 2.
In one embodiment of the present embodiment, the heat exchange tube 2 is made mainly of stainless steel or superalloy steel.
Specifically, the heat exchange tube 2 is made of stainless steel or high-temperature alloy steel which is incompatible with the heat transfer fluid, so that the fluid channel formed by the heat exchange tube 2 can realize heat exchange of special heat exchange fluid.
In one example of this embodiment, as shown in fig. 8 and 9, the heat exchange tube 2 is an i-shaped coaxial metal tube with thick upper and lower ends and thin middle, and after each two layers of heat exchange tubes 2 are nested, the two heat exchange tubes 2 are connected by high-temperature brazing, argon arc welding or electron beam welding at the thick upper and lower ends.
In one embodiment of the present embodiment, as shown in fig. 6 to 9, a plurality of through holes 3 penetrating through the wall of the heat exchange tube 2 are uniformly distributed on the end surface of the wall of the heat exchange tube 2, and the track of the through holes 3 in the wall of the heat exchange tube 2 forms a gas channel through which the gas working medium flows.
Specifically, through the two end surfaces of the heat exchange cylinder 2, a plurality of through holes 3 are uniformly distributed along the axial direction, a gas channel is provided for the gas working medium to enter and exit the heat exchanger, and the heat exchange area between the gas working medium and the heat transfer fluid is increased.
The coaxial heat exchange tubes 2 of each layer are uniformly provided with through holes 3 in the axial direction. The diameter of the through hole 3 is not larger than the wall thickness of the coaxial heat exchange cylinder 2, the through hole 3 is fluid which exchanges heat with heat transfer fluid in the heat exchanger, and gas working media can be but not limited to working media gas of a regenerative heat engine such as helium, argon and the like, and the working pressure is between 3 and 20 MPa.
In one embodiment of the present embodiment, the heat transfer fluid comprises at least a liquid metal.
Specifically, the liquid metal can realize heat exchange in the heat exchanger provided by the invention, and meanwhile, the safe and stable operation of the heat exchanger is ensured, and the requirement of high-efficiency heat exchange is met.
It should be noted that the heat transfer fluid includes, but is not limited to, liquid metal, water, heat transfer oil, molten salt, etc., and the operating temperature of the heat transfer fluid is not more than 800 ℃.
In one embodiment of the present embodiment, as shown in fig. 7 to 9, a fluid inlet 101 and a fluid outlet 102 are provided in the housing 1, and a heat transfer fluid flows into the fluid channel from the fluid inlet 101, exchanges heat with the gas working medium in the gas channel, and flows out from the fluid outlet 102.
Specifically, the fluid inlet 101 and the fluid outlet 102 are welded with the shell 1 respectively, the fluid inlet 101 and the fluid outlet 102 are collinear in the axial direction, the fluid inlet 101, the fluid channel and the fluid outlet 102 form channels for heat transfer fluid to enter and exit the heat exchanger, and the fluid channels are uniformly distributed in multiple layers, so that sufficient and uniform heat exchange can be realized with gas working media in the gas channels, and the requirement of efficient heat exchange is met.
In one embodiment of the present embodiment, as shown in fig. 6 to 9, the casing 1 is in a cylindrical shape, at least two groups of heat exchange components are arranged at intervals inside, wherein the axial direction of the heat exchange cylinder 2 is arranged in the same direction as the axial direction of the casing 1, the fluid inlet 101 is internally provided with an inlet channel 104 corresponding to each group of heat exchange components, the inlet channel 104 is arranged in the corresponding heat exchange component and is communicated with each layer of fluid channel, the fluid outlet 102 is internally provided with an outlet channel 105 corresponding to each group of heat exchange components, and the outlet channel 105 is arranged in the corresponding heat exchange component and is communicated with each layer of fluid channel.
Specifically, an embodiment of double-side heat exchange is provided, two groups of heat exchange components are arranged in the shell 1, two sides of the shell 1 along the axial direction are arranged in an open mode, a gas working medium enters the shell 1 from the open part through the conveying device, then the gas working medium enters a gas channel in each group of heat exchange components, and heat exchange with heat transfer fluid in the fluid channel is achieved.
It should be noted that the embodiments shown in fig. 1 to 5 and the embodiments shown in fig. 6 to 9 may be combined with each other to constitute other embodiments not shown in the drawings. In other words, fig. 1 to 5 and fig. 6 to 9 are only schematic and do not make strict embodiment distinction.
In one embodiment, there is also provided a recuperative heat engine comprising a heat exchanger of a recuperative heat engine as described above.
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.
The above embodiments are only for illustrating the present invention, and are not limiting of the present invention. While the invention has been described in detail with reference to the embodiments, those skilled in the art will appreciate that various combinations, modifications, or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and it is intended to be covered by the scope of the claims of the present invention.
Claims (7)
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| JPH0942790A (en) * | 1995-07-28 | 1997-02-14 | Mitsubishi Electric Corp | Heat exchanger of thermal driving type heat pump device |
| JPH11223401A (en) * | 1998-02-09 | 1999-08-17 | Sanyo Electric Co Ltd | Heat exchanger for heat engine |
| JP4958935B2 (en) * | 2009-04-13 | 2012-06-20 | 三菱電機株式会社 | Dehumidifying air conditioner |
| CN104457343B (en) * | 2014-12-15 | 2016-08-17 | 洛阳瑞昌石油化工设备有限公司 | A kind of tubular arc heat exchange plate type heat-exchanger rig |
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