Shell-and-tube countercurrent heat exchanger structure suitable for compressed air energy storage system
By employing a spiral-designed shell-and-tube counter-current heat exchanger and baffle structure in the compressed air energy storage system, the problem of low heat exchange efficiency was solved, achieving more efficient heat transfer and improved turbine performance.
Patent Information
- Application Number
- CN202422125337.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-29
- Publication Date
- 2025-10-24
- Estimated Expiration
- 2034-08-29
Smart Images
Figure CN223470523U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of heat exchangers, and in particular to a shell and tube countercurrent heat exchanger structure suitable for a compressed air energy storage system. Background Art
[0002] In related technologies, the heat exchanger is one of the important subsystems in the compressed air energy storage system. It needs to fully absorb the compression heat generated by the compressor when the compressor is working and store the heat in the heat storage medium. When the turbine is working, the heat stored in the heat storage medium will be used by the heat exchanger to heat the air in the chamber to improve the working capacity of the turbine. By improving the heat exchange efficiency of the heat exchanger, the working capacity of the turbine can be effectively improved. Therefore, how to optimize the heat exchanger structure and improve the heat exchange efficiency has become a problem that needs to be solved urgently in this field. Utility Model Content
[0003] The present invention aims to address at least one of the technical problems existing in the prior art. To this end, one objective of the present invention is to provide a shell-and-tube counterflow heat exchanger structure suitable for a compressed air energy storage system. By configuring the compressed medium pipeline to spirally extend from one end of the shell to the other, the heat exchanger increases the contact area between the compressed medium pipeline and the heat exchange medium, thereby improving the heat exchange efficiency of the heat exchanger.
[0004] According to the utility model, the shell and tube countercurrent heat exchanger structure suitable for the compressed air energy storage system includes: a shell, a heat exchange cavity suitable for accommodating a heat exchange medium is formed in the shell, and an inlet and an outlet are arranged at intervals in the extension direction of the heat exchange cavity; a compressed medium pipeline, the compressed medium pipeline is accommodated in the heat exchange cavity, a channel for circulating the compressed medium is formed in the compressed medium pipeline, and the compressed medium pipeline extends spirally from one end of the shell to the other end.
[0005] According to the shell and tube countercurrent heat exchanger structure suitable for the compressed air energy storage system of the utility model, the compressed medium pipeline is constructed to extend spirally from one end of the shell to the other end. Compared with the straight pipe structure of the prior art, the contact area between the compressed medium pipeline and the heat exchange medium is increased, the flow resistance of the compressed medium is reduced, and the heat exchange efficiency of the heat exchanger is improved.
[0006] According to some embodiments of the present invention, the compressed medium pipeline is constructed in multiple ways, at least two of the compressed medium pipelines are constructed as double helix structures around a rotation axis, and the rotation axis is parallel to the axis of the shell, or at least two of the compressed medium pipelines are constructed as double helix structures around the axis of the shell.
[0007] According to some embodiments of the present application, a plurality of first through holes and second through holes suitable for the compressed medium pipelines to pass through are formed at the two ends of the shell; wherein, at least two first through holes are arranged adjacently to allow two compressed medium pipelines in double helix structure to enter the heat exchange cavity; and / or at least two second through holes are arranged adjacently to allow two compressed medium pipelines in double helix structure to lead out of the heat exchange cavity.
[0008] According to some embodiments of the present application, the plurality of compressed medium pipelines are arranged symmetrically around the axis center of the shell.
[0009] According to some embodiments of the present application, the compressed medium in the compressed medium pipeline flows in a first direction, the heat exchange medium in the heat exchange cavity flows in a second direction, and the first direction is opposite to the second direction.
[0010] According to some embodiments of the present application, the heat exchanger further comprises: baffles arranged in the heat exchange cavity and configured as a plurality of baffles spaced apart between the inlet and the outlet and arranged in a radial direction.
[0011] According to some embodiments of the present application, the plurality of baffles are arranged in parallel with each other and perpendicular to the axis of the shell, wherein one of the two adjacent baffles is spaced apart from one side of the inner wall of the heat exchange cavity, and the other of the two adjacent baffles is spaced apart from the other side of the inner wall of the heat exchange cavity.
[0012] According to some embodiments of the present application, the baffles are connected with the compressed medium pipelines to support the compressed medium pipelines.
[0013] According to some embodiments of the present application, the inlet and the outlet extend in the radial direction of the shell or extend in the axial direction of the shell, respectively.
[0014] Additional aspects and advantages of the present application will be given in part in the following description, become apparent from the following description, or be understood through practice of the present application. BRIEF DESCRIPTION OF DRAWINGS
[0015] The above and / or additional aspects and advantages of the present application will become apparent and more readily appreciated from the following description, taken in conjunction with the following drawings, in which:
[0016] Figure 1 is a structural schematic diagram of a heat exchanger according to an embodiment of the present application;
[0017] Figure 2 is a layout schematic diagram of a compressed medium pipeline of a heat exchanger according to an embodiment of the present application.
[0018] Reference signs:
[0019] Heat exchanger 1;
[0020] Housing 11, heat exchange cavity 111, inlet 112, outlet 113; compressed medium pipeline 12;
[0021] First via hole 131, second via hole 132; baffle plate 14. DETAILED DESCRIPTION
[0022] The embodiments of the present application are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference signs represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present application, and cannot be understood as a limitation of the present application.
[0023] In the related art, the heat exchanger is one of the important subsystems in the compressed air energy storage system, which needs to fully absorb the compression heat generated by the compressor when the compressor is working and save the heat in the heat storage medium. When the turbine works, the heat stored in the heat storage medium will be used by the heat exchanger to heat the air in the chamber to improve the work capacity of the turbine. By improving the heat exchange efficiency of the heat exchanger, the work capacity of the turbine can be effectively improved. Therefore, how to optimize the structure of the heat exchanger and improve the heat exchange efficiency has become a problem to be solved in the field.
[0024] Reference is made below Figures 1-2 The structure of the shell-and-tube counterflow heat exchanger suitable for the compressed air energy storage system according to the embodiments of the present application is described.
[0025] The structure of the shell-and-tube counterflow heat exchanger 1 suitable for the compressed air energy storage system according to the present application comprises a housing 11 and a compressed medium pipeline 12. The housing 11 is formed with a heat exchange cavity 111 suitable for containing heat exchange medium. The inlet 112 and the outlet 113 are arranged at intervals in the extension direction of the heat exchange cavity 111. The compressed medium pipeline 12 is accommodated in the heat exchange cavity 111. The compressed medium pipeline 12 is formed with a channel for circulating compressed medium. The compressed medium pipeline 12 extends spirally from one end of the housing 11 to the other end.
[0026] Specifically, a heat exchange cavity 111 adapted to accommodate a heat exchange medium is formed in the shell 11, an inlet 112 and an outlet 113 are arranged at intervals in the extension direction of the heat exchange cavity 111, the heat exchange medium enters the heat exchange cavity 111 from the inlet 112, flows in the extension direction of the heat exchange cavity 111 and flows out of the heat exchange cavity 111 from the outlet 113, a compressed medium pipeline 12 is arranged inside the heat exchange cavity 111, the compressed medium flows in the compressed medium pipeline 12, the heat exchange medium itself stores heat, when the compressed medium flows in the compressed medium pipeline 12, the compressed medium in the compressed medium pipeline 12 exchanges heat with the heat exchange medium, thereby absorbing the heat in the heat exchange medium. Wherein, the compressed medium pipeline 12 extends spirally from one end of the shell 11 to the other end, the spiral pipeline design can increase the heat exchange area between the compressed medium and the heat exchange medium, at the same time, compared with the existing straight pipe structure, the bolt type pipeline can reduce the fluid resistance, further improve the heat exchange efficiency.
[0027] In the present scheme, the heat exchange medium is configured as heat conducting oil, and the compressed medium is configured as air.
[0028] According to the structure of the shell and tube counterflow heat exchanger 1 suitable for the compressed air energy storage system of the utility model, the compressed medium pipeline 12 is configured to extend spirally from one end of the shell 11 to the other end, compared with the straight pipe structure of the prior art, the contact area of the compressed medium pipeline 12 and the heat exchange medium is increased, and the flow resistance of the compressed medium is reduced, and the heat exchange efficiency of the heat exchanger 1 is improved.
[0029] According to some embodiments of the utility model, the compressed medium pipeline 12 is configured as a plurality of, at least two compressed medium pipelines 12 are configured as a double spiral structure around the rotation axis, and the rotation axis is parallel to the axis of the shell 11, or at least two compressed medium pipelines 12 are configured as a double spiral structure around the axis of the shell 11.
[0030] Specifically, by configuring the compressed medium pipeline 12 as a plurality of, the flow capacity of the compressed medium is improved, the compressed medium flowing in the compressed medium pipeline 12 exchanges heat with the heat exchange medium, by configuring the compressed medium pipeline 12 as a plurality of, the contact area of the compressed medium and the heat exchange medium is increased, and the heat exchange efficiency is improved, wherein at least two compressed medium pipelines 12 are configured as a double spiral structure, for example, Figure 1 and Figure 2As shown, the plurality of compressed medium pipelines 12 comprises a plurality of double helix structures, at least two compressed medium pipelines 12 are configured as double helix structures extending around the rotation axis, the rotation axis is parallel to the axis of the shell 11, and at least two compressed medium pipelines 12 can also be configured as double helix structures extending around the axis of the shell 11. Since the single helix compressed medium pipeline 12 will leave a large space in the compression cavity, by configuring the plurality of compressed medium pipelines 12 as a plurality of double helix structures, the space in the heat exchange cavity 111 is fully utilized, not only the heat exchange area of the heat exchange medium and the compressed medium pipeline 12 is increased, but also the arrangement of the plurality of compressed medium pipelines 12 is more compact, the heat exchange efficiency of the heat exchange medium and the compressed medium in the heat exchange cavity 111 is higher, and the heat exchange is more uniform.
[0031] According to some embodiments of the present application, the ends of the shell 11 are respectively formed with a plurality of first through holes 131 and second through holes 132 suitable for the compressed medium pipelines 12 to pass through; wherein, at least two first through holes 131 are arranged adjacent to each other to allow two compressed medium pipelines 12 in double helix structure to enter the heat exchange cavity 111; and / or at least two second through holes 132 are arranged adjacent to each other to allow two compressed medium pipelines 12 in double helix structure to lead out of the heat exchange cavity 111.
[0032] Specifically, at least two first through holes 131 are arranged adjacent to each other to allow two compressed medium pipelines 12 in double helix structure to enter the heat exchange cavity 111 at the same time, and at least two second through holes 132 are also arranged adjacent to each other to allow two compressed medium pipelines 12 in double helix structure to lead out of the heat exchange cavity 111 at the same time. The design of the first through hole 131 and the second through hole 132 can make the compressed medium pipeline 12 in double helix structure smoothly lead into and lead out of the heat exchange cavity 111. A plurality of first through holes 131 and second through holes 132 are formed at the ends of the shell 11 to facilitate the leading in and leading out of the heat exchange cavity 111 of the plurality of compressed medium pipelines 12 in a plurality of double helix structures, so that the layout of the plurality of compressed medium pipelines 12 is more compact, which is beneficial to reduce the volume of the shell 11.
[0033] According to some embodiments of the present application, the plurality of compressed medium pipelines 12 is arranged symmetrically around the axis center of the shell 11.
[0034] Specifically, by configuring the plurality of compressed medium pipelines 12 to be symmetrically arranged around the axis center of the shell 11, the heat exchange medium circulating in the heat exchange cavity 111 and the outer periphery of the compressed medium pipeline 12 are more uniformly contacted, and the heat exchange between the compressed medium and the heat exchange medium is also more uniform, which is beneficial to improve the heat exchange efficiency of the heat exchange medium and the compressed medium, and the structure of the plurality of compressed medium pipelines 12 arranged symmetrically is more stable.
[0035] According to some embodiments of the present application, the compressed medium in the compressed medium pipeline 12 flows in a first direction, and the heat exchange medium in the heat exchange cavity 111 flows in a second direction, and the first direction is opposite to the second direction.
[0036] Specifically, the compressed medium flows in the first direction, and the heat exchange medium flows in the second direction, and the first direction is opposite to the second direction, for example, the compressed medium flows from left to right in the heat exchange cavity 111, and the heat exchange medium flows from right to left in the heat exchange cavity 111, by configuring the flow of the compressed medium and the heat exchange medium as a counter-flow design, so that the compressed medium and the heat exchange medium flow in opposite directions, which ensures efficient heat transfer between the compressed medium and the heat exchange medium, and improves the efficiency of the compressed medium absorbing heat.
[0037] According to some embodiments of the present application, the heat exchanger 1 further comprises a plurality of baffles 14, which are arranged in the heat exchange cavity 111 and are configured to be spaced apart between the inlet 112 and the outlet 113 and to be staggered in the radial direction.
[0038] Specifically, by arranging a plurality of baffles 14 in the heat exchange cavity 111, the plurality of baffles 14 are spaced apart between the inlet 112 and the outlet 113 and are staggered in the radial direction of the shell 11, so that the flow path of the heat exchange medium in the heat exchange cavity 111 is lengthened, thereby increasing the contact time and contact area between the heat exchange medium and the compressed medium pipeline 12, and improving the heat exchange efficiency, wherein the heat exchange medium is blocked by the baffles 14 during the flow process, so that the heat exchange medium generates counter-flow and differential flow during the flow process, and the contact time and contact area between the heat exchange medium and the compressed medium pipeline 12 are larger, which is more conducive to heat exchange and improves the heat exchange efficiency.
[0039] According to some embodiments of the present application, the plurality of baffles 14 are arranged parallel to each other and perpendicular to the axis of the shell 11, and one of the two adjacent baffles 14 is spaced apart from one side of the inner wall of the heat exchange cavity 111, and the other baffle 14 is spaced apart from the other side of the inner wall of the heat exchange cavity 111.
[0040] Specifically, the plurality of baffles 14 are arranged perpendicular to the axis of the shell 11, respectively, which enhances the blocking effect of the baffles 14 on the heat exchange medium, and the heat exchange medium needs to bypass the baffles 14 during the flow process, thereby increasing the length of the flow path of the heat exchange medium, which helps to increase the contact time and contact area between the heat exchange medium and the compressed medium pipeline 12, and improves the heat exchange efficiency, and the two adjacent baffles 14 are spaced apart from different sides of the inner wall of the heat exchange cavity 111, respectively, so that the heat exchange medium can form a more uniform distribution in the heat exchange cavity 111 during the flow process, and the heat exchange medium and the compressed medium pipeline 12 are more fully contacted, thereby improving the heat exchange efficiency.
[0041] According to some embodiments of the present application, the baffle plate 14 is connected with the compressed medium pipeline 12 to support the compressed medium pipeline 12.
[0042] Specifically, the plurality of baffle plates 14 are connected with the compressed medium pipeline 12 respectively, which provides stable support for the compressed medium pipeline 12, reduces the deformation or displacement of the pipeline under high pressure or vibration conditions, enhances the stability of the pipeline, and ensures that the contact between the compressed medium pipeline 12 and the heat exchange medium is more stable, which is conducive to the transfer and exchange of heat.
[0043] According to some embodiments of the present application, the inlet 112 and the outlet 113 extend along the radial direction of the shell 11 respectively or extend along the axial direction of the shell 11 respectively.
[0044] Specifically, the inlet 112 and the outlet 113 can be configured to extend along the radial direction of the shell 11, as shown in FIG. 1, the extension direction of the inlet 112 and the outlet 113 is perpendicular to the extension direction of the shell 11, the heat exchange medium is introduced into the heat exchange cavity 111 through the inlet 112, and the heat exchange medium is discharged from the heat exchange cavity 111 through the outlet 113, which helps to increase the contact area between the heat exchange medium and the compressed medium pipeline 12 and improve the heat exchange efficiency. Figure 1
[0045] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.
[0046] In the description of the present application, "first feature" and "second feature" can include one or more features.
[0047] In the description of the present application, "a plurality of" means two or more.
[0048] In the description of the present application, "above" or "below" of the first feature to the second feature can include that the first and second features are in direct contact, or can include that the first and second features are not in direct contact but are in contact through another feature between them.
[0049] In the description of the utility model, first feature is in second feature " on " " above " and " upper side " include first feature is in second feature directly above and oblique, or just indicate first feature horizontal height is higher than second feature.
[0050] In the description of the utility model, the description of reference term " an embodiment " " some embodiments " " illustrative embodiment " " example " " specific example " or " some examples " etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are contained in at least one embodiment or example of the utility model. In the description, the illustrative description of the above-mentioned terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.
[0051] Although the embodiments of the utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and purposes of the utility model, and the scope of the utility model is defined by the claims and their equivalents.
Claims
1. A shell-and-tube counterflow heat exchanger structure suitable for use in a compressed air energy storage system, characterized in that, Comprising: a shell (11) having a heat exchange cavity (111) formed therein for accommodating a heat exchange medium, an inlet (112) and an outlet (113) being spaced apart along an extension direction of the heat exchange cavity (111); a plurality of compressed medium pipes (12) accommodated in the heat exchange cavity (111), each of the compressed medium pipes (12) having a channel formed therein for flowing a compressed medium, the compressed medium pipes (12) being helically extended from one end to another end of the shell (11); at least two of the compressed medium pipes (12) being configured as a double helix structure around a rotation axis parallel to an axis of the shell (11), or at least two of the compressed medium pipes (12) being configured as a double helix structure around the axis of the shell (11).
2. The shell and tube counter flow heat exchanger structure suitable for compressed air energy storage system as claimed in claim 1 wherein, a plurality of first through holes (131) and a plurality of second through holes (132) are respectively formed at two ends of the shell (11) for the compressed medium pipes (12) to pass through; wherein at least two of the first through holes (131) are adjacently arranged for the two compressed medium pipes (12) in the double helix structure to enter the heat exchange cavity (111); and / or at least two of the second through holes (132) are adjacently arranged for the two compressed medium pipes (12) in the double helix structure to lead out of the heat exchange cavity (111).
3. The shell and tube counter flow heat exchanger structure suitable for compressed air energy storage system as claimed in claim 1 wherein, The plurality of compressed medium pipes (12) are centrally symmetrically arranged around the axis of the shell (11).
4. The shell and tube counter flow heat exchanger structure suitable for compressed air energy storage system as claimed in claim 1 wherein, The compressed medium in the compressed medium pipes (12) flows in a first direction, and the heat exchange medium in the heat exchange cavity (111) flows in a second direction, the first direction being opposite to the second direction.
5. The shell and tube counter flow heat exchanger structure suitable for compressed air energy storage system as claimed in claim 1 wherein, Further comprising: a plurality of baffles (14) arranged in the heat exchange cavity (111) and configured to be spaced apart and radially staggered between the inlet (112) and the outlet (113).
6. The shell and tube counter flow heat exchanger structure suitable for compressed air energy storage system as claimed in claim 5 wherein, The plurality of baffles (14) are arranged parallel to each other and perpendicular to the axis of the shell (11), and between any two adjacent baffles (14), one of the baffles (14) is spaced apart from one side of an inner wall of the heat exchange cavity (111), and the other of the baffles (14) is spaced apart from the other side of the inner wall of the heat exchange cavity (111).
7. The shell and tube counterflow heat exchanger structure suitable for compressed air energy storage system according to claim 6, characterized in that, The baffles (14) are connected to the compressed medium pipes (12) to support the compressed medium pipes (12).
8. The shell and tube counter flow heat exchanger structure suitable for compressed air energy storage system as claimed in claim 1 wherein, The inlet (112) and the outlet (113) respectively extend along a radial direction of the shell (11) or respectively extend along an axial direction of the shell (11).