Three-fluid shell-and-tube heat exchanger structure suitable for compressed air energy storage system

Abstract

The utility model discloses a three-fluid shell-and-tube heat exchanger structure suitable for a compressed air energy storage system, and the heat exchanger comprises a tube pass pipeline which is suitable for the circulation of a compression medium and is suitable for being communicated with the compression energy storage system; the first shell is arranged on the periphery of the tube pass pipeline, and a first cavity used for containing a first heat exchange medium is formed between the first shell and the tube pass pipeline; the second shell is arranged on at least part of the periphery of the first shell, and a second cavity suitable for containing a second heat exchange medium is formed between the second shell and the first shell. The heat exchanger can improve heat exchange efficiency, reduce heat loss and improve heat energy utilization rate.

Description

Technical Field

[0001] The utility model relates to the technical field of heat exchangers, in particular to a three-fluid shell-and-tube heat exchanger structure applicable to a compressed air energy storage system. Background Art

[0002] In the related art, as one of the important subsystems in a compressed air energy storage system, a heat exchanger needs to fully absorb the compression heat generated by a compressor during the operation of the compressor and store the heat in a heat storage medium. When a turbine operates, 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 transfer 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 transfer efficiency has become an urgent problem to be solved in this field. Content of the Utility Model

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. For this reason, an object of the utility model is to provide a three-fluid shell-and-tube heat exchanger structure applicable to a compressed air energy storage system. The heat exchanger of the utility model can improve the heat transfer efficiency, reduce heat loss, and improve the utilization rate of thermal energy.

[0004] The three-fluid shell-and-tube heat exchanger structure applicable to a compressed air energy storage system according to the utility model includes: a tube-side pipeline, in which a compressed medium is suitable for flowing, and the tube-side pipeline is suitable for being connected to the compressed energy storage system; a first shell, which is arranged on the outer periphery of the tube-side pipeline and forms a first chamber for accommodating a first heat exchange medium between the first shell and the tube-side pipeline; a second shell, which is arranged on at least part of the outer periphery of the first shell, and a second chamber for accommodating a second heat exchange medium is formed between the second shell and the first shell.

[0005] In the three-fluid shell-and-tube heat exchanger structure applicable to a compressed air energy storage system according to the utility model, a tube-side pipeline is arranged inside the first shell, a compressed medium flows in the tube-side pipeline, and a first heat exchange medium flows on the outer periphery of the tube-side pipeline. Heat exchange is carried out between the first heat exchange medium and the compressed medium to heat the compressed medium. By heating the compressed medium, it is beneficial to improve the work capacity of the compressed energy storage system. Moreover, a second shell is arranged on the outer periphery of the first shell, a second chamber is defined between the second shell and the first shell, and a second heat exchange medium is accommodated in the second chamber. The second heat exchange medium and the first heat exchange medium can be effectively isolated through the first shell, and the second heat exchange medium can absorb the heat stored by the first heat exchange medium to reduce heat loss and improve the utilization rate of thermal energy of the heat exchanger.

[0006] According to some embodiments of the present utility model, the heat transfer coefficient of the tube-side pipeline is greater than that of the first shell.

[0007] According to some embodiments of the present utility model, the heat transfer coefficient of the second shell is respectively less than those of the tube-side pipeline and the first shell.

[0008] According to some embodiments of the present utility model, the heat exchanger further includes: a heat insulation layer, which is arranged on the outer periphery of the second shell.

[0009] According to some embodiments of the present utility model, the first shell is provided with an inlet pipe and an outlet pipe, and the inlet pipe and the outlet pipe are respectively adapted to communicate the first chamber with a medium source; wherein, a first port and a second port are formed on the second shell, the inlet pipe passes through the first port, and the outlet pipe passes through the second port.

[0010] According to some embodiments of the present utility model, the heat exchanger further includes: a sealing part, which is respectively arranged at the first port and the second port, and the sealing part seals the gap between the inlet pipe and the first port and the gap between the outlet pipe and the second port.

[0011] According to some embodiments of the present utility model, the heat exchanger further includes: a pressure detection device, which is arranged at the first port or the second port.

[0012] According to some embodiments of the present utility model, the heat exchanger further includes: a temperature detection device, which is arranged at the first port or the second port.

[0013] According to some embodiments of the present utility model, the second shell is configured as a cylinder, a compressed medium inlet and a compressed medium outlet that communicate with the tube-side pipeline are respectively formed at two ends of the second shell, and an inlet pipe and an outlet pipe that are spaced apart in the circumferential direction of the second shell are arranged on the first shell, and the inlet pipe and the outlet pipe respectively pass through the second shell.

[0014] The additional aspects and advantages of the present utility model will be partially given in the following description, partially will become obvious from the following description, or will be understood through the practice of the present utility model. Description of the Drawings

[0015] The above and / or additional aspects and advantages of the present utility model will become obvious and easy to understand from the description of the embodiments in conjunction with the following drawings, wherein:

[0016] Figure 1 is a schematic structural diagram of a heat exchanger according to an embodiment of the present utility model;

[0017] Figure 2 Schematic diagram of the separated part of the first housing and the second housing according to an embodiment of the present utility model.

[0018] Reference numerals:

[0019] Heat exchanger 1;

[0020] Tube-side pipeline 11, compressed medium inlet 111, compressed medium outlet 112;

[0021] First housing 12, first chamber 121, inlet pipe 122, outlet pipe 123; second housing 13, second chamber 131;

[0022] Sealing part 14; pressure detection device 15, temperature detection device 16, humidity detection device 17. Detailed implementation manners

[0023] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the accompanying drawings, in which the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions from beginning to end. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present utility model and should not be construed as a limitation to the present utility model.

[0024] In the related art, as one of the important subsystems in the compressed air energy storage system, the heat exchanger needs to fully absorb the compression heat generated by the compressor during the operation of the compressor and store the heat in the heat storage medium. When the turbine operates, 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 transfer 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 transfer efficiency has become an urgent problem to be solved in this field.

[0025] Next, refer to Figure 1 - Figure 2 Describe the structure of the three-fluid shell-and-tube heat exchanger 1 applicable to the compressed air energy storage system according to an embodiment of the present utility model.

[0026] The structure of the three-fluid shell-and-tube heat exchanger 1 applicable to the compressed air energy storage system according to the present utility model includes a tube-side pipeline 11, a first housing 12 and a second housing 13. The tube-side pipeline 11 is adapted to circulate a compressed medium, and the tube-side pipeline 11 is adapted to communicate with the compressed energy storage system; the first housing 12 is disposed on the outer periphery of the tube-side pipeline 11 and a first chamber 121 for accommodating a first heat exchange medium is formed between the first housing 12 and the tube-side pipeline 11; the second housing 13 is disposed on at least a part of the outer periphery of the first housing 12, and a second chamber 131 for accommodating a second heat exchange medium is formed between the second housing 13 and the first housing 12.

[0027] Specifically, the tube-side pipeline 11 is used for circulating the compressed medium. In this solution, the compressed medium is configured as air. The tube-side pipeline 11 is directly connected to the compressed energy storage system to ensure the smooth circulation of the compressed medium. The first housing 12 is disposed on the outer periphery of the tube-side pipeline 11, and a first chamber 121 is formed between the first housing 12 and the tube-side pipeline 11. The first chamber 121 is used to accommodate the first heat exchange medium. The second heat exchange medium is configured as heat-conducting oil. The first heat exchange medium exchanges heat with the compressed medium in the tube-side pipeline 11 to achieve heat transfer. The tube-side pipeline 11 can be configured as multiple ones to increase the circulation volume of the compressed medium. By circulating the compressed medium in the multiple tube-side pipelines 11 and exchanging heat with the first heat exchange medium, the heat exchange efficiency can be improved. The second housing 13 is disposed on at least part of the outer periphery of the first housing 12, and a second chamber 131 is formed between the second housing 13 and the first housing 12. The second chamber 131 is used to accommodate the second heat exchange medium. The second heat exchange medium is configured as water. The second heat exchange medium exchanges heat with the first housing 12 and the first heat exchange medium therein to further achieve heat transfer or control. After the second heat exchange medium (water) absorbs the heat of the first heat exchange medium (heat-conducting oil), it can be used for behaviors such as power station heating, long-distance heating, and equipment preheating to reduce heat loss and improve the thermal energy utilization rate of the heat exchanger 1.

[0028] A double-layer heat exchange structure is formed between the first housing 12 and the second housing 13. The heat stored in the first heat exchange medium inside the first housing 12 can be transferred not only to the compressed medium but also to the second heat exchange medium, making the heat exchange efficiency of the heat exchanger 1 higher. Since the heat stored in the first heat exchange medium is not only absorbed by the first heat exchange medium but also by the second heat exchange medium, heat loss is reduced, the heat exchange efficiency of the heat exchanger 1 is improved, and the thermal energy utilization rate is ensured. At the same time, the first heat exchange medium and the second heat exchange medium are respectively accommodated in the first chamber 121 and the second chamber 131, achieving the isolation of the media and avoiding direct contact and possible contamination between different media.

[0029] In the structure of the three-fluid shell-and-tube heat exchanger 1 applicable to the compressed air energy storage system according to the present invention, the tube-side pipeline 11 is arranged inside the first housing 12, and a compressed medium circulates in the tube-side pipeline 11. A first heat exchange medium circulates on the outer periphery of the tube-side pipeline 11. Heat exchange is carried out between the first heat exchange medium and the compressed medium to heat the compressed medium. By heating the compressed medium, it is beneficial to improve the work capacity of the compressed energy storage system. Moreover, a second housing 13 is arranged on the outer periphery of the first housing 12. A second chamber 131 is defined between the second housing 13 and the first housing 12. A second heat exchange medium is accommodated in the second chamber 131. The second heat exchange medium and the first heat exchange medium can be effectively isolated by the first housing 12, and the second heat exchange medium can absorb the heat stored in the first heat exchange medium to reduce heat loss and improve the thermal energy utilization rate of the heat exchanger 1.

[0030] According to some embodiments of the present utility model, the heat conduction coefficient of the tube-side pipeline 11 is greater than that of the first shell 12.

[0031] Specifically, since the tube-side pipeline 11 is in direct contact with and circulates the compressed medium, it needs to transfer heat more efficiently. Therefore, by configuring the heat conduction coefficient of the tube-side pipeline 11 to be greater than that of the first shell 12, the compressed medium in the tube-side pipeline 11 can absorb heat from the first heat exchange medium more quickly, thereby improving the heat exchange efficiency of the entire heat exchanger 1.

[0032] According to some embodiments of the present utility model, the heat conduction coefficient of the second shell 13 is respectively less than those of the tube-side pipeline 11 and the first shell 12.

[0033] Specifically, the second shell 13 is disposed on the outer periphery of the first shell. Since its heat conduction coefficient is respectively less than those of the tube-side pipeline 11 and the first shell 12, and the heat conduction coefficient of the first shell 12 is less than that of the tube-side pipeline 11, most of the heat stored in the first heat exchange medium can be transferred to the compressed medium in the tube-side pipeline 11 to ensure the heat exchange efficiency of the heat exchanger 1, and part of the heat of the first heat exchange medium can be transferred into the second shell 13 to heat the second heat exchange medium, thereby reducing heat loss and improving the thermal energy utilization rate of the heat exchanger 1.

[0034] According to some embodiments of the present utility model, the heat exchanger 1 further includes a heat insulation layer, and the heat insulation layer is disposed on the outer periphery of the second shell 13.

[0035] Specifically, as an additional heat insulation layer, the heat insulation layer can further reduce the loss of heat from the second shell 13 to the external environment. This helps to maintain the temperature stability inside the heat exchanger 1, reduce heat loss, and improve the thermal energy utilization rate. The heat insulation layer helps to save energy and ensure that the heat is mainly used for the internal heat exchange process, thereby improving the energy efficiency of the entire system.

[0036] According to some embodiments of the present utility model, the first shell 12 is provided with an inlet pipe 122 and an outlet pipe 123, and the inlet pipe 122 and the outlet pipe 123 are respectively adapted to communicate the first chamber 121 with a medium source; wherein, a first port and a second port are formed on the second shell 13, and the inlet pipe 122 passes through the first port, and the outlet pipe 123 passes through the second port.

[0037] Specifically, the inlet pipe 122 is responsible for introducing the first heat exchange medium from the medium source into the first chamber 121, which ensures that the heat exchanger 1 can continuously perform heat exchange without interruption due to insufficient medium. The outlet pipe 123 then exports the first heat exchange medium that has undergone heat exchange from the first chamber 121 and returns it to the medium source or for other processing, which ensures that the heat exchange medium in the first chamber 121 always remains in a flowing state, improving the heat exchange efficiency. Among them, a first port and a second port are specifically formed on the second housing 13, and the first port and the second port are respectively used for the inlet pipe 122 and the outlet pipe 123 to pass through, enabling the inlet pipe 122 and the outlet pipe 123 to be conveniently connected to the second housing 13 and facilitating the separation of the first heat exchange medium and the second heat exchange medium.

[0038] According to some embodiments of the present invention, the heat exchanger 1 further includes: a sealing portion 14, and the sealing portion 14 is respectively disposed at the first port and the second port. The sealing portion 14 seals the gap between the inlet pipe 122 and the first port, and seals the gap between the outlet pipe 123 and the second port.

[0039] Specifically, by respectively providing the sealing portion 14 at the first port and the second port, it is ensured that the connection between the inlet pipe 122 and the outlet pipe 123 and the first port and the second port on the second housing 13 has good sealing performance, preventing the leakage of the medium in the first chamber 121 or the second chamber 131. The sealing portion 14 can effectively seal the gaps between the inlet pipe 122 and the first port, and between the outlet pipe 123 and the second port, ensuring that the second heat exchange medium does not leak out from these gaps, which is crucial for maintaining the normal operation of the heat exchanger 1 and ensuring the safety of the system. Through the fixing effect of the sealing portion 14, the connection between the inlet pipe 122 and the outlet pipe 123 and the second housing 13 is more stable, reducing the risk of loosening or leakage caused by vibration or pressure changes. Among them, the sealing portion 14 is configured as a high-temperature resistant structure to ensure that it can still maintain its sealing performance and structural stability at high temperatures and will not deform, melt or lose its sealing effect due to high temperatures.

[0040] According to some embodiments of the present invention, the heat exchanger 1 further includes: a pressure detection device 15, and the pressure detection device 15 is disposed at the first port or the second port.

[0041] Specifically, the pressure detection device 15 can monitor the pressure changes at the first port or the second port in real time, thereby understanding the pressure conditions inside or outside the heat exchanger 1. This is crucial for timely detecting potential safety hazards and troubleshooting. Through the pressure detection device 15, real-time monitoring of the pressure inside or outside the heat exchanger 1 can be achieved, avoiding damage to the sealing portion 14 due to excessive pressure at the first port or the second port, thereby causing leakage of the second heat exchange medium in the second chamber 131. When the pressure exceeds or is lower than the set safety range, the sealing portion 14 can be repaired in time to avoid leakage of the second heat exchange medium.

[0042] According to some embodiments of the present utility model, the heat exchanger 1 further includes: a temperature detection device 16, which is disposed at the first port or the second port.

[0043] Specifically, the temperature detection device 16 can monitor the temperature change at the first port or the second port in real time, so as to understand the temperature condition inside or outside the heat exchanger 1. By disposing the temperature detection device 16 at the first port or the second port, the temperature in the second chamber 131 is monitored in real time, preventing the sealing portion 14 from being damaged due to excessive temperature in the second chamber 131, and avoiding the leakage of the second heat exchange medium due to the damage of the second housing 13. When an abnormal temperature is detected, the sealing portion 14 can be repaired in time.

[0044] In some embodiments, the heat exchanger 1 further includes a humidity detection device 17, which is disposed at the first port or the second port. By disposing the humidity detection device 17, the humidity change in the second chamber 131 is detected, preventing the second heat exchange medium in the second housing 13 from permeating.

[0045] According to some embodiments of the present utility model, the second housing 13 is configured as a cylinder, and a compressed medium inlet 111 and a compressed medium outlet 112 communicating with the tube-side pipeline 11 are respectively formed at both ends of the second housing 13. An introduction pipe 122 and a discharge pipe 123 spaced circumferentially of the second housing 13 are provided on the first housing 12, and the introduction pipe 122 and the discharge pipe 123 respectively penetrate through the second housing 13.

[0046] Specifically, the second housing 13 is configured as a cylinder, and this design enables the second housing 13 to have a larger internal space and a more uniform wall thickness, thereby enhancing its structural strength and heat exchange efficiency. The compressed medium inlet 111 and the compressed medium outlet 112 communicating with the tube-side pipeline 11 are respectively formed at both ends of the second housing 13. The design of the compressed medium inlet 111 and the compressed medium outlet 112 enables the compressed medium to smoothly enter and leave the internal space of the second housing 13 and exchange heat with the second heat exchange medium therein. The introduction pipe 122 and the discharge pipe 123 spaced circumferentially of the second housing 13 are provided on the first housing 12, such that the flow direction of the first heat exchange medium in the first chamber 121 is perpendicular to the flow direction of the compressed medium, improving the heat exchange efficiency. The heat exchanger 1 of the present utility model can effectively transfer the heat of the first heat exchange medium to the compressed medium, thereby realizing the effective transfer and utilization of energy. The circumferential spacing layout of the introduction pipe 122 and the discharge pipe 123 and the design of penetrating through the second housing 13 make the structure of the heat exchanger 1 more compact, while improving the heat exchange efficiency. The cylinder configuration of the second housing 13 enhances its structural strength, enabling the heat exchanger 1 to withstand higher working pressures and temperatures, improving the safety and reliability of the system.

[0047] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation to the present invention.

[0048] In the description of the present invention, "first feature" and "second feature" may include one or more such features.

[0049] In the description of the present invention, “plurality” means two or more.

[0050] In the description of the present invention, a first feature being “above” or “below” a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact via another feature therebetween.

[0051] In the description of the present invention, a first feature “above”, “above” and “above” a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature.

[0052] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the illustrative use of the above terms does not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0053] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and purpose of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A three-fluid shell-and-tube heat exchanger structure applicable to a compressed air energy storage system, characterized in that, Comprising: A tube-side pipeline (11) which is adapted to allow a compressed medium to flow therethrough and is adapted to communicate with the compressed energy storage system; A first housing (12) which is disposed on the outer periphery of the tube-side pipeline (11) and forms a first chamber (121) for accommodating a first heat exchange medium between the first housing (12) and the tube-side pipeline (11); A second housing (13) which is disposed on at least a part of the outer periphery of the first housing (12) and forms a second chamber (131) for accommodating a second heat exchange medium between the second housing (13) and the first housing (12).

2. The three-fluid shell-and-tube heat exchanger structure applicable to a compressed air energy storage system according to claim 1, characterized in that The thermal conductivity of the tube-side pipeline (11) is greater than that of the first housing (12).

3. The three-fluid shell-and-tube heat exchanger structure applicable to a compressed air energy storage system according to claim 2, wherein The thermal conductivity of the second housing (13) is less than that of the tube-side pipeline (11) and the first housing (12) respectively.

4. The three-fluid shell-and-tube heat exchanger structure applicable to a compressed air energy storage system according to claim 3, wherein Further comprising: A thermal insulation layer which is disposed on the outer periphery of the second housing (13).

5. The three-fluid shell-and-tube heat exchanger structure applicable to a compressed air energy storage system according to claim 1, characterized in that, The first housing (12) is provided with an inlet pipe (122) and an outlet pipe (123), and the inlet pipe (122) and the outlet pipe (123) are respectively adapted to communicate the first chamber (121) with a medium source; wherein A first port and a second port are formed on the second housing (13), the inlet pipe (122) passes through the first port, and the outlet pipe (123) passes through the second port.

6. The three-fluid shell-and-tube heat exchanger structure applicable to a compressed air energy storage system according to claim 5, wherein, Further comprising: A sealing portion (14) which is respectively disposed at the first port and the second port, and the sealing portion (14) seals the gap between the inlet pipe (122) and the first port and the gap between the outlet pipe (123) and the second port.

7. The three-fluid shell-and-tube heat exchanger structure applicable to a compressed air energy storage system according to claim 5, characterized in that, Further comprising: A pressure detection device (15) which is disposed at the first port or the second port.

8. The three-fluid shell-and-tube heat exchanger structure applicable to a compressed air energy storage system according to claim 5, characterized in that, Further comprising: A temperature detection device (16) which is disposed at the first port or the second port.

9. The three-fluid shell-and-tube heat exchanger structure applicable to a compressed air energy storage system according to any one of claims 1-8, characterized in that, The second housing (13) is configured as a cylinder, and a compressed medium inlet (111) and a compressed medium outlet (112) which communicate with the tube-side pipeline (11) are respectively formed at two ends of the second housing (13), and the inlet pipe (122) and the outlet pipe (123) which are spaced in the circumferential direction of the second housing (13) are disposed on the first housing (12), and the inlet pipe (122) and the outlet pipe (123) respectively penetrate through the second housing (13).

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