Thermoelectric power generation corrugated heat regenerator and gas turbine

Abstract

The invention relates to the technical field of power generation, in particular to a temperature difference power generation corrugated heat regenerator and a gas turbine. The temperature difference power generation corrugated heat regenerator comprises a corrugated channel structure unit, a temperature difference power generation device and a shell package, and the corrugated channel structure unit comprises an upper corrugated plate and a lower corrugated plate; the upper corrugated plates and the lower corrugated plates are vertically arranged in a staggered mode to form hot flow channels and cold flow channels which are alternately arranged, and the thermoelectric power generation device is embedded into the junction area of the upper corrugated plates and the lower corrugated plates and penetrates through the wall faces of the cold flow channels on the left side and the right side. The plurality of corrugated channel structure units are packaged into a modular body by the shell package; the thermoelectric power generation corrugated heat regenerator is installed in a tail gas path of the gas turbine, a cold flow channel of the thermoelectric power generation corrugated heat regenerator is connected with a compressor outlet of the gas turbine, and a hot flow channel of the thermoelectric power generation corrugated heat regenerator is connected with a turbine exhaust port of the gas turbine. The system is compact in structure, high in integration level and suitable for energy recovery systems under various high-temperature and cold-heat intersection working conditions.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of power generation, in particular to a temperature difference power generation corrugated recuperator and a gas turbine. BACKGROUND

[0002] Although there are researches and practices of applying temperature difference power generation modules to tail gas heat energy recovery of energy systems in the related art, in the gas turbine system, most of the schemes have not been deeply integrated with the recuperator due to the compact structure layout, high exhaust gas temperature and high gas flow speed of the operating environment. The common thermoelectric conversion structures are mostly externally mounted or additional arranged, which cannot fully utilize the existing cold and hot flow channels inside the heat exchanger, increasing the system volume and complexity, and also making it difficult to arrange a sufficient number of thermoelectric conversion modules in the limited space to form an effective temperature difference. In addition, the interface arrangement of the hot end and the cold end in some schemes is simple and does not form a good match with the flow channel structure, resulting in high thermal resistance, low temperature difference utilization rate and limited thermoelectric conversion efficiency. Moreover, under the conditions of high temperature and high speed flow, the module packaging reliability and heat exchange stability also limit its application expansion in the gas turbine. SUMMARY

[0003] The present application aims to provide a temperature difference power generation corrugated recuperator and a gas turbine with compact structure and high integration degree, which are suitable for gas turbine systems.

[0004] In order to achieve the above-mentioned purpose, the present application provides the following technical solutions: In a first aspect, the present application provides a temperature difference power generation corrugated recuperator, comprising: A corrugated channel structure unit, comprising an upper corrugated plate and a lower corrugated plate, the upper corrugated plate and the lower corrugated plate are arranged in a staggered manner, forming alternating hot flow channels and cold flow channels; A thermoelectric power generation device, which is embedded in the junction area of the upper corrugated plate and the lower corrugated plate and penetrates between the left and right cold flow channel walls; An outer shell package, which packages a plurality of corrugated channel structure units into a modular body.

[0005] Optionally, the thermoelectric power generation device comprises a plurality of thermoelectric conversion modules, the thermoelectric conversion modules are embedded in the abutting parts of each hot flow channel and cold flow channel in the form of a sheet-shaped module array, the upper and lower surfaces of the thermoelectric conversion modules are hot ends and are in contact with the hot flow channels, and the left and right sides of the thermoelectric conversion modules are cold ends and are in heat exchange with the walls of the cold flow channels.

[0006] Optionally, the cold end of the thermoelectric conversion module is provided with a high-thermal-conductivity and thermal-insulation composite gasket.

[0007] Optionally, the corrugated channel geometry of the corrugated channel structure unit is adjustable, and the corrugated channel geometry includes a wave height, a wave distance, and a wave shape parameter for controlling a wave shape.

[0008] Optionally, the wave shape of the upper corrugated plate and the lower corrugated plate is an adjustable asymmetric periodic curve designed based on a variable parameter function, and the variable parameter function is in the form of:

[0009] wherein, is a height of the corrugated curve at a position x, is a total height between a wave crest and a wave trough, P is a corrugated period length, and i is a wave shape number, is a position coordinate in a direction of a channel length, and N is a wave shape parameter for controlling a steepness and an asymmetric degree of the wave shape.

[0010] Optionally, a module notch is reserved at a wave crest of the upper corrugated plate and the lower corrugated plate, the thermoelectric conversion module is embedded in the module notch, the module notch is integrally manufactured by a laser cutting or a mold forming process, and a boundary of the thermoelectric conversion module and a plate surface of the upper corrugated plate and the lower corrugated plate are air-tightly closed and heat conduction is strengthened by using a high-thermal-conductivity insulating glue or a brazing method.

[0011] Optionally, a packaging structure of the thermoelectric conversion module adopts brazing and ceramic insulation protection, an insulation thickness of the ceramic insulation protection is 0.5-1 mm, a hot end contact surface of the thermoelectric conversion module is configured with a high-thermal-conductivity sheet, the high-thermal-conductivity sheet is a graphite sheet or a metal foil, and a cold end side of the thermoelectric conversion module is additionally provided with a heat-conducting ceramic or a high-conductivity composite material gasket.

[0012] Optionally, the upper corrugated plate and the lower corrugated plate are made of a high-temperature alloy material, and the high-temperature alloy material is GH4169.

[0013] In a second aspect, an embodiment of the present application provides a gas turbine, including the thermoelectric wave-shaped regenerator according to any one of the above-mentioned embodiments, the thermoelectric wave-shaped regenerator is installed in an exhaust path of the gas turbine, a cold flow channel of the thermoelectric wave-shaped regenerator is connected with an outlet of a compressor of the gas turbine, and a hot flow channel of the thermoelectric wave-shaped regenerator is connected with a turbine exhaust port of the gas turbine.

[0014] Optionally, direct current output by the thermoelectric wave-shaped regenerator is used for power supply of a sensor of the gas turbine, power supply of auxiliary equipment, or power buffer units of a turbine control system of the gas turbine.

[0015] The beneficial effects of the present application are: the present application embeds a thermoelectric conversion module at the contact between the upper layer wave trough and the lower layer wave peak of the corrugated channel, utilizes the natural temperature difference between the exhaust gas and the compressed air of the gas turbine, constructs a thermal-electric functional interface with the upper and lower as the hot end and the left and right as the cold end, and effectively realizes the integration of heat exchange and power generation. The geometric difference design of the corrugated channel forms a stable temperature difference distribution between the cold and hot flow channels, providing a basis for efficient operation of the thermoelectric power generation device. The structure avoids the space occupation problem of the external hanging design, has good integration, hot end-cold end interface adaptability and operation stability under typical working conditions of the gas turbine, and can effectively improve the utilization depth of tail gas waste heat and the overall energy efficiency level of the system. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the related art, the drawings needed to be used in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0017] Figure 1 The structure diagram of the thermoelectric power generation corrugated regenerator in the embodiment of the present application;

[0018] Figure 2 The outer shape diagram of the thermoelectric power generation corrugated regenerator in the embodiment of the present application;

[0019] Figure 3 The channel cross-sectional view of the thermoelectric power generation corrugated regenerator in the embodiment of the present application;

[0020] Figure 4 The principle diagram of the gas turbine regenerative system in the embodiment of the present application.

[0021] Figures: 100, corrugated channel structure unit; 110, upper corrugated plate; 120, lower corrugated plate; 130, module notch; 11, hot flow channel; 12, cold flow channel; 200, thermoelectric power generation device; 210, thermoelectric conversion module; 211, hot end; 212, cold end; 300, shell packaging. DETAILED DESCRIPTION

[0022] The concept, specific structure and technical effects of the present application will be described clearly and completely in the following embodiments and drawings, so as to fully understand the purpose, scheme and effect of the present application. It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0023] The technical terms involved in the present application will be introduced first as follows:

[0024] Gas turbine: A heat engine that extracts some of the heat energy from a fuel and converts it into mechanical work. It is widely used in power generation, marine propulsion, aviation, and oil and gas industries.

[0025] Recuperator: A heat exchanger that recovers waste heat from the high-temperature exhaust gas of a gas turbine and transfers heat to a low-temperature fluid, improving overall thermal efficiency.

[0026] Corrugated channel: A fluid channel with a periodic wavy structure on the surface. Its geometric profile can be adjusted by parameters such as wave height and wave distance to enhance heat transfer and flow disturbance.

[0027] Thermoelectric conversion module: A thermoelectric conversion device based on the Seebeck effect, consisting of a hot end and a cold end. When there is a temperature difference between the two ends, it can generate direct current electricity, with the advantages of no moving parts and compact structure.

[0028] Hot end / cold end: The hot end of the thermoelectric conversion module contacts the high-temperature channel, while the cold end contacts the cooling medium or heat exchange surface. The temperature difference between the two is the driving force for power generation.

[0029] Wave parameter (N): A geometric index that controls the shape of the corrugated channel, determining the sharpness and flatness of the wave shape, and thus affecting the local flow velocity distribution, pressure drop characteristics, and heat transfer effect.

[0030] With the increasing global energy shortage and carbon emission control pressure, improving the energy utilization rate of thermal mechanical systems and developing high-efficiency energy recovery technology have become important research directions in the field of gas turbines. Gas turbines are widely used in aviation propulsion, distributed energy, and ship power, and their thermal efficiency is limited by the energy loss of high-temperature gas in the typical Brayton cycle.

[0031] As a key component for improving the thermal efficiency of gas turbines, the basic principle of the recuperator is to use the high-temperature exhaust gas from the turbine to preheat the air compressed by the compressor, thereby reducing the fuel consumption in the combustion chamber and improving the overall thermal efficiency of the system. Recuperators commonly use plate-type, shell-and-tube, and other structural forms to achieve energy recovery through heat exchange between cold and hot flow channels. However, traditional recuperators only recover the "thermal energy" part of the exhaust gas, and do not convert and utilize the existing temperature difference into electrical energy, resulting in insufficient development of system energy, and there is still room for optimization in terms of pressure loss, heat transfer efficiency, and other issues.

[0032] In recent years, thermoelectric generation technology (TEG) has become an important means of deep heat recovery in high-temperature environments due to its simple structure, lack of moving parts, and ability to directly convert waste heat into electrical energy. Thermoelectric generator devices can output stable direct current based on the Seebeck effect when there is a temperature difference between the hot end and the cold end. Therefore, if TEG can be embedded in a regenerator structure, it can utilize the existing temperature difference between the cold and hot flow channels in a gas turbine to generate electricity, further improving the energy efficiency ratio and comprehensive energy utilization level of the system. Existing research has attempted to use TEG for exhaust heat recovery in internal combustion engines, power plant exhaust gas power generation, and other scenarios, but there are still many challenges in integrating thermoelectric conversion modules into the high-temperature, high-flow, and space-limited structure of gas turbines.

[0033] In summary, the present application proposes an integrated structure that embeds a thermoelectric conversion module in the cold-heat interface area of a corrugated regenerator, which utilizes the geometric differences of the corrugated channels to form inherent asymmetry in the cross-section and flow of the cold and hot flow channels, thereby achieving an integrated design of heat recovery and electricity conversion. In contrast, related technologies either fail to deeply integrate with the regenerator structure or have complex structures that make it difficult to achieve stable and efficient thermoelectric conversion in the high-temperature, high-flow operating environment of a gas turbine.

[0034] Referring to Figure 1 and Figure 2 , the present application provides a thermoelectric corrugated regenerator, comprising: A corrugated channel structure unit 100, comprising an upper corrugated plate 110 and a lower corrugated plate 120, the upper corrugated plate 110 and the lower corrugated plate 120 are arranged in a staggered manner, forming alternating hot flow channels 11 and cold flow channels 12; It should be noted that the waveform of the corrugated plate is asymmetric cosine-shaped, and the geometric characteristics of each group of channels can be set by the waveform parameter N. The hot flow channel 11 is arranged in the space above and below the corrugated plate, used to guide the high-temperature exhaust gas discharged from the gas turbine. The cold flow channel 12 is arranged between the hot flow channels 11 and alternately arranged with the hot flow channels 11, used to guide the pressurized air from the gas turbine compressor outlet to preheat before entering the combustion chamber.

[0035] A thermoelectric device 200 is embedded in the interface area between the upper corrugated plate 110 and the lower corrugated plate 120 and penetrates between the left and right cold flow channel 12 walls; The thermoelectric device 200 is embedded in the valley-peak contact part of the upper and lower corrugated plates 120 in a rectangular structure and penetrates between the left and right cold flow channel 12 walls. The upper and lower wide surfaces are directly in contact with the hot flow channel 11 of the high-temperature exhaust gas, forming a hot end 211 surface; while the left and right narrow surfaces are embedded between the cold air flow channel walls and in contact with the pressurized air, forming a cold end 212 surface.

[0036] The housing package 300 packages a plurality of the corrugated channel structure units 100 as a modular body.

[0037] The application provides a thermoelectric wave-shaped regenerator suitable for a gas turbine system, which is compact in structure and high in integration, can realize waste heat electric energy recovery on the basis of effective heat exchange, and improves the overall energy efficiency of the system. The thermoelectric wave-shaped regenerator is constructed in the form of staggered combination of upper and lower wave-shaped plates 120 to form cold and hot flow channels 11, hot and cold flow conversion modules 210 are embedded in the interface regions thereof, and electricity is generated by driving through the temperature difference between the cold and hot flows. The thermoelectric wave-shaped regenerator is particularly suitable for high-temperature and high-speed exhaust conditions of the gas turbine and high-pressure cold air regenerative requirements, and has stability and maintainability for long-term operation.

[0038] In some embodiments, the thermoelectric power generation device 200 comprises a plurality of thermoelectric conversion modules 210, which are embedded in the abutting positions of each of the hot flow channels 11 and the cold flow channels 12 in the form of a sheet-shaped module array, the upper and lower surfaces of the thermoelectric conversion modules 210 are hot ends 211 and are in contact with the hot flow channels 11, and the left and right side surfaces of the thermoelectric conversion modules 210 are cold ends 212 and are in heat exchange with the wall surfaces of the cold flow channels 12.

[0039] In some embodiments, the corrugated channel geometry of the corrugated channel structure unit 100 is adjustable, and the corrugated channel geometry includes wave height, wave distance, and wave shape parameters for controlling the shape of the wave.

[0040] By embedding the thermoelectric conversion modules 210 at the abutting positions of each of the cold and hot flow channels 11, a sheet-shaped module array is formed, and the electric power output scale can be determined according to the module spacing and length. The corrugated channel geometry (such as wave height, wave distance, and wave shape offset) is adjustable, so that the flow, flow rate and temperature difference of the cold and hot flow channels 11 are more matched, and the power generation efficiency and heat recovery performance are improved.

[0041] In some embodiments, the cold end 212 of the thermoelectric conversion module 210 is provided with a high-thermal-conductivity and thermal-insulation composite gasket.

[0042] The thermoelectric conversion module 210 is closely attached to the hot flow channel 11 through a heat-conducting material, and a high-thermal-conductivity and thermal-insulation composite gasket is arranged on the side of the cold end 212, so as to improve the temperature difference maintenance capability and avoid short circuit.

[0043] In some embodiments, the wave shape of the upper wave-shaped plate 110 and the lower wave-shaped plate 120 is an adjustable asymmetric periodic curve designed based on a variable parameter function, and the variable parameter function is in the form of:

[0044] wherein, H(x) is the height of the corrugated curve at position x, H is the total height between the peak and the valley, P is the period length of the corrugation, and i is the number of the wave form, is the position coordinate along the length direction of the channel, and N is the wave form parameter that controls the steepness and the degree of asymmetry of the wave form. The value of N ranges from 0.5 to 2.0. By adjusting the value of N, controllable deformation can be achieved from a standard cosine wave form (N = 1) to a sharp peak or a flat platform corrugation.

[0045] Reference Figure 3 In order to enhance the heat exchange efficiency between the hot flow and the cold flow and improve the fit between the embedded thermoelectric conversion module 210 and the channel interface, the present application adopts a parameterizable asymmetric corrugated channel design, the geometric profile of which is described by a variable parameter function. The variable parameter function has the following technical features and design advantages: Adjustable heat exchange area and pressure drop control: By changing the wave form parameter N, the sharpness of the wave form can be controlled without affecting the overall peak and valley height, thereby achieving a balance between heat transfer enhancement and flow resistance optimization; Adapt to the installation structure of the thermoelectric conversion module 210: Unlike the traditional cosine wave or triangular wave, this wave form has a more obvious peak / valley platform area, which can accurately correspond to the embedded area of the thermoelectric conversion module 210, improving the contact area and thermal coupling efficiency; Good manufacturability and structural stability: The function curve used is mathematically continuous and derivable, making it easy to achieve mass production through numerical control machining or sheet metal forming process; High-efficiency heat flux conduction path: Through the spatial distribution of this type of wave form, a larger heat exchange interface is formed between the hot flow channel 11 and the cold channel, and multiple-point heat flux input is achieved in the peak / valley direction, which is beneficial to maintaining the temperature difference of the thermoelectric conversion module 210 end face.

[0046] In the actual structure, this wave form is used to construct the cold and hot flow channels 11 between the upper and lower corrugated plates 110 and 120, and indirect heat exchange of cold and hot fluids and high-temperature difference driving of the power generation module are achieved through periodic wave forms. Compared with traditional corrugated plates, this design has higher geometric flexibility and energy recovery efficiency.

[0047] In some embodiments, the upper and lower corrugated plates 110 and 120 have module notches 130 at the peaks of the wave forms, the thermoelectric conversion module 210 is embedded in the module notches 130, the module notches 130 are integrally made by laser cutting or mold forming process, and the boundaries of the thermoelectric conversion module 210 and the plate surfaces of the upper and lower corrugated plates 110 and 120 are sealed and closed airtight and the heat conduction is strengthened by using high-thermal-conductivity insulating glue or brazing.

[0048] In some embodiments, the packaging structure of the thermoelectric conversion module 210 adopts brazing and ceramic insulation protection, the insulation thickness of the ceramic insulation protection is 0.5-1mm, the contact surface of the hot end 211 of the thermoelectric conversion module 210 is configured with a high-thermal-conductivity sheet, the high-thermal-conductivity sheet is a graphite sheet or a metal foil, and a heat-conducting ceramic or a high-thermal-conductivity composite material gasket is attached to the side of the cold end 212 of the thermoelectric conversion module 210.

[0049] In some embodiments, the upper corrugated plate 110 and the lower corrugated plate 120 are made of a high-temperature alloy material, and the high-temperature alloy material is GH4169.

[0050] To realize structural integration and compact arrangement, the application directly embeds the thermoelectric conversion module 210 in the manufacturing or assembly process by reserving a module notch 130 at the wave peak of the upper and lower corrugated plates 120. The notch is integrally made by laser cutting or mold forming process, and the high-thermal-conductivity insulation glue or brazing method is used between the module boundary and the plate surface to realize airtight sealing and heat conduction strengthening, so as to ensure structural stability and heat exchange efficiency. The specific implementation is as follows:

[0051] Corrugated plate material and structure: high-temperature alloy material (such as GH4169) is used, which has heat resistance and corrosion resistance; the wave shape has high manufacturing precision, which is beneficial to module positioning and embedding.

[0052] Thermoelectric conversion module 210 design and packaging: the module structure is customized to match the size of the corrugated notch, the packaging structure adopts brazing + ceramic insulation protection, which avoids thermal runaway and electrical short circuit, and the insulation thickness is 0.5-1mm.

[0053] Heat conduction and heat insulation auxiliary structure: the high-thermal-conductivity sheet (graphite sheet or metal foil) is arranged on the contact surface of the hot end 211, and the heat-conducting ceramic or high-thermal-conductivity composite material gasket is attached to the side of the cold end 212, so as to ensure constant temperature difference between the two ends and improve the thermoelectric conversion efficiency.

[0054] Installation and replacement mechanism: the module is inserted in the form of a sheet array and is fixed between the upper and lower corrugated plates 120 by clamping, and can be replaced individually, which is convenient for maintenance.

[0055] Referring to Figure 4 The application provides a gas turbine, which comprises the thermoelectric wave heat regenerator described in any one of the above aspects, the thermoelectric wave heat regenerator is installed in the exhaust path of the gas turbine, the cold flow channel 12 of the thermoelectric wave heat regenerator is connected with the outlet of the compressor of the gas turbine, and the hot flow channel 11 of the thermoelectric wave heat regenerator is connected with the turbine exhaust port of the gas turbine.

[0056] In some embodiments, the direct current output by the thermoelectric wave heat regenerator is used to power the sensors of the gas turbine, power the auxiliary equipment or access the power buffer unit of the turbine control system of the gas turbine.

[0057] Specifically, the thermoelectric wave-shaped regenerator can be embedded in the gas turbine body, directly connected with the original tail gas pipeline and compressed air pipeline, and does not need to be additionally provided with a support or a cooling system. The output electric energy can be used for powering sensors, auxiliary equipment or an electric power buffer unit of a turbine control system, and has a certain self-power supply capability.

[0058] As shown in the accompanying drawings, the operation process of the thermoelectric wave-shaped regenerator is as follows: Figure 4 The high-pressure air (cold end 212) at the outlet of the compressor enters the regenerator through the cold flow channel 12 and is preheated before entering the combustion chamber.

[0059] The high-temperature gas generated by the combustion chamber is discharged after work by the turbine, flows through the upper and lower parts of the regenerator through the hot flow channel 11, is arranged adjacent to the cold air partition, and realizes heat transfer.

[0060] The thermoelectric conversion module 210 located between the cold and hot flow channels 11 has its upper and lower surfaces (hot end 211) in contact with the high-temperature exhaust gas and its left and right side surfaces (cold end 212) in heat exchange with the cold air flow channel wall surface through a heat conduction structure, thereby forming a stable temperature difference.

[0061] Due to the Seebeck effect, a potential difference is formed between the two ends of the thermoelectric conversion module 210, direct current can be output, and heat energy-electricity conversion is realized.

[0062] Compared with the thermoelectric regenerative system in the related art, the present application proposes an integrated design scheme in which the thermoelectric conversion module 210 is deeply integrated with the wave-shaped regenerator structure. The related art mostly uses a planar thermoelectric conversion module 210 attached to a heat source or arranged on the outside structure of a flow channel, which not only has the problems of structural redundancy, long heat exchange path and low temperature difference utilization rate, but also has insufficient stability in the application occasions of heat flow disturbance or limited space.

[0063] The present application embeds the thermoelectric conversion module 210 in the cold and hot flow interface and constructs the wave-shaped channel in the form of a variable parameter function, thereby realizing the synchronous optimization of heat flow disturbance enhancement and module temperature difference driving, effectively improving the thermoelectric conversion efficiency and heat recovery capacity. The structure design is compact, the functional integration degree is high, the energy recovery system is suitable for various high-temperature and cold-heat intersection working conditions, and has good application expandability and engineering implementability.

[0064] Specifically, the present application proposes a wave-shaped channel structure described by an adjustable parameter function. The wave-shaped channel structure is designed based on a variable parameter function waveform, has stronger geometric adjustability, local thermal coupling adaptability and manufacturing realizability compared with traditional cosine / rectangular wave shapes, and provides an optimized support interface for the embedded thermoelectric conversion module 210.

[0065]

[0066] ​The partition embedded integrated structure of the thermoelectric conversion module 210: the thermoelectric conversion module 210 is integrated with the corrugated plate channel through a multi-section clamping or embedding mode to form a stable contact surface of the cold and hot ends 211, thereby avoiding the increase of thermal resistance or output power fluctuation caused by poor adhesion of the module in the traditional structure.

[0067] The three-stage heat passage coupling structure design of the "hot end 211-heat recovery-cold end 212": the device realizes the heat flow direction coupling of "high-temperature fluid-thermoelectric conversion module 210-low-temperature cooling channel" in the flow channel, which not only meets the heat recovery efficiency, but also provides a high temperature difference drive to enhance the power generation capacity of the TEG.

[0068] The compact and functional thermoelectric coupling device scheme: the device has both heat recovery and power generation functions, which avoids the heat transfer efficiency loss and structural complexity caused by the separate arrangement of the heat recovery structure and the thermoelectric conversion module 210 in the prior art, and is suitable for system scenarios with limited space or complex heat flow characteristics.

[0069] The thermoelectric power generation application scenario suitable for gas turbines or other light and high heat flow equipment: the structure of the present application not only has high heat exchange capacity, but also can realize waste heat power generation without significantly increasing the system resistance, and is particularly suitable for energy systems with high requirements for weight and compactness in the working conditions of gas turbines, aviation propulsion devices and the like.

[0070] The above is a specific description of the preferred implementation of the present disclosure, but the present disclosure is not limited to the above embodiments. Those skilled in the art can make various equivalent modifications or replacements without departing from the spirit of the present disclosure, and these equivalent modifications or replacements are all included in the scope defined by the claims of the present disclosure.

Claims

1. A thermoelectric corrugated regenerator, characterized in that, include: The corrugated channel structure unit includes an upper corrugated plate and a lower corrugated plate, which are arranged in an alternating manner to form hot flow channels and cold flow channels. Thermoelectric generator is embedded in the junction area between the upper corrugated plate and the lower corrugated plate, and runs through the walls of the cold flow channels on both sides. The outer shell encapsulates the multiple corrugated channel structural units into a modular body.

2. The thermoelectric corrugated regenerator according to claim 1, characterized in that, The thermoelectric power generation device includes multiple thermoelectric conversion modules. The thermoelectric conversion modules are embedded in the docking part of each hot flow channel and cold flow channel in the form of a plate module array. The upper and lower surfaces of the thermoelectric conversion modules are hot ends and are in contact with the hot flow channels. The left and right sides of the thermoelectric conversion modules are cold ends and exchange heat with the walls of the cold flow channels.

3. The thermoelectric corrugated regenerator according to claim 2, characterized in that, The cold end of the thermoelectric conversion module is equipped with a composite gasket with high thermal conductivity and insulation.

4. The thermoelectric corrugated regenerator according to claim 1, characterized in that, The corrugated channel structure unit has an adjustable corrugated channel geometry configuration, which includes wave height, wave pitch, and waveform parameters that control the waveform shape.

5. The thermoelectric corrugated regenerator according to claim 1, characterized in that, The waveforms of the upper corrugated plate and the lower corrugated plate are adjustable asymmetric periodic curves designed based on a variable parameter function, the form of which is: in, The height of the corrugated curve at position x. The total height between the crests and troughs, P is the ripple period length, and i is the waveform number. is the position coordinate along the length of the channel, and N is the waveform parameter that controls the steepness and asymmetry of the waveform.

6. The thermoelectric corrugated regenerator according to claim 2, characterized in that, The upper corrugated plate and the lower corrugated plate have pre-reserved module slots at their crests. The thermoelectric conversion module is embedded in the module slots. The module slots are integrally formed by laser cutting or molding. The boundary of the thermoelectric conversion module and the surface of the upper and lower corrugated plates are sealed with high thermal conductivity insulating adhesive or brazing to achieve hermetical sealing and enhanced heat conduction.

7. A thermoelectric corrugated regenerator according to claim 2, characterized in that, The thermoelectric conversion module is packaged with brazing and ceramic insulation protection. The insulation thickness of the ceramic insulation protection is 0.5-1mm. The hot end contact surface of the thermoelectric conversion module is equipped with a high thermal conductivity sheet, which is a graphite sheet or metal foil. The cold end side of the thermoelectric conversion module is equipped with a thermally conductive ceramic or high thermal conductivity composite material gasket.

8. The thermoelectric corrugated regenerator according to claim 1, characterized in that, The upper corrugated plate and the lower corrugated plate are made of high-temperature alloy material, namely GH4169.

9. A gas turbine, characterized in that, The device includes the thermoelectric power generation corrugated regenerator as described in any one of claims 1-8, wherein the thermoelectric power generation corrugated regenerator is installed in the exhaust gas path of the gas turbine, the cold flow channel of the thermoelectric power generation corrugated regenerator is connected to the compressor outlet of the gas turbine, and the hot flow channel of the thermoelectric power generation corrugated regenerator is connected to the turbine exhaust port of the gas turbine.

10. A gas turbine according to claim 9, characterized in that, The DC power output from the thermoelectric corrugated regenerator is used to power the sensors of the gas turbine, power auxiliary equipment, or connect to the power buffer unit of the turbine control system of the gas turbine.

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