CN216851790U - Automobile exhaust waste heat power generation device capable of enhancing heat transfer - Google Patents

Abstract

The utility model discloses an automobile exhaust waste heat power generation device for enhancing heat transfer, which is arranged on an exhaust pipeline of an automobile and comprises a heat exchange component, a thermoelectric module and a cold exchange component, wherein the heat exchange component is arranged on the exhaust pipeline; the heat exchange assembly comprises an outer pipe body, the outer pipe body is connected with the exhaust pipeline in a sealing mode, and the thermoelectric module is arranged on the outer side of the outer pipe body; the cold exchange assembly comprises a cooling box, and the thermoelectric module is arranged between the outer pipe body and the cooling box; and the power output end of the thermoelectric module is communicated with an automobile storage battery. It can guarantee that heat exchanger shell surface temperature is even, improves thermoelectric module hot junction heat flux density and temperature uniformity to supply more thermoelectric module hot junctions to be heated, thereby improve thermoelectric generator total generated energy, and then improve the utilization ratio of automobile exhaust waste heat.

Description

Automobile exhaust waste heat power generation device capable of enhancing heat transfer

Technical Field

The utility model relates to an automobile waste heat recovery technical field specifically indicates a car exhaust waste heat power generation facility of reinforcing heat transfer.

Background

The automobile brings convenience to life of people and promotes social development. However, it also brings a series of problems, the most major of which are energy shortage and environmental pollution. According to statistical data, the automobile accounts for 38% of the global oil demand each year, and the automobile emits 16.4% of the global carbon dioxide emission. Whereas for a typical internal combustion engine only 25% of the fuel energy is available on average, i.e. for driving the vehicle, about 5% is dissipated by friction, and the remaining 70% is expelled as thermal energy through the exhaust gases or absorbed by the engine coolant.

Therefore, the waste heat recovery has important significance for energy conservation and emission reduction of the automobile. If a part of automobile waste heat can be recovered and converted into electric energy, the carbon emission can be effectively reduced while the efficiency of a vehicle system is greatly improved.

The thermoelectric generator is formed by connecting a plurality of cuboid P-type semiconductors and N-type semiconductors through conductive layers, can directly convert heat energy into electric energy through the Seebeck effect, can meet the requirements of improving fuel efficiency and reducing harmful gas emission, and has the advantages of simple structure, light weight, no mechanical moving parts, safety, reliability and the like. In 1998, Nissan automotive companies manufactured the first thermoelectric devices for gasoline engine vehicles based on Si-Ge materials. A conventional thermoelectric generator for an automobile is composed of a heat exchanger and thermoelectric modules attached to the surface thereof. The thermoelectric conversion efficiency of the thermoelectric module is affected by the figure of merit ZT value of the thermoelectric material, the temperature difference across the thermoelectric module, and the geometry of the thermoelectric legs. The temperature difference between the hot end and the cold end of the thermoelectric module is obviously smaller than the temperature difference between the hot fluid and the cold fluid, which is the main reason for the low efficiency of the thermoelectric generator, and the reason for the small temperature difference between the cold end and the hot end is the thermal resistance between the fluid and the thermoelectric module. Therefore, many researchers at home and abroad are beginning to focus on improving the energy conversion efficiency of thermoelectric generators by enhancing the heat transfer between cold and hot fluids and thermoelectric modules. Filling annular ligaments or foam copper in a heat exchanger channel of a thermoelectric generator is a method for enhancing heat transfer, but can generate larger exhaust back pressure of the engine and generate negative influence on an exhaust system of the engine; the multi-fin structure is added in the exhaust channel and the cold end of the thermoelectric module to enhance the heat transfer and heat dissipation capacity, so that the heat transfer capacity between the hot fluid and the thermoelectric module can be increased, and the net power of the automobile thermoelectric generator cannot be greatly influenced.

In recent years, with the rapid development of thermoelectric materials, thermoelectric materials and geometric structures with higher conversion efficiency have been obtained, but the heat transfer mode in the existing automobile thermoelectric generator technology is still to be improved. The low heat transfer coefficient of the exhaust pipe and the heat exchanger leads to the adoption of a solid heat conduction and heat flow energy exchange mode at the hot end, the heat transfer coefficient is small, the energy conversion efficiency is low, and a large space and a large heat transfer area are needed, which need to be broken through in the subsequent research.

Disclosure of Invention

The utility model aims at providing an automobile exhaust waste heat power generation device that reinforcing was conducted heat, it can guarantee that heat exchanger shell surface temperature is even, improves thermoelectric module hot junction heat flux density and temperature homogeneity to supply more thermoelectric module hot junctions to be heated, thereby improve thermoelectric generator total generated energy, and then improve the utilization ratio of automobile exhaust waste heat.

In order to achieve the above purpose, the present invention provides an automobile exhaust waste heat power generation device with enhanced heat transfer, which is arranged on an exhaust duct of an automobile, and comprises a heat exchange assembly, a thermoelectric module and a cold exchange assembly, wherein the heat exchange assembly is arranged on the exhaust duct, the thermoelectric module is arranged on the heat exchange assembly, and the cold exchange assembly is arranged on the thermoelectric module; the heat exchange assembly comprises an outer pipe body, the outer pipe body is connected with the exhaust pipeline in a sealing mode, and the thermoelectric module is arranged on the outer side of the outer pipe body; the cold exchange assembly comprises a cooling box, and the thermoelectric module is arranged between the outer pipe body and the cooling box; and the power output end of the thermoelectric module is communicated with an automobile storage battery.

Furthermore, the heat exchange assembly further comprises an inner pipe body, guide fins are arranged between the inner pipe body and the outer pipe body and are evenly distributed along the radial direction of the inner pipe body, and two ends of each guide fin are fixedly connected with the inner pipe body and the outer pipe body respectively. Like this, the tail gas flow channel is compressed to hollow interior body, has reduced the gas velocity of flow, and the water conservancy diversion fin has increased the area of contact of thermal current and outer body, has increased the heat transfer of thermal current and thermoelectric module hot junction promptly, makes thermoelectric module's hot junction can fully be heated. Through setting up interior body and guide fin, improved heat exchange efficiency, because the lower velocity of flow of gas and the temperature that reduces gradually, can not produce too big pressure drop, improved thermoelectric power generation device's net power, be favorable to improving the fuel economy of engine.

Further, the heat exchange assembly further comprises a reducing pipe, and the reducing pipe is connected with the outer pipe body and the exhaust pipeline in a sealing mode respectively. Like this, through reducing pipe with heat exchange assembly and exhaust duct sealing connection to enlarge the heat exchange area, gaseous even diffusion when being favorable to tail gas to flow through the box guarantees that heat exchanger shell surface temperature is even.

Furthermore, cold exchange assembly still includes feed liquor pipe and drain pipe, feed liquor pipe and drain pipe set up on the cooling tank and with the inside intercommunication of cooling tank, feed liquor pipe and drain pipe and automobile engine cooling water tank intercommunication form cooling cycle.

Furthermore, one end of the inner pipe body is provided with a flow guide ring, and the flow guide ring is arranged at the air inlet end of the heat exchange assembly. Therefore, the tail gas flow channel is further compressed through the guide ring, the gas flow rate is reduced, the heat transfer between heat flow and the hot end of the thermoelectric module is increased, and the hot end of the thermoelectric module can be fully heated.

Furthermore, a plane is arranged on the outer tube body, and the thermoelectric module is arranged on the outer plane of the outer tube body. Like this, conveniently with thermoelectric module setting on outer body, it is more firm to install on the plane, improves the durability of whole device.

Furthermore, a plurality of planes are arranged on the outer tube body, a plurality of thermoelectric modules are arranged on the outer tube body, and the plurality of thermoelectric modules are respectively arranged on the plurality of outer planes of the outer tube body.

Preferably, the plurality of thermoelectric modules are arranged in groups on the outer plane of the outer pipe body, the thermoelectric modules in each group are connected in series, and a plurality of groups of the thermoelectric modules are connected in parallel.

As a preferred option, the cooling box is also provided with a plurality of cooling boxes, the plurality of cooling boxes are respectively arranged on each outer plane of the outer pipe body, and the cooling box is further sleeved with a hoop. Like this, fix a plurality of cooling tanks through the clamp, improve the durability of whole device.

Preferably, the flow of cooling liquid in the cooling tank is opposite to the flow of gas in the heat exchange assembly. Therefore, the temperature difference between the cold end and the hot end of all the thermoelectric modules in the axial direction is consistent, and the generating power of the thermoelectric generator is improved.

The utility model has the advantages that:

1. the hollow polygonal pipe body provided with the guide ring and the guide fins is adopted, when automobile exhaust passes through a polygonal pipe body channel, shunting can be generated, the thickness of a flowing boundary layer is reduced, the contact area of heat flow and the polygonal pipe body is increased, namely, the heat transfer with the hot end of the thermoelectric module is increased, so that the hot end of the thermoelectric module can be fully heated, more heat can be absorbed by the thermoelectric module, and the temperature of the hot end of the thermoelectric module is maintained; meanwhile, cooling water in a cooling unit of an automobile engine is used as a cooling medium, the temperature of the cold end of the thermoelectric module is reduced through a circulating water pump and a plurality of single-row cooling water tanks, the flowing direction of the cooling water is opposite to the flowing direction of tail gas at the hot end, so that the consistency of temperature differences at the cold end and the hot end of all the thermoelectric modules in the axial direction is realized, and the power generation power of the thermoelectric generator is improved;

2. because the temperature of the tail gas is gradually reduced from the gas inlet to the gas outlet, the tail gas flow channel is compressed by the increased cylindrical hollow tube body, the heat transfer area is increased by the increased axial fins, the gas flow rate is reduced, on one hand, the heat exchange efficiency is improved, on the other hand, because the gas has lower flow rate and gradually reduced temperature, too large pressure drop can not be generated, the net power of the thermoelectric power generation device is improved, and the fuel economy of an engine is improved;

3. the axial flow guide fins additionally arranged on the polygonal pipe body are beneficial to uniform diffusion of gas when tail gas flows through the box body, the uniform temperature of the surface of a shell of the heat exchanger is ensured, the heat flow density and the temperature uniformity of the hot end of the thermoelectric module are improved, more hot ends of the thermoelectric module are heated, the total generated energy of the thermoelectric generator is improved, and the utilization rate of automobile tail gas waste heat is improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without inventive exercise.

FIG. 1 is a schematic view of the present invention;

FIG. 2 is a schematic view of the internal structure of the present invention;

FIG. 3 is an exploded schematic view of a heat exchange assembly.

In the figure: the thermoelectric module comprises an exhaust pipeline 1, a heat exchange assembly 2 (wherein, an outer pipe 2.1, an inner pipe 2.2, a guide fin 2.3, a reducing pipe 2.4 and a guide ring 2.5), a thermoelectric module 3 and a cold exchange assembly 4 (wherein, a cooling box 4.1, a liquid inlet pipe 4.2, a liquid outlet pipe 4.3 and a clamp 4.4).

Detailed Description

The invention will be described in further detail with reference to the following figures and specific embodiments:

the automobile exhaust waste heat power generation device capable of enhancing heat transfer, as shown in fig. 1-3, is arranged on an exhaust pipeline 1 of an automobile, and comprises a heat exchange assembly 2, a thermoelectric module 3 and a cold exchange assembly 4, wherein the heat exchange assembly 2 is arranged on the exhaust pipeline 1, the thermoelectric module 3 is arranged on the heat exchange assembly 2, and the cold exchange assembly 4 is arranged on the thermoelectric module 3;

the heat exchange assembly 2 comprises an outer pipe body 2.1, the outer pipe body 2.1 is connected with the exhaust pipeline 1 in a sealing mode, and the thermoelectric module 3 is arranged on the outer side of the outer pipe body 2.1;

the cold exchange assembly 4 comprises a cooling box 4.1, and the thermoelectric module 3 is arranged between the outer pipe body 2.1 and the cooling box 4.1;

and the power output end of the thermoelectric module 3 is communicated with an automobile storage battery.

Further, the heat exchange assembly 2 further comprises an inner tube 2.2, guide fins 2.3 are arranged between the inner tube 2.2 and the outer tube 2.1, the guide fins 2.3 are uniformly arranged along the radial direction of the inner tube 2.2, and two ends of each guide fin 2.3 are fixedly connected with the inner tube 2.2 and the outer tube 2.1 respectively.

Further, the heat exchange assembly 2 further comprises a reducing pipe 2.4, and the reducing pipe 2.4 is hermetically connected with the outer pipe body 2.1 and the exhaust pipeline 1 respectively.

Furthermore, cold exchange assembly 4 still includes feed liquor pipe 4.2 and drain pipe 4.3, feed liquor pipe 4.2 and drain pipe 4.3 set up on cooling tank 4.1 with inside intercommunication of cooling tank 4.1, feed liquor pipe 4.2 and drain pipe 4.3 and automobile engine cooling water tank intercommunication form cooling cycle.

Further, one end of the inner pipe body 2.2 is provided with a flow guide ring 2.5, and the flow guide ring 2.5 is arranged at the air inlet end of the heat exchange assembly 2.

Furthermore, be equipped with the plane on outer body 2.1, thermoelectric module 3 sets up on the outer plane of outer body 2.1.

Furthermore, a plurality of planes are arranged on the outer tube body 2.1, a plurality of thermoelectric modules 3 are also arranged, and the plurality of thermoelectric modules 3 are respectively arranged on the plurality of outer planes of the outer tube body 2.1.

Preferably, a plurality of the thermoelectric modules 3 are arranged in groups on the outer plane of the outer tube body 2.1, the thermoelectric modules 3 in each group are connected in series, and a plurality of groups of the thermoelectric modules 3 are connected in parallel.

Preferably, the cooling boxes 4.1 are also provided in plurality, the plurality of cooling boxes 4.1 are respectively arranged on each outer plane of the outer pipe body 2.1, and the cooling boxes 4.1 are further sleeved with the hoops 4.4.

Preferably, the flow of the cooling liquid in the cooling tank 4.1 is opposite to the flow of the gas in the heat exchange assembly 2.

When the utility model is used in practice,

the cross section of the outer tube body 2.1 is a regular hexagon or a regular octagon;

the thickness of the guide fins 2.3 is 1.5-2mm, and the included angle between every two fins is 10-20 degrees;

the outer pipe body 2.1, the inner pipe body 2.2, the guide fins 2.3, the reducing pipes 2.4 and the guide rings 2.5 are made of copper or aluminum alloy;

the cold end and the hot end of the thermoelectric module 3 are respectively closely attached to the outer wall of the outer pipe body 2.1 or the single-row cooling water pipe of the cooling box 4.1 by coating graphite or heat-conducting silicone grease with high heat-conducting single-sided adhesive;

the inner pipe body 2.2 can be a cylinder with two closed ends or a pipeline; the ratio of the diameter of the inner tube 2.2 to the diameter of the circumscribed circle of the outer tube 2.1 ranges from 0.40 to 0.85;

the thermoelectric modules 3 on the same surface of the outer tube 2.1 are connected in parallel, and the thermoelectric modules 3 on different surfaces and in the same temperature area are connected in series;

the thermoelectric material of the thermoelectric module 3 is selected from a bismuth telluride-based thermoelectric material, a lead sulfide-based thermoelectric material, a cobalt antimonide-based thermoelectric material, a half-hellser-based thermoelectric material or a perovskite oxide-based thermoelectric material;

the reducing pipe 2.4 is funnel-shaped;

a liquid inlet pipe 4.2 and a liquid outlet pipe 4.3 of the single-row cooling box 4.1 are respectively connected with a circulating water pump in parallel to form a cooling cycle;

when in actual use, the working process mainly comprises the following steps:

the tail gas of the automobile carrying a large amount of heat energy flows into the heat exchange component 2, the guide ring 2.5 guides the tail gas entering the heat exchange component 2 into a channel formed between the outer pipe body 2.1 and the inner pipe body 2.2, the guide fins 2.3 uniformly guide the tail gas of the automobile into each separated flow channel, so that the hot fluid is uniformly distributed in the flow channels, the thermoelectric module 3 is ensured to absorb more heat, the temperature of the hot end of the thermoelectric module 3 is maintained, the tail gas of the automobile flows out of the heat exchange component 2 and then enters the silencer for noise reduction treatment, and finally the tail gas is discharged out of the exhaust pipe 1;

the cold exchange component 4 adopts cooling water in a cooling unit of an automobile engine as a cooling medium, the temperature of the cold end of the thermoelectric module 3 is reduced through a circulating water pump and a plurality of single-row cooling boxes 4.1, temperature difference is formed at two ends of the thermoelectric module 2, the thermoelectric module converts heat energy into electric energy through the Seebeck effect, the flowing direction of the cooling water is opposite to the flowing direction of tail gas at the hot end, so that the consistency of the temperature difference at the cold end and the hot end of all the thermoelectric modules 3 in the axial direction is realized, and the power generation power of the thermoelectric generator is improved.

The utility model discloses a theory of operation does: the energy efficiency of the semiconductor thermoelectric power generation device is related to the temperature difference between two ends of the thermoelectric module 3, and the larger the temperature difference between two ends is, the higher the power generation efficiency is. Therefore, the tail gas carrying heat is closely contacted with the outer pipe body 2.1 and the inner pipe body 2.2 which are added with the axial flow guide fins 2.3 in a large area, the outer side of the outer pipe body 2.1 is closely attached to the hot end of the thermoelectric module 3 through a high heat conduction interface material, the thermal contact resistance between the outer pipe body and the hot end is small, and the heat transfer performance is good; the cold end of thermoelectric module 3 is cooled down by the cooling water among the car cooling unit, and the heat transfer area between them is great, can exchange the heat high-efficiently, maintains cold junction temperature. The thermoelectric power generation piece has the advantages of small thermal contact resistance at the hot end, large heat flow density, good temperature uniformity, large heat dissipation area at the cold end, large temperature difference at the two ends of the thermoelectric module, and high conversion efficiency and output power of the thermoelectric power generator.

Example (b):

the embodiment provides an automobile exhaust waste heat power generation device for enhancing heat transfer, an automobile exhaust pipeline 1 is connected with a polygonal outer pipe body 2.1 through a reducing pipe 2.4, and the air inlet end and the air outlet end of a heat exchange assembly 2 are respectively connected with an automobile engine exhaust pipe 1 and an exhaust pipe 1 silencer; a hollow inner pipe body 2.2 with two sealed ends is arranged inside the polygonal outer pipe body 2.1, the inner pipe body 2.2 is connected with the polygonal outer pipe body 2.1 through a radial guide fin 2.3 outside the inner pipe body, and the inner pipe body 2.2, the polygonal outer pipe body 2.1 and the guide fin 2.3 enclose an accommodating space for accommodating vehicle tail gas; a circular truncated cone-shaped guide ring 2.5 is arranged on the air inlet side of the inner pipe body 2.2; the outer wall of the polygonal outer pipe body 2.1 is tightly attached to one surface of the thermoelectric module 3 through graphite or heat-conducting silicone grease coated with high-heat-conductivity single-side gum, the other surface of the thermoelectric module 3 is tightly attached to the cooling box 4.1 through graphite or heat-conducting silicone grease coated with high-heat-conductivity single-side gum, and the single-row cooling box 4.1 is fixed to the outer wall of the polygonal outer pipe body 2.1 through a plurality of clamps 4.4.

The outer pipe body 2.1, the inner pipe body 2.2, the guide fins 2.3, the reducing pipes 2.4 and the guide rings 2.5 are connected in a welding mode, the guide fins 2.3, the polygonal outer pipe body 2.1 and the single-row cooling boxes 4.1 are made of aluminum alloy with good heat conductivity, and the reducing pipes 2.4 of the tail gas inlet port and the tail gas outlet port are funnel-shaped; the polygonal outer pipe body 2.1 is a thin-wall pipe body with a regular hexagon section; the dimensions (length × width × height) of the single-row cooling box 4.1 are 460mm × 95mm × 26mm, and the thickness is 2 mm; cooling water in a cooling unit of an automobile engine is used as a cooling medium, the temperature of the cold end of the thermoelectric module 3 is reduced through a circulating water pump and a plurality of single-row cooling boxes 4.1, and the flowing direction of the cooling water is opposite to the flowing direction of tail gas at the hot end; the size (length × width × height) of the entire thermoelectric generation device was 860mm × 190mm × 225 mm.

The dimensions (length × width × height) of the polygonal outer tube 2.1 are 460 × 185mm × 160mm, with a thickness of 2 mm; the diameter of the hollow inner tube 2.2 is 80mm, in this embodiment, the ratio of the diameter of the hollow inner tube 2.2 to the diameter of the circumscribed circle of the polygonal outer tube 2.1 is 0.43; the axial height of the circular truncated cone-shaped guide ring 2.5 is 50 mm; the outer part of the hollow inner pipe body 2.2 is provided with 36 radial guide fins 2.3 which are uniformly distributed, the length of the radial guide fins is the same as that of the polygonal outer pipe body 2.1, the thickness of the radial guide fins is 1.5mm, and the included angle of the guide fins 2.3 between every two adjacent radial guide fins is 10 degrees.

Heat-conducting silicone grease is coated on both sides of the thermoelectric module 3 and is respectively in close contact with the polygonal outer tube body 2.1 and the single-row cooling box 4.1; the thermoelectric module 3 adopts a bismuth telluride-based low-temperature thermoelectric module with the model number of TEG1-199-1.5-1.8-250, the external dimension (length, width and height) is 50mm, 50mm and 4mm, and the thermoelectric conversion performance is shown in Table 1; each surface of the polygonal outer tube body 2.1 can be paved with 16 thermoelectric modules 3, each row is arranged by 2 x 8, 96 thermoelectric modules 3 are configured in the whole thermoelectric power generation device, and the interval between every two thermoelectric modules 3 is about 5 mm; thermoelectric modules 3 on the same surface of the polygonal outer tube 2.1 are connected in parallel, thermoelectric modules 3 in different surfaces and the same temperature zone are connected in series, the load is a vehicle-mounted device, and a part of electric energy is stored in an energy storage device for standby.

TABLE 1 Performance parameters of the thermoelectric modules TEG1-199-1.5-1.8-250

The calculation results show that the hexagonal outer tube 2.1 thermoelectric generator without the hollow inner tube 2.2 and the guide fins 2.3 is obtained, 96 thermoelectric modules 3 are arranged on the outer wall of the polygonal outer tube 2.1, the average temperature of hot fluid in the thermoelectric modules is 583K, the average temperature of cooling water is 324K, and the average thermal conductivity coefficient between the hot fluid and the hot end of the thermoelectric modules is 85W/(m & lt/(m & gt)²K) The average power generation per thermoelectric module was 3.04W, and the total power generation was 291.8W.

The hexagonal outer tube 2.1 thermoelectric power generation device adopting the hollow inner tube 2.2 and the guide fins 2.3 has the average temperature of hot fluid in a flow channel of 623K, the average temperature of cooling water of 324K and the average heat conductivity coefficient between the hot fluid and the hot end of the thermoelectric module of 180W/(m)²K) The average power generation per thermoelectric module was 4.9W, and the total power generation was 470.4W. The heat transfer performance between the heat energy in the automobile exhaust and the hot end of the thermoelectric module 3 is effectively enhanced, the power generation performance of the thermoelectric power generation device is improved, and the generated energy is improved by 61.2%.

The front, the back, the left, the right, the upper and the lower are all based on figure 1 in the attached drawings of the specification, according to the standard of the observation angle of a person, the side of the device facing an observer is defined as the front, the left side of the observer is defined as the left, and the like.

In the description of the present invention, it is to be understood that the terms "central", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be considered as limiting the scope of the invention.

The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (10)

1. The utility model provides an automobile exhaust waste heat power generation device of reinforcing heat transfer, sets up on exhaust duct (1) of car, its characterized in that: the heat exchange device comprises a heat exchange assembly (2), a thermoelectric module (3) and a cold exchange assembly (4), wherein the heat exchange assembly (2) is arranged on an exhaust pipeline (1), the thermoelectric module (3) is arranged on the heat exchange assembly (2), and the cold exchange assembly (4) is arranged on the thermoelectric module (3);

the heat exchange assembly (2) comprises an outer pipe body (2.1), the outer pipe body (2.1) is connected with the exhaust pipeline (1) in a sealing mode, and the thermoelectric module (3) is arranged on the outer side of the outer pipe body (2.1);

the cold exchange assembly (4) comprises a cooling box (4.1), and the thermoelectric module (3) is arranged between the outer pipe body (2.1) and the cooling box (4.1);

and the power output end of the thermoelectric module (3) is communicated with an automobile storage battery.

2. The automobile exhaust waste heat power generation device capable of enhancing heat transfer as claimed in claim 1, characterized in that: the heat exchange assembly (2) further comprises an inner pipe body (2.2), guide fins (2.3) are arranged between the inner pipe body (2.2) and the outer pipe body (2.1), the guide fins (2.3) are uniformly arranged along the radial direction of the inner pipe body (2.2), and two ends of each guide fin (2.3) are fixedly connected with the inner pipe body (2.2) and the outer pipe body (2.1) respectively.

3. The automobile exhaust waste heat power generation device capable of enhancing heat transfer according to claim 2, characterized in that: the heat exchange assembly (2) further comprises a reducing pipe (2.4), and the reducing pipe (2.4) is connected with the outer pipe body (2.1) and the exhaust pipeline (1) in a sealing mode.

4. The automobile exhaust waste heat power generation device capable of enhancing heat transfer according to claim 3, characterized in that: cold exchange assembly (4) still include feed liquor pipe (4.2) and drain pipe (4.3), feed liquor pipe (4.2) and drain pipe (4.3) set up on cooler bin (4.1) with cooler bin (4.1) inside intercommunication, feed liquor pipe (4.2) and drain pipe (4.3) and automobile engine cooling water tank intercommunication form cooling cycle.

5. The automobile exhaust waste heat power generation device capable of enhancing heat transfer according to claim 4, characterized in that: one end of the inner pipe body (2.2) is provided with a flow guide ring (2.5), and the flow guide ring (2.5) is arranged at the air inlet end of the heat exchange assembly (2).

6. The automobile exhaust waste heat power generation device capable of enhancing heat transfer according to claim 5, characterized in that: the outer tube body (2.1) is provided with a plane, and the thermoelectric module (3) is arranged on the outer plane of the outer tube body (2.1).

7. The automobile exhaust waste heat power generation device capable of enhancing heat transfer according to claim 6, characterized in that: the outer tube body (2.1) is provided with a plurality of planes, the thermoelectric modules (3) are also provided with a plurality of planes, and the thermoelectric modules (3) are respectively arranged on the outer planes of the outer tube body (2.1).

8. The automobile exhaust waste heat power generation device for enhancing heat transfer of claim 7, wherein: the plurality of thermoelectric modules (3) are arranged on the outer plane of the outer pipe body (2.1) in groups, the thermoelectric modules (3) in each group are connected in series, and a plurality of groups of thermoelectric modules (3) are connected in parallel.

9. The automobile exhaust waste heat power generation device capable of enhancing heat transfer according to claim 8, characterized in that: the cooling box (4.1) is also provided with a plurality of cooling boxes (4.1), the cooling boxes (4.1) are respectively arranged on each outer plane of the outer pipe body (2.1), and the cooling box (4.1) is further sleeved with a hoop (4.4).

10. The automobile exhaust waste heat power generation device capable of enhancing heat transfer according to any one of claims 1 to 9, characterized in that: the flow direction of the cooling liquid in the cooling box (4.1) is opposite to the flow direction of the gas in the heat exchange assembly (2).

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