TWI617777B - Heat exchange device for radiant thermoelectric conversion - Google Patents

Abstract

A heat exchange device for radiant heat recovery power generation, the heat exchange device includes: a plurality of flat rectangular tubes, the plurality of flat rectangular tubes are arranged in parallel; a first trunk tube is located at one end of each of the plurality of flat rectangular tubes, There is a communication hole between the first main pipe and each of the plurality of flat square pipes. The first main pipe includes a water outlet; a second main pipe is located at the other end of each of the plurality of flat square pipes. There is a communication hole between the second main pipe and each of the plurality of flat square pipes. The second main pipe includes a water inlet; a plurality of thermoelectric chips are located on an outer pipe wall of each of the plurality of flat square pipes. An array is arranged between the plurality of thermoelectric chips; and at least one supporting frame is located on another outer tube wall opposite to the outer tube wall, and the at least one supporting frame is connected to each of the plurality of flat rectangular tubes.

Description

Heat exchange device for radiant heat recovery power generation

This case relates to a heat exchange device for radiant heat recovery power generation.

In industrial combustion equipment, the radiant waste heat generated is considered unrecyclable. At present, the five domestic industrial radiant waste heat are metal smelters, glass panel plants, cement plants, petrochemical plants, and paper mills. Because the process often operates at temperatures of hundreds of degrees Celsius, waste heat is mostly lost to the environment by means of heat radiation. However, there was no corresponding recovery mechanism in the past, so radiant heat is regarded as waste heat that cannot be recovered. For example, the continuous casting process of steel smelting is an upstream process of the steel industry, and the temperature reaches 1000 ° C. In the downstream hot rolling process of the steel industry, the temperature can still reach 500 ° C during coil heat treatment. In addition, in the cement, papermaking and other industries, the rotary kiln combustion system is often set in the process. Although the furnace body is covered with refractory material for insulation, the kiln body shell still has a temperature of 300 ° C.

The above-mentioned industrial processes all have a common characteristic, that is, the process is continuous, and the objects are continuously moved, and the waste heat recovery cannot be performed by the contact device, so the high-radiation waste heat that has not been recovered is released during the process. This type of plant is suitable for the development of non-contact radiant heat absorption technology for recycling The process site radiates heat, and the recovered heat can be converted into electricity for use with thermoelectric technology.

The present disclosure provides a heat exchange device for radiant heat recovery power generation. The heat exchange device includes: a plurality of flat rectangular tubes, the plurality of flat rectangular tubes are arranged in parallel; a first trunk tube located in each of the plurality of flat rectangular tubes; At one end, there is a communication hole between the first main pipe and each of the plurality of flat square pipes, the first main pipe includes a water outlet; a second main pipe is located at the other of each of the plurality of flat square pipes; At one end, there is a communication hole between the second main pipe and each of the plurality of flat square pipes. The second main pipe includes a water inlet; a plurality of thermoelectric chips are located in an outer pipe of each of the plurality of flat square pipes. On the wall, the plurality of thermoelectric chips are arranged in an array; and at least one support frame is located on another outer tube wall opposite to the outer tube wall, and the at least one support frame is connected to each of the plurality of flat rectangular tubes.

11‧‧‧ flat square tube

13‧‧‧ first trunk

14‧‧‧ second trunk

15‧‧‧end

16‧‧‧ communication hole

18‧‧‧ Outlet

19‧‧‧ side

20‧‧‧ communication hole

22‧‧‧ Inlet

23‧‧‧thermoelectric chip

24‧‧‧ hot noodles

25‧‧‧ Outer tube wall

26‧‧‧Support

27‧‧‧ first trunk

28‧‧‧Extended surface

30‧‧‧Flat square tube

31‧‧‧ outer tube wall

32‧‧‧ center

33‧‧‧ Outlet

35‧‧‧Flat square tube

36‧‧‧thermoelectric chip

37‧‧‧ first trunk

38‧‧‧Second Main Pipe

39‧‧‧ Outlet

40‧‧‧Inlet

41‧‧‧heat absorption plate

42‧‧‧ cold noodles

43‧‧‧ hot noodles

45‧‧‧ Outer frame

46‧‧‧bench

47‧‧‧Concentration Box

48‧‧‧Insulation board

49‧‧‧ inside wall

50‧‧‧screw

51‧‧‧heat absorption plate

52‧‧‧ fins

53‧‧‧Flat square tube

54‧‧‧thermoelectric chip

55‧‧‧first trunk

56‧‧‧Second Main Pipe

57‧‧‧outlet

58‧‧‧Inlet

59‧‧‧ Outer frame

60‧‧‧bench

61‧‧‧cable box

62‧‧‧Insulation board

63‧‧‧ cold noodles

64‧‧‧ hot noodles

65‧‧‧heat absorption plate

66‧‧‧Thermal chip

67‧‧‧Flat square tube

68‧‧‧ Outer frame

69‧‧‧Vacuum environment

70‧‧‧ hot noodles

71‧‧‧ cold noodles

72‧‧‧ thermal insulation coating

73‧‧‧ inner wall

74‧‧‧ thermal energy

75‧‧‧ thermal energy

80‧‧‧bearing

81‧‧‧Slide

82‧‧‧bench

83‧‧‧ angle

85‧‧‧ Outer frame

100‧‧‧ heat exchange device

200‧‧‧ heat exchange device

300‧‧‧Heat exchange device

400‧‧‧heat exchange device

500‧‧‧heat exchange device

600‧‧‧ heat exchange device

D _h ‧‧‧hydraulic diameter

h‧‧‧ Thermal Convection Coefficient

k‧‧‧ coefficient of thermal conductivity

L ₁ ‧‧‧ length

Nu _D ‧‧‧News Number

P‧‧‧ Cross-sectional area infiltration perimeter

R‧‧‧ radius of curvature

W‧‧‧Width

FIG. 1 is a schematic diagram illustrating a heat exchange device according to some embodiments.

Figure 2 is a side view illustrating a heat exchange device according to some embodiments.

Figure 3 is a side view illustrating a heat exchange device according to some embodiments.

Figure 4 is a side view illustrating a heat exchange device according to some embodiments.

Figure 5 is a cross-sectional view illustrating a heat exchange device according to some embodiments.

Fig. 6 is a schematic diagram illustrating a heat exchange device according to some embodiments.

This case proposes a heat exchange device for radiant heat recovery power generation. The heat exchange device uses a plurality of flat rectangular tubes arranged and combined to form an array flat rectangular tube structure. The geometry of the flat square tube, the flat square tube is in close contact with the thermoelectric chip and is combined. Thermal radiation is absorbed at the hot end of the thermoelectric chip, and thermal energy is taken away by the working fluid at the cold end of the thermoelectric chip, so that the cold and hot ends of the thermoelectric chip generate a temperature difference to generate electricity. The heat exchange device uses the pressure resistance and easy welding characteristics of the flat square pipe, and according to the capacity of the thermoelectric power generation system, the length of the pipe is extended vertically, and the number of pipes is increased in the transverse direction. At the same time, the horizontal support frame can strengthen the mechanical strength of the overall array of flat rectangular tube structures. This heat exchanging device is easy to mass-produce, easy to assemble, and has the characteristics of pressure resistance and corrosion resistance, and can be continuously operated in the industrial field for a long time.

FIG. 1 is a schematic diagram illustrating a heat exchange device 100 according to some embodiments. A heat exchange device 100 for radiant heat recovery and power generation. The heat exchange device 100 includes: a plurality of flat square tubes 11, the plurality of flat square tubes 11 are arranged in parallel; a first trunk tube 13, One end 15 has a communication hole 16 between the first main pipe 13 and each of the plurality of flat square pipes 11. The first main pipe 13 includes a water outlet 18; the second main pipe 14 is located in each of the plurality of flat square pipes 11. At the other end 19, there is a communication hole 20 between the second main pipe 14 and each of the plurality of flat square pipes 11, the second main pipe 14 includes a water inlet 22; a plurality of thermoelectric chips 23 are located in a plurality of flat squares On the outer tube wall 25 of the tube 11, a plurality of thermoelectric chips 23 are arranged in an array; and at least one support frame 26 is located on the other outer tube wall opposite to the outer tube wall 25. At least one support frame 26 is connected to each A plurality of flat square tubes 11.

Each rectangular tube 11 has an extended outer tube wall 25. The cut surface of each rectangular tube 11 is a rectangular or square wall surface. Each rectangular tube 11 itself is a flow channel, allowing working fluid or water to circulate inside. In one embodiment, each flat The material of the square tube 11 is stainless steel, and has characteristics such as corrosion resistance, heat resistance, and water pressure resistance. The material can also use other surface-treated steel or other materials, such as: galvanized steel, copper, aluminum alloy, but not limited to this.

Each thermoelectric chip 23 is formed by connecting a plurality of p-type and n-type semiconductors in series. When there is a temperature difference between the two ends of the thermoelectric chip 23, according to the theory of thermal equilibrium, the electron carriers in the n-type semiconductor and the hole carriers in the p-type semiconductor play the role of transferring heat, so a direct current is generated. The magnitude of the current is determined by the temperature difference between the high temperature surface and the low temperature surface. The larger the temperature difference is, the larger the current is. In one embodiment, each thermoelectric chip 23 includes a hot surface 24 and a cold surface (also referred to as a hot end and a cold end). The direction of the hot surface 24 is outward, and the cold surface is opposite to the hot surface 24, and the cold surface is flat. The tube 11 and the cold surface contacts the outer tube wall 25. In actual operation, the geometry of the rectangular tube 11 is in close contact with and combined with the thermoelectric chip 23. When heat radiation is absorbed on the hot surface 24 (or hot end) of the thermoelectric chip 23, the thermal energy is on the cold surface (or cold end). ) Is taken away by the working fluid in the rectangular tube 11 to form a temperature difference, thereby generating an electric current and generating electricity.

Each rectangular tube 11 communicates with the first trunk tube 13 through the communication hole 16. Each rectangular tube 11 communicates with the second trunk tube 14 through the communication hole 20. The first main pipe 13 is parallel to the second main pipe 14, and the first main pipe 13 or the second main pipe 14 is perpendicular to each flat square pipe 11. The working fluid or water is injected into the water inlet 22 of the second main pipe 14, and through the communication hole 20, the working fluid or water enters each of the flat rectangular pipes 11, and the first main pipe 13 collects the flow channels in each of the flat rectangular pipes 11. The water outlet 18 of the tube 13 discharges the working fluid or water from each of the rectangular tubes 11. In an embodiment, the water inlet 22 and the water outlet 18 will directly use cooling circulating water or pure process water at the industrial site. The cooling circulating water at the industrial site is mainly used for cooling large equipment, and the pipeline pressure can reach 10 kg / cm ² . In one embodiment, a pump can be added to the water inlet 22 to pressurize the working fluid or water, so that the pressure of the pipeline is increased to increase the flow rate.

In one embodiment, the at least one supporting frame 26 is parallel to the first main pipe 13 or the second main pipe 14. At least one supporting frame 26 supports each rectangular tube 11 and each rectangular tube 11 is welded to at least one supporting frame 26. The at least one supporting frame 26 may adopt the same structure but different dimensions as the rectangular tube 11 or be solid The steel 26 and the support frame 26 increase the overall mechanical strength of the heat exchange device 100. In one embodiment, the at least one supporting frame 26 is a rectangular parallelepiped, and each surface is a flat surface.

In one embodiment, each thermoelectric chip 23 has a size of 40 millimeters (mm) by 40 millimeters (mm) in width, and a rectangular tube 11 having an outer diameter of 10 millimeters by 50 millimeters (section size) can be selected. The length L ₁ of the thermoelectric chip 23 in this embodiment is 40 mm, and the width W of the rectangular tube 11 is 50 mm. The relationship between the width W of the rectangular tube 11 and the length L ₁ of the thermoelectric chip 23 is as follows: W = L ₁ + ( 0 ~ 0.5) × L ₁ In other words, the minimum width W of the rectangular tube 11 may be equal to the length L _{1 of the} thermoelectric chip 23. The maximum width W of the rectangular tube 11 is 1.5 times the length L _{1 of the} thermoelectric chip 23. The tube length extension and the number of tubes of the rectangular tube 11 are determined according to the overall heat exchange capacity and the number of thermoelectric chips 23, but not limited thereto. In one embodiment, the length L ₁ of the cold surface of each thermoelectric chip 23 is smaller than the width W of each rectangular tube 11.

FIG. 2 is a side view illustrating a heat exchange device 200 according to some embodiments. Illustration. In one embodiment, the first trunk pipe 27 includes an extended curved surface 28, a plurality of flat rectangular tubes 30 are located on the extended curved surface 28, and the plurality of flat rectangular tubes 30 are spatially arranged in a curved line. The first main pipe 27 has a water outlet 33. The extended curved surface 28 has a radius of curvature R such that the outer tube wall 31 of each rectangular tube 30 faces the center 32 of the extended curved surface 28. Correspondingly, the second main pipe (not shown) located on the other end of each rectangular tube 30 and at least one support bracket (not shown) located on the middle section of each rectangular tube 30 also include an extended curved surface. The extended curved surface is similar to the extended curved surface 28 and has a radius of curvature R. This embodiment is applicable to a heat source having a curved surface, such as a cement rotary kiln. The arrangement of curved surfaces can improve the heat collection effect.

FIG. 3 illustrates a side view of a heat exchange device 300 according to some embodiments. The heat exchange device 300 includes a plurality of flat rectangular tubes 35, a plurality of thermoelectric chips 36, a first main pipe 37, a second main pipe 38, a water outlet 39, and a water inlet 40. In one embodiment, the heat exchange device 300 further includes: a heat absorption plate 41, wherein a plurality of thermoelectric chips 36 are located between the heat absorption plate 41 and a plurality of flat rectangular tubes 35. Each thermoelectric chip 36 includes a cold surface 42 and a hot surface 43 (also referred to as a hot end and a cold end). The cold surface 42 is in contact with the rectangular tube 35 and the heat absorption plate 41 is in contact with the hot surface 43 of each thermoelectric chip 36.

In one embodiment, the heat exchange device 300 further includes: an outer frame 45, wherein the outer frame 45 houses a plurality of rectangular tubes 35, and the outer frame 45 and the heat absorption plate 41 are sealed with the plurality of rectangular tubes 35 and a plurality of thermoelectric chips. 36. The outer frame 45 has a stage 46, and the flat square pipe 35, the first main pipe 37, and the second main pipe 38 are fixed to the stage 46. The water outlet 39 and the water inlet 40 pass through the platform 46 and protrude from the outer frame 45. In one embodiment, the heat exchange device 300 is separately provided. A hub box 47 is included, and the hub box 47 is connected to a plurality of thermoelectric chips 36. The junction box 47 receives and collects electric energy generated by the thermoelectric chip 36. In one embodiment, the heat absorbing plate 41 is fixed to the stage 46 using screws 50.

In one embodiment, the heat exchanging device 300 further includes at least one heat insulation plate 48. The heat insulation plate 48 is located on an inner side wall 49 of the outer frame 45. The thermal insulation plate 48 is used to block the temperature transmission between the inside and the outside of the outer frame 45 and maintain the temperature difference between the cold surface 42 and the hot surface 43 (or hot end and cold end) of the thermoelectric chip 36. The thermal insulation plate 48 may be, for example, a rock wool thermal insulation plate.

FIG. 4 is a side view illustrating a heat exchange device 400 according to some embodiments. In one embodiment, the heat exchange device 400 is similar to the heat exchange device 300. The difference is that the heat absorbing plate 51 of the heat exchange device 400 has a plurality of fins 52. The fins 52 increase the surface area of the heat absorbing plate 51 to increase heat absorption. effectiveness. The plurality of thermoelectric chips 54 are located between the heat absorption plate 51 and the plurality of flat rectangular tubes 53. Each thermoelectric chip 54 includes a cold surface 63 and a hot surface 64. The cold surface 63 is in contact with the rectangular tube 53. The heat absorbing plate 51 is in contact with the hot surface 64 of each thermoelectric chip 54. The fins 52 stand on the other side of the heat absorbing plate 51.

In one embodiment, the heat exchange device 400 includes: a plurality of flat rectangular tubes 53, a plurality of thermoelectric chips 54, a first main tube 55, a second main tube 56, a water outlet 57, a water inlet 58, an outer frame 59, and a stage. The rack 60, the junction box 61, and the thermal insulation plate 62.

FIG. 5 is a cross-sectional view illustrating a heat exchange device 500 according to some embodiments. The heat exchange device 500 includes a heat absorption plate 65, a thermoelectric chip 66, a rectangular tube 67, and an outer frame 68. The outer frame 68 houses the thermoelectric chip 66 and the rectangular tube 67, and the heat absorption plate 65 and the outer frame 68 seal the thermoelectric chip 66 and the rectangular tube 67. The hot surface 70 (or called the hot end) of the thermoelectric chip 66 contacts the heat absorption plate 65, and the cold surface 71 (or called the cold end) of the thermoelectric chip 66 contacts the rectangular tube 67. In one embodiment, a vacuum environment 69 is provided between the outer frame 68 and the plurality of flat rectangular tubes 67. The vacuum environment 69 prevents the thermal energy sucked by the heat absorption plate 65 from escaping from the outer frame 68 by convection. In one embodiment, the heat exchanging device 500 further includes a heat insulation coating 72, which is located on the inner wall 73 of the outer frame 68. The thermal insulation coating 72 is located between the rectangular tube 67 and the thermoelectric chip 66. The thermal insulation coating 72 blocks the cold energy of the rectangular tube 67 from being dissipated out of the outer frame 68 by conduction. In one embodiment, the thermal insulation coating 72 is not in contact with the rectangular tube 67, and the vacuum environment 69 extends between the thermal insulation coating 72 and the rectangular tube 67.

In actual operation, the heat energy 74 is absorbed by the heat absorption plate 65, and the heat energy 74 enters the hot surface 70 of the thermoelectric chip 66. The heat energy 75 located on the cold surface 71 of the thermoelectric chip 66 enters the rectangular tube 67, and the working fluid in the rectangular tube 67 continues Ground heat takes away the thermal energy 75, so that the thermoelectric chip 66 forms a temperature difference between the hot surface 70 and the cold surface 71, and the temperature difference generates a temperature difference to generate electricity. The heat exchanging device 500 provides a closed environment and achieves an adiabatic environment through a vacuum environment 69 or still air. After the heat absorbing plate 65 captures the heat energy of the waste heat source, the heat absorbing plate 65 itself performs heat transfer. In addition to the main heat conduction to the thermoelectric chip 66, the remaining heat energy is also transferred to the flat tube 67 through heat convection or heat radiation. However, a large adiabatic space (vacuum environment 69 or stagnant air) can reduce the heat absorbed by the rectangular tube 67 from heat convection, heat conduction, and thermal radiation, which can reduce the heat burden of the rectangular tube 67 and improve the rectangular tube. The heat exchange capability of 67 (cold end or cold surface 71) reduces the temperature of the cold surface 71 of the thermoelectric chip 66, thereby increasing the power generation of the heat exchange device 500.

FIG. 6 is a schematic diagram illustrating a heat exchange device 600 according to some embodiments. In one embodiment, the structure of the heat exchange device 600 is similar to the aforementioned heat exchange device 100, 200, 300, 400, or 500. The heat exchange device 600 also includes a thermoelectric chip and a rectangular tube. In one embodiment, the heat exchange device 600 further includes at least one bearing 80, and the bearing 80 is connected to the outer frame 85 of the heat exchange device 600; and the slide rail 81 is coupled to the at least one bearing 80. The slide rail 81 is fixed on the platform 82. The slide rail 81 and the bearing 80 allow the heat exchange device 600 to move, thereby adjusting the distance between the heat exchange device 600 body and the heat source. An angle 83 is included between the body of the heat exchange device 600 and the horizontal plane, and the angle 83 may be, for example, an angle of 45 degrees. By changing the angle 83 and the moving bearing 80, the optimal distance or uniform temperature position allowed by the industrial site is obtained.

To further compare the convective heat transfer efficiency of flat and round tubes, you can analyze dimensionless Nusselt number (NuD), which is a dimensionless variable commonly used in convective heat transfer, that is, to further compare the flow The heat transfer at the interface between a fluid and its surrounding solid, which is defined as Where h is unit time and thermal convection coefficient at the unit solid interface; k is the thermal conductivity coefficient of the fluid; D _h is the hydraulic diameter (Hydraulic diameter) which is defined as Where A is the cross-sectional area through which the fluid passes; P is the infiltration perimeter of the cross-sectional area.

The dimensions of the flat rectangular tube manufactured in an embodiment of the present case are 5 cm in length, 1 cm in height, and a wall thickness of 0.15 cm. The cross-sectional area of the flow channel of this flat square tube is 3.29 cm ² (cm ² ), which equals the inner diameter of the round tube of the same cross-sectional area to 2.05 cm. Diameter 1.9 cm). In the power calculation of this embodiment, the thermal convection coefficient h of the three tube types is compared. The calculation results are shown in Table 1. The Nuss number Nu _D can be referred to the heat transfer data. From the comparison results, it can be known that the rectangular tube has a higher convective heat transfer efficiency. At the same time, further calculation and verification can confirm that the rectangular tube has the same convection cross-sectional area A. The thermal convection coefficient of the rectangular tube (315W / m ² K) higher than the thermal convection coefficient of the round pipe (equal cross-sectional area of round pipe 131 W / m ² K, six-way round pipe 140 W / m ² K). Therefore, in this embodiment, a rectangular tube is used as the heat dissipation end (cold surface or cold end) of the thermoelectric chip, which not only provides better fit under geometric conditions, but also provides superior thermal convection performance.

Case-based heat exchange means can be applied to the industrial field of radiant heat from the surface of the cement kiln low temperature (300 deg.] C) to a high temperature cast steel (1000 deg.] C), many industrial thermal radiation intensity up to ² ~ 20kW / m 2, higher than the sun At noon, the maximum intensity is 1kW / m ² , and many industrial processes are operated around the clock, regardless of the weather. Based on the amount of radiation that can be obtained per unit area throughout the year, the radiant heat that can be recovered is of great benefit.

This case proposes a heat exchange device for radiant heat recovery power generation. The heat exchange device uses a plurality of flat square tubes to form an array flat square tube structure. Through the geometry of the flat square tubes, there is a close contact with the thermoelectric chip and a junction, which is used to reduce Thermal resistance of thermoelectric chip and flat tube. The heat exchange device utilizes the pressure resistance and easy welding characteristics of the flat square pipe. The length of the straight pipe and the number of transverse pipes can be based on the capacity of the thermoelectric power generation system. The length of the pipe is increased and the number of pipes is increased. Runner. Furthermore, in addition to the pressure-resistance characteristics of the rectangular tube flow channel itself, the lateral support frame can also strengthen the mechanical strength of the heat exchange device. The cost of the heat exchange device is very low compared to the heat exchanger of steel casting, and it does not need to be re-molded. The rectangular tube of the heat exchange device has the characteristics of easy assembly and processing. The heat exchange device has pressure resistance characteristics, which allows to increase the working fluid flow rate and slow down the scaling mechanism in the rectangular tube. The rectangular tube has anti-corrosion characteristics and can be continuously operated in the industrial field for a long time. Claim.

Although the present invention has been disclosed as above with the examples, it is not intended to limit the present invention. Any person with ordinary knowledge in the technical field can make some modifications and retouching without departing from the spirit and scope of the present invention. The protection scope of the present invention shall be determined by the scope of the attached patent application.

11‧‧‧ flat square tube

13‧‧‧ first trunk

14‧‧‧ second trunk

15‧‧‧end

16‧‧‧ communication hole

18‧‧‧ Outlet

19‧‧‧ side

20‧‧‧ communication hole

22‧‧‧ Inlet

23‧‧‧thermoelectric chip

24‧‧‧ hot noodles

25‧‧‧ Outer tube wall

26‧‧‧Support

100‧‧‧ heat exchange device

L ₁ ‧‧‧ length

W‧‧‧Width

Claims (15)

A heat exchange device for radiant heat recovery power generation, the heat exchange device includes: a plurality of flat rectangular tubes, the plurality of flat rectangular tubes are arranged in parallel; a first trunk tube is located at one end of each of the plurality of flat rectangular tubes, There is a communication hole between the first main pipe and each of the plurality of flat square pipes. The first main pipe includes a water outlet; a second main pipe is located at the other end of each of the plurality of flat square pipes. There is a communication hole between the second main pipe and each of the plurality of flat square pipes. The second main pipe includes a water inlet; a plurality of thermoelectric chips are located on an outer pipe wall of each of the plurality of flat square pipes. The plurality of thermoelectric wafers are arranged in an array; a heat absorption plate, wherein the plurality of thermoelectric wafers are located between the heat absorption plate and the plurality of flat rectangular tubes, and the heat absorption plates are in contact with one of the plurality of thermoelectric chips And at least one support frame located on another outer tube wall opposite to the outer tube wall, the at least one support frame connected to each of the plurality of flat rectangular tubes. A heat exchange device for radiant heat recovery power generation, the heat exchange device includes: a plurality of flat rectangular tubes, the plurality of flat rectangular tubes are arranged in parallel; a first trunk tube is located at one end of each of the plurality of flat rectangular tubes, There is a communication hole between the first main pipe and each of the plurality of flat square pipes, the first main pipe includes a water outlet, wherein the first main pipe includes an extended curved surface, and the plurality of flat square pipes are located at The plurality of flat surfaces on the extended surface The square pipe has a curved surface arrangement in space; a second trunk pipe is located at the other end of each of the plurality of flat square pipes, and a communication hole is provided between the second trunk pipe and each of the plurality of flat square pipes, The second main pipe includes a water inlet; a plurality of thermoelectric chips are located on an outer tube wall of each of the plurality of flat rectangular tubes, and an array is arranged between the plurality of thermoelectric chips; On the other outer pipe wall of the outer pipe wall, the at least one supporting frame is connected to each of the plurality of flat rectangular pipes. The heat exchange device according to item 1 or 2 of the scope of patent application, wherein each of the plurality of thermoelectric chips includes a cold surface, and the cold surface is in contact with the plurality of flat rectangular tubes. The heat exchange device according to item 3 of the scope of patent application, wherein a length of one of the cold surfaces is smaller than a width of each of the plurality of flat tubes. According to the heat exchange device described in item 2 of the patent application scope, the heat exchange device further includes a heat absorption plate, wherein the plurality of thermoelectric chips are located between the heat absorption plate and the plurality of flat rectangular tubes. The heat exchanging device according to item 5 of the scope of patent application, wherein the heat absorption plate is in contact with a hot surface of each of the plurality of thermoelectric chips. The heat exchanging device according to item 1 or 5 of the patent application scope, wherein the heat absorption plate further comprises a plurality of fins. According to the heat exchange device described in item 1 or 2 of the scope of patent application, the heat exchange device further includes: an outer frame, wherein the outer frame houses the plurality of flat rectangular tubes, the The outer frame and a heat absorption plate seal the plurality of flat rectangular tubes and the plurality of thermoelectric chips. The heat exchange device according to item 8 of the scope of patent application, wherein a vacuum environment is provided between the outer frame and the plurality of flat rectangular tubes. According to the heat exchange device described in item 8 of the scope of patent application, the heat exchange device further includes: a thermal insulation coating located on an inner wall of the outer frame. According to the heat exchange device described in item 8 of the patent application scope, the heat exchange device further includes: at least one bearing connected to the outer frame; and a slide rail coupled to the at least one bearing. According to the heat exchange device described in item 8 of the scope of patent application, the heat exchange device further includes: at least one thermal insulation board located on an inner side wall of the outer frame. According to the heat exchange device described in item 1 or 2 of the scope of patent application, the heat exchange device further includes: a junction box connected to the plurality of thermoelectric chips. The heat exchange device according to item 1 or 2 of the scope of patent application, wherein the first main pipe collects the flow channels of the plurality of flat rectangular tubes, and the second main pipe splits the flow of each of the plurality of flat rectangular tubes. Road. The heat exchange device according to item 1 or 2 of the scope of patent application, wherein the first main pipe and the second main pipe are parallel, and the first main pipe or the second main pipe and each of the plurality of flat square pipes Rendered vertically.