Network structure system of thermoelectric power generation intelligent pavement and preparation method of network structure system

Abstract

The invention discloses a network structure system of a thermoelectric power generation intelligent pavement and a preparation method thereof.The network structure system comprises a thermoelectric power generation layer and a current collection device, the thermoelectric power generation layer is formed by laying a power generation layer material, and the power generation layer material comprises asphalt, steel fibers, bismuth telluride powder and a modifier; the current collection device is embedded in one corner of the top end or the bottom end of the thermoelectric heating layer. The steel fiber is used as a heat conduction material, the bismuth telluride powder is used as a conductive material, the thermoelectric power generation layer of a network structure is prepared, a continuous heat conduction and electric conduction network structure is formed, the power generation efficiency of the thermoelectric material can be maximized, and weak current can be collected and conducted into a current collection device through the continuous heat conduction and electric conduction network structure; meanwhile, the three-dimensional connection characteristic of the network structure can provide better structural stability for the pavement, the problems of layering, breakage and the like are not prone to occurring, and the network structure can be widely applied to the technical field of pavement materials.

Description

Technical Field

[0001] The present invention relates to the field of pavement materials, and in particular to a network structure system of a temperature difference power generation intelligent pavement and a preparation method thereof. Background Art

[0002] Summers are hot in some parts of the world, and high temperatures can easily cause asphalt pavements to age and crack, and the heat absorption characteristics of asphalt pavements can also aggravate the urban heat island effect. In previous technologies, existing thermoelectric power generation modules were used to absorb the summer pavement temperature to generate electricity, thereby reducing the pavement temperature and alleviating the urban heat island effect. However, due to the size of the thermoelectric power generation module and the power generation efficiency of the material, its overall power generation efficiency is not high, and the thermoelectric power generation module is only mechanically combined with the pavement material, which affects the aesthetic performance of the traffic and destroys the durability and stability of the pavement. Summary of the invention

[0003] In order to solve the above technical problems, the purpose of the present invention is to provide a network structure system of a temperature difference power generation intelligent pavement with higher structural stability and power generation efficiency and a preparation method thereof.

[0004] To achieve the above-mentioned purpose, one aspect of an embodiment of the present application proposes a network structure system of a temperature difference power generation intelligent pavement, including a thermoelectric power generation layer and a collector, wherein the thermoelectric power generation layer is paved with a power generation layer material, and the power generation layer material includes asphalt, steel fiber, bismuth telluride powder and a modifier, and the collector is embedded in a corner of the top or bottom end of the thermoelectric heating layer.

[0005] In some embodiments, the current collecting device includes a first electrode output port and a second electrode output port, wherein the first electrode output port is embedded in a top or bottom corner of the thermoelectric heating layer, and the second electrode output port is embedded in a bottom or top corner of the thermoelectric heating layer.

[0006] In some embodiments, the amount of the steel fiber is 2% by volume of the power generation layer material.

[0007] In some embodiments, the amount of the bismuth telluride powder is 10% by volume of the power generation layer material.

[0008] In some embodiments, the amount of the modifier is 3% by mass of the asphalt.

[0009] In some embodiments, the modifier is a styrene-butadiene-styrene block copolymer.

[0010] To achieve the above-mentioned purpose, another aspect of the embodiment of the present application provides a method for preparing a network structure system of a temperature difference power generation intelligent road surface, comprising the following steps:

[0011] Steel fiber, bismuth telluride powder and a modifier are added to asphalt and mixed and stirred by a high-temperature mixing process to obtain a power generation layer material;

[0012] Laying the power generation layer material on the bamboo fiber concrete cooling base layer to obtain a thermoelectric power generation layer;

[0013] The collector is embedded in a corner of the top or bottom of the thermoelectric power generation layer to obtain a network structure system of the temperature difference power generation intelligent road surface.

[0014] In some embodiments, the step of adding steel fiber, bismuth telluride powder and a modifier to asphalt and mixing and stirring to obtain a power generation layer material comprises:

[0015] Heating the asphalt to a preset softening temperature to obtain the asphalt in a flowing state;

[0016] The asphalt in a flowing state is transferred to an asphalt mixer, and then the modifier is gradually added to the asphalt in a flowing state according to a preset adding speed for mixing and stirring to obtain an asphalt mixture;

[0017] The bismuth telluride powder is gradually added into the asphalt mixture by a metering device for mixing and stirring to obtain an asphalt-bismuth telluride mixture;

[0018] The steel fibers are sheared according to a preset length, the sheared steel fibers are added to the asphalt-bismuth telluride mixture, and stirred by a stirrer to obtain the power generation layer material.

[0019] In some embodiments, the softening temperature is 160-180°C.

[0020] In some embodiments, the preset length is 20 to 60 mm.

[0021] The beneficial effects of the present invention are as follows: a network structure system of a temperature difference power generation intelligent pavement of the present invention and a preparation method thereof, comprising a thermoelectric power generation layer and a collector, wherein the thermoelectric power generation layer is paved with a power generation layer material, wherein the power generation layer material comprises asphalt, steel fiber, bismuth telluride powder and a modifier, and the collector is embedded in a corner of the top or bottom of the thermoelectric heating layer. The present invention uses steel fiber as a thermal conductive material and bismuth telluride powder as a conductive material to prepare a thermoelectric power generation layer with a network structure, forming a continuous thermal conductive and conductive network structure, which can not only maximize the power generation efficiency of the thermoelectric material, but also collect and conduct weak currents to the collector through a continuous thermal conductive and conductive network structure; at the same time, the three-dimensional connection characteristics of the network structure can provide better structural stability for the pavement, and is not prone to problems such as delamination and fracture. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solution in the embodiments of the present invention, the following introduction is made to the drawings required for use in the embodiments of the present invention. It should be understood that the drawings introduced below are only for the convenience of clearly describing some embodiments of the technical solution of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0023] Figure 1 A schematic diagram of a network structure system of a temperature difference power generation intelligent road surface provided by an embodiment of the present invention;

[0024] Figure 2 A flowchart of the steps of a method for preparing a network structure system of a temperature difference power generation intelligent pavement provided in an embodiment of the present invention.

[0025] Figure numerals: 01, thermoelectric power generation layer; 02, bamboo fiber concrete cooling base layer; 03, soil base; 101, current collecting device. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solutions and advantages of the present application clearer, the present application is further described in detail below in conjunction with the accompanying drawings and examples. It should be understood that the specific embodiments described herein are only used to explain the present application and are not intended to limit the present application. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the embodiments of the present application. They are only examples of devices and methods consistent with some aspects of the embodiments of the present application as detailed in the attached claims.

[0027] It is understood that the terms "first", "second", etc. used in this application can be used to describe various concepts in this article, but unless otherwise specified, these concepts are not limited by these terms. These terms are only used to distinguish one concept from another concept. For example, without departing from the scope of the embodiment of the present application, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Depending on the context, the words "if" and "if" as used herein can be interpreted as "at the time of" or "when" or "in response to determination".

[0028] The terms "at least one", "multiple", "each", "any", etc. used in this application, at least one includes one, two or more, multiple includes two or more, each refers to each of the corresponding multiple, and any refers to any one of the multiple.

[0029] Summers are hot in some parts of the world, and high temperatures can easily cause asphalt pavements to age and crack, and the heat absorption characteristics of asphalt pavements can also aggravate the urban heat island effect. In previous technologies, existing thermoelectric power generation modules were used to absorb the summer pavement temperature to generate electricity, thereby reducing the pavement temperature and alleviating the urban heat island effect. However, due to the size of the thermoelectric power generation module and the power generation efficiency of the material, its overall power generation efficiency is not high, and the thermoelectric power generation module is only mechanically combined with the pavement material, which affects the aesthetic performance of the traffic and destroys the durability and stability of the pavement.

[0030] To this end, an embodiment of the present invention proposes a network structure system of a temperature difference power generation intelligent road surface, including a thermoelectric power generation layer and a collector, wherein the thermoelectric power generation layer is paved with a power generation layer material, the power generation layer material includes asphalt, steel fiber, bismuth telluride powder and a modifier, and the collector is embedded in the thermoelectric heating layer. The present invention uses steel fiber as a thermal conductive material and bismuth telluride powder as a conductive material to prepare a thermoelectric power generation layer with a network structure, forming a continuous thermal conductive and conductive network structure, which can not only maximize the power generation efficiency of the thermoelectric material, but also collect and conduct weak currents to the collector through a continuous thermal conductive and conductive network structure; at the same time, the three-dimensional connection characteristics of the network structure can provide better structural stability for the road surface, and it is not easy to have problems such as delamination and fracture.

[0031] Reference Figure 1 , Figure 1 A schematic diagram of the structure of a network structure system of a thermoelectric power generation intelligent pavement provided in an embodiment of the present invention. An embodiment of the present invention proposes a network structure system of a thermoelectric power generation intelligent pavement, including a thermoelectric power generation layer 01 and a collector 101. The thermoelectric power generation layer 01 is paved with power generation layer materials, and the power generation layer materials include asphalt, steel fiber, bismuth telluride powder and a modifier. The collector 101 is embedded in a corner of the top or bottom of the thermoelectric heating layer.

[0032] As a further optional embodiment, the current collecting device 101 includes a first electrode output port and a second electrode output port, the first electrode output port is embedded in a top or bottom corner of the thermoelectric heating layer, and the second electrode output port is embedded in a bottom or top corner of the thermoelectric heating layer.

[0033] As a further optional embodiment, the amount of steel fiber used is 2% of the volume of the power generation layer material.

[0034] As a further optional implementation, the amount of bismuth telluride powder used is 10% of the volume of the power generation layer material.

[0035] As a further optional embodiment, the amount of the modifier used is 3% of the mass of the asphalt.

[0036] Specifically, the network structure system of the embodiment of the present invention is laid on the road surface, which is composed of a thermoelectric power generation layer 01, a bamboo fiber concrete cooling base layer 02 and a soil base 03 from top to bottom. The bamboo fiber concrete cooling base layer 02 is paved with cooling base materials, and the thermoelectric power generation layer 01 is paved with power generation layer materials.

[0037] Among them, the power generation layer material uses a reinforcing material with excellent electrical and thermal conductivity. Bismuth telluride has a good thermoelectric quality coefficient. It can use the temperature difference effect to convert thermal energy into electrical energy. Therefore, the embodiment of the present invention uses bismuth telluride powder as a conductive material, and the amount of bismuth telluride powder is 10% of the volume of the power generation layer material; steel fiber, as a metal fiber, has an extremely high thermal conductivity. It can quickly conduct heat from one area to another. Therefore, the embodiment of the present invention uses steel fiber as a thermal conductive material, and the amount of steel fiber is 2% of the volume of the power generation layer material. These materials can not only provide a charge conduction path, but also improve the overall thermal conduction efficiency. At the same time, a modifier is added to enhance the cross-linking of the thermoelectric power generation layer 01, and its amount is 3% of the mass of the asphalt.

[0038] Inside the thermoelectric power generation layer 01 of the network structure, the conductive material bismuth telluride powder and the thermoelectric material steel fiber are interwoven to form a three-dimensional channel, allowing charge and heat to be freely conducted throughout the road surface, and the channel can be formed by nanomaterials or micron-sized particles to ensure that the road surface maintains integrity when it is under pressure (such as vehicle driving). The network structure contains multiple nodes, each of which is a small power generation unit composed of thermoelectric materials. These nodes are interconnected by a conductive network to ensure that electrical energy can be transmitted from each power generation point to the collector 101. The first electrode output port and the second electrode output port of the collector 101 can be set at the upper right corner, lower right corner, upper left corner or lower left corner of the thermoelectric power generation layer 01, and output to the power storage device through wire connection for lighting and other needs of the traffic road system.

[0039] It should be noted that the network-structured thermoelectric generation layer 01 designed in the embodiment of the present invention ensures that when the thermoelectric material generates electricity, the charge can be quickly and low-lossly conducted to the first electrode output port and the second electrode output port through a series of conductive paths. This continuous conductive channel enables a large number of thermoelectric units dispersed in the asphalt to jointly generate electricity rather than working in isolation; on the other hand, the thermal conductivity of the thermal conductive material itself in the thermoelectric generation layer 01 effectively transfers heat between different layers, making the temperature difference between the upper and lower layers more uniform and significant, thereby enhancing the thermoelectric effect.

[0040] As a further optional embodiment, the modifier is a styrene-butadiene-styrene block copolymer.

[0041] Specifically, adding a modifier to asphalt can enhance its cross-linking ability and improve the thermoelectric properties of the material on the one hand; on the other hand, it can improve the flexibility and adhesion of the asphalt, while forming a cross-linking network around the microstructure of the steel fiber and bismuth telluride powder to enhance the overall performance of the material. The modifier can be styrene-butadiene-styrene block copolymer, which is a multiphase thermoplastic elastomer that has the structure and properties of both rubber and resin modified asphalt.

[0042] The network structure system of the thermoelectric power generation intelligent road surface according to the embodiment of the present invention is described above. It can be recognized that compared with the thermoelectric power generation module in the prior art, the embodiment of the present invention has the following advantages:

[0043] 1. Using steel fiber as a thermal conductive material and bismuth telluride powder as a conductive material to prepare a thermoelectric power generation layer with a network structure, forming a continuous thermal and conductive network structure, which can not only maximize the power generation efficiency of the thermoelectric material, but also collect and conduct weak currents to the collector through the continuous thermal and conductive network structure;

[0044] Second, the bismuth telluride powder and steel fibers in the network structure are interwoven to form a three-dimensional channel, which can provide better structural stability for the road surface and is not prone to delamination, fracture and other problems;

[0045] 3. The bismuth telluride powder and steel fibers in the network structure support each other, which can prevent the thermoelectric particles from shifting or wearing out during long-term use, thereby extending the life of the road surface's power generation function;

[0046] Fourth, the network structure can be distributed on a large scale throughout the asphalt pavement, covering a large area and forming multiple power generation nodes, so that the entire road surface can participate in power generation, energy is dispersedly collected, and aggregated to the edge collection device.

[0047] Reference Figure 2 The embodiment of the present invention provides a method for preparing a network structure system of a temperature difference power generation intelligent road surface, comprising the following steps S101 to S103:

[0048] S101, adding steel fiber, bismuth telluride powder and a modifier into asphalt through a high-temperature mixing process, mixing and stirring to obtain a power generation layer material;

[0049] As an optional implementation, the step of adding steel fiber, bismuth telluride powder and modifier into asphalt and mixing and stirring to obtain a power generation layer material through a high temperature mixing process can be further divided into the following steps S1011 and S1014:

[0050] S1011, heating the asphalt to a preset softening temperature to obtain asphalt in a flowing state;

[0051] As a further optional embodiment, the softening temperature is 160-180°C.

[0052] Specifically, the asphalt is first heated to a softening temperature to achieve sufficient fluidity so as to be evenly mixed with the modifier, steel fiber and bismuth telluride powder. During the asphalt heating process, the moisture in the asphalt is removed by a hot air drying device or a vacuum dehydration device to prevent bubbles from being generated or affecting the modification effect during subsequent processing.

[0053] S1012, transferring the asphalt in a flowing state to an asphalt mixer, and then gradually adding the modifier to the asphalt in a flowing state according to a preset adding speed for mixing and stirring to obtain an asphalt mixture;

[0054] Specifically, after the asphalt reaches a fluid state, the asphalt is transferred to an asphalt mixer and its temperature is maintained within the softening temperature range. Then, a metering pump or a screw feeder is used to gradually add the modifier to the asphalt at a preset addition rate. While the modifier is being added, the asphalt mixer is started for high-speed shear stirring to quickly disperse the modifier into the asphalt and obtain a uniform asphalt mixture.

[0055] Those skilled in the art will appreciate that the adding speed is a constant speed and can be determined according to the type of modifier, the viscosity of asphalt and the efficiency of the asphalt mixer.

[0056] S1013, gradually adding bismuth telluride powder into the asphalt mixture through a metering device for mixing and stirring to obtain an asphalt-bismuth telluride mixture;

[0057] Specifically, the bismuth telluride powder is gradually added to the asphalt mixture using a metering device, and while the bismuth telluride powder is added, the asphalt mixer is continued to stir until the bismuth telluride particles are evenly dispersed in the asphalt mixture to obtain an asphalt-bismuth telluride mixture. For example, the metering device may be an electronic scale, a screw feeder, or the like, but is not limited thereto.

[0058] S1014, shearing the steel fibers according to a preset length, adding the sheared steel fibers into the asphalt-bismuth telluride mixture, stirring the mixture with a stirrer, and obtaining a power generation layer material.

[0059] As a further optional implementation, the preset length is 20 to 60 mm.

[0060] Specifically, the steel fibers are first cut to a preset length to obtain short fibers of uniform length, thereby evenly dispersing the steel fibers into the asphalt to reduce fiber entanglement or agglomeration. Then, the cut steel fibers are gradually added to the heated asphalt-bismuth telluride mixture through a mechanical stirrer to obtain a power generation layer material for laying a thermoelectric power generation layer.

[0061] S102, laying a power generation layer material on top of a bamboo fiber concrete cooling base layer to obtain a thermoelectric power generation layer;

[0062] Furthermore, the bamboo fiber concrete cooling base is paved with cooling base materials. Bamboo fiber has the characteristics of high strength, high toughness and crack resistance, which can significantly improve the tensile strength and crack resistance of concrete, thereby improving the overall performance of concrete. Cement, fine sand and lightweight aggregate are selected to prepare concrete, and then bamboo fiber is added to the concrete and stirred until the bamboo fiber is evenly dispersed in the concrete to obtain a cooling base material, and then the cooling base material is paved on the road subgrade to obtain a bamboo fiber concrete cooling base.

[0063] S103, embedding the collector into a corner of the top or bottom of the thermoelectric power generation layer to obtain a network structure system of the temperature difference power generation intelligent road surface.

[0064] The contents of the above-mentioned network structure system embodiment of the temperature difference power generation intelligent pavement are all applicable to the preparation method embodiment of the network structure system of the present temperature difference power generation intelligent pavement. The functions specifically implemented by the preparation method embodiment of the network structure system of the present temperature difference power generation intelligent pavement are the same as those of the above-mentioned network structure system embodiment of the temperature difference power generation intelligent pavement, and the beneficial effects achieved are also the same as those achieved by the above-mentioned network structure system embodiment of the temperature difference power generation intelligent pavement.

[0065] In the above description of this specification, the description with reference to the terms "one embodiment / example", "another embodiment / example" or "certain embodiments / examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0066] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

[0067] The above is a specific description of the preferred implementation of the present invention, but the present invention is not limited to the embodiments. Those skilled in the art may make various equivalent modifications or substitutions without violating the spirit of the present invention. These equivalent modifications or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A network structure system of a temperature difference power generation intelligent road surface, characterized in that: It includes a thermoelectric power generation layer and a collector. The thermoelectric power generation layer is paved with power generation layer materials. The power generation layer materials include asphalt, steel fiber, bismuth telluride powder and modifier. The collector is embedded in a corner of the top or bottom of the thermoelectric heating layer.

2. The network structure system of the thermoelectric power generation intelligent road according to claim 1 is characterized in that: The current collecting device comprises a first electrode output port and a second electrode output port, wherein the first electrode output port is embedded in a corner of the top or bottom end of the thermoelectric heating layer, and the second electrode output port is embedded in a corner of the bottom or top end of the thermoelectric heating layer.

3. The network structure system of the thermoelectric power generation intelligent road surface according to claim 1 is characterized in that: The amount of the steel fiber is 2% of the volume of the power generation layer material.

4. The network structure system of the thermoelectric power generation intelligent road surface according to claim 1 is characterized in that: The amount of the bismuth telluride powder used is 10% of the volume of the power generation layer material.

5. The network structure system of the thermoelectric power generation intelligent road surface according to claim 1 is characterized in that: The amount of the modifier used is 3% of the mass of the asphalt.

6. The network structure system of the thermoelectric power generation intelligent road surface according to claim 1 is characterized in that: The modifier is a styrene-butadiene-styrene block copolymer.

7. The method for preparing a network structure system of a thermoelectric power generation intelligent pavement according to any one of claims 1 to 6, characterized in that: The following steps are involved: Steel fiber, bismuth telluride powder and a modifier are added to asphalt and mixed and stirred by a high-temperature mixing process to obtain a power generation layer material; Laying the power generation layer material on the bamboo fiber concrete cooling base layer to obtain a thermoelectric power generation layer; The collector is embedded in a corner of the top or bottom of the thermoelectric power generation layer to obtain a network structure system of the temperature difference power generation intelligent road surface.

8. The method for preparing a network structure system of a thermoelectric power generation intelligent pavement according to claim 7, characterized in that: The method of adding steel fiber, bismuth telluride powder and a modifier into asphalt and mixing and stirring to obtain a power generation layer material specifically includes: Heating the asphalt to a preset softening temperature to obtain the asphalt in a flowing state; The asphalt in a flowing state is transferred to an asphalt mixer, and then the modifier is gradually added to the asphalt in a flowing state according to a preset adding speed for mixing and stirring to obtain an asphalt mixture; The bismuth telluride powder is gradually added into the asphalt mixture by a metering device for mixing and stirring to obtain an asphalt-bismuth telluride mixture; The steel fibers are sheared according to a preset length, the sheared steel fibers are added to the asphalt-bismuth telluride mixture, and stirred by a stirrer to obtain the power generation layer material.

9. The method for preparing a network structure system of a thermoelectric power generation intelligent pavement according to claim 8, characterized in that: The softening temperature is 160-180°C.

10. The method for preparing a network structure system of a thermoelectric power generation intelligent pavement according to claim 8, characterized in that: The preset length is 20 to 60 mm.

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