CN112600463A - Heat collection power generation module with bulk phase structure - Google Patents
Heat collection power generation module with bulk phase structure Download PDFInfo
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- CN112600463A CN112600463A CN202011404735.2A CN202011404735A CN112600463A CN 112600463 A CN112600463 A CN 112600463A CN 202011404735 A CN202011404735 A CN 202011404735A CN 112600463 A CN112600463 A CN 112600463A
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Abstract
A heat collection power generation module with a bulk phase structure comprises an attachment layer, a bulk phase structured heat collection layer and a thermoelectric conversion layer from bottom to top in sequence; the bulk-structured heat collection layer comprises a heat dissipation base body connected with the bottom and an attachment layer, a heat collection structure is embedded in the heat dissipation base body and consists of a micro-nano structured material with a high heat conductivity coefficient and a material with a low heat conductivity coefficient, the heat collection structure is connected with a surface heat concentration area, and the surface heat concentration area is positioned above the heat dissipation base body; the thermoelectric conversion layer is composed of more than two stages of thermoelectric generation modules which are arranged up and down and have the same structure; connecting an external circuit with a flow deflector in a thermoelectric generation module to form current, connecting thermoelectric materials and the flow deflector in the same-stage thermoelectric generation module in a series connection mode, connecting different-stage thermoelectric generation modules in a parallel connection mode, and connecting the thermoelectric materials and the flow deflector into an electric power storage device through an external circuit; the invention improves the energy utilization efficiency and the heat dissipation efficiency, and is beneficial to the popularization and realization of heat recovery and reutilization.
Description
Technical Field
The invention relates to the technical field of heat conduction, thermoelectric generation and electric energy storage, in particular to a heat collection power generation module with a bulk phase structure.
Background
Heat widely exists in nature, electronic products, industrial production, power equipment and aerospace, and normal production and product performance can be influenced if the heat cannot be regulated and controlled. Meanwhile, in the process of energy consumption, most of generated heat is waste heat and waste heat, and although various measures are provided for recovering the heat at present, most of the heat belongs to low-grade heat sources and has the characteristics of low temperature, instability and the like, so that the heat is difficult to recycle, and the part of the heat is still very abundant in practice.
Aiming at the problem that heat is difficult to regulate and dissipate, various heat dissipation methods and heat recycling modes are applied to heating equipment, for example, a high-heat-conductivity heat dissipation sheet is manufactured by using materials with good heat conductivity such as metal and the like, so that heat is quickly conducted away; columnar, ribbed, radial radiators and the like can also be used, and the radiating structure is optimized by increasing the radiating area, so that heat is discharged. However, the general whole-surface heat dissipation cannot realize the regulation and control capability, that is, the heat dissipation cannot be effectively performed on uneven areas, and the heat dissipation fins cannot always achieve a good effect under the conditions of uneven heat generation of a heat source and the like.
Because the loss of heat exists widely in the working process of various equipment, so there is a large amount of energy waiting for recycling, if can't consume or recycle the heat of output, will make the heat gather, lead to local temperature rising to influence radiating efficiency, also can waste the energy simultaneously. At present, domestic methods for recycling heat by using a waste heat recycling technology are few, the efficiency is relatively low, the mainstream methods comprise a heat exchange technology, a heat-power conversion technology and a waste heat refrigerating and heating technology, and the methods are relatively high in cost, large in loss and relatively narrow in application space, and are not beneficial to popularization and implementation of heat recycling.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide a heat collection power generation module with a bulk phase structure, which can efficiently collect heat, convert the heat into other energy sources and quickly use the energy sources, greatly reduce the waste of energy, improve the energy utilization efficiency and the heat dissipation efficiency, and is beneficial to popularization and realization of heat recycling.
In order to achieve the purpose, the invention adopts the following technical scheme:
a heat collection power generation module with a bulk phase structure comprises an attachment layer 9, a bulk phase structured heat collection layer and a thermoelectric conversion layer from bottom to top in sequence;
the bulk phase structured heat collection layer comprises a heat dissipation base body 1, and the bottom of the heat dissipation base body 1 is connected with an attachment layer 9 and is attached to an external heat source; a heat collection structure is embedded in the heat dissipation base body 1, the heat collection structure is composed of a material 2 with high heat conductivity coefficient and a material 3 with low heat conductivity coefficient, which are micro-nano structured, the heat collection structure is connected with a surface heat concentration area 4, and the surface heat concentration area 4 is positioned above the heat dissipation base body 1;
the thermoelectric conversion layer is composed of more than two stages of thermoelectric generation modules which are arranged up and down and have the same structure; the first-stage thermoelectric power generation module comprises a first ceramic substrate 5, the first ceramic substrate 5 is connected above the heat dissipation base body 1, the first ceramic substrate 5 is connected with a first flow deflector 6, first thermoelectric materials 7 are arranged on the left side and the right side of the first flow deflector 6, and the two first thermoelectric materials 7 are connected with a second flow deflector 8.
The base material of the attaching layer 9 is flexible polymer, and the thickness is 0.5-2 mm.
The heat collection structure is a composite structure formed by alternately arranging high-thermal-conductivity-coefficient materials 2 and low-thermal-conductivity-coefficient materials 3, and the composite structure is an optimized structure following a thermal transformation theory; the local structure of the low-thermal-conductivity material 3 close to the heat dissipation substrate 1 is a triangular structure.
The heat conductivity coefficient of the high heat conductivity coefficient material 2 is 300W/mK-1000W/mK, and the heat conductivity coefficient of the low heat conductivity coefficient material 3 is 0.24W/mK-10W/mK.
The first thermoelectric material 7 is a thermoelectric material with a thermoelectric figure of merit of 0.9-1.4 at room temperature, and has a thickness of 8-12mm and a width of 7-9 mm.
The heat conductivity coefficient of the first ceramic substrate 5 is 2.5W/mK-10W/mK, and the thickness of the first ceramic substrate is 0.5mm-2 mm.
The first flow deflector 6 and the second flow deflector 8 are used for converting potential difference generated by the first thermoelectric material 7 into current, one end of the first thermoelectric material 7 close to the first flow deflector 6 is a hot end, one end of the first thermoelectric material 7 close to the second flow deflector 8 is a cold end, and the first thermoelectric material becomes a component of the energy storage circuit; the thickness of all the guide vanes is 0.5-2 mm.
An external circuit is connected with the flow deflectors in the thermoelectric generation modules to form current, the flow deflectors are connected in a Z shape, thermoelectric materials in the same-stage thermoelectric generation modules are connected with the flow deflectors in a series connection mode, the thermoelectric generation modules in different stages are connected in a parallel connection mode, and the thermoelectric generation modules are connected with the power storage device 16 through the external circuit 15.
The heat collection and power generation modules with the bulk phase structure are assembled into an array to form a large-scale heat collection and power generation device, the currents between the connected heat collection and power generation modules with the bulk phase structure are communicated to form a passage, the large-scale heat collection and power generation device is connected to the power storage device 16 through the external circuit 15, and the electric energy in the large-scale heat collection and power generation device is stored in the power storage device 16.
The heat regulation and control, the heat collection, the thermoelectric generation and the electric energy storage are integrated and packaged into a whole, the micro level of millimeter scale is achieved, and the electric power storage device 16 can be used quickly and conveniently only by connecting the electric equipment during use.
The invention has the beneficial effects that:
the heat source is arranged below the heat dissipation substrate 1, heat is transferred from the lower part and flows into the regions where the high-thermal-conductivity-coefficient materials 2 and the low-thermal-conductivity-coefficient materials 3 are alternately arranged, and the heat is collected in the surface heat concentration region 4, so that the flow direction of the temperature is controlled, the heat dissipation is accelerated, the heat is concentrated, and the heat dissipation is reduced.
After the temperature difference is increased, the thermoelectric conversion efficiency is improved, and in the long-term dynamic heat collection process, the whole structure continuously conducts heat for the thermoelectric material to continuously generate electric energy. On the premise of saving space, the two-stage temperature difference power generation module is adopted, and the power generation efficiency and the electric energy are improved by the two-stage temperature difference power generation module in the process of reducing the temperature in a stepped manner. The ceramic substrate isolates the flow deflector from the heat dissipation base body, so that the circuit is protected while heat is effectively conducted.
Drawings
FIG. 1 is a three-dimensional view of an embodiment of the present invention.
FIG. 2 is a three-dimensional schematic view of a bulk-structured heat collection layer according to an embodiment of the present invention.
FIG. 3 is a schematic diagram of a thermoelectric conversion layer primary thermoelectric generation module according to an embodiment of the invention.
Fig. 4 is an assembly view of a thermoelectric conversion layer according to an embodiment of the present invention, in which fig. (a) is a view of a two-stage thermoelectric power generation module after assembly, and fig. (b) is a right side view after assembly.
Fig. 5 is a schematic diagram of an access power storage device according to an embodiment of the present invention.
Detailed Description
The invention is described in detail below with reference to the figures and examples.
As shown in fig. 1 and 2, a heat collection power generation module with a bulk phase structure comprises an attachment layer 9, a bulk phase structured heat collection layer and a thermoelectric conversion layer in sequence from bottom to top;
the bulk phase structured heat collection layer comprises a heat dissipation base body 1, and the bottom of the heat dissipation base body 1 is connected with an attachment layer 9 and is attached to an external heat source; a heat collection structure is embedded in the heat dissipation base body 1, the heat collection structure is composed of a material 2 with high heat conductivity coefficient and a material 3 with low heat conductivity coefficient, which are micro-nano structured, the heat collection structure is connected with a surface heat concentration area 4, and the surface heat concentration area 4 is positioned above the heat dissipation base body 1;
the thermoelectric conversion layer consists of a primary thermoelectric generation module and a secondary thermoelectric generation module which are arranged up and down and have the same structure; the primary thermoelectric power generation module comprises a first ceramic substrate 5, the first ceramic substrate 5 is connected above the heat dissipation base body 1, the upper part of the first ceramic substrate 5 is connected with a first flow deflector 6, first thermoelectric materials 7 are arranged on the left side and the right side of the first flow deflector 6, and the upper parts of the two first thermoelectric materials 7 are connected with a second flow deflector 8; the secondary thermoelectric generation module comprises a second ceramic substrate 10, the second ceramic substrate 10 is connected above the second flow deflector 8, the second ceramic substrate 10 is connected with a third flow deflector 11, second thermoelectric materials 12 are arranged on the left side and the right side of the third flow deflector 11, the two second thermoelectric materials 12 are connected with a fourth flow deflector 13, and a third ceramic substrate 14 is connected above the fourth flow deflector 13.
The base material of the attaching layer 9 is flexible polymer, the thickness is 0.5-2mm, and the like, such as graphene composite materials.
The heat collection structure is a composite structure formed by alternately arranging high-thermal-conductivity-coefficient materials 2 and low-thermal-conductivity-coefficient materials 3, and the composite structure is an optimized structure following a thermal transformation theory; the local structure that low coefficient of thermal conductivity material 3 is close to heat dissipation base member 1 is the triangle-shaped structure, has reduced low coefficient of thermal conductivity material 3 and thermal area of contact, and has increased high coefficient of thermal conductivity material 2 and thermal area of contact, and the efficiency of this structure is most outstanding among the class structure, and according to the result that the experiment shows, alternate arrangement's figure increases the effect that can improve the heat and collect.
The heat conductivity coefficient of the high heat conductivity coefficient material 2 is 300W/mK-1000W/mK, and comprises a liquid metal heat conduction material and the like; the low-thermal-conductivity-coefficient material 3 has a thermal conductivity of 0.24W/mK-10W/mK and comprises PDMS, resin and other materials.
The first thermoelectric material 7 and the second thermoelectric material 12 are thermoelectric materials with thermoelectric figure of merit of 0.9-1.4 at room temperature, such as bismuth telluride, and have a thickness of 8-12mm and a width of 7-9 mm.
The heat conductivity coefficients of the first ceramic substrate 5, the second ceramic substrate 10 and the third ceramic substrate 14 are 2.5W/mK-10W/mK, and the thicknesses of the first ceramic substrate, the second ceramic substrate and the third ceramic substrate are 0.5mm-2 mm.
The first flow deflector 6 and the second flow deflector 8, and the third flow deflector 11 and the fourth flow deflector 13 are used for converting potential differences generated by the first thermoelectric material 7 and the second thermoelectric material 12 into currents, one end of the first thermoelectric material 7 close to the first flow deflector 6 is a hot end, and one end of the first thermoelectric material 7 close to the second flow deflector 8 is a cold end; one end of the second thermoelectric material 12 close to the third flow deflector 11 is a hot end, and one end of the second thermoelectric material 12 close to the fourth flow deflector 13 is a cold end, and becomes a component of the energy storage circuit; the thickness of all the guide vanes is 0.5-2 mm.
The working principle of the invention is as follows:
when the heat dissipation base body 1 contacts a heat source, heat enters the heat dissipation base body 1, when the heat flows into the areas where the high-thermal-conductivity-coefficient materials 2 and the low-thermal-conductivity-coefficient materials 3 are arranged alternately, the heat is conducted fast in the high-thermal-conductivity-coefficient materials 2 and is conducted slow in the low-thermal-conductivity-coefficient materials 3, therefore, the heat can be transmitted along the path of the high-thermal-conductivity-coefficient materials 2, the effect of regulating and controlling the heat conduction direction is achieved, the heat is concentrated to the surface heat concentration area 4, the temperature of the surface heat concentration area 4 is far higher than that of the area near the same plane, the surface heat concentration area 4 is separated from the first guide vane 6 through the first ceramic substrate 5, and the effects of electric insulation and heat transmission are.
The heat is transmitted into a first thermoelectric material 7 for the primary thermoelectric generation module through the first ceramic substrate 5, the heat is converted into electromotive force, the first flow deflector 6 and the second flow deflector 8 are used for connecting the first thermoelectric generation module and the second thermoelectric generation module, so that current can be formed, and the first thermoelectric generation module and an external electrical appliance or an energy storage module can be connected to use or collect electric energy.
Referring to fig. 3, 4 and 5, the flow deflectors of each bulk phase structured heat collection power generation module are connected in a zigzag manner and can be conducted, wherein the flow deflectors connecting two thermoelectric materials play a role of a bridge; in the same-stage thermoelectric power generation module, the flow deflectors and the thermoelectric materials are connected in series to form a branch of a circuit, and two (or more) thermoelectric power generation modules are assembled to form power generation equipment with a certain scale; as can be seen from the right view of the assembly schematic diagram, a certain gap is reserved for the thermoelectric generation module in the length direction, the gap is used for avoiding the problem of circuit contact disturbance when a plurality of thermoelectric generation modules are combined, and the gap width can be determined according to the actual situation; the primary temperature difference power generation module and the secondary temperature difference power generation module are connected in parallel to a trunk circuit of the power storage device 16 and connected in a mode that the whole system is connected with the external circuit 15, current flow directions of the heat collection power generation device are in the same direction when the heat collection power generation device works, and the trunk circuit current is completely injected into the power storage device 16, so that the power storage function can be realized.
The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and it is not intended that the invention be limited to these specific details. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.
Claims (10)
1. A heat collection power generation module with a bulk phase structure is characterized in that: the heat collecting layer is sequentially provided with an attaching layer (9), a bulk phase structured heat collecting layer and a thermoelectric conversion layer from bottom to top;
the bulk-structured heat collection layer comprises a heat dissipation base body (1), the bottom of the heat dissipation base body (1) is connected with an attachment layer (9) and is attached to an external heat source; a heat collection structure is embedded in the heat dissipation base body (1), the heat collection structure is composed of a micro-nano structured material (2) with a high heat conductivity coefficient and a material (3) with a low heat conductivity coefficient, the heat collection structure is connected with a surface heat concentration area (4), and the surface heat concentration area (4) is positioned above the heat dissipation base body (1);
the thermoelectric conversion layer is composed of more than two stages of thermoelectric generation modules which are arranged up and down and have the same structure; the first-level thermoelectric power generation module comprises a first ceramic substrate (5), the first ceramic substrate (5) is connected above the heat dissipation base body (1), the first ceramic substrate (5) is connected with a first flow deflector (6), first thermoelectric materials (7) are arranged on the left side and the right side of the first flow deflector (6), and the two first thermoelectric materials (7) are connected with a second flow deflector (8).
2. The bulk structured heat collection power generation module according to claim 1, wherein: the base material of the attaching layer (9) is flexible polymer, and the thickness is 0.5-2 mm.
3. The bulk structured heat collection power generation module according to claim 1, wherein: the heat collection structure is a composite structure formed by alternately arranging high-thermal-conductivity materials (2) and low-thermal-conductivity materials (3), and the composite structure is an optimized structure following a thermal transformation theory; the local structure of the low-thermal-conductivity material (3) close to the heat dissipation substrate (1) is a triangular structure.
4. The bulk structured heat collection power generation module according to claim 1, wherein: the heat conductivity coefficient of the high heat conductivity coefficient material (2) is 300W/mK-1000W/mK, and the heat conductivity coefficient of the low heat conductivity coefficient material (3) is 0.24W/mK-10W/mK.
5. The bulk structured heat collection power generation module according to claim 1, wherein: the first thermoelectric material (7) is a thermoelectric material with a thermoelectric figure of merit of 0.9-1.4 at room temperature, and has a thickness of 8-12mm and a width of 7-9 mm.
6. The bulk structured heat collection power generation module according to claim 1, wherein: the first ceramic substrate (5) has a thermal conductivity of 2.5W/mK-10W/mK and a thickness of 0.5mm-2 mm.
7. The bulk structured heat collection power generation module according to claim 1, wherein: the first flow deflector (6) and the second flow deflector (8) are used for converting the potential difference generated by the first thermoelectric material (7) into current and forming a component of the energy storage circuit; one end of the first thermoelectric material (7) close to the first flow deflector (6) is a hot end, and one end of the first thermoelectric material (7) close to the second flow deflector (8) is a cold end; the thickness of all the guide vanes is 0.5-2 mm.
8. The bulk structured heat collection power generation module according to claim 1, wherein: an external circuit is connected with the flow deflectors in the thermoelectric generation modules to form current, the flow deflectors are connected in a Z shape, thermoelectric materials in the same-stage thermoelectric generation modules are connected with the flow deflectors in a series connection mode, the thermoelectric generation modules in different stages are connected in a parallel connection mode, and the thermoelectric generation modules are connected into an electric storage device (16) through an external circuit (15).
9. The bulk structured heat collection power generation module according to claim 1, wherein: the heat collection and power generation modules with the bulk phase structure are assembled into an array to form a large-scale heat collection and power generation device, currents among the connected heat collection and power generation modules with the bulk phase structure are communicated to form a passage, the large-scale heat collection and power generation device is connected to an electric storage device (16) through an external circuit (15), and electric energy in the large-scale heat collection and power generation device is stored in the electric storage device (16).
10. The bulk structured heat collection power generation module according to claim 9, wherein: the heat regulation and control, the heat collection, the thermoelectric generation and the electric energy storage are integrated and packaged into a whole, and the micro level of millimeter scale is achieved.
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| CN1224534A (en) * | 1996-05-10 | 1999-07-28 | 特莱珀特国际股份有限公司 | Improved thermoelectric unit with electric input/output provision |
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