CN204830521U - Thermoelectric integrated solar high-temperature heat collector based on Fresnel transmission - Google Patents

Abstract

The utility model discloses a solar high temperature collector with thermoelectric integration based on Fresnel transmission, comprising a collector body, wherein the collector body comprises a vacuum tube and a Fresnel transmission type focusing part, wherein the Fresnel transmission type focusing part is arranged on the upper part of the vacuum tube, wherein the center line of the Fresnel transmission type focusing part faces the sunlight, and the vacuum tube is arranged at the focusing point of the Fresnel transmission type focusing part. The utility model discloses a solar high temperature collector with thermoelectric integration based on Fresnel transmission, (1) the structure of the previous heat collection device in front of the concentrator is changed, and there is no need to worry about the problem that the heat collection device blocks the sunlight of the concentrator and thus reduces the efficiency; (2) the Fresnel lens focusing principle is adopted, and the heat collection device can more easily obtain high temperature; (3) the heat absorption sheet and the thin film solar cell can work together, and can generate electricity while collecting heat, thereby greatly improving the utilization rate of solar energy. (4) there is no need to track sunlight, and solar energy can be efficiently utilized.

Description

High temperature solar collector based on thermoelectric integration based on Fresnel transmission

technical field

The utility model relates to a high-temperature solar heat collector, in particular to a high-temperature solar heat collector based on thermoelectric integration based on Fresnel transmission.

Background technique

Among the medium and high temperature concentrating collectors popularized and used at present, there are mainly rotating parabolic concentrators and trough parabolic mirror concentrators. The former can obtain high temperature, but two-dimensional tracking is required; the latter can obtain medium temperature, as long as one-dimensional tracking is performed. Whether it is a rotating parabolic concentrator or a trough parabolic mirror concentrator, the system will continue to operate while tracking the sun, and it is difficult to connect with the ground energy storage system. Secondly, there is also a Fresnel reflective line concentrator. The advantage is that the receiver does not need to move, and it is more convenient to connect with the ground system. The disadvantage is that the Fresnel reflector has a cosine effect, which is not conducive to concentrating sunlight on a small area. In addition, solar energy can be used not only for heat collection, but also for power generation. If the two can be used comprehensively, the utilization rate of solar energy can be greatly improved.

Utility model content

The purpose of this utility model is to provide a thermoelectric integrated high-temperature solar heat collector based on Fresnel transmission for the above-mentioned deficiencies in the prior art. The sun's rays converge on the vacuum heat collector to obtain high-temperature heat energy, and at the same time, the thin-film solar cells can also use the sun's rays to generate electricity, realizing thermoelectric integration.

The technical scheme adopted by the utility model based on the thermoelectric integration of Fresnel transmission is as follows:

The utility model is based on Fresnel transmission thermoelectric integrated solar high-temperature heat collector, which includes a heat collector body, the heat collector body includes a vacuum tube and a Fresnel transmission-type concentrator, and the Fresnel transmission-type concentrator The part is arranged on the upper part of the vacuum tube, the centerline of the Fresnel transmission-type light-condensing part is facing the sun rays, and the vacuum tube is placed on the focal point of the Fresnel transmission-type light-condensing part; the Fresnel transmission-type light-condensing part is Fresnel transmission concentrator or Fresnel transmission concentrator curve structure, both Fresnel transmission concentrator and Fresnel transmission concentrator curve structure are circular arc structures, within the arc structure The surface is provided with continuous and irregular jagged inward protrusions; the vacuum tube includes a tubular shell, heat pipes, heat-absorbing fins, wires, end caps and thin-film solar cells. A heat pipe installation hole is provided, and the heat pipe is inserted into the interior of the tubular shell through the heat pipe installation hole. The outer wall of the heat pipe and the inner wall of the tubular shell form a sandwich space. The sandwich space is a vacuum interlayer space. On the upper part of the heat-absorbing fins, the wires are connected with the thin-film solar cells.

As a preferred solution of the present utility model, the main body of the heat collector includes a vacuum tube, a Fresnel transmission concentrator, an arc-shaped shell and a seal. The number of seals is two, and the two seals are installed on the left and right sides of the vacuum tube respectively. At both ends, the arc-shaped shell is arranged on the upper part of the vacuum tube through a seal, and the Fresnel transmission type concentrator is attached to the inner surface of the arc-shaped shell.

As a preferred solution of the present invention, the heat collector body includes a vacuum tube and a Fresnel transmission concentrator, and the Fresnel transmission concentrator is nested outside the vacuum tube.

As a preferred solution of the present invention, the main body of the heat collector includes a vacuum tube, and the upper wall of the tube-shaped housing of the vacuum tube is arranged in the form of a Fresnel transmission-type concentrating curve structure.

As a preferred solution of the present invention, the thin film solar cell is a transparent thin film solar cell.

As a preferred solution of the present utility model, there is an oblique angle between the serrated inward protrusions of the Fresnel transmission concentrator or the Fresnel transmission concentrator curve structure, and the oblique angle is used to ensure that the sun's rays pass through Collected into the vacuum tube after refraction.

The advantages of the utility model based on Fresnel transmission thermoelectric integrated high-temperature solar heat collector are: (1) The previous structure of the heat collecting equipment in front of the concentrator is changed, so there is no need to worry that the heat collecting equipment blocks the concentrator (2) Using the Fresnel lens concentrating principle, the heat collecting equipment can obtain high temperature more easily; (3) The heat absorbing sheet and the thin film solar cell can work together, and can also collect heat while collecting heat. Generate electricity and greatly improve the utilization rate of solar energy. (4) There is no need to track sunlight, and efficient use of solar energy.

Description of drawings

Fig. 1 is a structural schematic diagram of Embodiment 1 of the high-temperature solar heat collector based on Fresnel transmission of the present invention with integrated thermoelectricity.

Fig. 2 is a working principle diagram of embodiment 1 of the high-temperature solar heat collector based on Fresnel transmission of the utility model with integrated thermoelectricity.

Fig. 3 is a structural schematic diagram of Embodiment 2 of the high-temperature solar heat collector based on Fresnel transmission of the present invention with integrated thermoelectricity.

Fig. 4 is a structural schematic diagram of embodiment 3 of the high-temperature solar thermal collector based on Fresnel transmission of the present invention with integrated thermoelectricity.

Detailed ways

Example 1

As shown in Figures 1 and 2, this embodiment is based on Fresnel transmission thermoelectric integrated high-temperature solar heat collectors, including a heat collector body, which includes a vacuum tube and a Fresnel transmission type concentrator , the Fresnel transmission-type concentrating part is arranged on the upper part of the vacuum tube, the center line of the Fresnel transmission-type concentrating part is directly facing the sun's rays, and the vacuum tube is placed on the focal point of the Fresnel transmission-type concentrating part. The Fresnel transmission concentrating part is a Fresnel transmission concentrator or a Fresnel transmission concentrating curve structure, and both the Fresnel transmission concentrator and the Fresnel transmission concentrating curve structure are circular arcs Shaped structure, the inner surface of the arc-shaped structure is provided with continuous and irregular zigzag inward protrusions.

The main body of the heat collector includes a vacuum tube, a Fresnel transmissive concentrator 1-1, an arc-shaped casing 3 and a seal 8, the number of seals 8 is two, and the two seals 8 are installed on the left and right sides of the vacuum tube respectively. At the end, the arc-shaped shell 3 is set on the upper part of the vacuum tube through the seal 8, and the Fresnel transmission concentrator 1-1 is attached to the inner surface of the arc-shaped shell 3. The Fresnel transmissive concentrator 1-1 is an arc-shaped structure, and the inner surface of the arc-shaped structure is provided with continuous and irregular zigzag inward protrusions. There is an oblique angle between the serrated inward protrusions of the Fresnel transmission concentrator, and the oblique angle is used to ensure that the sun's rays are refracted and then collected into the vacuum tube.

The vacuum tube includes a tubular shell 2, a heat pipe 4, heat-absorbing fins 5, a wire 7, an end cover 11 and a thin-film solar cell 6. The end cover 11 is clamped at one end of the tubular shell 2, and a heat pipe installation hole is arranged in the middle of the end cover 11. The heat pipe 4 is inserted inside the tubular housing 2 through the heat pipe installation hole, the outer wall of the heat pipe 4 and the inner wall of the tubular housing 2 form a sandwich space, the interlayer space is a vacuum interlayer space, the heat-absorbing fin 5 is arranged on the upper part of the heat pipe 4, and the thin-film solar cell 6 is arranged On the upper part of the heat absorbing fin 5 , the wire 7 is connected with the thin film solar cell 6 . The heat-absorbing fins 5 and the thin-film solar cells 6 overlap and cover, and their front faces are all directly facing the sun's rays. The thin film solar cell 6 is a transparent thin film solar cell. By adopting a transparent type, it is possible to utilize solar power to generate electricity without affecting the heat collection of the heat absorbing sheet.

Working principle: Sunlight enters the tubular casing 2 along the central line of the arc-shaped casing 3 and the Fresnel transmissive concentrator 1-1, and after being refracted by the Fresnel lens located on the inner surface of the arc-shaped casing 3, the refracted light converges into the vacuum tube to generate high-temperature heat energy, and the heat pipe transfers the high-temperature heat energy from the vacuum tube to the external energy supply system. At the same time, thin-film solar cells can also absorb sunlight without affecting the work of the heat-absorbing sheet, thereby converting solar energy into electrical energy, and the current is transmitted to the inverter by the wire to supply the energy-consuming system. Realize the integration of thermoelectricity and greatly improve the utilization rate of solar energy.

Example 2

As shown in Figure 3, this embodiment is based on Fresnel transmission thermoelectric integrated high-temperature solar heat collector, including a heat collector body, the heat collector body includes a vacuum tube and a Fresnel transmission type concentrator, the Fresnel transmission The Niell transmission-type light-concentrating part is arranged on the upper part of the vacuum tube, the center line of the Fresnel transmission-type light-condensing part is directly facing the sun's rays, and the vacuum tube is placed on the focal point of the Fresnel transmission-type light-condensing part. The Fresnel transmission concentrating part is a Fresnel transmission concentrator or a Fresnel transmission concentrating curve structure, and both the Fresnel transmission concentrator and the Fresnel transmission concentrating curve structure are circular arcs Shaped structure, the inner surface of the arc-shaped structure is provided with continuous and irregular zigzag inward protrusions.

The heat collector body includes a vacuum tube and a Fresnel transmission concentrator 1-1, and the Fresnel transmission concentrator 1-1 is nested outside the vacuum tube. The Fresnel transmissive concentrator 1-1 is an arc-shaped structure, and the inner surface of the arc-shaped structure is provided with continuous and irregular zigzag inward protrusions. There is an oblique angle between the serrated inward protrusions of the Fresnel transmission concentrator, and the oblique angle is used to ensure that the sun's rays are refracted and then collected into the vacuum tube.

The vacuum tube includes a tubular shell 2, a heat pipe 4, heat-absorbing fins 5, a wire 7, an end cover 11 and a thin-film solar cell 6. The end cover 11 is clamped at one end of the tubular shell 2, and a heat pipe installation hole is arranged in the middle of the end cover 11. The heat pipe 4 is inserted inside the tubular housing 2 through the heat pipe installation hole, the outer wall of the heat pipe 4 and the inner wall of the tubular housing 2 form a sandwich space, the interlayer space is a vacuum interlayer space, the heat-absorbing fin 5 is arranged on the upper part of the heat pipe 4, and the thin-film solar cell 6 is arranged On the upper part of the heat absorbing fin 5 , the wire 7 is connected with the thin film solar cell 6 . The heat-absorbing fins 5 and the thin-film solar cells 6 overlap and cover, and their front faces are all directly facing the sun's rays. The thin film solar cell 6 is a transparent thin film solar cell. By adopting the transparent type, it is possible to utilize solar power to generate electricity without affecting the heat collection of the heat absorbing sheet.

Working principle: The sun's rays enter the vacuum tube along the center line of the Fresnel transmission concentrator 1-1. After being refracted by the Fresnel lens, the refracted light converges into the vacuum tube to generate high-temperature heat energy, and the high-temperature heat is transferred by the heat pipe 4. The heat energy is transferred from the vacuum tube to the external energy supply system. At the same time, the thin-film solar cell 6 can also absorb sunlight without affecting the work of the heat-absorbing sheet, thereby converting solar energy into electrical energy, and the current is transmitted to the inverter by the wire to supply the energy-consuming system. Realize the integration of thermoelectricity and greatly improve the utilization rate of solar energy.

Example 3

As shown in Figure 4, this embodiment is based on Fresnel transmission thermoelectric integrated high-temperature solar heat collector, including a heat collector body, the heat collector body includes a vacuum tube and a Fresnel transmission type concentrator, the Fresnel transmission The Niell transmission-type light-concentrating part is arranged on the upper part of the vacuum tube, the center line of the Fresnel transmission-type light-condensing part is directly facing the sun's rays, and the vacuum tube is placed on the focal point of the Fresnel transmission-type light-condensing part. The Fresnel transmission concentrating part is a Fresnel transmission concentrator or a Fresnel transmission concentrating curve structure, and both the Fresnel transmission concentrator and the Fresnel transmission concentrating curve structure are circular arcs Shaped structure, the inner surface of the arc-shaped structure is provided with continuous and irregular zigzag inward protrusions.

The main body of the heat collector includes a vacuum tube, and the upper wall of the tubular casing 2 of the vacuum tube is set in the form of a Fresnel transmission-type concentrating curve structure 1-2. The Fresnel transmission-type light-concentrating curve structure 1-2 is an arc-shaped structure, and there are continuous and irregular zigzag inward protrusions on the inner surface of the arc-shaped structure. The serrated inward protrusions of the Fresnel transmission-type concentrating curve structure have oblique angles between them, and the oblique angles are used to ensure that the sun's rays are refracted and collected into the vacuum tube.

The vacuum tube includes a tubular shell 2, a heat pipe 4, heat-absorbing fins 5, a wire 7, an end cover 11 and a thin-film solar cell 6. The end cover 11 is clamped at one end of the tubular shell 2, and a heat pipe installation hole is arranged in the middle of the end cover 11. The heat pipe 4 is inserted inside the tubular housing 2 through the heat pipe installation hole, the outer wall of the heat pipe 4 and the inner wall of the tubular housing 2 form a sandwich space, the interlayer space is a vacuum interlayer space, the heat-absorbing fin 5 is arranged on the upper part of the heat pipe 4, and the thin-film solar cell 6 is arranged On the upper part of the heat absorbing fin 5 , the wire 7 is connected with the thin film solar cell 6 . The heat-absorbing fins 5 and the thin-film solar cells 6 overlap and cover, and their front faces are all directly facing the sun's rays. The thin film solar cell 6 is a transparent thin film solar cell. By adopting a transparent type, it is possible to utilize solar power to generate electricity without affecting the heat collection of the heat absorbing sheet.

Working principle: The sun's rays enter the tubular shell along the center line of the Fresnel transmission concentrating curve structure. After being refracted by the Fresnel lens, the refracted light converges into the vacuum tube to generate high-temperature heat energy, which is then transferred by the heat pipe to the vacuum tube. The vacuum tube is transferred to the external energy supply system. At the same time, the thin-film solar cell 6 can also absorb sunlight without affecting the work of the heat-absorbing sheet, thereby converting solar energy into electrical energy, and the current is transmitted to the inverter by the wire 7 to supply the energy-consuming system. Realize the integration of thermoelectricity and greatly improve the utilization rate of solar energy. By directly designing the part of the vacuum tube that receives sunlight into a curve in the form of a Fresnel transmission device, the concentrating device and thermal power generation are integrated.

Claims (6)

1. A thermoelectric high-temperature solar heat collector based on Fresnel transmission, comprising a heat collector body, characterized in that: the heat collector body includes a vacuum tube and a Fresnel transmission type light-collecting part, Fresnel The Fresnel transmission-type light-condensing part is arranged on the upper part of the vacuum tube, the center line of the Fresnel transmission-type light-condensing part is facing the sun rays, and the vacuum tube is placed on the focal point of the Fresnel transmission-type light-condensing part; the Fresnel transmission The concentrating part is Fresnel transmission concentrator (1-1) or Fresnel transmission concentrator curve structure (1-2), Fresnel transmission concentrator and Fresnel transmission concentrator The curved structures are arc-shaped structures, and the inner surface of the arc-shaped structures is provided with continuous and irregular sawtooth-shaped inward protrusions; the vacuum tube includes a tubular shell (2), heat pipes (4), heat-absorbing fins (5 ), wires (7), end caps (11) and thin-film solar cells (6), the end caps (11) are clamped at one end of the tubular casing (2), and a heat pipe installation hole is provided in the middle of the end cap (11), and the heat pipes ( 4) It is inserted inside the tubular housing (2) through the heat pipe installation hole, and the outer wall of the heat pipe (4) and the inner wall of the tubular housing (2) form a sandwich space, which is a vacuum sandwich space, and the heat-absorbing fins (5) are arranged on On the upper part of the heat pipe (4), the thin-film solar cell (6) is arranged on the upper part of the heat-absorbing fin (5), and the wire (7) is connected to the thin-film solar cell (6). 2. The thermoelectric high-temperature solar heat collector based on Fresnel transmission according to claim 1, characterized in that: the collector body includes a vacuum tube, a Fresnel transmission concentrator, an arc-shaped shell ( 3) and seals (8), the number of seals (8) is two, and the two seals (8) are installed on the left and right ends of the vacuum tube respectively, and the arc-shaped shell (3) is set on the vacuum tube through the seals (8) In the upper part, the Fresnel transmission concentrator (1-1) is attached to the inner surface of the arc-shaped casing (3). 3. The thermoelectric high-temperature solar heat collector based on Fresnel transmission according to claim 1, characterized in that: the collector body comprises a vacuum tube and a Fresnel transmission concentrator (1-1 ), the Fresnel transmission concentrator (1-1) is nested outside the vacuum tube. 4. The thermoelectric high-temperature solar heat collector based on Fresnel transmission according to claim 1, characterized in that: the main body of the heat collector comprises a vacuum tube, and the upper wall of the tubular shell of the vacuum tube is set to Fresnel transmission Concentrating curve structure (1-2) form. 5. The Fresnel transmission-based thermoelectric integrated high-temperature solar heat collector according to claim 2, 3 or 4, characterized in that: the thin-film solar cell (6) is a transparent thin-film solar cell. 6. The thermoelectric high-temperature solar heat collector based on Fresnel transmission according to claim 2 or 3 or 4, characterized in that: the Fresnel transmission concentrator (1-1) or phenanthrene There is an oblique angle between the serrated inward protrusions of the Niell transmissive concentrating curve structure (1-2), and the oblique angle is used to ensure that the sun's rays are refracted and collected into the vacuum tube.