Composite hyperboloid condenser optimization method for eliminating multiple reflections

Abstract

The invention relates to the technical field of condensers, in particular to a composite hyperboloid condenser optimization method for eliminating multiple reflections. The method comprises the following steps: S1, determining a hyperboloid part causing multiple reflections and a hyperboloid part only having single reflections according to a ray tracing result of CHC hyperboloids; s2, cutting off a hyperboloid part which causes multiple reflections, and eliminating the multiple reflections; s3, a truncated CHC is obtained; s4, obtaining the parameters of the truncated condenser by solving a plurality of equations; and S5, outputting the optical efficiency and the irradiation non-uniformity of the two condensers under the condition of different solar incident angles. The invention provides a composite hyperboloid condenser optimization method for eliminating multiple reflections, which reduces the reflection times of light in a condenser, improves the optical efficiency of the condenser and keeps good irradiation uniformity.

Description

Technical Field

[0001] This invention relates to the field of concentrator technology, and in particular to an optimization method for composite hyperboloid concentrators that eliminates multiple reflections. Background Technology

[0002] Current research on concentrators mainly focuses on CPC and V-type concentrators. However, CPC has a long geometric profile and a large aspect ratio, resulting in poor uniformity of energy flux distribution on the receiving surface and low optical efficiency. V-type concentrators, on the other hand, have a smaller half-angle of light collection, and their geometric concentration ratio generally does not exceed 3. Although CHC has a wide receiving angle and good irradiance uniformity, its optical efficiency is reduced by multiple reflections at certain incident angles.

[0003] For example, in patent publication number CN115540367A, entitled "A Segmented CPC Solar Concentrator and Its Design Method," the composite parabolic reflector is fixed within a frame; the flat receiving surface is the heat-absorbing surface of the flat concentrator, and the composite parabolic reflector is symmetrically placed on both sides of the flat receiving surface; the composite parabolic reflector is composed of multiple sub-reflectors, which are connected end to end in sequence. From bottom to top, the focal lines generated by each sub-reflector on the flat receiving surface are evenly distributed from the center to both sides, and the focal lines of each sub-reflector are at different positions and parallel to each other. The disadvantage is that the CPC concentrator has a long geometric shape and a large aspect ratio, resulting in poor uniformity of energy flow distribution on the receiving surface and low optical efficiency. Summary of the Invention

[0004] To address the problems in the prior art, this invention provides an optimization method for composite hyperboloid concentrators that eliminates multiple reflections, reducing the number of reflections of light in the concentrator, improving the optical efficiency of the concentrator, and maintaining good irradiance uniformity.

[0005] To achieve the above-mentioned technical objectives, the present invention provides a technical solution: an optimization method for a composite hyperboloid concentrator to eliminate multiple reflections, comprising the following steps: S1, Based on the ray tracing results of the CHC hyperboloid, determine the hyperboloid portion that causes multiple reflections and the hyperboloid portion that only has a single reflection; S2, remove the hyperboloid portion that causes multiple reflections and eliminate multiple reflections; S3. Draw a schematic diagram of the original CHC with the x-axis as the horizontal axis and the y-axis as the vertical axis, and determine the critical point N for single reflection and multiple reflection. When light shines from point K in a direction parallel to the y-axis and is reflected once by the mirror to point N, the angle between KN and the y-axis is the maximum receiving half angle. Shorten the original CHC along the MN dotted line to obtain a concentrator that only undergoes single reflection, and obtain the shortened CHC. S4, based on the distance from point N to the y-axis The concentration ratio CR is obtained by solving multiple equations simultaneously to obtain the parameters of the truncated concentrator. The multiple equations include the equation of the untruncated hyperbola, the equation of the truncated hyperbola, the equation based on the KLQ similarity principle of triangles, and the concentration ratio equation of the truncated concentrator. The parameters of the truncated concentrator are obtained by solving multiple equations. S5 constructs 3D physical models of the original CHC and the truncated CHC under the same concentration ratio. The 3D models are then imported into TracePro software. The same output aperture width and solar irradiation receiving surface are input, while different concentrator heights, concentrator mirror areas, and arc lengths are input. The optical efficiency and irradiation nonuniformity of the two concentrators under different solar incidence angles are output.

[0006] In this technical solution, in step S1, based on the ray tracing results of the CHC hyperboloid, the hyperboloid portions that cause multiple reflections and those that only have single reflections can be accurately determined. Based on this, step S2 directly removes the hyperboloid portions that cause multiple reflections, fundamentally preventing multiple reflections of light in these portions, effectively reducing the number of reflections of light within the concentrator, and making the light propagation path simpler and more efficient. Step S3 accurately finds the critical point N for single and multiple reflections by drawing a schematic diagram of the original CHC. Using the assumption that when light is incident from point K in a direction parallel to the y-axis and reflects once to point N, the angle between KN and the y-axis is the maximum receiving half-angle, the original CHC is shortened along the MN dotted line, resulting in a concentrator that only experiences single reflections. This further restricts the reflection area of ​​light within the concentrator, ensuring that light mainly undergoes single reflections, greatly reducing the possibility of multiple reflections. Step S4 uses the distance from point N to the y-axis and the concentration ratio CR to solve multiple equations to obtain the parameters of the truncated concentrator. These equations cover the equations for the untruncated hyperbola, the truncated hyperbola, equations based on the KLQ similarity principle of triangles, and the concentration ratio equation for the truncated concentrator. Solving these equations yields the optimal parameters for the truncated concentrator, making its structure more rational and improving the efficiency of light propagation and focusing within the concentrator, thus enhancing its optical efficiency. Step S5 constructs 3D physical models of the original CHC and the truncated CHC under the same concentration ratio and imports them into TracePro software for analysis. Under the same output aperture width and solar irradiance receiving surface conditions, different concentrator heights, concentrating mirror areas, and arc lengths are input to output the optical efficiency of the two concentrators under different solar incidence angles. The results show that as the concentration ratio gradually increases, the receiving half-angle of the truncated CHC is smaller than that of the original CHC, and the difference between the two receiving half-angles becomes more significant with increasing concentration ratio. When the sun is incident perpendicularly, the optical efficiency of the truncated CHC is greater than that of the original CHC, and the difference also becomes more significant with increasing concentration ratio. This fully demonstrates that the design method can effectively improve the optical efficiency of the concentrator. By reducing the number of reflections and optimizing parameters, the truncated CHC allows light to be distributed more evenly on the solar irradiation receiving surface, thus maintaining good irradiance uniformity.

[0007] The present invention further specifies that the calculation formula for the maximum receiving half-angle is: ; Where θ is the angle between KN and the y-axis, which is the maximum receiving half angle, and C is the concentration ratio.

[0008] The present invention is further configured such that: the parameters of the truncated concentrator include the horizontal semi-axis length a, and the distance difference between point L and point N to the x-axis. The difference in distance from point N to point P to the x-axis , where c is the distance from the focal point to the center.

[0009] The present invention is further configured such that the equation of the untruncated hyperbola is: ; The equation of the truncated hyperbola is: ; The equation based on the KLQ similarity principle of triangles is: ; The concentration ratio equation of the truncated concentrator is: ; Where 'a' is the length of the horizontal semi-axis, Let N be the distance from point N to the y-axis, and c be the distance from the focus to the center. Let L be the difference in distance from point L to the x-axis. CR is the difference in distance from point N and point P to the x-axis, and CR is the concentration ratio of the truncated concentrator.

[0010] The present invention is further configured such that the optical efficiency and irradiance nonuniformity of the two types of output concentrators under different solar incidence angles include: As the concentration ratio gradually increases, the receiving half-angle of both the truncated CHC and the original CHC decreases overall. The receiving half-angle of the truncated CHC is smaller than that of the original CHC, and the difference between the two receiving half-angles becomes more and more significant as the concentration ratio increases. When the sun is incident perpendicularly, as the concentration ratio gradually increases, the optical efficiency of both the truncated CHC and the original CHC decreases overall. The optical efficiency of the truncated CHC is greater than that of the original CHC, and the difference in optical efficiency between the two becomes more significant as the concentration ratio increases.

[0011] This technical solution systematically evaluates the impact of design methods on concentrator performance by clarifying the changes in the receiving half-angle and optical efficiency of truncated CHC and original CHC under different concentration ratios and solar incidence angles. For example, it is understood that the receiving half-angle of both concentrators generally decreases as the concentration ratio gradually increases, providing a basis for judging the light-collecting capability of the concentrator under different concentration requirements. Knowing that the receiving half-angle of truncated CHC is smaller than that of original CHC, and the difference becomes significant with increasing concentration ratio, and that the optical efficiency of truncated CHC is greater than that of original CHC, with the difference also becoming significant with increasing concentration ratio, the specific role of truncated design in improving concentrator performance can be clearly recognized. A comparison with original CHC highlights the advantages of truncated CHC. In terms of receiving half-angle, truncated CHC is smaller, meaning it can collect light more effectively and reduce light loss; in terms of optical efficiency, truncated CHC is higher, indicating better performance in converting light into usable energy or signals. In practical applications, different scenarios have different requirements for concentration ratio and solar incidence angle. By understanding the performance differences between the two types of concentrators under different concentration ratios and solar incidence angles, the appropriate concentrator type can be selected based on the specific scenario. For example, in scenarios requiring a high concentration ratio and a relatively perpendicular solar incidence angle, a truncated CHC is a better choice.

[0012] The present invention is further configured such that the optical efficiency and irradiance nonuniformity of the two types of concentrators under different solar incidence angles are obtained by simulation, which includes data on the optical efficiency, irradiance distribution and number of reflected rays of the solar irradiance receiving surface, in order to verify the effect of the design method on improving optical efficiency and irradiance uniformity.

[0013] In this technical solution, simulations are used to obtain data on the optical efficiency, irradiance distribution, and reflected ray count of the solar irradiance receiving surface. This allows for a comprehensive and quantitative verification of the design method's effectiveness in improving optical efficiency and irradiance uniformity from multiple key dimensions. Optical efficiency data directly reflects the concentrator's ability to convert solar radiation into usable energy, irradiance distribution data demonstrates the uniformity of light distribution on the receiving surface, and reflected ray count data reflects the reflection of light within the concentrator. These data corroborate each other, providing a solid basis for evaluating the effectiveness of the design method.

[0014] The present invention is further configured such that the verification design method improves optical efficiency and irradiance uniformity as follows: when the concentration ratio is 1.5, the optical efficiency of the truncated CHC under different incident angle conditions is greater than that of the original CHC, and the non-uniformity is less than that of the original CHC.

[0015] This technical solution clearly demonstrates the advantages of truncated CHC in terms of optical efficiency and irradiance uniformity by comparing it with the original CHC. With a concentration ratio of 1.5, the truncated CHC exhibits higher optical efficiency, meaning it can more effectively convert solar radiation into usable energy; its lower non-uniformity indicates a more even distribution of light on the solar irradiation receiving surface, improving the stability and consistency of energy harvesting.

[0016] The present invention is further configured such that: the verification design method improves the optical efficiency and irradiance uniformity by: when the light concentration ratio is 2.25 and the incident angle is small, the original CHC has a higher proportion of reflections at two or more times than the truncated CHC, and the optical efficiency of the original CHC is lower than that of the truncated CHC; both the original CHC and the truncated CHC have some light leakage, and the leakage light increases as the incident angle increases.

[0017] This technical solution demonstrates the advantages of truncated CHC in reducing multiple reflections by comparing the proportion of original CHC and truncated CHC in terms of 2 or more reflections.

[0018] The beneficial effects of the present invention are: (1) reducing the number of reflections of light in the concentrator, improving the optical efficiency of the concentrator, and maintaining good irradiance uniformity; (2) in step S1, based on the ray tracing results of the CHC hyperboloid, the hyperboloid part that causes multiple reflections and the hyperboloid part that only has single reflections can be accurately determined. Based on this, step S2 directly removes the hyperboloid part that causes multiple reflections, thereby avoiding multiple reflections of light in this part from the root, effectively reducing the number of reflections of light inside the concentrator, and making the light propagation path simpler and more efficient. In step S3, by drawing the original CHC schematic diagram, the critical point N for single reflection and multiple reflections is accurately found. Based on the fact that when light is irradiated from point K in a direction parallel to the y-axis and is reflected once by the mirror to point N, the angle between KN and the y-axis is the maximum receiving half angle, and the MN dotted line is drawn. The original CHC is truncated to obtain a concentrator that only undergoes single reflection, further limiting the reflection area of ​​light within the concentrator and ensuring that light mainly undergoes single reflection, greatly reducing the possibility of multiple reflections. In step S4, based on the distance from point N to the y-axis and the concentration ratio CR, multiple equations are solved simultaneously to obtain the parameters of the truncated concentrator. These equations cover the equations of the untruncated hyperbola, the truncated hyperbola, the equations based on the KLQ similarity principle of triangles, and the concentration ratio equation of the truncated concentrator. By solving these equations, the optimal parameters of the truncated concentrator can be obtained, making the structure of the concentrator more reasonable and the propagation and focusing of light within the concentrator more efficient, thereby improving the optical efficiency of the concentrator. In step S5, 3D physical models of the original CHC and the truncated CHC under the same concentration ratio are constructed and imported into TracePro software for analysis. Attached Figure Description

[0019] Figure 1 This is a flowchart of the design method in this invention; Figure 2 This is the design drawing of the truncated CHC geometric line in this invention; Figure 3 This is the truncated CHC design diagram in this invention; Figure 4 This is a comparison diagram of the original CHC and the truncated CHC under different concentration ratios in this invention. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only one preferred embodiment of this invention and are only used to explain this invention. They do not limit the scope of protection of this invention. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0021] like Figures 1 to 4 As shown in the figure, as an embodiment of the present invention, an optimization method for a composite hyperboloid concentrator to eliminate multiple reflections includes the following steps: S1, Based on the ray tracing results of the CHC hyperboloid, determine the hyperboloid portion that causes multiple reflections and the hyperboloid portion that only has a single reflection; S2, remove the hyperboloid portion that causes multiple reflections and eliminate multiple reflections; S3. Draw a schematic diagram of the original CHC with the x-axis as the horizontal axis and the y-axis as the vertical axis, and determine the critical point N for single reflection and multiple reflection. When light shines from point K in a direction parallel to the y-axis and is reflected once by the mirror to point N, the angle between KN and the y-axis is the maximum receiving half angle. Shorten the original CHC along the MN dotted line to obtain a concentrator that only undergoes single reflection, and obtain the shortened CHC. S4, based on the distance from point N to the y-axis The concentration ratio CR is obtained by solving multiple equations simultaneously to obtain the parameters of the truncated concentrator. The multiple equations include the equation of the untruncated hyperbola, the equation of the truncated hyperbola, the equation based on the KLQ similarity principle of triangles, and the concentration ratio equation of the truncated concentrator. The parameters of the truncated concentrator are obtained by solving multiple equations. S5 constructs 3D physical models of the original CHC and the truncated CHC under the same concentration ratio. The 3D models are then imported into TracePro software. The same output aperture width and solar irradiation receiving surface are input, while different concentrator heights, concentrator mirror areas, and arc lengths are input. The optical efficiency and irradiation nonuniformity of the two concentrators under different solar incidence angles are output.

[0022] In this technical solution, in step S1, based on the ray tracing results of the CHC hyperboloid, the hyperboloid portions that cause multiple reflections and those that only have single reflections can be accurately determined. Based on this, step S2 directly truncates the hyperboloid portions that cause multiple reflections, fundamentally preventing multiple reflections of light in these portions, effectively reducing the number of reflections of light within the concentrator, and making the light propagation path simpler and more efficient. Step S3 accurately finds the critical point N for single and multiple reflections by drawing a schematic diagram of the original CHC. Using the assumption that when light is incident from point K in a direction parallel to the y-axis and reflects once to point N, the angle between KN and the y-axis is the maximum receiving half-angle, the original CHC is shortened along the MN dotted line, resulting in a concentrator that only experiences single reflections. This further restricts the reflection area of ​​light within the concentrator, ensuring that light mainly undergoes single reflections, greatly reducing the possibility of multiple reflections. Step S4 uses the distance from point N to the y-axis and the concentration ratio CR to solve multiple equations to obtain the parameters of the truncated concentrator. These equations cover the equations for the untruncated hyperbola, the truncated hyperbola, equations based on the KLQ similarity principle of triangles, and the concentration ratio equation for the truncated concentrator. Solving these equations yields the optimal parameters for the truncated concentrator, making its structure more rational and improving the efficiency of light propagation and focusing within the concentrator, thus enhancing its optical efficiency. Step S5 constructs 3D physical models of the original CHC and the truncated CHC under the same concentration ratio and imports them into TracePro software for analysis. Under the same output aperture width and solar irradiance receiving surface conditions, different concentrator heights, concentrating mirror areas, and arc lengths are input to output the optical efficiency of the two concentrators under different solar incidence angles. The results show that as the concentration ratio gradually increases, the receiving half-angle of the truncated CHC is smaller than that of the original CHC, and the difference between the two receiving half-angles becomes more significant with increasing concentration ratio. When the sun is incident perpendicularly, the optical efficiency of the truncated CHC is greater than that of the original CHC, and the difference also becomes more significant with increasing concentration ratio. This fully demonstrates that the design method can effectively improve the optical efficiency of the concentrator. By reducing the number of reflections and optimizing parameters, the truncated CHC allows light to be distributed more evenly on the solar irradiation receiving surface, thus maintaining good irradiance uniformity.

[0023] Specifically, the formula for calculating the maximum receiving half-angle is: ; Where θ is the angle between KN and the y-axis, which is the maximum receiving half angle, and C is the concentration ratio.

[0024] Furthermore, the parameters of the truncated concentrator include the horizontal semi-axis length 'a', and the distance difference between point L and point N to the x-axis. The difference in distance from point N to point P to the x-axis , where c is the distance from the focal point to the center.

[0025] Specifically, the equation of the untruncated hyperbola is: ; The equation of the truncated hyperbola is: ; The equation based on the KLQ similarity principle of triangles is: ; The concentration ratio equation of the truncated concentrator is: ; Where 'a' is the length of the horizontal semi-axis, Let N be the distance from point N to the y-axis, and c be the distance from the focus to the center. Let L be the difference in distance from point L to the x-axis. CR is the difference in distance from point N and point P to the x-axis, and CR is the concentration ratio of the truncated concentrator.

[0026] Specifically, refer to Figure 4 The optical efficiency and irradiance nonuniformity of the two types of concentrators under different solar incidence angles include: As the concentration ratio gradually increases, the receiving half-angle of both the truncated CHC and the original CHC decreases overall. The receiving half-angle of the truncated CHC is smaller than that of the original CHC, and the difference between the two receiving half-angles becomes more and more significant as the concentration ratio increases. When the sun is incident perpendicularly, as the concentration ratio gradually increases, the optical efficiency of both the truncated CHC and the original CHC decreases overall. The optical efficiency of the truncated CHC is greater than that of the original CHC, and the difference in optical efficiency between the two becomes more significant as the concentration ratio increases.

[0027] This technical solution systematically evaluates the impact of design methods on concentrator performance by clarifying the changes in the receiving half-angle and optical efficiency of truncated CHC and original CHC under different concentration ratios and solar incidence angles. For example, it is understood that the receiving half-angle of both concentrators generally decreases as the concentration ratio gradually increases, providing a basis for judging the light-collecting capability of the concentrator under different concentration requirements. Knowing that the receiving half-angle of truncated CHC is smaller than that of original CHC, and the difference becomes significant with increasing concentration ratio, and that the optical efficiency of truncated CHC is greater than that of original CHC, with the difference also becoming significant with increasing concentration ratio, the specific role of truncated design in improving concentrator performance can be clearly recognized. A comparison with original CHC highlights the advantages of truncated CHC. In terms of receiving half-angle, truncated CHC is smaller, meaning it can collect light more effectively and reduce light loss; in terms of optical efficiency, truncated CHC is higher, indicating better performance in converting light into usable energy or signals. In practical applications, different scenarios have different requirements for concentration ratio and solar incidence angle. By understanding the performance differences between the two types of concentrators under different concentration ratios and solar incidence angles, the appropriate concentrator type can be selected based on the specific scenario. For example, in scenarios requiring a high concentration ratio and a relatively perpendicular solar incidence angle, a truncated CHC is a better choice.

[0028] Specifically, the output of optical efficiency and irradiance nonuniformity for the two types of concentrators under different solar incidence angles also includes deriving data on the optical efficiency, irradiance distribution, and reflected ray count of the solar irradiance receiving surface through simulation, to verify the design method's effect on improving optical efficiency and irradiance uniformity. By deriving data on the optical efficiency, irradiance distribution, and reflected ray count of the solar irradiance receiving surface through simulation, the design method's effect on improving optical efficiency and irradiance uniformity can be comprehensively and quantitatively verified from multiple key dimensions. Optical efficiency data directly reflects the concentrator's ability to convert solar radiation energy into usable energy, irradiance distribution data shows the uniformity of light distribution on the receiving surface, and reflected ray count data reflects the reflection of light inside the concentrator. These data corroborate each other, providing a solid basis for evaluating the effectiveness of the design method.

[0029] Specifically, the verification design method improves optical efficiency and irradiance uniformity in the following ways: when the concentration ratio is 1.5, the truncated CHC exhibits higher optical efficiency and lower non-uniformity under different incident angles compared to the original CHC. A comparison with the original CHC clearly demonstrates the advantages of the truncated CHC in terms of optical efficiency and irradiance uniformity. At a concentration ratio of 1.5, the higher optical efficiency of the truncated CHC means it can more effectively convert solar radiation into usable energy; the lower non-uniformity indicates a more uniform distribution of light on the solar irradiance receiving surface, improving the stability and consistency of energy harvesting.

[0030] Specifically, the verification design method's improvement on optical efficiency and irradiance uniformity also includes the following: Under a focusing ratio of 2.25 and a relatively small incident angle, the original CHC exhibits a higher proportion of reflections at or above the second level than the truncated CHC, resulting in lower optical efficiency for the original CHC compared to the truncated CHC. Both the original and truncated CHCs exhibit some light leakage, which increases with the increase in the incident angle. By comparing the proportion of reflections at or above the second level between the original and truncated CHCs, the advantages of the truncated CHC in reducing multiple reflections are demonstrated more concretely.

[0031] The above embodiments, which describe the specific features of the present invention, are only used to further illustrate the present invention and should not be construed as limiting the scope of protection of the present invention. Any non-essential improvements and adjustments made to the present invention by those skilled in the art based on the above description of the invention shall fall within the scope of protection of the present invention.

Claims

1. A method for optimizing a composite hyperboloid concentrator to eliminate multiple reflections, characterized in that, Includes the following steps: S1, Based on the ray tracing results of the CHC hyperboloid, determine the hyperboloid portion that causes multiple reflections and the hyperboloid portion that only has a single reflection; S2, remove the hyperboloid portion that causes multiple reflections and eliminate multiple reflections; S3. Draw a schematic diagram of the original CHC with the x-axis as the horizontal axis and the y-axis as the vertical axis, and determine the critical point N for single reflection and multiple reflection. When light shines from point K in a direction parallel to the y-axis and is reflected once by the mirror to point N, the angle between KN and the y-axis is the maximum receiving half angle. Shorten the original CHC along the MN dotted line to obtain a concentrator that only undergoes single reflection, and obtain the shortened CHC. S4, based on the distance from point N to the y-axis The concentration ratio CR is obtained by solving multiple equations simultaneously to obtain the parameters of the truncated concentrator. The multiple equations include the equation of the untruncated hyperbola, the equation of the truncated hyperbola, the equation based on the KLQ similarity principle of triangles, and the concentration ratio equation of the truncated concentrator. The parameters of the truncated concentrator are obtained by solving multiple equations. S5 constructs 3D physical models of the original CHC and the truncated CHC under the same concentration ratio. The 3D models are then imported into TracePro software. The same output aperture width and solar irradiation receiving surface are input, while different concentrator heights, concentrator mirror areas, and arc lengths are input. The optical efficiency and irradiation nonuniformity of the two concentrators under different solar incidence angles are output.

2. The method for optimizing a composite hyperboloid concentrator to eliminate multiple reflections according to claim 1, characterized in that, The formula for calculating the maximum receiving half-angle is: ； Where θ is the angle between KN and the y-axis, which is the maximum receiving half angle, and C is the concentration ratio.

3. The method for optimizing a composite hyperboloid concentrator to eliminate multiple reflections according to claim 2, characterized in that, The parameters of the truncated concentrator include the horizontal semi-axis length 'a', and the distance difference between point L and point N from the x-axis. The difference in distance from point N to point P to the x-axis , where c is the distance from the focal point to the center.

4. The method for optimizing a composite hyperboloid concentrator to eliminate multiple reflections according to claim 3, characterized in that, The equation of the untruncated hyperbola is: ; The equation of the truncated hyperbola is: ; The equation based on the KLQ similarity principle of triangles is: ; The concentration ratio equation of the truncated concentrator is: ; Where 'a' is the length of the horizontal semi-axis. Let N be the distance from point N to the y-axis, and c be the distance from the focus to the center. Let L be the difference in distance from point L to point N to the x-axis. CR is the difference in distance from point N and point P to the x-axis, and CR is the concentration ratio of the truncated concentrator.

5. The method for optimizing a composite hyperboloid concentrator to eliminate multiple reflections according to claim 1, 2, 3, or 4, characterized in that, The optical efficiency and irradiance nonuniformity of the two types of concentrators under different solar incidence angles include: As the concentration ratio gradually increases, the receiving half-angle of both the truncated CHC and the original CHC decreases overall. The receiving half-angle of the truncated CHC is smaller than that of the original CHC, and the difference between the two receiving half-angles becomes more and more significant as the concentration ratio increases. When the sun is incident perpendicularly, as the concentration ratio gradually increases, the optical efficiency of both the truncated CHC and the original CHC decreases overall. The optical efficiency of the truncated CHC is greater than that of the original CHC, and the difference in optical efficiency between the two becomes more significant as the concentration ratio increases.

6. The method for optimizing a composite hyperboloid concentrator to eliminate multiple reflections according to claim 5, characterized in that, The optical efficiency and irradiance nonuniformity of the two types of concentrators under different solar incidence angles also include data on the optical efficiency, irradiance distribution, and number of reflected rays of the solar irradiance receiving surface obtained through simulation, in order to verify the effect of the design method on improving optical efficiency and irradiance uniformity.

7. The method for optimizing a composite hyperboloid concentrator to eliminate multiple reflections according to claim 6, characterized in that, The verification design method improves optical efficiency and irradiance uniformity as follows: when the concentration ratio is 1.5, the optical efficiency of the truncated CHC is greater than that of the original CHC under different incident angle conditions, and the non-uniformity is less than that of the original CHC.

8. The method for optimizing a composite hyperboloid concentrator to eliminate multiple reflections according to claim 7, characterized in that, The verification design method also improves optical efficiency and irradiance uniformity in the following ways: when the light concentration ratio is 2.25 and the incident angle is small, the original CHC has a higher proportion of reflections at two or more times than the truncated CHC, and the optical efficiency of the original CHC is lower than that of the truncated CHC; both the original CHC and the truncated CHC have some light leakage, and the leakage light increases as the incident angle increases.

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