A method for optimizing a compound hyperboloid condenser that eliminates multiple reflections

Abstract

The present application relates to the technical field of concentrator, in particular to a kind of compound hyperboloid concentrator optimization method for eliminating multiple reflections.Method comprising the following steps:S1, according to the light ray tracing result of CHC hyperboloid, determine the hyperboloid part that causes multiple reflections and only exists single reflection hyperboloid part;S2, cut off the hyperboloid part that causes multiple reflections, and eliminate multiple reflections;S3, obtain truncated CHC;S4, obtain the concentrator parameter after truncation by solving multiple equations;S5, output the optical efficiency and irradiation non-uniformity of two concentrators under different solar incidence angles.The present application provides a kind of compound hyperboloid concentrator optimization method for eliminating multiple reflections, reduces the reflection times of light in concentrator, improves the optical efficiency of concentrator, maintains good irradiation uniformity.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of concentrators, in particular to a composite hyperboloid concentrator optimization method for eliminating multiple reflections. BACKGROUND

[0002] Current concentrator research mainly focuses on CPC and V-type concentrators, but the CPC geometric line is relatively long, and the aspect ratio is relatively large, resulting in poor uniformity of the energy flow distribution on the receiving surface and low optical efficiency; the light collection half-angle of the V-type concentrator is relatively small, and the geometric concentration ratio is generally not more than 3. Although CHC has a wide receiving angle and good irradiation uniformity, its optical efficiency is affected by multiple reflections at certain incident angles.

[0003] As disclosed in patent CN115540367A, a segmented CPC solar concentrator and a design method thereof, the composite parabolic reflector is fixed in the frame; the flat receiving surface is the heat-absorbing surface of the flat plate light-receiving body, and the composite parabolic reflectors are symmetrically arranged on both sides of the flat receiving surface; the composite parabolic reflector is composed of multiple sub-reflectors, and the focal lines of the sub-reflectors are arranged uniformly from the middle to both sides on the flat receiving surface. The focal lines of the sub-reflectors are different in position and parallel to each other. The disadvantage is that the geometric line of the CPC concentrator is relatively long, and the aspect ratio is relatively large, resulting in poor uniformity of the energy flow distribution on the receiving surface and low optical efficiency. SUMMARY

[0004] In view of the problems in the prior art, the present application provides a composite hyperboloid concentrator optimization method for eliminating multiple reflections, which reduces the number of reflections of light in the concentrator, improves the optical efficiency of the concentrator, and maintains good irradiation uniformity.

[0005] To achieve the above technical purposes, the present application provides a technical solution, which is a composite hyperboloid concentrator optimization method for eliminating multiple reflections, comprising the following steps:

[0006] S1, determining the hyperboloid part causing multiple reflections and the hyperboloid part only having single reflection according to the light ray tracing results of the CHC hyperboloid;

[0007] S2, cutting off the hyperboloid part causing multiple reflections and eliminating multiple reflections;

[0008] S3, drawing an original CHC schematic diagram with the x-axis as the horizontal coordinate and the y-axis as the vertical coordinate, and determining the critical point N of single reflection and multiple reflection, wherein when the light ray is irradiated from the K point in a direction parallel to the y-axis and is reflected by the reflector to the point N, the included angle between KN and the y-axis is the maximum receiving half-angle; the original CHC is truncated along the MN dashed line to obtain a concentrator only having single reflection, and a truncated CHC is obtained.

[0009] S4, according to the distance from the point N to the y-axis , the concentration ratio CR, the truncated concentrator parameters are solved by simultaneously solving a plurality of equations; the plurality of equations include an untruncated hyperbolic equation, a truncated hyperbolic equation, an equation based on the principle of triangle similarity, and a concentration ratio equation of the truncated concentrator, and the truncated concentrator parameters are obtained by solving the plurality of equations;

[0010] S5, the original CHC and the truncated CHC under the same concentration ratio are respectively constructed into 3D physical models, the 3D models are imported into TracePro software, the same light outlet width, the solar radiation receiving surface are input, the different concentrator heights, the different concentrator mirror areas, and the different arc lengths are input, and the optical efficiency and the irradiation non-uniformity of the two concentrators under different solar incident angles are output.

[0011] In the technical solution, in step S1, the light ray tracing result of the CHC hyperboloid can accurately determine the hyperboloid part causing multiple reflections and the hyperboloid part only having single reflection. Based on this, step S2 directly cuts off the hyperboloid part causing multiple reflections, which avoids multiple reflections of light rays in this part from the root, effectively reduces the number of reflections of light rays in the condenser, and makes the light ray propagation path more simple and efficient. Step S3 accurately finds the critical point N of single reflection and multiple reflection by drawing the original CHC schematic diagram. When the light ray is irradiated from the K point in the direction parallel to the y-axis and is single-reflected to the point N by the reflector, the angle KN between the y-axis is the maximum receiving half-angle, and the original CHC is shortened along the MN dotted line to obtain the condenser only having single reflection, which further limits the reflection area of the light ray in the condenser and ensures that the light ray mainly has single reflection, thereby greatly reducing the possibility of multiple reflections. Step S4 solves the parameters of the shortened condenser according to the distance of the point N to the y-axis and the condensing ratio CR, and combines multiple equations, which include the equation of the unshortened hyperbola, the equation of the shortened hyperbola, the equation based on the principle of triangle similarity and the condensing ratio equation of the shortened condenser. By solving these equations, the optimal parameters of the shortened condenser can be obtained, the structure of the condenser is more reasonable, the propagation and focusing of the light ray in the condenser are more efficient, and thus the optical efficiency of the condenser is improved. Step S5 constructs 3D physical models of the original CHC and the shortened CHC under the same condensing ratio, and imports them into the TracePro software for analysis. Under the same light outlet width and solar radiation receiving surface conditions, different condenser heights, condensing mirror areas and arc lengths are input, and the optical efficiencies of the two condensers under different solar incidence angles are output. The results show that as the condensing ratio gradually increases, the receiving half-angle of the shortened CHC is smaller than that of the original CHC, and the difference between the receiving half-angles of the two condensers becomes more significant as the condensing ratio increases. When the sun is vertically incident, the optical efficiency of the shortened CHC is greater than that of the original CHC, and the difference between the optical efficiencies of the two condensers also becomes more significant as the condensing ratio increases, which fully proves that the design method can effectively improve the optical efficiency of the condenser. The design idea of reducing the number of reflections and optimizing the parameters can make the light rays more uniformly distributed on the solar radiation receiving surface, thereby maintaining good irradiation uniformity.

[0012] The application further provides that the calculation formula of the maximum receiving half-angle is:

[0013] ;

[0014] wherein θ is the angle KN between the y-axis, and C is the condensing ratio.

[0015] The application further provides that the parameters of the shortened condenser include the transverse half-axis length a, the distance difference of the point L and the point N to the x-axis , and the distance difference of the point N and the point P to the x-axis , the distance c of the focal point from the center.

[0016] The application is further provided that the un-truncated hyperbolic equation is ;

[0017] The truncated hyperbolic equation is ;

[0018] The equation based on the principle of triangle similarity is ;

[0019] The concentration ratio equation of the truncated concentrator is ;

[0020] Wherein, a is the length of the horizontal semi-axis, is the distance of point N to the y-axis, c is the distance of the focal point from the center, is the distance difference of point L and point N to the x-axis, is the distance difference of point N and point P to the x-axis, and CR is the concentration ratio of the truncated concentrator.

[0021] The application is further provided that the optical efficiency and the irradiation non-uniformity of the two concentrators under different solar incident angles include:

[0022] When the concentration ratio gradually increases, the receiving half-angle of the truncated CHC and the original CHC generally decreases, the receiving half-angle of the truncated CHC is smaller than that of the original CHC, and the difference between the receiving half-angles of the two becomes more and more significant as the concentration ratio increases.

[0023] When the concentration ratio gradually increases, the optical efficiency of the truncated CHC and the original CHC generally decreases, the optical efficiency of the truncated CHC is greater than that of the original CHC, and the difference between the optical efficiencies of the two becomes more and more significant as the concentration ratio increases.

[0024] In the technical solution, by clearly knowing the changes of the receiving half-angle and optical efficiency of the truncated CHC and the original CHC under different concentration ratios and solar incident angles, the influence of the design method on the performance of the concentrator can be systematically evaluated. For example, it is known that the receiving half-angles of the two types of concentrators generally decrease as the concentration ratio gradually increases, which provides a basis for judging the light collection ability of the concentrator under different concentration requirements. It is known that the receiving half-angle of the truncated CHC is smaller than that of the original CHC, and the difference increases significantly as the concentration ratio increases, and the optical efficiency of the truncated CHC is higher than that of the original CHC, and the difference also increases significantly as the concentration ratio increases, which can clearly understand the specific role of the truncation design in improving the performance of the concentrator. Through comparison with the original CHC, the advantages of the truncated CHC are highlighted. In terms of receiving half-angle, the truncated CHC is smaller, which means that it can more effectively collect light and reduce the loss of light; in terms of optical efficiency, the truncated CHC is higher, which indicates that it has better performance in converting light into usable energy or signal. In practical applications, different scenarios have different requirements for concentration ratio and solar incident angle. By understanding the performance difference between the two types of concentrators under different concentration ratios and solar incident angles, the appropriate type of concentrator can be selected according to the specific scenario. For example, in a scenario that requires high concentration ratio and the solar incident angle is relatively vertical, the truncated CHC is a better choice.

[0025] The application further provides that the optical efficiency and irradiance non-uniformity of the two types of concentrators under different solar incident angles further include data of optical efficiency, irradiance distribution, and number of reflected light rays of the solar irradiation receiving surface obtained by simulation, to verify the improvement effect of the design method on the optical efficiency and irradiance uniformity.

[0026] In the technical solution, by obtaining the data of optical efficiency, irradiance distribution, and number of reflected light rays of the solar irradiation receiving surface through simulation, the improvement effect of the design method on the optical efficiency and irradiance uniformity can be comprehensively and quantitatively verified from multiple key dimensions. The optical efficiency data directly reflects the ability of the concentrator to convert solar radiation energy into usable energy, the irradiance distribution data shows the uniformity of the light distribution on the receiving surface, and the number of reflected light rays data reflects the reflection of light inside the concentrator. These data confirm each other and provide a solid basis for evaluating the effectiveness of the design method.

[0027] The application further provides that the verification of the improvement effect of the design method on the optical efficiency and irradiance uniformity includes that 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.

[0028] In the technical solution, through comparison with the original CHC, the advantages of the truncated CHC in optical efficiency and irradiation uniformity are clearly shown. In the case of a concentration ratio of 1.5, the optical efficiency of the truncated CHC is higher, which means that it can more effectively convert solar radiation energy into available energy; the non-uniformity is smaller, which indicates that the distribution of light on the solar radiation receiving surface is more uniform, which can improve the stability and consistency of energy collection.

[0029] The application is further provided as follows: the improvement effect of the verification design method on optical efficiency and irradiation uniformity further includes: in the case of a concentration ratio of 2.25 and a small incident angle, the proportion of 2 or more reflections of the original CHC is greater than that of 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 a part of light overflow, and the overflow light increases at the same time as the incident angle increases.

[0030] In the technical solution, by comparing the proportions of 2 or more reflections of the original CHC and the truncated CHC, the advantages of the truncated CHC in reducing multiple reflections are more specifically shown.

[0031] The application has the following beneficial effects: (1) reducing the number of reflections of light in the concentrator, improving the optical efficiency of the concentrator, and maintaining good irradiation uniformity; (2) in step S1, according to the light tracing results of the CHC hyperboloid, the part of the hyperboloid that causes multiple reflections and the part of the hyperboloid that only has single reflection can be accurately determined, based on which, the part of the hyperboloid that causes multiple reflections is directly truncated in step S2, thus avoiding multiple reflections of light in this part from the root, effectively reducing the number of reflections of light in the concentrator, making the light propagation path more concise and efficient, in step S3, the critical point N of single reflection and multiple reflection is accurately found by drawing the original CHC schematic diagram, when the light is irradiated from the K point in the direction parallel to the y-axis and reflected by the mirror to the point N, the angle between KN and the y-axis is the maximum receiving half-angle, and the original CHC is truncated along the MN dotted line, thus obtaining a concentrator that only has single reflection, which further limits the reflection area of light in the concentrator and ensures that light mainly undergoes single reflection, greatly reducing the possibility of multiple reflections, in step S4, the parameters of the truncated concentrator are solved according to the distance from the point N to the y-axis and the concentration ratio CR, which covers the hyperbolic equation before truncation, the hyperbolic equation after truncation, the equation based on the principle of similar 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 in the concentrator more efficient, thus improving the optical efficiency of the concentrator, in step S5, the original CHC and the truncated CHC under the same concentration ratio are respectively constructed into 3D physical models and imported into the TracePro software for analysis. Attached Figure Description

[0032] Figure 1 This is a flowchart of the design method in this invention;

[0033] Figure 2 This is the design drawing of the truncated CHC geometric line in this invention;

[0034] Figure 3 This is the truncated CHC design diagram in this invention;

[0035] Figure 4 This is a comparison diagram of the original CHC and the truncated CHC under different concentration ratios in this invention. Detailed Implementation

[0036] 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.

[0037] 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:

[0038] 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;

[0039] S2, remove the hyperboloid portion that causes multiple reflections and eliminate multiple reflections;

[0040] 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.

[0041] 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 principle of triangle similarity, and the concentration ratio equation of the truncated concentrator. The parameters of the truncated concentrator are obtained by solving multiple equations.

[0042] S5, the same kind of light concentration ratio under the original CHC and truncated CHC are constructed 3D physical model respectively, the 3D model is imported into TracePro software, input the same light outlet width, solar radiation receiving surface, input different concentrator height, concentrator mirror area, arc length, output the optical efficiency and irradiation non-uniformity of two concentrators under different solar incident angle.

[0043] In the technical solution, in step S1, the light ray tracing result of the CHC hyperboloid can accurately determine the hyperboloid part causing multiple reflections and the hyperboloid part only having single reflection. Based on this, step S2 directly cuts off the hyperboloid part causing multiple reflections, which avoids multiple reflections of light rays in this part from the root, effectively reduces the number of reflections of light rays in the concentrator, and makes the light ray propagation path more concise and efficient. Step S3 accurately finds the critical point N of single reflection and multiple reflection by drawing the original CHC schematic diagram. When the light ray is irradiated from point K in the direction parallel to the y-axis and reflected by the mirror to point N, the angle between KN and the y-axis is the maximum receiving half-angle. According to the maximum receiving half-angle, the original CHC is truncated along the MN dotted line to obtain a concentrator only having single reflection, which further limits the reflection area of light rays in the concentrator and ensures that the light rays mainly have single reflection, greatly reducing the possibility of multiple reflections. Step S4 solves the parameters of the truncated concentrator according to the distance from point N to the y-axis and the concentration ratio CR, which covers the equation of the un-truncated hyperbola, the equation of the truncated hyperbola, the equation based on the similarity principle of triangles, and the equation of the concentration ratio of the truncated concentrator. By solving these equations, the optimal parameters of the truncated concentrator can be obtained, which makes the structure of the concentrator more reasonable and the propagation and focusing of light rays in the concentrator more efficient, thereby improving the optical efficiency of the concentrator. Step S5 constructs 3D physical models of the original CHC and the truncated CHC under the same concentration ratio, and imports them into the TracePro software for analysis. Under the same light outlet width and solar radiation receiving surface, different concentrator heights, concentrator mirror areas, and arc lengths are input, and the optical efficiency of the two concentrators under different solar incident angles is output. The results show that as the concentration ratio increases, the receiving half-angle of the truncated CHC is smaller than that of the original CHC, and the difference between the two becomes more significant as the concentration ratio increases. When the sun is vertically incident, the optical efficiency of the truncated CHC is greater than that of the original CHC, and the difference also becomes more significant as the concentration ratio increases, which fully proves that the design method can effectively improve the optical efficiency of the concentrator. The design idea of reducing the number of reflections and optimizing the parameters enables the light rays to be more uniformly distributed on the solar radiation receiving surface, thereby maintaining good irradiation uniformity.

[0044] Specifically, the calculation formula of the maximum receiving half-angle is:

[0045] ;

[0046] wherein θ is the included angle between KN and the y-axis, is the maximum receiving half-angle, and C is the concentration ratio.

[0047] Further, the truncated concentrator parameters include a half-transverse axis length a, a distance difference between point L and point N to the x-axis a distance difference between point N and point P to the x-axis a focal point distance from the center c.

[0048] Specifically, the un-truncated hyperbolic equation is ;

[0049] The truncated hyperbolic equation is ;

[0050] The equation based on the triangle similarity principle is ;

[0051] The concentration ratio equation of the truncated concentrator is ;

[0052] wherein a is the half-transverse axis length, is the distance from point N to the y-axis, and c is the focal point distance from the center, is the distance difference between point L and point N to the x-axis, is the distance difference between point N and point P to the x-axis, and CR is the concentration ratio of the truncated concentrator.

[0053] Specifically, referring to Figure 4 , the output optical efficiency and irradiance non-uniformity of the two concentrators under different solar incident angles include:

[0054] When the concentration ratio gradually increases, the receiving half-angles of the truncated CHC and the original CHC generally decrease, the receiving half-angle of the truncated CHC is smaller than that of the original CHC, and the difference between the receiving half-angles of the two becomes more and more significant as the concentration ratio increases.

[0055] When the concentration ratio gradually increases, the optical efficiency of the truncated CHC and the original CHC generally decreases, the optical efficiency of the truncated CHC is greater than that of the original CHC, and the difference between the optical efficiencies of the two becomes more and more significant as the concentration ratio increases.

[0056] In the technical solution, by clearly understanding the changes of the receiving half-angle and optical efficiency of the truncated CHC and the original CHC under different concentration ratios and solar incident angles, the influence of the design method on the performance of the concentrator can be systematically evaluated. For example, it is known that as the concentration ratio gradually increases, the receiving half-angles of the two concentrators generally decrease, which provides a basis for judging the light collection ability of the concentrator under different concentration requirements. It is known that the receiving half-angle of the truncated CHC is smaller than that of the original CHC, and the difference increases significantly as the concentration ratio increases, and the optical efficiency of the truncated CHC is higher than that of the original CHC, and the difference also increases significantly as the concentration ratio increases, which can clearly understand the specific role of the truncation design in improving the performance of the concentrator. Through comparison with the original CHC, the advantages of the truncated CHC are highlighted. In terms of receiving half-angle, the truncated CHC is smaller, which means it can more effectively collect light and reduce the loss of light; in terms of optical efficiency, the truncated CHC is higher, indicating that it has better performance in converting light into usable energy or signal. In practical applications, different scenarios have different requirements for concentration ratio and solar incident angle. By understanding the performance difference between the two types of concentrators under different concentration ratios and solar incident angles, the appropriate type of concentrator can be selected according to the specific scenario. For example, in a scenario that requires high concentration ratio and the solar incident angle is relatively vertical, the truncated CHC is a better choice.

[0057] Specifically, the output of the optical efficiency and irradiance non-uniformity of the two concentrators under different solar incident angles also includes obtaining data of optical efficiency, irradiance distribution, and number of reflected light rays on the solar irradiation receiving surface through simulation to verify the improvement effect of the design method on optical efficiency and irradiance uniformity. By obtaining data of optical efficiency, irradiance distribution, and number of reflected light rays on the solar irradiation receiving surface through simulation, the improvement effect of the design method on optical efficiency and irradiance uniformity can be comprehensively and quantitatively verified from multiple key dimensions. The optical efficiency data directly reflects the ability of the concentrator to convert solar radiation energy into usable energy, the irradiance distribution data shows the uniformity of light distribution on the receiving surface, and the number of reflected light rays data reflects the reflection of light inside the concentrator. These data confirm each other and provide a solid basis for evaluating the effectiveness of the design method.

[0058] Specifically, the verification of the improvement effect of the design method on optical efficiency and irradiance uniformity includes that 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. Through comparison with the original CHC, the advantages of the truncated CHC in optical efficiency and irradiance uniformity are clearly demonstrated. In the case of a concentration ratio of 1.5, the optical efficiency of the truncated CHC is higher, which means it can more effectively convert solar radiation energy into usable energy; the non-uniformity is smaller, indicating that the light distribution on the solar irradiation receiving surface is more uniform, which can improve the stability and consistency of energy collection.

[0059] Specifically, the improvement effect of the verification design method on optical efficiency and irradiation uniformity also includes: in the case of a condensing ratio of 2.25 and a small incident angle, the proportion of the original CHC existing 2 times of reflection or more is greater than that of the truncated CHC, and the optical efficiency of the original CHC is lower than that of the truncated CHC. The original CHC and the truncated CHC both exist in the case of partial light overflow, and with the increase of the incident angle, the overflow light also increases. By comparing the proportion of the original CHC and the truncated CHC existing 2 times of reflection or more, the advantage of the truncated CHC in reducing multiple reflections is more specifically demonstrated.

[0060] The above embodiments are only used for further description of the present application, and cannot be understood as limitation on the protection scope of the present application. The skilled in the art can make some non-essential improvements and adjustments to the present application according to the content of the above application, which all fall within the protection scope of the present application.

Claims

1. A method for optimizing a compound hyperboloidal condenser with multiple reflections cancellation, characterized in that, The method comprises the following steps: S1, determining the hyperboloid part causing multiple reflections and the hyperboloid part only having single reflection according to the ray tracing result of the CHC hyperboloid; S2, cutting off the hyperboloid part causing multiple reflections and eliminating the multiple reflections; S3, drawing an original CHC schematic diagram with the x-axis as the horizontal coordinate and the y-axis as the vertical coordinate, determining the critical point N and the critical point M where single reflection and multiple reflection occur, the critical point N and the critical point M being symmetrical to each other, wherein when a light ray is irradiated by the K point in a direction parallel to the y-axis and is single-reflected to the point N by the reflector, the included angle KN and the y-axis is the maximum acceptance half-angle; the original CHC is cut off along the MN virtual line to obtain a light collector only having single reflection, and a cut-off CHC is obtained; S4, distance from point N to y-axis a concentration ratio CR, the truncated concentrator parameters are solved by simultaneously solving a plurality of equations; the plurality of equations include an un-truncated hyperbolic equation, a truncated hyperbolic equation, an equation based on a triangle similarity principle, and a concentration ratio equation of the truncated concentrator, and the truncated concentrator parameters are obtained by solving the plurality of equations; S5, constructing 3D physical models of the original CHC and the cut-off CHC under the same concentration ratio, importing the 3D models into TracePro software, inputting the same light outlet width, solar radiation receiving surface, inputting different light collector heights, light collector mirror areas and arc lengths, and outputting the optical efficiency and the irradiation non-uniformity of the two light collectors under different solar incident angles; The calculation formula of the maximum acceptance half-angle is: ； Wherein, θ is the included angle KN and the y-axis, and C is the concentration ratio. The truncated concentrator parameters include a transverse semi-axis length a, a difference between distances of points L and N to the x-axis a difference between distances of points N and P to the x-axis a focal distance from the center c; The untruncated hyperbolic equation is ; The truncated hyperbolic equation is ; The equation based on the principle of triangle similarity is ; The concentration ratio equation of the truncated concentrator is ; where a is the horizontal half-axis length, is the distance from point N to the y-axis, and c is the distance from the focal point to the center, is the distance difference between point L and point N to the x-axis, is the distance difference between point N and point P to the x-axis, and CR is the concentration ratio of the truncated condenser.

2. The method of claim 1, wherein the method further comprises: The output of the optical efficiency and the irradiation non-uniformity of the two light collectors under different solar incident angles comprises: When the concentration ratio gradually increases, the acceptance half-angles of the cut-off CHC and the original CHC generally decrease, the acceptance half-angle of the cut-off CHC is smaller than that of the original CHC, and the difference between the acceptance half-angles of the two becomes more and more significant as the concentration ratio increases; When the concentration ratio gradually increases, the optical efficiency of the cut-off CHC and the original CHC generally decreases, the optical efficiency of the cut-off CHC is greater than that of the original CHC, and the difference between the optical efficiencies of the two becomes more and more significant as the concentration ratio increases.

3. The method of claim 2, wherein the method further comprises: The output of the optical efficiency and the irradiation non-uniformity of the two light collectors under different solar incident angles further comprises obtaining the data of the optical efficiency, the irradiation distribution and the number of reflected light rays of the solar radiation receiving surface through simulation to verify the improvement effect of the design method on the optical efficiency and the irradiation uniformity.

4. The optimization method of the multiple-reflection-eliminated compound hyperboloid light collector according to claim 3, wherein The verification of the improvement effect of the design method on the optical efficiency and the irradiation uniformity comprises: when the concentration ratio is 1.5, the optical efficiency of the cut-off CHC under different incident angles is greater than that of the original CHC, and the non-uniformity is smaller than that of the original CHC.

5. The method of claim 4, wherein the method further comprises: The verification of the improvement effect of the design method on the optical efficiency and the irradiation uniformity further comprises: under the condition of a concentration ratio of 2.25 and a small incident angle, the proportion of the original CHC having two or more reflections is greater than that of the cut-off CHC, and the optical efficiency of the original CHC is lower than that of the cut-off CHC; both the original CHC and the cut-off CHC have a part of light overflow, and the overflow light increases as the incident angle increases.

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