A design method, system, device and storage medium of a conical cavity receiver

Abstract

The application provides a design method, system, device and storage medium of a conical cavity receiver, and belongs to the field of concentrating solar collector design and manufacturing. The method comprises the following steps: determining the focal spot diameter of a condenser at a focal plane through actual measurement, and setting the bottom diameter of the receiver based on the focal spot diameter; based on the parabolic equation of the condenser, determining a critical light ray incident to the edge of the receiver by using the geometric optics principle, and calculating the reflection path of the critical light ray; modeling the axial cross section of the conical cavity receiver as an isosceles trapezoid, taking the lower bottom side as a geometric constraint and equal in length to the focal spot diameter, and taking the intersection point of the reflected light ray and the upper bottom side and the waist of the isosceles trapezoid as a condition, and solving the optimal height and the cone angle of the receiver by simultaneously solving equations. The application realizes the accurate calculation of the size of the receiver from the theory, significantly improves the light-heat conversion efficiency and the manufacturing precision, and solves the problems of low efficiency and insufficient precision existing in the existing simulation and trial-and-error method.

Description

Technical Field

[0001] This invention belongs to the field of concentrated solar collector design and manufacturing, specifically relating to a design method, system, device and storage medium for a cone-shaped hole receiver. Background Technology

[0002] To achieve the global goal of carbon neutrality, the global energy sector is required to transition from fossil fuels to renewable energy. Solar energy, due to its cleanliness, inexhaustibility, and wide distribution, is considered one of the most promising renewable energy sources. Solar thermal conversion, as one of the main methods of solar energy utilization, boasts high energy conversion efficiency. Parabolic dish concentrators can achieve highly efficient solar thermal conversion and have a wide range of applications due to their broad operating temperature range (400–700℃). The core component of a parabolic dish concentrator is the receiver; among various receiver types, the cone-shaped hole receiver exhibits superior solar thermal conversion capabilities.

[0003] Currently, research on cone-shaped hole receivers mainly focuses on analyzing the impact of structural parameters (such as cone angle, height, and bottom diameter) on photothermal conversion performance, and their design methods primarily rely on numerical simulation. Numerical simulation methods typically employ coupled Monte Carlo ray tracing and computational fluid dynamics simulations. This method requires establishing a complex three-dimensional photothermal coupled model, performing fine mesh generation, and conducting numerous iterative calculations, which is time-consuming and computationally resource-intensive. More importantly, the simulation itself cannot directly provide optimal design parameters; designers still need to pre-assume a set of dimensions for simulation, and then manually adjust and recalculate based on the results, essentially remaining a trial-and-error process in a virtual environment. The accuracy of the results strongly depends on the precision of the model settings (such as specular reflectivity, solar shape model, etc.), and there is a risk of introducing errors due to model simplification. Furthermore, the numerical simulation-based design method fails to consider the complete reception of solar radiation, leading to the loss and waste of some solar radiation, thereby reducing the receiver's photothermal conversion capability. Summary of the Invention

[0004] To address the aforementioned problems, this invention provides a design method, system, device, and storage medium for a cone-shaped hole receiver.

[0005] To achieve the above objectives, the present invention provides a design method for a cone-shaped hole receiver, comprising: Collect the focal length and diameter parameters of the target parabolic disc condenser.

[0006] Determine the focal position and optical axis direction of the concentrator, pre-set a measurement target surface that moves along the optical axis direction, move the measurement target surface to the focal position of the concentrator, and measure the minimum spot diameter of sunlight converging on the target surface at this time; establish a two-dimensional parabolic curve based on the focal length and diameter parameters of the parabolic disc concentrator; pre-set an incident ray parallel to the optical axis direction that just passes through the edge of the minimum spot at the focal point, determine the intersection point of the incident ray and the two-dimensional parabolic curve, and obtain the reflected ray of the incident ray at the intersection point.

[0007] The axial section of the cone-shaped hole receiver is represented as an isosceles trapezoid in two-dimensional coordinates. The length of the lower base of the isosceles trapezoid is determined by the minimum spot diameter. With the constraint that the intersection of the upper base of the isosceles trapezoid and one of its legs must coincide with the reflected ray, the height and cone angle of the isosceles trapezoid are solved by combining the equation of the reflected ray in two-dimensional coordinates. The design height and design cone angle of the cone-shaped hole receiver are determined by the height and cone angle.

[0008] Preferably, the measurement of the minimum spot diameter at which sunlight converges on the target surface at this time specifically includes: installing a concentrator on a solar tracking system and precisely aligning the concentrator with the sun at a certain moment, and measuring the spot diameter by placing a measuring target surface at the focal point to obtain the minimum spot diameter.

[0009] Preferably, the length of the lower base of the isosceles trapezoid is determined by the minimum spot diameter. Specifically, the axial section of the cone-shaped hole receiver is represented as an isosceles trapezoid in two-dimensional coordinates, and the length of the base of the isosceles trapezoid is equal to the minimum spot diameter.

[0010] Preferably, the vertex of the two-dimensional parabola is the origin of the two-dimensional rectangular coordinate system, and the direction of the optical axis coincides with the positive y-axis direction of the two-dimensional rectangular coordinate system.

[0011] Preferably, determining the intersection point of the incident ray and the two-dimensional parabola specifically includes: taking half the diameter of the light spot as the intersection point coordinates on the x-axis, substituting the x-axis coordinates into the parabola equation to obtain the intersection point coordinates on the y-axis, and determining the coordinates of the intersection point using the x-axis coordinates and the y-axis coordinates.

[0012] Preferably, the height and cone angle of the isosceles trapezoid are solved by taking the intersection of the upper base and one of the legs of the isosceles trapezoid as a constraint condition, and combining the equation of the reflected ray in two-dimensional coordinates. Specifically, this includes: establishing the trigonometric function relationship between the length of the lower base, the height, and the vertex angle of the isosceles trapezoid; establishing the intersection condition by using the intersection of the upper base and one of the legs of the isosceles trapezoid with the reflected ray; and solving the height and cone angle of the isosceles trapezoid by using the trigonometric function relationship and the intersection condition to solve a system of equations.

[0013] Preferably, the method further includes: using the design height and design cone angle, processing a manufacturing fixture with a spiral guide groove on the outer surface, winding the metal tube along the spiral guide groove of the fixture to form a conical spiral tube structure, fixing the coiled structure to obtain the conical cavity receiver.

[0014] The present invention also provides a design system for a cone-shaped hole receiver, comprising: The data acquisition module is used to collect the focal length and diameter parameters of the target parabolic disc condenser.

[0015] The calculation module is used to determine the focal position and optical axis direction of the concentrator, preset a measurement target surface that moves along the optical axis direction, move the measurement target surface to the focal position of the concentrator, and measure the minimum spot diameter of sunlight converging on the target surface at this time; establish a two-dimensional parabolic curve based on the focal length and diameter parameters of the parabolic disc concentrator; preset an incident ray that is parallel to the optical axis direction and just passes through the edge of the minimum spot at the focal point, determine the intersection point of the incident ray and the two-dimensional parabolic curve, and obtain the reflected ray of the incident ray at the intersection point.

[0016] The design module is used to represent the axial section of the cone-shaped hole receiver as an isosceles trapezoid in two-dimensional coordinates. The length of the lower base of the isosceles trapezoid is determined by the minimum spot diameter. With the constraint that the intersection of the upper base of the isosceles trapezoid and one of its legs must coincide with the reflected ray, the height and cone angle of the isosceles trapezoid are solved by combining the linear equation of the reflected ray in two-dimensional coordinates. The design height and design cone angle of the cone-shaped hole receiver are determined by the height and cone angle.

[0017] The present invention also provides a computer device, including a memory, a processor, and a computer program stored in the memory, wherein the processor executes the computer program to implement the steps of any one of the design methods for the cone-shaped hole receiver.

[0018] The present invention also provides a computer-readable storage medium storing a computer program that, when loaded by a processor, is capable of executing any of the steps in the design method of the cone-shaped hole receiver.

[0019] The design method for a cone-shaped hole receiver provided by this invention has the following beneficial effects: This invention proposes an optical constraint criterion that the critical ray is tangent to the cone-shaped hole receiver. Starting from the first principles of optics, it transforms the engineering objective into a clear geometric condition. By establishing a closed mathematical model, it outputs the theoretically optimal size that can capture 100% of the light energy in one go, fundamentally ensuring the theoretical accuracy and optimality of the design and eliminating the uncertainty of experience or simulation. This invention simplifies the complex three-dimensional photothermal coupling model into a two-dimensional calculation based on analytical geometry. Once the basic parameters are obtained, the optimal solution can be quickly obtained by solving equations simultaneously, greatly shortening the design cycle and reducing resource consumption. The uniquely determined design parameters output by this invention can be directly used as the processing basis for subsequent high-precision manufacturing fixtures, enabling the designed receiver to completely capture all reflected light rays into holes. This ensures high-fidelity conversion from digital model to physical product, guarantees the consistency and stability of receiver performance, and systematically solves the problems of low efficiency and insufficient accuracy in existing design methods. Attached Figure Description

[0020] To more clearly illustrate the embodiments and design schemes of the present invention, the accompanying drawings required for this embodiment will be briefly described below. The drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a flowchart illustrating a design method for a cone-shaped hole receiver according to an embodiment of the present invention; Figure 2 This is a flowchart illustrating the design and manufacturing process of the cone-shaped hole receiver according to an embodiment of the present invention. Figure 3 This is a schematic diagram of a cone-shaped hole receiver according to an embodiment of the present invention; Figure 3 (a) is for displaying the base diameter. Figure 3 Figure (b) shows the height, and Figure 3 (c) shows the cone angle; Figure 4 This is a two-dimensional theoretical optical path diagram of the parabolic dish solar collector according to an embodiment of the present invention; Figure 5 The two-dimensional parabolic curve and reflected light ray in an embodiment of the present invention; Figure 6 This is a mechanical tooling diagram of a cone-shaped hole receiver according to an embodiment of the present invention; Figure 7 A two-dimensional diagram showing the dimensional parameters of the cone-shaped hole receiver in an embodiment of the present invention; Figure 8 This is a physical image of the cone-shaped hole receiver according to an embodiment of the present invention; Figure 9This is a test diagram of the actual working condition of the parabolic dish solar collector according to an embodiment of the present invention; Figure 10 This is a performance comparison diagram of the cone-shaped hole receiver using the theoretical optical path method according to an embodiment of the present invention. Detailed Implementation

[0022] To enable those skilled in the art to better understand and implement the technical solutions of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. The following embodiments are only used to more clearly illustrate the technical solutions of the present invention and should not be construed as limiting the scope of protection of the present invention.

[0023] This invention addresses the lack of theoretical guidance in the design of cone-shaped hole receivers by proposing a dimensional design method for cone-shaped hole receivers based on the theoretical optical path method. Furthermore, it addresses the difficulty in manufacturing cone-shaped hole receivers by proposing an efficient manufacturing method based on mechanical tooling.

[0024] The design and manufacturing process of the cone-shaped hole receiver is as follows: Figure 2 As shown, to achieve efficient solar concentrating reception, this invention follows a systematic process of design-simulation-manufacturing to conduct research on hole receivers. First, a two-dimensional geometric model of the parabolic disk concentrator is established in a Cartesian coordinate system, and the equation for reflected rays is constructed based on the differential method. The characteristics of the concentrating spot are accurately determined through optical path analysis. Then, based on the spot distribution, the bottom diameter of the hole receiver is determined, and its height and cone angle, among other key structural parameters, are calculated. On this basis, a special tooling for the hole receiver, strictly matching the design parameters, is fabricated, ultimately completing the precision manufacturing of the receiver. This method organically combines optical modeling, structural design, and process implementation, providing a complete technical route for the performance optimization and reliable fabrication of hole receivers.

[0025] Based on this, the present invention provides a design method for a cone-shaped hole receiver, specifically as follows: Figure 1 As shown, it includes: S1. Collect the focal length and diameter parameters of the target parabolic disc condenser.

[0026] Collect the focal length and diameter parameters of the parabolic disc condenser, and then, based on the theoretical optical path diagram, as shown below. Figure 4 As shown, if all reflected light rays are to be received exactly, it is only necessary to ensure that the incident sunlight along the maximum diameter of the receiver is reflected by the concentrator and falls onto the receiver. This critical ray can be abstracted as a straight line, which determines the height parameters and corresponding cone angle parameters of the receiver.

[0027] S2. Determine the focal position and optical axis direction of the concentrator. Pre-set a measurement target surface that moves along the optical axis direction. Move the measurement target surface to the focal position of the concentrator and measure the minimum spot diameter of sunlight converging on the target surface at this time. Establish a two-dimensional parabolic curve based on the focal length and diameter parameters of the parabolic disc concentrator. Pre-set an incident ray that is parallel to the optical axis direction and just passes through the edge of the minimum spot at the focal point. Determine the intersection point of the incident ray and the two-dimensional parabolic curve, and obtain the reflected ray at the intersection point.

[0028] Based on theoretical optical path analysis, a two-dimensional model of the condenser is established in a rectangular coordinate system, where the parabolic equation representing the parabolic disc condenser is: y = x 2 / 2000 (x∈[-675,675]), the straight line with equation x=22.5 represents the critical incident solar radiation outside the receiver. First, the mathematical equation of the reflected ray corresponding to this incident ray is obtained as: y=-22.211x+500. After obtaining the equation of the reflected ray, the cone angle corresponding to the receiver at any height can be further calculated. In this embodiment, the receiver height is selected as 54mm, and the cone angle of the cone-shaped hole receiver is calculated to be 41° according to the above derived equation.

[0029] Assume the radius of the parabolic dish solar concentrator is R, the focal length (distance from the focal point to the vertex) is f, and the radius of the light spot at the focal point is r. The equation of the parabola in a rectangular coordinate system is y = x. 2 / 4f, x∈[-R,R], the actual region receiving sunlight is x∈[-R,-r]∪[r,R]. The reflected ray after the incident ray at x=r or x=-r determines the size parameters of the cone-shaped hole receiver.

[0030] S3. Represent the axial section of the cone-shaped hole receiver as an isosceles trapezoid in two-dimensional coordinates. The length of the lower base of the isosceles trapezoid is determined by the minimum spot diameter. With the constraint that the intersection of the upper base of the isosceles trapezoid and one of its legs must coincide with the reflected ray, and combined with the linear equation of the reflected ray in two-dimensional coordinates, solve for the height and cone angle of the isosceles trapezoid. Determine the design height and design cone angle of the cone-shaped hole receiver from the height and cone angle.

[0031] The axial section of the cone-shaped hole receiver is transformed into an isosceles trapezoid. The main dimensional parameters of the cone-shaped hole receiver are the base diameter, height, and cone angle (apex angle), such as... Figure 3 (a) Figure 3 (b) and Figure 3 As shown in (c), the cone angle is designed as follows: Figure 3 As shown in (c).

[0032] The parabolic dish solar concentrator used in this embodiment has a diameter of 1350mm (corresponding to a radius R=675mm), a focal length f=500mm, an edge angle of 66.8°, and a solar radiation reflectivity of 90%. First, the concentrator is installed on a solar tracking platform, and a 60mm diameter graduated 316 stainless steel disc is placed at its focal plane as a target surface. The platform angle is adjusted so that the concentrator is completely facing the sun. At this time, the minimum spot diameter on the stainless steel disc is measured to be 45mm (corresponding to a spot radius r=22.5mm). To ensure that all the collected solar radiation enters the receiver, the bottom diameter of the receiver (the length of the lower base of the isosceles trapezoid) is set to 45mm.

[0033] Based on the above spot parameters, the critical receiving point and reflected ray are derived using the incident ray at x=r. The incident ray is parallel to the optical axis and passes exactly through the edge of the minimum spot diameter. Figure 6 As shown, the calculation is performed using the incident ray at x=r. When the incident ray at x=r strikes the critical point A, it is reflected by the concentrator and passes through the focal point F. The coordinates of A are (r, r). 2 / 4f). The reflected light can be obtained based on mathematical relationships. ;

[0034] The receiver can be abstracted as an isosceles trapezoid, the length of which is determined by the minimum spot diameter. The lower base is located at the focal point F, and the intersection of its leg and upper base passes through the line f(x) containing the reflected rays, thus receiving all the reflected rays. Based on this geometric relationship, the relationship between the receiver's height (H) and apex angle (α) can be derived as follows:

[0035] Based on the above formula, parameter verification was performed: taking the receiver height H=54mm, substituting the concentrator parameters (f=500mm, r=22.5mm), the corresponding cone angle α≈41° was obtained. Under these parameters, the receiver can fully receive all reflected light while simultaneously meeting the heat exchange time requirements of the gas inside.

[0036] like Figure 5 As shown, based on the parameters of the cone-shaped hole receiver, in order to ensure that the gas has sufficient heat exchange time in the receiver, this embodiment selects a commercially available 316 stainless steel seamless tube with an outer diameter of 3.2 mm as the receiver coil (316 stainless steel has a melting point as high as 1375℃ and has good working stability when used in concentrated solar receivers).

[0037] This invention employs a manufacturing method based on mechanical tooling to manufacture a conical hole receiver. This method ensures high precision and high efficiency in receiver manufacturing. An aluminum rod is selected as the base material for the mechanical tooling. First, the diameter of the aluminum rod is machined to 45mm on a lathe (matching the receiver's bottom diameter). Then, a conical surface is machined using a rotating slide method: the 45mm diameter aluminum rod is mounted on the lathe, and the angle of the lathe's slide is adjusted to match the semi-cone angle (20.5°) of the corresponding conical hole solar receiver. Then, a threading tool is used to machine an external thread with a pitch of 3.2mm (to ensure seamless connections between coils, the thread diameter matches the outer diameter of the receiver's stainless steel tube). This completes the manufacturing of the dedicated tooling for the conical hole receiver. The form of the dedicated tooling for the conical hole receiver is as follows: Figure 7 As shown. After the receiver's specialized mechanical fixture is stably clamped onto the lathe, the stainless steel tube is fixed, and the fixture is rotated at a suitable speed, causing the stainless steel tube to coil along the external thread groove, thus completing the machining of the conical cavity receiver. Figure 8 As shown, to ensure that the coils are tightly joined and do not deform, the two ends of the long stainless steel sheet are welded to the top and bottom of the coil, respectively.

[0038] After completing the design and fabrication of the cone-shaped hole receiver, the parabolic dish concentrator and the fabricated receiver from this embodiment are mounted on a dual-axis solar tracking platform for actual solar thermal conversion testing. The solar thermal testing in this step, such as... Figure 9 As shown, the heat exchange medium used is dry air with a volumetric flow rate of 1 L / min, and the solar radiation intensity is approximately 800 W / m². 2 When the entire system reaches steady state, the outlet air temperature of the cone-shaped hole receiver is 700℃.

[0039] To confirm the superiority of the method of the present invention, an embodiment of the present invention is described using a 20° angle as an example. In this embodiment, a conical hole receiver with a cone angle of 20° was fabricated (the bottom diameter, height, and tube diameter parameters are consistent with the receiver parameters designed according to the theoretical optical path method in this embodiment) for photothermal conversion performance comparison. Figure 10 As shown, the test conditions were: air flow rate of 1 L / min and solar radiation intensity of 748 W / m². 2The results show that the receiver designed using the theoretical optical path method can heat the air to a higher temperature under the same conditions, indicating that the receiver designed using the theoretical optical path method has superior photothermal conversion performance. This is because the receiver designed using the theoretical optical path method can receive all the concentrated solar radiation. However, when the cone angle is changed to 20°, the total amount of solar radiation theoretically received by the receiver decreases, thus exhibiting weaker photothermal conversion performance. Therefore, the cone-shaped hole receiver design method proposed in this invention, based on the theoretical optical path and combined with geometric optics principles and measured light spot parameters, can achieve complete reception of concentrated solar radiation, ensuring that the theoretical light energy capture efficiency reaches its optimal level. Through testing and verification under actual solar radiation conditions, the receiver designed using this method exhibits excellent photothermal conversion performance, combining the rigor of theoretical guidance with the high efficiency of engineering applications, and has significant scientific significance and practical value.

[0040] This invention, starting from fundamental theory, designs a cone-shaped hole receiver based on a theoretical optical path method, filling a gap in current cone-shaped hole receiver design methods. Actual testing further demonstrates that the receiver designed based on the theoretical optical path method exhibits superior photothermal conversion performance. The concentrating solar cone-shaped hole receiver design and manufacturing method provided by this invention represents a fundamental shift in design logic from empirical trial and error to theoretical calculation. Existing technologies, whether relying on numerical simulation or physical experiments, are essentially parameter trial and error processes, resulting in uncertainties and local optimization. This invention, based on rigorous optical laws and geometric principles, establishes the core constraint of the critical ray intersecting with the top of the receiver's inner wall, transforming the receiver design problem into a precisely solvable mathematical model. This method directly outputs the theoretically optimal geometric dimensions (height H and cone angle α) that can capture and concentrate solar radiation 100%, ensuring the theoretical optimality, determinism, and repeatability of the design results, completely eliminating performance fluctuations and design blind spots caused by reliance on human experience.

[0041] This invention achieves a leap in efficiency from time-consuming simulation to rapid analysis. Traditional numerical simulation methods require building complex models and performing numerous iterative calculations, with a single analysis often taking hours or even days. Furthermore, the process is often like a black box, making it difficult to elucidate the intrinsic relationship between parameters and performance. In contrast, the analytical geometric calculations relied upon in this invention can be completed in an extremely short time, resulting in an order-of-magnitude improvement in design efficiency. Simultaneously, the entire calculation process has clear physical meaning and logical transparency, not only providing the optimal solution but also revealing the optical mechanism behind why this solution is optimal, thus possessing stronger design guidance and knowledge dissemination value.

[0042] Existing methods often produce parameters that are difficult to reproduce with high precision using conventional processes, leading to a disconnect between design and manufacturing. This invention creatively proposes a dedicated manufacturing fixture and method that seamlessly integrates with the design phase. The optimal cone angle determined in the design is directly used as the machining basis for the fixture. A conical fixture with corresponding spiral guide grooves guides the tubing through coiling and forming, ensuring a high degree of consistency between the product's geometry and the design blueprint. This transforms the receiver from a difficult-to-reproduce handcrafted item into a standard industrial product that can be mass-produced, laying a solid technological foundation for achieving consistent product performance, stability, and engineering applications.

[0043] This invention elevates the development of cone-shaped hole receivers from a skill reliant on experience, simulation, and manual labor to a standardized technology with theoretical optimization, high efficiency, and precise manufacturability, demonstrating outstanding practicality, significant efficiency improvements, and important engineering application value.

[0044] Based on the same inventive concept, this invention also provides a design system for a cone-shaped hole receiver, comprising: The data acquisition module is used to collect the focal length and diameter parameters of the target parabolic disc condenser.

[0045] The calculation module is used to determine the focal position and optical axis direction of the concentrator, preset a measurement target surface that moves along the optical axis direction, move the measurement target surface to the focal position of the concentrator, and measure the minimum spot diameter of sunlight converging on the target surface at this time; establish a two-dimensional parabolic curve based on the focal length and diameter parameters of the parabolic disc concentrator; preset an incident ray that is parallel to the optical axis direction and just passes through the edge of the minimum spot at the focal point, determine the intersection point of the incident ray and the two-dimensional parabolic curve, and obtain the reflected ray of the incident ray at the intersection point.

[0046] The design module is used to represent the axial section of the cone-shaped hole receiver as an isosceles trapezoid in two-dimensional coordinates. The length of the lower base of the isosceles trapezoid is determined by the minimum spot diameter. With the constraint that the intersection of the upper base of the isosceles trapezoid and one of its legs must coincide with the reflected ray, the height and cone angle of the isosceles trapezoid are solved by combining the linear equation of the reflected ray in two-dimensional coordinates. The design height and design cone angle of the cone-shaped hole receiver are determined by the height and cone angle.

[0047] This invention also provides a computer device. At the hardware level, the computer device includes a processor, an internal bus, a network interface, memory, and non-volatile memory, and may also include other hardware required for business operations. The processor reads the corresponding computer program from the non-volatile memory into the memory and then runs it to implement the design method of the cone-shaped hole receiver provided above.

[0048] The present invention also provides a computer-readable storage medium storing a computer program that can be used to execute the design method of the cone-shaped hole receiver provided above.

[0049] For specific limitations on the design method and computational system of the cone-shaped hole receiver, please refer to the limitations on the design method of the cone-shaped hole receiver mentioned above, which will not be repeated here. Each module in the above-mentioned cone-shaped hole receiver design system can be implemented entirely or partially through software, hardware, or a combination thereof. These modules can be embedded in the processor of the computer device in hardware form or independent of it, or they can be stored in the memory of the computer device in software form, so that the processor can call and execute the corresponding operations of each module.

[0050] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as the combination of these technical features does not contradict each other, it should be considered within the scope of this specification. Furthermore, the above embodiments only illustrate several implementation methods of this application, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A design method for a cone-shaped hole receiver, characterized in that, include: Collect the focal length and diameter parameters of the target parabolic disc condenser; Determine the focal position and optical axis direction of the concentrator. Pre-set a measurement target surface that moves along the optical axis direction. Move the measurement target surface to the focal position of the concentrator and measure the minimum spot diameter of sunlight converging on the target surface at this time. Establish a two-dimensional parabolic curve based on the focal length and diameter parameters of the parabolic disc concentrator. Pre-set an incident ray parallel to the optical axis direction that just passes through the edge of the minimum spot at the focal point. Determine the intersection point of the incident ray and the two-dimensional parabolic curve, and obtain the reflected ray at the intersection point. The axial section of the cone-shaped hole receiver is represented as an isosceles trapezoid in two-dimensional coordinates. The length of the lower base of the isosceles trapezoid is determined by the minimum spot diameter. With the constraint that the intersection of the upper base of the isosceles trapezoid and one of its legs must coincide with the reflected ray, the height and cone angle of the isosceles trapezoid are solved by combining the equation of the reflected ray in two-dimensional coordinates. The design height and design cone angle of the cone-shaped hole receiver are determined by the height and cone angle.

2. The design method of a cone-shaped hole receiver according to claim 1, characterized in that, The measurement of the minimum spot diameter at which sunlight converges on the target surface at this time specifically includes: installing a concentrator on a solar tracking system and precisely aligning the concentrator with the sun at a certain moment, and measuring the spot diameter by placing a measuring target surface at the focal point to obtain the minimum spot diameter.

3. The design method of a cone-shaped hole receiver according to claim 1, characterized in that, The length of the lower base of the isosceles trapezoid is determined by the minimum spot diameter. Specifically, the axial section of the cone-shaped hole receiver is represented as an isosceles trapezoid in two-dimensional coordinates, and the length of the base of the isosceles trapezoid is equal to the minimum spot diameter.

4. The design method of a cone-shaped hole receiver according to claim 1, characterized in that, The vertex of the two-dimensional parabola is the origin of the two-dimensional rectangular coordinate system, and the direction of the optical axis coincides with the positive y-axis direction of the two-dimensional rectangular coordinate system.

5. The design method of a cone-shaped hole receiver according to claim 1, characterized in that, Determining the intersection point of the incident ray and the two-dimensional parabola specifically includes: taking half the diameter of the light spot as the intersection point coordinates on the x-axis, substituting the x-axis coordinates into the parabola equation to obtain the intersection point coordinates on the y-axis, and determining the coordinates of the intersection point using the x-axis coordinates and the y-axis coordinates.

6. The design method of a cone-shaped hole receiver according to claim 1, characterized in that, Using the constraint that the intersection of the upper base and one of the legs of the isosceles trapezoid must coincide with the reflected ray, and combining the equation of the reflected ray in two-dimensional coordinates, the height and cone angle of the isosceles trapezoid are solved. Specifically, this includes: establishing the trigonometric function relationship between the length of the lower base, the height, and the vertex angle of the isosceles trapezoid; establishing the intersection condition by utilizing the coincidence of the intersection of the upper base and one of the legs of the isosceles trapezoid with the reflected ray; and solving the system of equations using the trigonometric function relationship and the intersection condition to solve for the height and cone angle of the isosceles trapezoid.

7. The design method of a cone-shaped hole receiver according to claim 1, characterized in that, It also includes: using the design height and design cone angle, processing a manufacturing fixture with a spiral guide groove on the outer surface, winding the metal tube along the spiral guide groove of the fixture to form a conical spiral tube structure, fixing the coiled structure to obtain the conical cavity receiver.

8. A design system for a cone-shaped hole receiver, characterized in that, include: The data acquisition module is used to acquire the focal length and diameter parameters of the target parabolic disc condenser; The calculation module is used to determine the focal position and optical axis direction of the concentrator, preset a measurement target surface that moves along the optical axis direction, move the measurement target surface to the focal position of the concentrator, and measure the minimum spot diameter of sunlight converging on the target surface at this time; establish a two-dimensional parabolic curve based on the focal length and diameter parameters of the parabolic disc concentrator; preset an incident ray that is parallel to the optical axis direction and just passes through the edge of the minimum spot at the focal point, determine the intersection point of the incident ray and the two-dimensional parabolic curve, and obtain the reflected ray of the incident ray at the intersection point; The design module is used to represent the axial section of the cone-shaped hole receiver as an isosceles trapezoid in two-dimensional coordinates. The length of the lower base of the isosceles trapezoid is determined by the minimum spot diameter. With the constraint that the intersection of the upper base of the isosceles trapezoid and one of its legs must coincide with the reflected ray, the height and cone angle of the isosceles trapezoid are solved by combining the linear equation of the reflected ray in two-dimensional coordinates. The design height and design cone angle of the cone-shaped hole receiver are determined by the height and cone angle.

9. A computer device, comprising a memory, a processor, and a computer program stored in the memory, characterized in that, The processor executes the computer program to implement the steps of the method according to any one of claims 1 to 7.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is loaded by the processor, it is able to perform the steps of the method according to any one of claims 1 to 7.

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