CN-121980634-A - Linear Fresnel type heat collection field reflector parameter optimization design method and system

CN121980634ACN 121980634 ACN121980634 ACN 121980634ACN-121980634-A

Abstract

The application discloses a method and a system for optimally designing parameters of a reflector of a linear Fresnel type heat collection field, wherein the method comprises the steps of establishing a two-dimensional space coordinate system according to the arrangement direction of the linear Fresnel type heat collection field and the axis direction of the reflector; constructing a linear Fresnel type heat collection field reflector parameter optimization model based on the two-dimensional space coordinate system, and setting constraint conditions, wherein the linear Fresnel type heat collection field reflector parameter optimization model takes annual average field efficiency as an objective function; and solving the linear Fresnel type heat collection field reflector parameter optimization model by combining a particle swarm algorithm and a genetic algorithm to determine reflector parameters which maximize the annual average field efficiency. By using the scheme of the application, a uniform geometric standard is provided for optimization by establishing an accurate two-dimensional space coordinate system, and a parameter optimization model taking annual average field efficiency maximization as a core target is established, so that the long-term running performance of the heat collection field can be comprehensively considered.

Inventors

YAN JINGSHU
GUO SU
TANG HONGFEN
Guo Xiaozhuang
Qiao Yanhan
DU WENTAO

Assignees

中国大唐集团科技创新有限公司
河海大学

Dates

Publication Date: 20260505
Application Date: 20251215

Claims (10)

1. A linear Fresnel type heat collection field reflector parameter optimization design method is characterized by comprising the following steps: Establishing a two-dimensional space coordinate system according to the arrangement direction of the linear Fresnel type heat collection field and the axis direction of the reflector; constructing a linear Fresnel type heat collection field reflector parameter optimization model based on the two-dimensional space coordinate system, and setting constraint conditions, wherein the linear Fresnel type heat collection field reflector parameter optimization model takes annual average field efficiency as an objective function; and solving the linear Fresnel type heat collection field reflector parameter optimization model by combining a particle swarm algorithm and a genetic algorithm to determine reflector parameters which maximize the annual average field efficiency.
2. The optimal design method for the parameters of the linear fresnel type heat collection field reflector according to claim 1, wherein in the process of establishing a two-dimensional space coordinate system according to the arrangement direction of the linear fresnel type heat collection field and the axis direction of the reflector, a projection point of the heat collection tube in the linear fresnel type heat collection field on the ground is taken as an origin of coordinates, a horizontal direction perpendicular to the axis of the reflector is set as an x-axis, and a vertical upward direction is set as a y-axis.
3. The optimal design method for the linear fresnel heat collection field reflector parameters according to claim 1, wherein the calculation formula of the objective function is: , For the annual average field efficiency of the mirror, The field efficiency is averaged daily for day d.
4. The optimal design method for the linear fresnel heat collection field reflector parameters according to claim 3, wherein the daily average field efficiency is calculated based on the field efficiency at different times in a day, and the calculation formula of the field efficiency at each time is: , wherein, For the field efficiency at time T, For the optical efficiency at time T, The geometric efficiency at time T.
5. The optimal design method for the linear Fresnel type heat collection field reflector parameters according to claim 4, wherein the calculation formula of the optical efficiency at the moment T is as follows: , for the optical efficiency at time T, In order to reflect the reflectivity of the reflective material, To transmit the transmission of the transparent cover outside the absorber, The absorption rate of the solar light by the absorption cavity at the moment T.
6. The optimal design method for the linear fresnel heat collection field reflector parameters according to claim 4 or 5, wherein the calculation formula of the geometric efficiency at time T is: , For the geometrical efficiency at time T, For the loss of the ends of the collector, In order for the occlusion coefficient to be a factor, The cosine of the angle of incidence of the sun at time T.
7. The method for optimizing the design of the parameters of the reflector of the linear fresnel thermal-arrest field according to claim 1, wherein the constraint condition includes a reflector height constraint condition, and the reflector height constraint condition is: , wherein, For the highest height of the mirror, Is the height of the heat collector.
8. The optimal design method for the linear fresnel thermal-arrest field reflector parameters according to claim 7, wherein the constraint conditions further include a reflector position constraint condition, the reflector position constraint condition is: , wherein, For the coordinates of any point on the mirror surface in said two-dimensional spatial coordinate system, Is the radius of the mirror arc.
9. The method for optimizing the design of the reflector parameters of the linear Fresnel type heat collection field according to claim 1, wherein the reflector parameters comprise the reflector height and the radius of the reflector arc; Setting the maximum iteration times, and taking the reflector parameters as optimization variables in each iteration; searching and adjusting the reflector parameters through a particle swarm algorithm to obtain a population representing a parameter solution, and adjusting the population representing the parameter solution through a crossover interchange and mutation mechanism of a genetic algorithm; judging whether the maximum iteration times are reached; Determining and outputting mirror parameters that maximize the annual average mirror field efficiency in response to the maximum number of iterations being reached; in response to the maximum number of iterations not being reached, return is made to the step of searching and adjusting the mirror parameters.
10. A linear fresnel type heat collection field reflector parameter optimization design system, characterized in that the linear fresnel type heat collection field reflector parameter optimization design is performed by adopting the linear fresnel type heat collection field reflector parameter optimization design method according to any one of claims 1-9, and the system comprises: The coordinate system establishing module is used for establishing a two-dimensional space coordinate system according to the arrangement direction of the linear Fresnel type heat collection field and the axis direction of the reflector; The optimization model construction module is used for constructing a linear Fresnel type heat collection field reflector parameter optimization model based on the two-dimensional space coordinate system and setting constraint conditions, and the linear Fresnel type heat collection field reflector parameter optimization model maximizes the annual average field efficiency as an objective function; and the hybrid algorithm solving module is used for solving the linear Fresnel type heat collection field reflector parameter optimization model by combining a particle swarm algorithm and a genetic algorithm so as to determine reflector parameters which maximize the annual average field efficiency.

Description

Linear Fresnel type heat collection field reflector parameter optimization design method and system Technical Field The present application relates generally to the field of solar power generation technology. More particularly, the application relates to a method and a system for optimizing parameters of a linear Fresnel type heat collection field reflector. Background In a linear fresnel type solar photo-thermal power station (abbreviated as a linear fresnel type photo-thermal power station), a reflecting mirror is used as a core component and is responsible for capturing and reflecting solar energy by being mounted on a base formed by a unidirectional rotating shaft. The height of the reflecting mirror is the height of the rotating shaft from the ground, and the specific tracking strategy is adopted to track the solar rays in real time according to different arrangement modes of the mirror field. The linear phenanthrene photo-thermal power station is cooperated with an array (namely a mirror field) formed by a plurality of mirrors to reflect sunlight to a heat collector positioned in the center of the mirror field. The heat conducting medium in the heat collector converts solar energy into heat energy for storage after absorbing heat, and then converts the heat energy into electric energy through a heat exchange technology, so that the high-efficiency conversion of energy is realized. The height above ground of the collector center is referred to as collector height. In the existing traditional linear phenanthrene photo-thermal power plant mirror field design, the reflectors are usually arranged on the same horizontal line. Such arrangements, while common, must be designed with tight control of the spacing between the mirrors to maximize the amount of sunlight received while minimizing shading and shading losses, thereby ensuring efficient collection of solar energy. The core problem is the space utilization limitation caused by the horizontal single-row layout, so that the land utilization rate has to be sacrificed when pursuing minimized shielding, and the optimal annual average field efficiency is difficult to achieve through simple horizontal spacing adjustment. In view of the foregoing, it is desirable to provide a design scheme for optimizing parameters of a linear fresnel type heat collection field reflector to solve the above problems so as to maximize the annual average field efficiency. Disclosure of Invention In order to solve at least one or more of the technical problems mentioned above, the present application proposes, in various aspects, a linear fresnel type heat collecting field mirror parameter optimization design. In a first aspect, the application provides a linear Fresnel type heat collection field reflector parameter optimization design method, which comprises the steps of establishing a two-dimensional space coordinate system according to the arrangement direction of a linear Fresnel type heat collection field and the axis direction of a reflector, establishing a linear Fresnel type heat collection field reflector parameter optimization model based on the two-dimensional space coordinate system, setting constraint conditions, maximizing the annual average mirror field efficiency of the linear Fresnel type heat collection field reflector parameter optimization model as an objective function, and solving the linear Fresnel type heat collection field reflector parameter optimization model by combining a particle swarm algorithm and a genetic algorithm to determine reflector parameters for maximizing the annual average mirror field efficiency. In some embodiments, in the process of establishing a two-dimensional space coordinate system according to the arrangement direction of the linear fresnel type heat collection field and the axis direction of the reflector, a projection point of the heat collection tube on the ground in the linear fresnel type heat collection field is taken as a coordinate origin, a horizontal direction perpendicular to the axis of the reflector is set as an x-axis, and a vertical upward direction is set as a y-axis. In some embodiments, the objective function is calculated as:, For the annual average field efficiency of the mirror, The field efficiency is averaged daily for day d. In some embodiments, the daily average field efficiency is calculated based on the field efficiency at different times in a day, and the formula for calculating the field efficiency at each time is: , wherein, For the field efficiency at time T,For the optical efficiency at time T,The geometric efficiency at time T. In some embodiments, the calculation formula for the optical efficiency at time T is:, for the optical efficiency at time T, In order to reflect the reflectivity of the reflective material,To transmit the transmission of the transparent cover outside the absorber,The absorption rate of the solar light by the absorption cavity at the moment T. In some embodiments, the calcula