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Novel arrangement method of bionic solar thermal mirror field

A bionic and solar technology, applied in computing models, biological models, special data processing applications, etc., to achieve high optical efficiency, increase computing speed, reduce shadow and occlusion loss

Active Publication Date: 2017-07-14
POWERCHINA XIBEI ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, there are many difficulties in the calculation of the efficiency of the tower-type heliostat field and the determination of the coordinates of the mirror field, and there are various limitations in the existing methods. The influence of the shadows between the mirrors is the smallest, and the solar energy can be obtained to the maximum extent, so as to promote the research and innovation of cost-effective and large-scale utilization technology for the construction of solar heliostat mirror field, which has far-reaching significance for the implementation of energy strategy and the improvement of energy structure.

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  • Novel arrangement method of bionic solar thermal mirror field

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Embodiment 1

[0052] The present invention is an improved method based on bionic mirror field arrangement, which is inspired by the arrangement of leaves, branches, stems, etc. of plants, as shown in the attached figure 1 As shown, the order of arrangement of phyllotaxy or seeds of many plants in nature follows an optimized method, which can make all seeds have the same size but be properly dense, so as not to crowd too much at the center of the circle. The seeds are sparse at the circumference, ultimately keeping the system at the lowest energy level (getting the most sunlight with the least number of leaves or seed area). Based on this idea, the standard bionic heliostat field can be obtained by designing the bionic spiral and arranging the heliostat field according to the bionic spiral. The bionic heliostat field is a method based on However, for the standard bionic mirror field arrangement method, it is difficult to determine the optimal bionic spiral. At the same time, due to the use o...

Embodiment 2

[0061] On the basis of Embodiment 1, since the ultimate goal of mirror field arrangement is to improve the mirror field efficiency as much as possible, in order to optimize the heliostat field, it is necessary to first determine its efficiency calculation method. Generally speaking, the efficiency of the mirror field needs to be composed of several parts such as cosine, atmospheric attenuation, spillover, shadow and occlusion. Only by minimizing the losses in all aspects can a high mirror field efficiency be guaranteed.

[0062] Since the cosine efficiency and atmospheric attenuation losses are mainly related to the mirror field coordinates. Therefore, affected by these two factors, the distribution density of heliostats is also different when the efficient heliostat field is at different distances from the central heat absorption tower. The distribution density of heliostats close to the central heat absorption tower is high, and the distribution density of heliostats far aw...

Embodiment 3

[0071] When we solve the problem of mirror field efficiency calculation, we can evaluate a specific mirror field, and the arrangement with higher mirror field efficiency will have certain advantages over other solutions. Common traditional mirror field optimization methods mainly include: linear staggered arrangement method, radial grid method, year-round non-blocking method, etc. The linear staggered arrangement method is simple to implement, and it is easy to obtain a higher mirror field density, but it is not suitable for the needs of larger-scale mirror fields; the radial grid method can reduce excessive shadow and occlusion losses, but most of the heliostats of adjacent two rings The number of mirrors is equal, so that the actual increased perimeter is wasted, and the land cannot be fully utilized; the land utilization rate of the year-round no-shade method is not high, and it is rarely used in practice.

[0072] It can be seen that these traditional algorithms have some ...

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Abstract

The invention provides a novel arrangement method of a bionic solar thermal mirror field. The method comprises the following steps: 1, selecting mirror field bionic spiral initial value; 2, calculating influence factors of optimal heliostat arrangement and the mirror field efficiency; 3, optimizing heliostat position adjusting coefficients according to optimizing algorithm process until the optimal value is obtained; 4, determining heliostat coordinates; and 5, setting the mirror field arrangement; selecting and determining the bionic spiral initial value through a hill-climbing method; iteratively optimizing through an improved ion cluster algorithm based on the initial value; setting the heliostat position adjusting coefficients into a variable which varies according to the actual condition; and then solving and interpolating through an improved secant method and a golden section method, so as to obtain an efficient tower type solar thermal mirror field arrangement method. According to the method, a unique polygonal linked-list method is carried out to calculate shadow and blocking loss, so that the annual optical efficiency of the mirror field is maximum, and the land use area is minimum.

Description

technical field [0001] The invention belongs to the technical field of mirror field optimization of a tower-type solar thermal power generation system, and in particular relates to a novel bionic solar photothermal mirror field arrangement method. Background technique [0002] Solar thermal utilization technology is one of the technologies with a high degree of commercialization and popularization and application in the field of renewable energy technology. The tower solar thermal power generation system is an important direction of solar thermal utilization. The tower solar thermal power generation system uses heliostats to track The sun, so that the reflected light can be accurately projected onto the heat exchange surface of the heat absorber placed on the top of the receiving tower. The heat absorber converts solar energy into heat energy and heats the medium (water or other fluid) flowing in the coil to generate Medium and high temperature steam drives the turbogenerato...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50G06N3/00
CPCG06F30/13G06N3/00Y02E40/70
Inventor 周治肖斌王迎春张俊峰王晓
Owner POWERCHINA XIBEI ENG
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