Welcome to Francis Academic Press

Academic Journal of Computing & Information Science, 2023, 6(13); doi: 10.25236/AJCIS.2023.061319.

Design of helichostat field based on shadow projection method and discretization principle

Author(s)

Yu Zhou, Jiawei He, Aiyu Wang, Shunxin Pan, Dejin Miao

Corresponding Author:
Jiawei He
Affiliation(s)

School of Computer and Information Engineering, Nantong Institute of Technology, Nantong, 226001, China

Abstract

The optical efficiency of the heliostat is investigated by discretization principle, light tracing method and frame conversion, and the best parameters were found by genetic algorithm and simulated annealing algorithm. First, the annual average optical efficiency of the heliostatic field is calculated, considering factors such as shadow occlusion efficiency, cosine efficiency, atmospheric transmission and collector truncation efficiency. The shadow occlusion efficiency includes the shadow loss of the absorption tower, the shadow loss of the rear helioscope and the reflection loss of the rear helioscope. The annual average shadow occlusion efficiency of 0.99 is calculated by the shadow projection method and the discretization principle. The cosine efficiency is equal to the cosine value of the incident light, and the calculated annual average cosine efficiency is 0.76. The truncation efficiency of the collector was calculated by ray tracing to yielding an average annual cutoff efficiency of 0.92. After the comprehensive calculation, the annual average optical efficiency is 0.61. Then, the annual average output thermal power of the heliostat field and the annual average output thermal power per unit mirror area are calculated, and the annual average output thermal power is 37370.00224 kW / m². The annual average output thermal power per unit mirror area can be simply calculated from the annual average output thermal power, which is 0.593871414 kW / m². These computational results provide an important reference for the performance of the heliostat field and help to optimize parameters and improve energy efficiency.

Keywords

Design of heliostatic field; discretization; light tracing method; genetic algorithm and simulated annealing algorithm

Cite This Paper

Yu Zhou, Jiawei He, Aiyu Wang, Shunxin Pan, Dejin Miao. Design of helichostat field based on shadow projection method and discretization principle. Academic Journal of Computing & Information Science (2023), Vol. 6, Issue 13: 127-137. https://doi.org/10.25236/AJCIS.2023.061319.

References

[1] Liu Jianxing. Optical efficiency modeling and simulation and optimal layout of tower photothermal power station. Lanzhou Jiaotong University. 2022

[2] Xiao Yixing. Distribution optimization and cluster control of heliostat in tower solar thermal power plant. Changsha University of Science and Technology, 2020.

[3] Zhang Ping, optical efficiency of solar tower [J]. Technology and Market, 2021, 28 (6): 5-8.

[4] Du Yuhang et al., analysis of the impact of different focusing strategies of the helichoscope of tower photothermal power stations [J]. Journal of Power Engineering, 2020, 40 (5): 426-432.

[5] Zhao, Lei, Liu, et al. Design of multi-narrowband metamaterial perfect absorbers in near-infrared band based on resonators asymmetric method and modified resonators stacked method[J]. Optics Communications: A Journal Devoted to the Rapid Publication of Short Contributions in the Field of Optics and Interaction of Light with Matter, 2018.