Academic Journal of Computing & Information Science, 2023, 6(13); doi: 10.25236/AJCIS.2023.061319.
Yu Zhou, Jiawei He, Aiyu Wang, Shunxin Pan, Dejin Miao
School of Computer and Information Engineering, Nantong Institute of Technology, Nantong, 226001, China
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.
Design of heliostatic field; discretization; light tracing method; genetic algorithm and simulated annealing algorithm
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.
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