Tracking error analysis of primary mirror in Linear Fresnel heat collecting field

Aiming at the tracking error of the primary mirror in the Linear Fresnel concentrated light and heat field, according to the structural characteristics of the Linear Fresnel concentrating and heat collecting system, the analysis model of the system concentrating error is established. By analyzing the mirror shape error of the Linear Fresnel system, the installation error of the secondary mirror (CPC), the errors of the north-south layout of the mirror field, the deviation of the primary mirror rotation axis and the deviation of the temperature drift of the angle sensor, and the factors were calculated by MATLAB simulation. The concentrating error factors affecting the Linear Fresnel concentrating and heat collecting system are analyzed quantitatively. From the simulation results: during the whole day, the influence of the north-south layout deviation of the mirror field and the deviation of the primary mirror rotation axis on the tracking accuracy is time-varying, and the influence is greater in the midday period. During the whole year, the influence factors of the north-south deviation of the mirror field and the temperature drift of the angle sensor on the tracking accuracy are incident, and the influence is greater in winter and less in summer. The installation error of CPC has a constant influence on the tracking accuracy.