Why do solar trackers need wind tunnel tests?

Wind tunnel tests are hence needed to examine the aerodynamic stability of the tracker array under different influencing factors, such as incoming flow conditions, tracking angles, and layouts. These findings will then help solar tracker manufacturers to determine the parameters in the design of the solar tracker structure.

How stable is a solar tracker?

The aerodynamic stability of a solar tracker is mainly determined by damping, stiffness (frequency), and tilt angle of modules; DAF reflects the dynamic amplification effect of the wind load, but not its structural stability. When the tilt angle is large, solar trackers have relatively good stability.

How does wind affect a solar tracker?

The key results of this experiment are the wind loads acting on the solar tracker, comprising the forces due to the mean incoming wind as well as the fluctuations induced by turbulence (buffeting), which depends upon the terrain characteristics in the nearby of the plant site.

How do solar trackers and solar farms respond to wind loads?

The structural response of solar trackers and solar farms to wind loads is typically evaluated in a wind tunnel. These experiments also enable cost-effective assessments of various design configurations before field deployment. A crucial aspect of such testing is the accurate characterization of the wind flow within the test section.

Do solar trackers need dynamic analysis?

Based on failures in the field and published research, it’s clear that dynamic analysis must be included in the evaluation of all solar system designs and structures. While the static analysis provided by wind tunnel tests is important, the analysis of the dynamic effects of wind on PV trackers is even more critical.

Why do solar power plants need wind trackers?

The local wind climate surrounding the solar power plant is also a vital factor. Specifically, the wind speed and predominant wind directions can influence how the power plants’ panels and their structures respond. The dynamic properties of the trackers have a massive influence on the design as well.