Solar Tracker Damping for Wind-Load Twist Control
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Solution Overview
Problem
Solar tracker systems face challenges in maintaining optimal tilt angles under environmental loading conditions, such as wind and snow, which can lead to row twist and increased costs due to the need for additional actuators and complex communication systems to prevent system failure.
Innovation Solution
A photovoltaic system incorporating a damper with a variable damping ratio that adjusts based on movement speed, allowing for effective resistance against environmental loads while minimizing twist and reducing the load on actuators, thereby maintaining optimal energy capture and reducing system costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single actuator is used to control a long row of PV modules, then device complexity and cost are reduced, but row twist increases under environmental loading
Solution Approach 1:
A damper is introduced as an intermediary component between the actuator and the PV module row. The damper absorbs and dissipates environmental loads (wind, snow) that would otherwise cause row twist, allowing a single actuator to effectively control long rows without excessive twist while maintaining simplicity.
2Stability of the object's composition
If multiple actuators are used per row to reduce row twist, then row stability improves, but device complexity and maintenance costs increase
Solution Approach 1:
The destabilizing environmental loads are extracted and isolated from the actuator-PV module system by introducing a dedicated damper. This allows the actuator to focus solely on positioning without needing multiple units to compensate for environmental disturbances, maintaining row stability while avoiding the complexity of multiple actuators.
3Reliability
If multiple actuators with communication systems are used, then system reliability against row twist improves, but failure modes and maintenance requirements increase
Solution Approach 1:
The damper serves as a passive intermediary that mechanically dissipates environmental loads without requiring electronic communication or active control systems. This achieves reliable row stability through a simple mechanical solution that eliminates communication-related failure modes while reducing maintenance requirements.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The damper's adaptive damping ratio mitigates dynamic loads, reduces the risk of twist, and lowers system costs by allowing for a more efficient design that captures more solar energy while withstanding environmental conditions, thus enhancing the overall performance and reliability of the solar tracker system.
Implementation Method 1
A photovoltaic system incorporating a damper with a variable damping ratio that adjusts based on movement speed, allowing for effective resistance against environmental loads while minimizing twist
Data Source
AI summary
A photovoltaic system includes a collection of photovoltaic modules, a base supporting the collection of photovoltaic modules, and a damper coupled between the collection of photovoltaic modules and the base. The damper resists movement of the photovoltaic modules relative to the base. The damper has a first damping ratio when the collection of photovoltaic modules moves at a first rate relative to the base and a second damping ratio when the collection of photovoltaic modules moves at a second rate relative to the base, and the damper passively transitions from the first damping ratio to the second damping ratio.