Bifacial Solar Module Support with Independent Reflector Tracking
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Solution Overview
Problem
Conventional bifacial solar modules face performance degradation due to shading and uneven light distribution, which limits their energy output, especially when mounted in fixed tilt arrangements or with trackers, as they require uniform radiation to operate optimally.
Innovation Solution
A solar energy collection system comprising a bifacial photovoltaic module with a support structure and reflectors that rotate independently to ensure even light distribution on both sides, using a solar tracker to adjust the position relative to the sun, thereby minimizing shading and enhancing energy harvesting from both direct and diffuse light.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If bifacial modules are mounted in fixed tilt or tracker arrangements, then they can harvest solar energy, but shading and uneven light distribution cause performance degradation
Solution Approach 1:
The patent employs dual independent tracking systems: one tracker rotates the entire assembly (module + reflectors) to follow the sun's movement, while a second tracker independently adjusts the reflector angles to optimize light reflection onto the module's rear surface. This dynamic adjustment ensures uniform light distribution on both surfaces while minimizing shading effects throughout the day.
Solution Approach 2:
The patent introduces reflective surfaces as intermediary elements that capture sunlight and redirect it onto the rear photovoltaic surface of the bifacial module. This intermediary mechanism enables the rear surface to receive supplemental light independent of direct sunlight, balancing the light distribution between front and rear surfaces and reducing the impact of shading on overall performance.
2Illumination intensity
If reflectors are used to direct sunlight onto the module, then light concentration is boosted, but uneven radiation distribution causes the module to not perform at full potential
Solution Approach 1:
The reflective surfaces are mounted on independent trackers that continuously adjust their angles to maintain optimal light concentration and uniform distribution onto the module's rear surface. This dynamic positioning ensures that reflected light is evenly distributed across the entire rear surface area, preventing hot spots and maximizing the effectiveness of light concentration.
Solution Approach 2:
The patent employs multiple separate reflective surfaces positioned at different locations and angles, each tailored to direct light onto specific regions of the module's rear surface. This localized approach ensures that each area of the rear surface receives appropriate light concentration, achieving uniform overall distribution while maintaining high illumination intensity where needed.
3Productivity
If bifacial modules are used to harvest light from both sides, then power output can reach 195% of top side rating, but the system complexity increases
Solution Approach 1:
The reflective surfaces serve multiple functions: they concentrate sunlight onto the rear surface, adjust light distribution patterns, and can be independently positioned to optimize performance under varying sun angles and weather conditions. This multi-functionality allows the system to achieve high power output from both module surfaces while managing structural complexity through versatile component design.
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 system significantly boosts energy output by up to 195% of the top-side power rating by ensuring uniform and optimal light distribution on both sides of the bifacial module, overcoming the limitations of conventional systems and improving efficiency in varying light conditions.
Implementation Method 1
a first reflector and a second reflector configured to reflect solar energy onto the second photovoltaic surface
Implementation Method 2
Solar modules are comprised of an array of solar cells which collect light energy (photons) from the sun to generate electricity through the photovoltaic effect
Data Source
AI summary
Described herein are solar energy collection systems, devices, and methods for harvesting solar energy. In some embodiments, the devices, systems, and methods described herein comprise a bifacial photovoltaic module, a reflector, a rod and a support structure.