Reflector for bifacial solar module and bifacial photovoltaic system including the same
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Solution Overview
Problem
Existing bifacial solar module systems face limitations in adjusting the angle of reflective mirrors to account for variations in the sun's elevation angle, leading to reduced reflection efficiency of scattered light and suboptimal power generation performance due to environmental factors.
Innovation Solution
A reflector system with a mobile cart and control portion that automatically adjusts the position and angle of a reflecting panel to maximize power generation, incorporating multiple reflective surfaces and IoT technology to optimize the reflection of both direct and scattered sunlight across bifacial solar modules.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a fixed reflective mirror is used in existing bifacial solar module systems, then the structure is simple and easy to manufacture, but the reflection efficiency of scattered light is insufficient and power generation performance is suboptimal due to inability to adjust for sun's elevation angle variations
Solution Approach 1:
The reflective mirror is transformed from a fixed structure to a movable one mounted on a mobile cart with wheels. The cart can be repositioned along the ground between adjacent photovoltaic devices, allowing the mirror to dynamically adjust its position and angle relative to the sun's elevation angle, thereby optimizing reflection efficiency of both direct and scattered light throughout the day and seasons
Solution Approach 2:
The system incorporates a control portion that automatically controls the position of the mobile cart supporting the reflective mirror. This automated control enables the system to self-adjust for variations in the sun's elevation angle without requiring manual intervention, maximizing power generation performance while reducing operational complexity
2Productivity
If a uniform reflective surface is used, then the manufacturing is simple, but only direct light is reflected effectively while scattered light reflection efficiency is insignificant
Solution Approach 1:
The reflective mirror is designed with a non-uniform reflective surface featuring different regions with varying reflectivity characteristics. Specifically, the mirror includes a first reflective region for reflecting direct light and a second reflective region with different angular distribution properties for reflecting scattered light. This local differentiation in reflective properties enables the single mirror to effectively handle both direct and scattered sunlight, improving overall power generation efficiency while maintaining manufacturing feasibility
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 enhances power generation performance by automatically adjusting to the sun's elevation angle, effectively reflecting scattered light and maximizing energy output from bifacial solar modules, improving overall power generation efficiency.
Implementation Method 1
a reflecting panel configured to reflect sunrays toward back surfaces of a first bifacial solar module and a second bifacial solar module
Implementation Method 2
A bifacial light-receiving solar module generates power by not only absorbing direct light at a front surface but also absorbing light at a back surface
Data Source
AI summary
Disclosed are a reflector for a bifacial solar module and a bifacial photovoltaic system including the same, wherein the reflector includes a reflecting panel configured to reflect sunrays toward back surfaces of a first bifacial solar module and a second bifacial solar module which are located higher than the ground, a mobile cart configured to support the reflecting panel and be movable below and between the first bifacial solar module and the second bifacial solar module, and a control portion configured to control a position of the mobile cart to maximize power generation amounts of the first bifacial solar module and the second bifacial solar module.