Hybrid Solar Panel Fault Diagnosis Using Refrigerant Temperature Delta
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Solution Overview
Problem
Existing solar photovoltaic panel maintenance methods, such as manual inspection and drone-based imaging, are time-consuming and costly, and struggle to efficiently detect defects in large arrays due to environmental conditions and light reflection, making it difficult to maintain power generation efficiency.
Innovation Solution
A hybrid panel system with a solar thermal panel and temperature sensors measuring refrigerant temperature differences along a refrigerant flow path to diagnose panel abnormalities, using a server to compare these differences against reference data for efficient defect detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If manual inspection with thermal imaging camera is used, then accurate viewing of solar photovoltaic module is achieved, but photographing takes a lot of time and expenses
Solution Approach 1:
The patent applies preliminary action by pre-installing temperature sensors and refrigerant flow paths within the hybrid panel structure during manufacturing. This allows continuous temperature monitoring to be ready in advance, eliminating the need for time-consuming manual thermal imaging during operation. The system proactively measures temperatures before defects become apparent, enabling real-time monitoring without interrupting power generation.
Solution Approach 2:
The hybrid panel performs self-diagnosis through integrated temperature sensors and refrigerant flow monitoring that automatically detect defects. The system serves itself by continuously monitoring its own thermal state and comparing it against normal operating parameters, eliminating the need for external manual inspection with thermal imaging cameras.
2Measurement precision
If manual inspection method is used, then detailed examination of each panel is possible, but maintenance cost increases due to difficult access
Solution Approach 1:
The system implements self-service by incorporating automated temperature monitoring and defect detection capabilities directly into the panel structure. Temperature sensors and refrigerant flow paths continuously monitor panel health, automatically identifying defects without requiring manual intervention. This eliminates the need for costly maintenance personnel to physically access and inspect each panel, especially those in hard-to-reach locations.
Solution Approach 2:
The patent replaces the mechanical manual inspection process with an automated thermal monitoring system. Instead of using human inspectors with thermal imaging cameras, the system uses embedded temperature sensors and refrigerant temperature differential measurements to automatically detect defects, substituting mechanical human labor with an automated sensing and processing system.
3Ease of operation
If drone-based imaging method is used, then access to difficult-to-reach panels is improved, but detection accuracy decreases due to environmental conditions and light reflection
Solution Approach 1:
The patent extracts the temperature measurement function from external imaging methods and integrates it directly into the panel's internal refrigerant flow system. By placing temperature sensors within the refrigerant lines that flow through or along each panel, the system obtains direct thermal data from each panel's internal state, eliminating reliance on external drone-based thermal imaging that is affected by environmental conditions and light reflection.
Solution Approach 2:
The refrigerant acts as an intermediary that directly contacts or closely approaches each solar panel, transferring thermal information from the panels to temperature sensors. This intermediary mechanism provides accurate thermal data from each panel's actual operating temperature, bypassing the limitations of external optical measurement methods that are influenced by ambient light and environmental factors.
4Power
If a number of solar photovoltaic panels are operated to generate large power, then power generation capacity increases, but defect accumulation reduces overall efficiency
Solution Approach 1:
The system implements feedback by continuously monitoring refrigerant temperature differentials across multiple panels and comparing them against normal operating ranges. When temperature deviations indicate potential defects, the system provides feedback signals to identify specific problematic panels. This enables proactive maintenance of large panel arrays, preventing defect accumulation that would reduce overall power generation efficiency while maintaining high capacity operation.
Solution Approach 2:
The patent applies preliminary action by continuously monitoring temperature parameters to detect early signs of panel defects before they significantly impact power generation. The system proactively identifies panels with developing issues through refrigerant temperature differential measurements, allowing maintenance to be performed before defects accumulate and reduce the efficiency of the entire power generation array.
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
Enables rapid, cost-effective detection of panel defects by analyzing refrigerant temperature changes, reducing manual effort and improving power generation efficiency by identifying abnormalities without the limitations of traditional methods.
Implementation Method 1
a solar photovoltaic panel configured to generate electrical energy by receiving sunlight
Implementation Method 2
a refrigerant for cooling the solar photovoltaic panel by absorbing heat generated as sunlight irradiates the solar photovoltaic panel
Implementation Method 3
a refrigerant for cooling the solar photovoltaic panel by absorbing heat generated as sunlight irradiates the solar photovoltaic panel
Data Source
AI summary
A hybrid panel abnormality diagnosis system includes a solar photovoltaic panel generating electrical energy by receiving sunlight, a solar thermal panel which is formed on a lower portion of the solar photovoltaic panel and in which a refrigerant flow path where a refrigerant for cooling the solar photovoltaic panel by absorbing heat generated as sunlight irradiates the solar photovoltaic panel flows is formed and which has a temperature sensor unit measuring and collecting a refrigerant temperature difference between an inlet port and an outlet port of the refrigerant flow path, and an abnormality diagnosis server diagnosing whether the solar photovoltaic panel is abnormal.


