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

VSEngineering 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

Engineering Contradiction:
Improveaccuracy of defect detectionVSAvoidtime for photographing and checking panels
Core Design Contradiction:
Measurement precisionVSLoss of time

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.

Inventive Principle:
Principle #10Preliminary action

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.

Inventive Principle:
Principle #25Self-service

2Measurement precision

If manual inspection method is used, then detailed examination of each panel is possible, but maintenance cost increases due to difficult access

Engineering Contradiction:
Improvedetailed examination capabilityVSAvoidmaintenance cost
Core Design Contradiction:
Measurement precisionVSEase of manufacture

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.

Inventive Principle:
Principle #25Self-service

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.

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical 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

Engineering Contradiction:
Improveaccessibility to remote panelsVSAvoiddetection accuracy
Core Design Contradiction:
Ease of operationVSMeasurement precision

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.

Inventive Principle:
Principle #2Taking out (Extraction)

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.

Inventive Principle:
Principle #24Intermediary (Mediator)

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

Engineering Contradiction:
Improvepower generation capacityVSAvoidpower generation efficiency
Core Design Contradiction:
PowerVSProductivity

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.

Inventive Principle:
Principle #23Feedback

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.

Inventive Principle:
Principle #10Preliminary action

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

Methodology Applied
Scientific EffectPhotovoltaic effect: Photovoltaic Effect

Implementation Method 2

a refrigerant for cooling the solar photovoltaic panel by absorbing heat generated as sunlight irradiates the solar photovoltaic panel

Methodology Applied
Scientific EffectHeat absorption: Absorption (physical)

Implementation Method 3

a refrigerant for cooling the solar photovoltaic panel by absorbing heat generated as sunlight irradiates the solar photovoltaic panel

Methodology Applied
Scientific EffectHeat transfer: Conduction (thermal)

Data Source

PatentUS12549130B2Hybrid panel and hybrid panel abnormality diagnosis system including same
Publication Date: 2026.02.10 KEUKDONG ENERGY CO LTD
  • US12549130B2 patent drawing
  • US12549130B2 patent drawing
  • US12549130B2 patent drawing

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.