Thermal Cycling Damp Heat and Freeze Test Chamber
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Thermal Cycling Damp Heat and Freeze Test Chamber is an environmental reliability testing system designed to evaluate photovoltaic modules under extreme temperature variation and high-humidity freezing conditions. By repeatedly cycling between high temperature, low temperature, and damp heat environments, the chamber simulates day–night temperature differences, seasonal transitions, and freeze–thaw stresses encountered during long-term outdoor operation. The system is used to verify structural integrity, electrical performance stability, and encapsulation durability of photovoltaic modules, serving as a critical test platform for design validation, type testing, and quality control.
Application
This chamber is widely used in photovoltaic and related renewable energy fields, including but not limited to:
Thermal cycling and damp heat freeze reliability testing of crystalline silicon photovoltaic modules (monocrystalline and polycrystalline)
Environmental durability evaluation of thin-film photovoltaic modules such as CdTe, CIGS, and amorphous silicon
Temperature and humidity resistance verification of photovoltaic encapsulation materials including EVA, backsheets, glass, and encapsulants
Design verification (DV) and type testing (TT) during photovoltaic module development
Factory inspection and consistency quality control of photovoltaic modules
Standardized photovoltaic module testing in third-party inspection and certification laboratories
Environmental reliability research of new energy materials and devices in universities and research institutes
Standards
(1)GB/T 9535 Crystalline Silicon Terrestrial Photovoltaic (PV) Modules – Design Qualification and Type Approval
(2)GB/T 18911 Photovoltaic Modules – Environmental Test Methods
(3)GB/T 2423.1 Environmental Testing for Electric and Electronic Products – Part 2: Test Methods – Test A: Cold
(4)GB/T 2423.2 Environmental Testing for Electric and Electronic Products – Part 2: Test Methods – Test B: Dry Heat
(5)GB/T 2423.3 Environmental Testing for Electric and Electronic Products – Part 2: Test Methods – Test Ca: Damp Heat, Steady State
(6)IEC 61215 Terrestrial Photovoltaic (PV) Modules – Design Qualification and Type Approval
(7)IEC 61730 Photovoltaic (PV) Module Safety Qualification
(8)IEC 60068-2-1 / IEC 60068-2-2 / IEC 60068-2-30 Environmental Testing – Cold, Dry Heat, Damp Heat
(9)UL 1703 Standard for Flat-Plate Photovoltaic Modules and Panels
(10)JIS C 8918 Environmental Test Methods for Photovoltaic Modules (partially applicable)
Parameters
| Item | Technical Specification |
|---|---|
| Temperature range | -40 ℃ to 85 ℃ |
| Temperature fluctuation | ≤ ±1 ℃ |
| Temperature deviation | ≤ ±1 ℃ |
| Temperature uniformity | ≤ ±2 ℃ |
| Heating and cooling rate | Compliant with IEC 61215 requirements |
| Humidity range | 30 %RH to 98 %RH |
| Relative humidity deviation | ±3 %FS; 85 ±2 %RH; 90 ±2 %RH |
| Humidity fluctuation | ±2 %RH |
| Humidity uniformity | ≤ 2 %RH |
| Temperature change rate | ≤ 100 ℃/h |
| Extreme temperature dwell time | ≥ 10 min |
| Test cycle count | 200 cycles or 50 cycles |
| Maximum sample capacity | 12 photovoltaic modules |
| Inner chamber dimensions | Approx. 1.5 × 2.5 × 1.5 m (L × W × H) |
| Outer chamber dimensions | Approx. 2.5 × 3.0 × 2.5 m (L × W × H) |
| Power supply | AC 380 V / 60 Hz |
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