Global acceleration factors for damp heat tests of PV modules

Kimball, Gregory M.; Yang, Shuying; Saproo, Ajay

doi:10.1109/pvsc.2016.7749557

Cited by 13 publications

(8 citation statements)

References 6 publications

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“…Mean results from the graphical and calculation methods are given in Table 2 for mirrors A and B with the standard deviation. Values from the literature 27,[29][30][31] are reported too for comparison with the results. There are no available data on solar mirrors, to the best of our knowledge, so the comparison was made with values established for photovoltaic modules.…”

Section: Peck and Eyring Numerical Model Parameters Calculation Basedmentioning

confidence: 97%

“…Table 2. Kinetic parameters for mirrors A and B and values from the literature 27,[29][30][31] Mirror A Mirror B Lit. 30 Lit.…”

Section: Peck and Eyring Numerical Model Parameters Calculation Basedmentioning

confidence: 99%

“…This suggests that the mirrors are more sensitive to damp heat test than PV modules or microelectronic devices. 29,31 This finding is relevant because both of these systems are protected by packaging designed for resistance against humidity, whereas mirrors are designed for arid sites with usually low relative humidity.…”

Section: Peck and Eyring Numerical Model Parameters Calculation Basedmentioning

confidence: 99%

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Accelerated aging test modeling applied to solar mirrors

et al. 2019

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The durability of solar mirrors is a critical factor for the deployment of concentrating solar power plants. Accelerated aging test models currently applied in the polymer, electronic, and photovoltaic fields have recently been reviewed, and the issues of their application to solar mirrors have been discussed. This article first reports the results of temperature, humidity, and light irradiance accelerated aging tests performed to assess the dependent parameters of selected models from the literature. These parameters include the apparent activation energy for the Arrhenius temperature law, the Peck and Eyring coefficients for humidity models and the Schwarzschild coefficient for the irradiance law. The experimental values were then assessed for specular reflectance loss of solar mirrors. Finally, using these parameters, acceleration factors were calculated for solar mirrors. An effective temperature considering the Arrhenius degradation law was used rather than the commonly used mean temperature. This question is also addressed for light irradiance by using the dose instead of the mean value.

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Section: Peck and Eyring Numerical Model Parameters Calculation Basedmentioning

confidence: 97%

“…Table 2. Kinetic parameters for mirrors A and B and values from the literature 27,[29][30][31] Mirror A Mirror B Lit. 30 Lit.…”

Section: Peck and Eyring Numerical Model Parameters Calculation Basedmentioning

confidence: 99%

Section: Peck and Eyring Numerical Model Parameters Calculation Basedmentioning

confidence: 99%

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Accelerated aging test modeling applied to solar mirrors

et al. 2019

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“…Temperature is further increased to 65 make specific factors such as module operating temperature and RH for optimum performance mandatory on their nameplate details for diverse technologies that are susceptible to varied conditions [84]. Despite the widespread use of DH testing, an agreement on the acceleration factor associated with DH testing and field circumstances has yet to develop [85]; Although, recently an attempt was made where Peck and Braisaz model were used to analytical evaluate the degradation effect in module parameters for different location ranging from tropical to hot environment, also the results were compared to damp heat test carried out (as per IEC61215) by Hulkoff in 2009. The degradation rates for six cities evaluated from model by taking temperature and humidity of the particular location as an input parameter, the R sh reduces from 17.33 to 35.67%, R s increased from 3.77 to 7.55%, FF reduces by 8%-19%, I sc reduces from 2.86 to 7.14%, V oc reduces from 0.43 to 0.66% and PV module efficiency reduces by 7.75%-19.44%.…”

Section: Pid Effect For C-si Spv Modulesmentioning

confidence: 99%

Performance and degradation analysis for different solar photovoltaic technologies under hot and humid environment: a review

Makhija,

Bohra

2023

Prog. Energy

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Solar photovoltaic (SPV) systems installed on water bodies, i.e., floating solar PV (FSPV) and canal top solar PV (CTSPV), have gained significant propulsion in recent years, not only because of their enormous potential but also because of other additional co-benefits. This review article discusses the scope and potential of FSPV and CTSPV, an ambitious plan, and various upcoming FSPV projects in India. The review focuses on different degradation modes, failure mechanisms, characterization techniques and distinct factors influencing the degradation of SPVs operating in tropical climates. It was explored that potential induced degradation (PID) and materialistic degradation have a significant impact on the performance of SPV. The paper provides an overview of the test procedures outlined in IEC-61215 and IEC-62804 that pertain to SPV performance under hot and humid conditions. Additionally, it presents a comprehensive review of the various methodologies adopted for accelerated damp heat testing to predict the life of PV systems in such conditions, and their significant analytical and visual outcomes is elucidated. Also, till date, no simulation tool has been available to assess the long-term performance of SPV in a humid environment. As this energy generation technique is still in its infancy, this study will help many researchers and solar power developers recognize the impact of elevated and prolonged exposure to temperature and humidity on generation, degradation, and mode of failure for different SPV technologies.

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“…Koehl et al and Kimball et al separately examined the acceleration of the 85 °C 85% testing condition in the dark over the use environment. [ 25,26 ] Methodologies, review, and examples for computing the degradation of PV module materials are given by Kempe et al [ 27 ] These authors gave a degradation rate proportionality formula for PET, as measured by degradation in mechanical properties such as embrittlement, elongation to break, and rate to failure (reciprocal of time to failure), as

R \left(\right. T , R H \left.\right) \propto e^{\frac{- E_{\text{a}}}{k T}} R H^{n}

…”

Section: Introductionmentioning

confidence: 99%

Acceleration Factors for Combined‐Accelerated Stress Testing of Photovoltaic Modules

et al. 2023

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Numerous field failures are observed in photovoltaic (PV) modules that pass standardized design qualification and type approval testing. Standardized tests are typically mechanism-specific and only developed after the failure mode has caused extensive trouble in the field. For example, technical papers emerged in 1977 that showed PV module susceptibility to system voltage in humid conditions, presently referred to as potential-induced degradation (PID). [1,2] Methods for PID testing were proposed in 1978 but not widely implemented. [3] While some work continued in thin film technology, [4] the phenomenon was largely ignored until field failures with various PID types were extensively reported. The PID issue led to a great deal of financial cost in the 2005 to 2015 timeframe. [5,6] Field-relevant PID test methods were agreed upon and standardized in IEC 62 804-1 in 2015 [7] and incorporated into IEC 61 215 qualification testing in 2021, [8] which is 44 years after the first publications about PID. Faulty products were produced, shipped, and sold with many consumers unaware of the issue. Other examples of degradation modes discovered after extensive shipments of PV modules include light and elevated temperature induced degradation (LETID), an important degradation mode in modules with passivated emitter and rear contact (PERC) cells, [9][10][11] and cracking of polyamide (PA) and certain polyvinylidene fluoride (PVDF)-based backsheets. [12,13] With the discovery of new degradation or failure mechanisms, numerous tests were added to comprehensively examine these

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Global acceleration factors for damp heat tests of PV modules

Cited by 13 publications

References 6 publications

Accelerated aging test modeling applied to solar mirrors

Accelerated aging test modeling applied to solar mirrors

Performance and degradation analysis for different solar photovoltaic technologies under hot and humid environment: a review

Acceleration Factors for Combined‐Accelerated Stress Testing of Photovoltaic Modules

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