Thermo-mechanical deformation degradation of crystalline silicon photovoltaic (c-Si PV) module in operation

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Abstract

Reliability and mean-time-to-failure (MTTF) of crystalline silicon photovoltaic (c-Si PV) module operating at elevated temperature can be increased through in-depth understanding of the mechanics of thermo-mechanical deformation and degradation of the laminates bonded together in the system. The knowledge is critical to developing the next generation of robust c-Si PV modules. Deployment in elevated ambient temperature reduces the 25-year design life by inducing excessive deformation that results in significant laminate degradation. The research investigates the thermo-mechanical deformation of c-Si PV module. Analytical and simulation methods are employed in the investigation. The IEC 61215 test qualification is used. Ethylene vinyl acetate (EVA) and solder materials responses are modelled as temperature dependent with appropriate material models. Analytical technique for validating simulation results of the response of c-Si PV module to temperature load is presented. The laminate’s stiffness is found to be governed by the stiffness ratio magnitude of silicon which is the most stressed component. The deformation ratio of EVA is highest and significantly determines the degree of variation of gap between solar cells. The EVA exhibits the highest susceptibility to thermo-mechanical deformation followed by the solder which is found to accumulate the highest magnitude of strain energy density. The research presents an analytical method that can be used to validate the output of computer-simulation of the magnitude of strain energy density of solder in c-Si PV modules.

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Silicon
Crystalline materials
Degradation
Soldering alloys
Laminates
Ethylene
Strain energy
Stiffness
Temperature
Loads (forces)
Solar cells
Mechanics
Computer simulation
vinyl acetate
ethylene

Cite this

@article{626cb54d5f6a44278f7ba1daa6e7ac0d,
title = "Thermo-mechanical deformation degradation of crystalline silicon photovoltaic (c-Si PV) module in operation",
abstract = "Reliability and mean-time-to-failure (MTTF) of crystalline silicon photovoltaic (c-Si PV) module operating at elevated temperature can be increased through in-depth understanding of the mechanics of thermo-mechanical deformation and degradation of the laminates bonded together in the system. The knowledge is critical to developing the next generation of robust c-Si PV modules. Deployment in elevated ambient temperature reduces the 25-year design life by inducing excessive deformation that results in significant laminate degradation. The research investigates the thermo-mechanical deformation of c-Si PV module. Analytical and simulation methods are employed in the investigation. The IEC 61215 test qualification is used. Ethylene vinyl acetate (EVA) and solder materials responses are modelled as temperature dependent with appropriate material models. Analytical technique for validating simulation results of the response of c-Si PV module to temperature load is presented. The laminate’s stiffness is found to be governed by the stiffness ratio magnitude of silicon which is the most stressed component. The deformation ratio of EVA is highest and significantly determines the degree of variation of gap between solar cells. The EVA exhibits the highest susceptibility to thermo-mechanical deformation followed by the solder which is found to accumulate the highest magnitude of strain energy density. The research presents an analytical method that can be used to validate the output of computer-simulation of the magnitude of strain energy density of solder in c-Si PV modules.",
author = "Emeka Amalu and David Hughes and Farhad Nabhani and Julie Winter",
year = "2017",
month = "11",
day = "28",
doi = "10.1016/j.engfailanal.2017.11.009",
language = "English",
journal = "Engineering Failure Analysis",
issn = "1350-6307",
publisher = "Elsevier BV",

}

Thermo-mechanical deformation degradation of crystalline silicon photovoltaic (c-Si PV) module in operation. / Amalu, Emeka; Hughes, David; Nabhani, Farhad; Winter, Julie.

In: Engineering Failure Analysis, 28.11.2017.

Research output: Contribution to journalArticleResearchpeer-review

TY - JOUR

T1 - Thermo-mechanical deformation degradation of crystalline silicon photovoltaic (c-Si PV) module in operation

AU - Amalu, Emeka

AU - Hughes, David

AU - Nabhani, Farhad

AU - Winter, Julie

PY - 2017/11/28

Y1 - 2017/11/28

N2 - Reliability and mean-time-to-failure (MTTF) of crystalline silicon photovoltaic (c-Si PV) module operating at elevated temperature can be increased through in-depth understanding of the mechanics of thermo-mechanical deformation and degradation of the laminates bonded together in the system. The knowledge is critical to developing the next generation of robust c-Si PV modules. Deployment in elevated ambient temperature reduces the 25-year design life by inducing excessive deformation that results in significant laminate degradation. The research investigates the thermo-mechanical deformation of c-Si PV module. Analytical and simulation methods are employed in the investigation. The IEC 61215 test qualification is used. Ethylene vinyl acetate (EVA) and solder materials responses are modelled as temperature dependent with appropriate material models. Analytical technique for validating simulation results of the response of c-Si PV module to temperature load is presented. The laminate’s stiffness is found to be governed by the stiffness ratio magnitude of silicon which is the most stressed component. The deformation ratio of EVA is highest and significantly determines the degree of variation of gap between solar cells. The EVA exhibits the highest susceptibility to thermo-mechanical deformation followed by the solder which is found to accumulate the highest magnitude of strain energy density. The research presents an analytical method that can be used to validate the output of computer-simulation of the magnitude of strain energy density of solder in c-Si PV modules.

AB - Reliability and mean-time-to-failure (MTTF) of crystalline silicon photovoltaic (c-Si PV) module operating at elevated temperature can be increased through in-depth understanding of the mechanics of thermo-mechanical deformation and degradation of the laminates bonded together in the system. The knowledge is critical to developing the next generation of robust c-Si PV modules. Deployment in elevated ambient temperature reduces the 25-year design life by inducing excessive deformation that results in significant laminate degradation. The research investigates the thermo-mechanical deformation of c-Si PV module. Analytical and simulation methods are employed in the investigation. The IEC 61215 test qualification is used. Ethylene vinyl acetate (EVA) and solder materials responses are modelled as temperature dependent with appropriate material models. Analytical technique for validating simulation results of the response of c-Si PV module to temperature load is presented. The laminate’s stiffness is found to be governed by the stiffness ratio magnitude of silicon which is the most stressed component. The deformation ratio of EVA is highest and significantly determines the degree of variation of gap between solar cells. The EVA exhibits the highest susceptibility to thermo-mechanical deformation followed by the solder which is found to accumulate the highest magnitude of strain energy density. The research presents an analytical method that can be used to validate the output of computer-simulation of the magnitude of strain energy density of solder in c-Si PV modules.

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DO - 10.1016/j.engfailanal.2017.11.009

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JO - Engineering Failure Analysis

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SN - 1350-6307

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