Mr. Sai Tatapudi Profile

Sai Tatapudi

PhD Candidate at Arizona State Univ

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Author

Publications (8)

SPIE Journal Paper | 13 March 2021

Design and development of outdoor daylight ultraviolet fluorescence imaging setup: an inexpensive tool to detect degradation of photovoltaic modules

Sumaira Ilyas, Muhammad Noman, Fazle Samad, Bushra Mahnoor, Sai Tatapudi, Fahad Zafar, Govindasamy Tamizhmani

JPE, Vol. 11, Issue 02, 025501, (March 2021) https://doi.org/10.1117/12.10.1117/1.JPE.11.025501

KEYWORDS: Ultraviolet radiation, Solar cells, Luminescence, Light sources, Cameras, Visible radiation, Light, Light emitting diodes, Photovoltaics, Thermography

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Proceedings Article | 17 September 2018 Paper

Addressing potential-induced degradation of field-installed PV modules by reducing surface conductivity

Khuram Shahzad, Muhammad Shoaib Khalid, Ahmad Amin, Kiran Israr, Rahmanullah Khan, Jaewon Oh, Sai Tatapudi, GovindaSamy TamizhMani

Proceedings Volume 10759, 1075909 (2018) https://doi.org/10.1117/12.2326777

KEYWORDS: Solar cells, Glasses, Photovoltaics, Electroluminescence, Manufacturing, Reliability, Polymers, Solar energy

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Proceedings Article | 17 September 2018 Presentation + Paper

Outdoor performance of CIGS modules at multiple temperatures over three years

Afshan Qamar, Rafia Akbar, Ankil Sanghvi, Andrey Bednarzhevskiy, Liyuan Liu, Akash Raj, Sai Tatapudi, David Metacarpa, Rajalakshmi Sundaramoorthy, Govindasamy TamizhMani

Proceedings Volume 10759, 1075905 (2018) https://doi.org/10.1117/12.2326702

KEYWORDS: Copper indium gallium selenide, Climatology, Manufacturing, Photovoltaics, Temperature metrology, Thin films, Crystals, Silicon, Data acquisition, Solar cells

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Proceedings Article | 17 September 2018 Presentation + Paper

A novel climate-specific field accelerated testing of PV modules

Sai Tatapudi, Joseph Kuitche, GovindaSamy TamizhMani

Proceedings Volume 10759, 1075908 (2018) https://doi.org/10.1117/12.2326699

KEYWORDS: Ultraviolet radiation, Solar cells, Climatology, Reflectors, Temperature metrology, Photovoltaics, Optical inspection, Electroluminescence, Accelerated life testing

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Failure modes and degradation rates of PV modules in a specific climate are primarily dictated by the module design and field-specific climate stressors such as temperature, UV and humidity. To identify the long-term design issues and predict lifetime of PV modules, the plant owners, investors and researchers typically utilize long-term indoor accelerated tests such as extended/modified IEC 61215 tests. Though the indoor accelerated tests can appropriately be designed for the environmental stressors of a specific climate, several challenges are encountered and they include: capital and operating costs of multiple walk-in environmental and weathering chambers for commercial size modules; only statistically insignificant number of commercial modules can be tested at a time due to size limitation of the chambers, and; multiple climate-specific temperatures and multiple humidity profiles used in the long-term accelerated tests prevent performing conventional IEC 61215 test profiles inside the same chamber. All the above-mentioned challenges can be adequately addressed using a novel climate-specific field accelerated testing setup presented in this work. This test program has been designed specifically for the hot-dry desert climate where the environmental stressors are temperature and UV with little or no influence from humidity. This program can easily be modified for the other climatic conditions, e.g. test setup for a hot-humid condition can include temperature, UV and humidity. In the current outdoor accelerated test program for hot-dry desert climate, the temperature acceleration is achieved by inserting heavy thermal insulators on the backside of the modules and the UV acceleration at higher operating temperatures are achieved by using a V-trough solar concentrator on the thermally insulated PV modules installed on a 2-axis tracker. An acceleration factor of about 12-15 is expected depending on the activation energy of the climate-specific degradation mechanism, e.g. encapsulant browning and solder bond degradation.

Proceedings Article | 17 September 2018 Presentation + Paper

Risk priority number for PV module defects: influence of climatic condition

Sai Tatapudi, Prasanna Sundarajan, Cara Libby, Joseph Kuitche, GovindaSamy TamizhMani

Proceedings Volume 10759, 1075907 (2018) https://doi.org/10.1117/12.2321597

KEYWORDS: Safety, Climatology, Solar cells, Photovoltaics, Databases

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Proceedings Article | 23 August 2017 Paper

Temperature coefficient of power (Pmax) of field aged PV modules: impact on performance ratio and degradation rate determinations

Farrukh Mahmood, Hatif Majeed, Haider Agha, Saddam Ali, Sai Tatapudi, Telia Curtis, GovindaSamy TamizhMani

Proceedings Volume 10370, 1037008 (2017) https://doi.org/10.1117/12.2281840

KEYWORDS: Solar cells, Resistance, Optical testing, Photovoltaics, Reliability, Manufacturing, Temperature metrology

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Proceedings Article | 23 August 2017 Paper

Mitigation of PID in commercial PV modules using current interruption method

Birinchi Bora, Jaewon Oh, Sai Tatapudi, Oruganty Sastry, Rajesh Kumar, Basudev Prasad, Govindasamy Tamizhmani

Proceedings Volume 10370, 103700D (2017) https://doi.org/10.1117/12.2281112

KEYWORDS: Glasses, Solar cells, Reliability, Photovoltaics, Adhesives, Electroluminescence, Manufacturing

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Proceedings Article | 8 October 2014 Paper

Angle of incidence effects on soiled PV modules

J. John, V. Rajasekar, S. Boppana, S. Tatapudi, G. Tamizhmani

Proceedings Volume 9179, 91790D (2014) https://doi.org/10.1117/12.2063351

KEYWORDS: Solar cells, Solar radiation models, Silicon, Photovoltaics, Autoregressive models, Interfaces, Crystals, Glasses, Statistical modeling, Temperature metrology

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Showing 5 of 8 publications

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