| Project/Area Number |
25630438
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Multi-year Fund |
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| Research Field |
Energy engineering
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| Research Institution | Tokyo University of Agriculture and Technology |
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Principal Investigator |
UMEDA Norihiro 東京農工大学, 工学(系)研究科(研究院), 教授 (60111803)
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| Co-Investigator(Kenkyū-buntansha) |
IWAMI Kentarou 東京農工大学, 大学院工学研究院, 准教授 (80514710)
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| Co-Investigator(Renkei-kenkyūsha) |
MASUDA Atsushi 国立研究開発法人産業技術総合研究所, 太陽光発電研究センター, 副研究センター長 (30283154)
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| Project Period (FY) |
2013-04-01 – 2015-03-31
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| Project Status |
Completed (Fiscal Year 2014)
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| Budget Amount *help |
¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2014: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2013: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
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| Keywords | 太陽電池モジュール / 寿命 / 加速試験 / ダンプヒート試験 / エチレンビニールアセテート / 酢酸 / pH感受性蛍光色素 / pH計測 / EVA / ｐH感受性蛍光色素 / メンブレンフィルター / ｐH感受性色素 / ｐH計測 |
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| Outline of Final Research Achievements |
Acetic acid formed via hydrolysis of ethylene vinyl acetate (EVA) as an encapsulant in photovoltaic (PV) modules causes a decrease in conversion efficiency of modules by grid corrosion. To evaluate the condition of PV modules, a nondestructive and simple optical method is proposed. This method uses a dual wavelength pH-sensitive fluorescent dye to detect acetic acid in PV modules using the change in pH. The change in pH induced by the formation of acetic acid is detected by the change in the ratio of fluorescent intensities of two peaks of a dye. A pH-sensitive fluorescent dye showed sensitivity for small amounts of acetic acid such as that produced from EVA. Furthermore, a membrane filter dyed with pH-sensitive fluorescent dye was confirmed to detect acetic acid included in aged EVA after a damp heat test (85℃, 85%) for 5000 h in PV modules.
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