Measuring Method of Moisture Ingress into Photovoltaic Modules

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概要

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• The reliability of photovoltaic (PV) modules is related to the ingress of moisture in some cases. We investigated the measurement method of moisture ingress into PV modules. In order to detect the moisture ingress route into the module, cobalt chloride (CoCl2) paper was used. The change in the color of CoCl2 paper is effective in detecting and quantifying moisture ingress. The results suggested that the main route of moisture ingress is along the back material and moisture gradually diffuses to the center of the cell. The rate of moisture ingress into the PV module depends on the water--vapor transmission rate (WVTR) of the back material. The amount of moisture estimated from a calibration curve is correlated to the amount of moisture calculated from the WVTR of the back material.

• 2012-10-25

著者

• Masuda Atsushi

  National Institute of Advanced Industrial Science and Technology (AIST), Tosu, Saga 841-0052, Japan

• Miyashita Masanori

  Photovoltaic Power Generation Technology Research Association (PVTEC), Chiyoda, Tokyo 102-0074, Japan

• Kawai Shinji

  National Institute of Advanced Industrial Science and Technology (AIST), Tosu, Saga 841-0052, Japan

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