Sep 15, 2022 · Crystalline silicon photovoltaic (PV) modules have dominated the photovoltaic market for a long time and the recycling of crystalline silicon PV modules has become a critical
Nov 4, 2021 · This article deals with the use of photovoltaic panels at the end of their life cycle in cement composites. Attention is focused on the properties of cement composite after 100%
Nov 17, 2022 · After heating the PV panel with a microwave, the results showed that removing the glass pane could be conveniently conducted easier than a non-heated panel by about 50-60%
Sep 4, 2024 · In response to these challenges, a thermal–mechanical delamination approach is proposed in this study. The method utilizes controlled heat application (hot air gun) to weaken
Jan 1, 2024 · Additionally, EVA''s volume expansion helps to separate the solar cell from the glass and Tedlar layer. Recovery of intact silicon wafer and glass, low energy requirement and
To effectively separate glass from the PV piece, the penetration of separation reagents into the glass-EVA gap is extremely important. Therefore, the wettability of the medium on glass is an important factor. The PV glass used in this experiment has one side with a rough surface and the other side with a smooth surface.
The separated PV modules are filtered and sieved to obtain a mixture of glass and backsheet strips as well as a mixture of (solar cell + EVA) and backsheet. The glass and backsheet strips can be separated using hot air. Furthermore, an appropriate density reagent can be used to separate (solar cell + EVA) and backsheet.
Meanwhile, three methods separating different layers were compared—the use of 1,2-dichlorobenzene, the use of EGDA, and the direct pyrolysis. Moreover, the effects of temperature, ultrasonic field, and solid/liquid ratio on the glass peeling rate were investigated.
Non-toxic reagent EGDA was used to separate the glass-EVA in photovoltaic modules for the first time. The glass in 20 mm × 20 mm photovoltaic pieces can be separated adequately in 3 h. EGDA can be recycled by filtration to be reused. Solar cells can keep their initial size due to the moderate swelling ability of EGDA.
The glass, backsheet, and solar cells are bonded by EVA film, and the main separation methods include mechanical methods, pyrolysis, and chemical methods (Dias et al., 2021, Granata et al., 2014, Tammaro et al., 2015). The mechanical method separates waste PV modules through crushing and subsequent sorting (Pagnanelli et al., 2017).
Green reagent DMPU was used to separate different layers in photovoltaic modules for the first time. The glass and backsheet in small pieces cutted from photovoltaic modules can be separated adequately in 1.5 h. Pieces of silicon wafer can keep their initial size due to the low swelling ability of DMPU.
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