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Dr. Hongjie Hu / 胡紅杰

   

Dr. Hongjie Hu / 胡紅杰

China PV Downstream Technical Leader & Market Development Manager

DuPont Photovoltaic and Advanced Materials

 Education:

 

  • Doctor degree of Materials Science, Chinese Academy of Sciences

 

 Experiences:

 

Dr. Hongjie Hu is a Technical Leader and Market Development Manager for DuPont Photovoltaic and Advanced Materials in China. In this role, he is involved in developing solar panel backsheet applications, leading reliability studies and building up the national and industrial code & standards to support greater durability and lower LCOE for solar panels. He has conducted extensive research on PV materials and technologies, international and local PV Code & Standards, and failure models and mechanisms of solar panel materials. He initiated field studies of large-scale solar farms in China and conducted comparison study with lab accelerated aging tests to evaluate long-term materials performance. He graduated from the Chinese Academy of Sciences with Ph. D. in Materials Science and then joined DuPont in 2011 as Research Scientist. He is based in Shanghai.

 

 Abstract:

 

Topic:Environmental Stresses and Material Field Failure Analysis of Photovoltaic Installations / 光伏電站的典型環境應力与材料失效模式分析

The China PV market grew rapidly in 2017 with 53GW new installation while which is only 35GW in 2016. However, with the high-speed market growth, frequent quality issues have been reported and caused extensive attentions. However, along with the high-speed development, some basic analyses about specific environmental stresses and field failure mechanisms/root causes need to be assessed. Module and material selection for different application environment were not well considered and some inferior materials have been used due to endless cost-down pressure. A field investigation by DuPont of about ~300 installations (range from newly installed to 30+ years old and module types including mono, poly, fixed, tracking, glass/backsheet, glass/glass, bifacial, over-water, etc.) has revealed high module visual failure rate of 22.3%., while cell and backsheet rank top 2 high failure rate. Solar cell corrosion and hot spot, EVA browning and delamination, and backsheet yellowing, cracking and thickness erosion were found in solar farm fields and counted into statistical analysis. Most of these failures are material matters to some extent. To understand failure mechanisms, solar farm power generation analysis, field module lab destructive analysis and environmental stresses analysis were conducted and their relations were correlated.

 

 

 

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