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After six ministries and commissions further clarified the application direction of intelligent photovoltaic buildings, the giant enterprises accelerated their steps in this field.

As the world's largest coal production company, thermal power generation company, wind power generation company and coal to oil and coal chemical company, National Energy Group recently demonstrated the core technology display unit platform of CIGS-BIPV for the first time at the 2018 China Xi'an Photovoltaic Industry Development Summit Forum and Exhibition. Ling Wen, General Manager of National Energy Group, also disclosed on the spot that the first batch of mass produced components of the Group's copper indium gallium selenium component company in Chongqing will be produced by the end of this year.

Innovative PV building integration National Energy Group and other central enterprises accelerate the layout

In April this year, the Ministry of Industry and Information Technology, the Ministry of Housing and Urban Rural Development, the National Energy Administration and other six departments jointly released the Action Plan for the Development of Intelligent Photovoltaic Industry (2018~2020) (hereinafter referred to as the "Plan"), in which smart photovoltaic buildings and urban application demonstration are arranged.

The Plan clearly states that in conditional urban building roofs (government buildings, public buildings, commercial buildings, factory and mine buildings, facility buildings, etc.), the way of "government guidance, enterprise voluntary, financial support, and social participation" shall be adopted, or various business models such as renting roofs with social capital, and EMC energy-saving service contract management shall be introduced, Build independent "local consumption" distributed building roof photovoltaic power station and building photovoltaic integrated power station to promote the development of distributed photovoltaic applications.

The further clarification of the national policy direction has enabled many central enterprises to accelerate their layout in this field with the copper indium gallium selenium (CIGS) thin film solar power generation technology as the breakthrough point.

Copper indium gallium selenide (CIGS) thin film photovoltaic power generation refers to the technology of converting light energy into electrical energy by using copper indium gallium selenide thin film solar cells. Compared with crystalline silicon solar cells, copper indium gallium selenium thin film solar cells are characterized by low power attenuation, long life cycle, good weak light power generation performance and good appearance consistency, and are internationally known as "the next generation of very promising new thin film solar cells".

"In recent years, the research and industrialization of copper indium gallium selenium thin film solar cells have made rapid progress, and the world record of conversion efficiency has been constantly refreshed. At present, the highest conversion efficiency record in the laboratory has reached 22.9%." Said Dr. Tang Yang, Green Energy and Building Research Center of National Energy Group.

Especially in architectural applications, copper indium gallium selenium thin film solar cells can be customized to produce components with different colors and patterns, which are suitable for different market application scenarios and requirements, especially to meet the architectural aesthetic needs of architectural designers on colors, specifications, etc. At the same time, because of its low requirements on lighting angle, they can be installed on the facade of buildings.

Innovative PV building integration National Energy Group and other central enterprises accelerate the layout

On December 27, 2016, Shanghai Electric announced that it planned to cooperate with the former Shenhua Group (now the National Energy Group) and Germany Manz on "copper, indium, gallium and selenium technology". In 2017, the three parties cooperated to establish Suzhou ManzNewEnergy, combining Shanghai Electric's advanced equipment manufacturing advantages, Manz's copper indium gallium selenium (CIGS) equipment technology advantages and Yuanshenhua's energy industry advantages. On December 21, 2017, Chongqing Shenhua CIGS thin-film solar cell module project officially started. This enterprise, which is funded by the National Energy Group, Shanghai Electric and Chongqing Liangjiang New Area Strategic Emerging Industry Equity Investment Fund, has an annual output of 306MW, and will become the largest production line of copper, indium, gallium and selenium (CIGS) thin film solar modules in China in the future.

On January 15, 2018, Kaisheng Technology Group Co., Ltd. (hereinafter referred to as "Kaisheng Group"), another central enterprise of China Building Materials, signed a contract with Xuzhou Economic and Technological Development Zone to invest in the construction of the production and equipment manufacturing project of copper indium gallium selenium (CIGS) thin film solar cells. It is reported that the first phase of the project will invest 2 billion yuan to build a 300MW solar cell production line.

In terms of local state-owned enterprises, in December 2017, Tongmei Group from Shanxi, Datong Economic Development Investment Co., Ltd. and Hanergy Group, a private enterprise that has long been in the field of thin-film photovoltaic power generation, announced that their first 50MW production line of joint investment was put into production.

In terms of construction applications, construction central enterprises, including CSCEC, have long been involved in the construction, construction and installation of photovoltaic curtain walls.

According to relevant data from the Ministry of Housing and Urban Rural Development of the People's Republic of China, building energy consumption in China accounts for about 30% of the total energy consumption of the whole society. The huge market prospect of PV building integration attracts enterprises, but whether to speed up the practical application of thin-film batteries in buildings and reduce the cost has become the key to develop this market.

At present, most PV building integration projects install solar PV modules on the facade of the building in the form of photovoltaic curtain walls, while the CIGS-BIPV (Copper Indium Gallium Selenium Film Photovoltaic Building Integration) displayed here directly carries out integrated design and construction of photovoltaic glass, keel, insulation board, etc., taking into account the building functions of wind and rain protection, thermal insulation, sound insulation, etc.

The demonstration project of Biguiyuan Coral Palace commercial complex under construction in Lingshui Li Autonomous County, Hainan Province, has already adopted this kind of colorful copper indium gallium selenium film photovoltaic module on the wall, with a design installed capacity of 92.5kW.

According to the National Energy Group, six physical demonstration projects in Beijing, Jiangsu, Guangdong, Hainan, Sichuan and other provinces and cities will be completed from the second half of this year to the first half of next year.

Ling Wen said that in the future, we will be a very competitive team in the copper indium gallium selenium (CIGS) thin film photovoltaic power generation industry, and will undoubtedly be one of the leaders.

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