Prediction and analysis of the development prospec

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Prediction and analysis of the development prospect of high-end photovoltaic curtain wall

with the intensification of competition in the traditional curtain wall industry, the industry profit is diluted, and the threshold is reduced, high-end photovoltaic curtain wall has become the direction of internal transformation of the curtain wall industry

in March 2013, Buffett's industrial Mitek Group acquired Benson Industrial Co., Ltd., which makes curtain walls. Buffett's investment endorsement makes the investment prospect of curtain wall industry more clear

in the curtain wall industry, photovoltaic curtain walls with power generation function are particularly eye-catching

amorphous silicon detonates business opportunities

photovoltaic curtain walls are usually curtain wall materials formed by placing photovoltaic modules between two layers of glass. In addition to the power generation characteristics, it has the same architectural characteristics as other curtain walls

it is understood that at present, photovoltaic curtain walls have two main technical modes: crystalline silicon curtain wall and amorphous silicon curtain wall

compared with crystalline silicon curtain wall, amorphous silicon develops relatively late at present, and the photoelectric conversion efficiency is lower than that of crystalline silicon material, but the photovoltaic module thin film cells used in amorphous silicon curtain wall have good light transmittance, and can also play a role in high temperature and weak light conditions. Compared with the single appearance color of crystalline silicon curtain wall components, amorphous silicon curtain wall components can better integrate with the building facade without affecting the appearance effect of the building, and have also become a new hot spot of market attention

at present

in addition, the lighting conditions in various parts of China are different. In the past, the photoelectric curtain wall was mainly designed to adapt to different lighting conditions through the inclined wall design. With the development of more gears, the size of components is limited, and the loading speed is too fast or too slow. According to the relatively flexible characteristics of thin-film batteries, the maximum light utilization can be achieved directly by oblique inlay in the glass interlayer

for example, the China Construction Building in Changsha is a building with thin-film photoelectric curtain walls. In the glass curtain wall at the top, the amorphous silicon thin film battery is embedded in the glass in a hundred pages shape. The narrow shutter design enables the thin-film battery to achieve a greater tilt angle, which is a common difficulty faced by the third tier cities, and does not affect the indoor lighting and the indoor view

Li Shuishui, chief engineer of China Construction Fifth Engineering Bureau, said that the self-designed photoelectric curtain wall has a construction area of about 2000 square meters and an annual power generation of about 100000 kwh, which can basically meet the lighting power consumption of the public part of the entire China Construction building

photovoltaic light and heat can improve efficiency

at present, the annual use area of building curtain walls in China has exceeded 70million square meters. In Li Shuishui's view, if the photovoltaic curtain wall can reach 10% of the promotion area, the annual power output is equivalent to 10 medium-sized thermal power stations, which can reduce the emission of carbon dioxide by about 4million tons

from the perspective of the industry, with the intensification of competition in the traditional curtain wall industry, the industry profit is diluted and the threshold is reduced, high-end photovoltaic curtain wall has become the direction of internal transformation of the curtain wall industry

take AVIC Sanxin in the curtain wall industry as an example, they have already taken the photoelectric curtain wall as one of the main transformation channels. Industrial solar also shifted its business focus from traditional curtain wall business to photovoltaic building integration year by year, and the gross profit margin of the latter is almost twice that of the former. According to the financial statement data of industrial solar in the first half of 2013, the revenue of photovoltaic building integration project increased from 39.5% to 48.1% year-on-year

however, nationwide, the promotion of photoelectric curtain walls is still very limited. Li Shuishui believes that the reason is that developers have not fully accepted the cost of photoelectric curtain walls, and the whole industry is greatly affected by the national photovoltaic subsidy policy

generally speaking, the cost of adding photovoltaic modules to ordinary curtain walls is about twice that of the original. Li Shuishui said that in order to encourage the development of photovoltaic buildings, the government used the total investment method to calculate the subsidy for photovoltaic buildings. The subsidy was about half of the increased cost of Installing Photovoltaic Modules on curtain walls, but now the government subsidy is also declining after the price of photovoltaic modules has fallen, so now the increased cost of Installing Photovoltaic Modules on curtain walls produced by CSCEC is still 1300-1400 yuan/square meter, The payback period of power generation income is 15 ~ 16 years, so developers are unwilling to choose photoelectric curtain wall for such a long payback period, and the whole industry is still highly dependent on government subsidies

in addition to the government's policy support, Li Shuishui suggested that photovoltaic curtain wall enterprises can develop photovoltaic photothermal products as soon as possible, because only relying on the current low photoelectric conversion efficiency to use solar energy for power generation actually loses the use of a large amount of photothermal energy, while the photovoltaic photothermal integration system can significantly reduce building energy consumption and stimulate the interest of developers. Zhonghua glass () Department

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