Shencheng's first solar photovoltaic power generation sound barrier has been built on the section of the Changjiang South Road to Yingao West Road of the Rail Transit Line 3. It was officially put into operation yesterday to deliver green electricity to the site lighting, generating 5,000 degrees per year. Professor Zhao Chunjiang, director of the Solar Energy Research Institute of Shanghai Electric Power College, made an overall design for this demonstration project. He also developed the first home solar power system in Shanghai on the roof of his house, but the green power has not been acquired yet.
The Municipal Development and Reform Commission recently issued the “Interim Measures for the Management of Shanghai Solar Photovoltaic Power Generation Projectsâ€, which will be piloted from December 1 this year. Individual development and utilization of photovoltaic power generation has been followed by principles.
Professor Cui Rongqiang, chairman of the Shanghai Solar Energy Society, said that relevant departments should quickly come up with a specific plan to purchase green electricity from home solar power plants to support the compliance of the green power into the grid.
Rail green power for site lighting
The appearance of the solar sound barrier is significantly different compared to the normal milk white plastic panel sound barrier. Below this barrier, a piece of brown amorphous silicon solar panel replaces the plain plastic sheet. The height of the panels is 0.84 meters and the length is different. The longest piece is 1.9 meters long. The panels share 223 blocks, forming a square array of solar cells with a total length of about 360 meters.
On average, the area of ​​each panel is about 1 square meter. A small DC power junction box is installed on the battery board, and the battery boards are connected to each other through the junction box. The green power generated by the solar energy can be continuously input into the internal local power grid of Shanghai Metro Operation Co., Ltd. Channel lighting and guide card lighting.
It is worth mentioning that this solar energy photovoltaic barrier with a total investment of more than 600,000 yuan, the annual power generation is expected to reach 5000 degrees without emissions. Compared with thermal power generation, it is equivalent to reducing carbon dioxide emissions by about 3,500 kg per year. Moreover, its security measures are automatically carried out by the system itself, without the need for personnel to be on duty.
According to reports, the solar photovoltaic power generation sound barriers suitable for rail transit and highways are relatively simple to configure and convenient to construct, and have been promoted in some large foreign cities. A manager of Shanghai Metro Operation Co., Ltd. believes that if the construction cost of solar photovoltaic power generation sound barriers is further reduced, it is expected to be promoted and applied on more rail transit lines in Shencheng.
Family green electricity has not been acquired
Before designing the solar sound barrier system, Professor Zhao Chunjiang, director of the Solar Energy Research Institute of Shanghai Electric Power College, spent 122,000 yuan to build the first home solar power station in Shanghai on the roof of his house. It has been running for nearly 700 days without faults and generating 5900. degree. Relevant persons from the East China Regulatory Authority of the State Electricity Regulatory Commission applauded Zhao Chunjiang's research and development results after reviewing the on-site facilities.
Zhao Chunjiang's duplex residence has a loft. The small attic has laptops, thermometers, sensors and other facilities that automatically record power generation. The 3,000-watt solar cell array made up of 22 photovoltaic panels is installed at the top of the attic. . To build such a family solar power station with an annual green electricity output of about 3,000 degrees, the total investment will generally cost 150,000 yuan. However, after Zhao Chunjiang’s small power station was put into use on December 15, 2006, the green power generated has not been acquired yet.
At present, the electricity cost for electricity in Shanghai is 0.617 yuan per kWh. The use of solar energy for small toys such as garden lights and lawn lamps is not expensive. The service life of solar panels is more than 20 years, and the price of garden lamps is about 5000-8000 yuan. If used 10 hours a night, the cost of use is equivalent to that of electric lights. If it is a lawn lamp that sells for less than 1,000 yuan, the cost of use is much cheaper than that of an electric lamp. Although the household solar power station has long-term energy-saving, it has a large one-time investment. Obviously, green electricity has no support and cannot enter the homes of the people.
Solar power needs specific support
The solar radiation in the Shanghai area is higher than that of the solar energy application countries Germany and Japan, and is suitable for promoting solar energy application technology. The solar power station in Qianwei Village of Chongming Island was connected to the grid last year. This is the largest solar photovoltaic power station in China, with an average annual green electricity supply of about 1.07 million kWh, which can be used by thousands of households.
In Germany, the government buys solar power from residents at a rate of 0.55 euros per kWh. In Japan, the cost of installing solar power equipment by residents is 50% subsidized by the government. China's "Renewable Energy Law" stipulates: The state encourages units and individuals to install and use solar energy utilization systems such as solar photovoltaic power generation systems. It is reported that the purchase price of Chongming Green Power has been set at 4 yuan per degree. However, there are no specific rules for policy support for individuals using solar power.
Professor Cui Rongqiang, chairman of the Shanghai Solar Energy Society, said that the emergence of a home solar power station is a good thing. China is the largest producer of solar photovoltaic cells, but 98% of its products are exported to Europe. After the financial tsunami, the euro's exchange rate against the renminbi has plummeted, and export companies have suffered huge losses. At present, it is necessary to introduce support policies to expand the domestic demand for solar cells. Relevant departments at the local level should also quickly come up with a specific plan to purchase green electricity from the household solar power station, support the compliance of the specified green power into the power grid, and purchase the power generated by the full amount according to the cost plus reasonable profits.
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