Solar thermal power new model "hot" up

Solar thermal power generation technology refers to the use of large-scale array parabolic or dish-shaped mirrors to collect solar thermal energy, provide steam through heat exchange devices, and combine traditional turbine generator technology to achieve power generation. Solar thermal power generation technology is adopted to avoid the expensive silicon crystal photoelectric conversion process, which can greatly reduce the cost of solar power generation. Moreover, this type of solar energy utilization has an advantage that other forms of solar energy conversion cannot match: solar water can be stored in huge containers and can still drive steam turbines for several hours after the sun goes down. .

Solar thermal power generation technology is becoming the focus of another new energy utilization after photovoltaic power generation, and more and more companies are beginning to make large-scale arrangements in this field. On the 12th, Ningxia Hanas New Energy Group invested 225 million yuan in Asia's first trough solar-gas combined cycle (ISCC) power station to break ground in the Yanchi region of Ningxia, and is expected to provide a new model for the development of China's solar thermal power generation industry .

Because the project changed the traditional trough solar thermal power generation model, through the addition of heat storage devices and joint operation with the gas turbine, maximizing the development and utilization of solar energy resources, in China's solar thermal power generation field has important strategic significance and innovative significance.

According to Ma Fuqiang, President of Hanas New Energy Group, the ISCC (Integrated Solar Combined Cycle System) power generation system is a combination of a trough solar thermal power generation system and a gas turbine power generation system, using high-temperature flue gas after solar energy and natural gas power generation. Heating heat sources combined with power generated by the cycle to generate power can avoid the idleness of power generation facilities caused by natural conditions. The overall thermal efficiency of conventional trough solar power plants and conventional gas-steam combined cycle power plants can be increased by 25%. At the same time, the “combined cycle” guarantees stable power supply for the power plant growth time, which can increase the security of the power grid.

Hanas ISCC power station planning capacity of 92.5 MW, is expected to be completed and put into operation in October 2013. After the completion of the project, the estimated annual power generation is equivalent to saving 104,000 tons of standard coal per year. Compared with the conventional power plant with the same power generation, the annual carbon dioxide emission reduction will be 210,000 tons.

People in the industry believe that the launch of the project will bring a number of new projects around solar energy utilization and will form another important new energy base in western China.

Solar thermal power “hot” Solar thermal power generation is a solar energy utilization technology that has just begun industrialization. It is clean, highly efficient, stable and reliable. As technology advances and the industrial system improves, it will gradually increase its technological and economic advantages. The important way to use solar energy.

Solar thermal power generation is also called concentrating solar power generation. It generates heat energy by concentrating solar radiation and converts thermal energy into high-temperature steam-driven steam turbines to generate electricity. According to different solar thermal power generation acquisition modes, solar thermal power generation can be divided into solar trough thermal power generation, solar tower thermal power generation, and solar disk thermal power generation.

Compared with photovoltaic power generation, solar thermal power generation technology first avoids the expensive silicon crystalline photoelectric conversion process, which can greatly reduce the entire power generation cost. In addition, the "storage" link in the solar thermal power generation technology can store the heat energy obtained through a medium in a huge container, which can ensure that the turbine can still drive the power generation with a stable voltage for several hours after the sun goes down. Photovoltaic power generation is difficult to get rid of the "seeing heaven to eat" embarrassment.

In the international arena, the project to vigorously promote solar thermal power generation was born in July 2009. This action, known as the “European Desert Action”, plans to invest 400 billion euros in the next 10 years to establish a series of grid-connected networks in the Middle East and North Africa. Solar thermal power stations to meet Europe's 15% of the electricity demand and part of the electricity demand of the power station location.

In 2009, since the implementation of the renewable energy FiT policy in Spain, the cumulative installed capacity of solar thermal power generation was about 582 megawatts, and the number of projects under construction was over 600 megawatts; the solar thermal power generation project planned by the United States also exceeded 10,000 megawatts. The first solar thermal power station in Asia was completed in August 2010 in Yanqing, Beijing.

In recent years, China has actively promoted the development and utilization of renewable and renewable energy such as wind power and solar energy to reduce its dependence on fossil fuels. The “Twelfth Five-Year” development plan that was released earlier clearly stated that it is necessary to vigorously develop and support the strategic objectives of new energy industries and products, including solar energy. By 2015, China plans to build 5 million kilowatts of grid-connected solar power.

On June 1 of this year, the “Guidance Catalogue for Industrial Structure Adjustment (2011 Edition)” promulgated by the National Development and Reform Commission was formally implemented. Among the new energy categories encouraged in the Catalogue Encouragement category, solar thermal power generation was placed in a prominent position. Experts predict that in the future, the capacity of solar thermal power generation will greatly exceed that of photovoltaics. Under the general trend of global low-carbon economy and new energy revolution, light-heating electrodes may become the most dominant energy source in China's future.

New energy development model Since the ISCC system R&D was put into use in the 1990s, it has been successfully operated in Egypt, the United States, and other countries, which proves that the system is suitable for areas with rich light and heat and oil and gas resources, and is widely used in western and northern China. Application prospects.

The Hanas ISCC power station is currently operating as a demonstration project. Ma Fuqiang believes that the introduction of this system by the group will accumulate experience for large-scale commercial operations in China.

According to industry insiders, solar thermal power generation will be commercialized in China in the next 5-10 years. It should be pointed out that if the solar thermal power generation system is to be fully commercialized, it needs to ensure low-cost investment and technically high reliability operation.

Ma Fuqiang repeatedly emphasized the Hanas ISCC power station demonstration significance. The main reason is that CSP has not formed industrialized development in China. Currently, there are problems such as the unsound industrial chain, the inability of self-reliance of key technologies, and high costs. According to industry insiders, currently only two companies in the world can mass-produce trough heat receivers, which are Siemens in Germany and Schott Solar in Germany. Therefore, Hanas chose North China Electric Power Design Institute and Siemens to help build the project.

Of course, with the development of the industrial chain, the realization of mass production and scale, the cost will be reduced, and the future development of China's entire solar thermal power generation industry will be even better.

The National Energy Administration believes that the completion of the project will fully realize the coordinated development of renewable energy and clean energy, help improve the local energy structure, support the improvement of power quality, meet the electricity demand of Ningxia, and improve the local integrated energy system. It is also hoped that this project of Hanas will play an important role in the demonstration of the design, construction, operation and management of solar thermal power generation in China, and hopes to build a solar thermal power generation demonstration project with advanced technology and good economy.

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