The world's only transmission type high power concentrating solar thermal power generation system
Solar thermal power generation, usually called concentrating solar power generation, obtains thermal energy by concentrating solar radiation, converts thermal energy into high-temperature steam, and steam drives turbines to generate electricity. According to the solar energy collection method, it can be mainly divided into trough power generation, tower power generation and dish power generation. According to rough statistics, as of the end of 2017, among the solar thermal power plants built and under construction in the world, the number of trough-type power plants is the largest, accounting for about 80% of the total number of solar thermal power stations built and under construction, and the proportion of tower-type power stations exceeds 11%. The minimum number of disc-type power stations is less than 9%.
The above three solar energy collection methods: trough, tower, and dish, are all reflective, that is, reflect sunlight to the collector. Since these three types of collectors must be installed above the reflector, the technical requirements are very high and the cost is high.
Song Liang, a solar energy expert, invented the transmission-type high-power condenser heating method, which is based on the Fresnel lens principle, and successfully produced the world's largest high-power condenser lens (below), which has the following advantages: 1. Can Made of a large lens with a diameter of several meters, 2. Convergent magnification of more than 1000 times, this lens can be directly heated to 800 degrees Celsius or more. 3. The focus plane is a uniform plane spot. The Fresnel lens has the strongest center spot, and the weaker the light from outside to outside.
If the production technology allows, in fact, the diameter of this lens can be 500 meters, focusing 3000 times, focusing spot area of ​​about 65 square meters, the spot temperature can reach thousands of degrees Celsius instantaneously. This device can be completely used for melting iron and steelmaking, solar steelmaking, environmental protection and energy saving.
The biggest advantage of the transmissive high-power condenser heat collection method over the traditional reflective heat collection method is its low cost because its collector is below the lens. The high-power condenser lens is very suitable for large-scale photo-thermal power generation. It is estimated that the total cost of a solar thermal power station built using this technology is about 40% lower than the total cost of a tower-type solar thermal power station, so the cost of solar thermal power generation is basically the same. Close to photovoltaic power generation, large-scale application of CSP can be realized.
Photovoltaic power generation advantages over photovoltaic power generation: As the heat energy of high-temperature liquids is easy to store, the heat storage system of the solar thermal power station can store excess heat during the day and generate electricity at night, thus realizing 24-hour continuous power supply to the solar thermal power station and ensuring the output current of the power station. Stability will not impact the grid.
If most California deserts are built with transmissive high-powered concentrating solar thermal power stations, the electricity generated will be sufficient to supply electricity throughout the United States, and as low as 8 cents per kWh, this is a very promising undertaking. The United States alone also has a market of several hundred billion U.S. dollars.
In addition, a single high-power condenser lens can also be easily applied in the field for cooking, especially where there is no electricity and no fuel, as long as the large lens can be set up to cook, you can also warm and warm. Solve the life problems of field prospecting, field exploration, and field training.
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