Tsinghua University's invention patent is aluminum-nitrogen/aluminum solar selective absorption coating, which is the first in the world to prepare ceramic films with low infrared emissivity, aluminum-aluminum nitride absorbing sunlight and desalted aluminum antireflection films by magnetron sputtering with single aluminum cathode. The collector using vacuum tube can be used in cold and low solar radiation, which is very suitable for many climates.
This is a selective absorption coating structure. Each absorption layer is only 10 to 30 nm, and the low emission layer is 150 nm. If we want to reach the level of scientific research, the output will be cut by half.
As for solar photothermal power generation, I omit this part. It concentrates low-density solar energy, generates high-temperature medium by concentrating, and promotes traditional power generation equipment to generate electricity.
Development of solar thermal utilization industry. After breaking through the core technology of solar selective absorption coating, the medium with better performance and price is produced through Industry-University-Research combination.
From 20065438+0 to 2006, the solar thermal utilization industry developed rapidly. In 2006, its sales amounted to nearly 30 billion yuan, providing more than 600,000 jobs. In 2005, the installed capacity of solar water heaters in China was 77% of that in the world. Vacuum tubes account for more than 90% of the world's total output, borosilicate glass accounts for about 70% of the world's total output, and getter accounts for about 95% of the world's total output. It is used for about 65.438+0.9 billion vacuum heat collection tubes and 0.9 billion picture tubes every year. A large number of picture tubes are produced in China, and getters are also produced in China. We are ahead in three aspects.
Form a supporting industrial chain. 300,000 tons of glass, of which 280,000 tons are used for vacuum tubes. Vacuum tube coating production line and supporting equipment 1000, with a production capacity of 200 million, equipped with solar water heaters of about 20 million square meters and supporting equipment. Some key enterprises have carried out technological transformation and improved their equipment level and conditions.
This is a vacuum sawtooth automatic tracking solar collector installed on the wall under the balcony or window. It mainly comprises a heat absorber and a light-transmitting container, wherein the heat absorber is installed in the light-transmitting container; The sunny surface of the light-transmitting container is serrated; The serrated surface is composed of serrated light-transmitting plates; The light-transmitting container consists of a serrated light-transmitting plate and a vacuum shell. The principle of vacuum heat insulation is used to block the heat exchange between the heat absorber and the outside world. The thermal radiation isolation film and insulation layer are used to isolate the heat exchange between the vacuum enclosure and the outside world. Convert linear displacement into angular displacement with universal rotator. Automatic tracking of sunlight to improve thermal efficiency of heat collector. It is a building integrated heat collector with no slope installation, no damage, high vacuum, high cold resistance, simple installation and convenient maintenance. It has the characteristics of modularization and convenient packaging and transportation. The collector is emptied automatically and manually, so that the use of the collector is not limited by the region. Standing by the window can easily scrub the floating ash on the surface of the collector.