Recently, the Gansu Province Science and Technology Major Special Project led by Dunhuang Shouhang Energy Conservation New Energy Co., Ltd., titled "High-Temperature Molten Salt Concentrated Solar Power Generation and Thermal Energy Storage Peak Shaving Key Technology Research and Demonstration," has successfully passed the acceptance review. Among them, the first topic, "Key Technology and Industrial Application of High-Temperature Solar Absorption Coating for Tower-Type Molten Salt Solar Thermal Power Generation," was jointly participated in by Dunhuang Shouhang Energy Conservation New Energy Co., Ltd., the Lanzhou Institute of Chemical Physics of the Chinese Academy of Sciences, and Shouhang Energy Conservation Solar Thermal Technology Co., Ltd., and has also recently passed the expert review.
The project has developed a nano high-entropy solar absorption coating with a high absorption rate of 0.975, good spectral selectivity, excellent adhesion, thermal shock resistance, and extremely low optical decay rate, which can effectively reduce the average electricity cost and improve power station revenue. The project team, in conjunction with the Xi'an Thermal Research Institute, for the first time both domestically and internationally, completed the thermal performance evaluation of the heat absorption device coating for a hundred-megawatt solar thermal power station and established a testing method. The test results show that the overall performance of the SolarShot1108 high-temperature solar absorption coating is superior to that of the Pyromark2500 coating; the overall heat absorption rate of the SolarShot1108 high-temperature solar absorption coating is about 3.9% higher than that of Pyromark2500. The project also breaks through key technologies such as the preparation of absorption coating for large heat absorption tube screens, on-site repair of coatings at high altitudes, solar concentration curing, and high-altitude optical performance testing, providing technical support for the entire lifecycle of materials.
The research results of the project have been successfully applied in the Dunhuang Shouhang High-tech 10MW and 100MW tower-type solar thermal power stations, as well as the Three Gorges SunSum 100MW tower-type solar thermal power station.
