Coated Steel Tube
Himin is the only production enterprise mastering this advanced technology worldwide
Solar thermal power generation is a very efficient and important aspect of solar utilization. There are mainly four types now in use: trough, tower, dish and Fresnel type power generation.
Coated steel tube and flat anti-reflective coating glass, which are the new development of Himin solar energy group, and mainly used in the area of solar thermal power generation system, are the core components of Fresnel power generation system.
Advantages of Fresnel type power generation:
Firstly, the investment and operating costs on Fresnel power generation system is much lower;
Secondly, the utilization life-span of Fresnel power generation system is longer;
Thirdly, it is easier to maintain, for there are no moving parts in the part of collector.
At present, coated steel tube and flat anti-reflective coating glass developed by Himin solar energy group have been exported to America, German, Spain, Australia, etc.

The application of Himin coated steel tube in the scene of Spain (setup by NOVATEC BioSol from Germany)
Working principle of coated steel tube:
Flat reflective mirrors under the coated steel tube track the sun and reflect the collected energy to the tube which can, by the function of the coating layers outside the steel tube, heat the working fluid inside the tube up to 300350 to produce high-temperature steam, which will force the turbine to operate the power generator.
Features of coated steel tube:

1. High absorption and low emissivity
High-temperature coating technology is exclusively possessed in Himin solar energy group. Absorption and emissivity are up to 97(AM1.5) and 10(300) respectively.
Models and materials of coated steel tube can change on demand of customers.
2. High temperature-resistance and stability
The solar selective absorbing coating on the surface of coated steel tube can work stably for a long time at the high temperature up to 300350. It can endure the high temperature of 400600 in vacuum, while various performances remain stable and reliable.

The operation principle of coated steel tube in Fresnel power generation system

Test result for Himin\'s coated steel tube from one German testing organization by NOVATEC BioSol Company