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Selective basalt detonation coating absorber for solar collector

The most effective way to improve the efficiency of flat-plate collectors solar energy associated with the use of selective absorbing coatings applied to the surface of the solar collector absorptance.

Promising to provide a selective coatings based on basalt powder (either alone, or as part of the composite). Do basalt cover possible broad area of use: corrosion-resistant coating (inert in acid and alkaline environments, sea water, chemical resistant), heat-resistant, wear-resistant coatings and other uses, such as protective camouflage coatings in the spectral range of infrared radiation.

In the Altai State Technical University in the laboratory of PLMS SHS Materials were obtained iisledovany samples coated with basalt of varying thickness. According to a study to determine the coefficients of absorption of infrared radiation basalt coating applied detonation-gas method with different thickness. He was 0,98–0,99 and refers to the 5 class of materials having the property of absorbing infrared radiation. Reflection on the cover of basalt infrared radiation is 1–6%.

Found:

  1. absorption coefficient depends on the thickness of the coating;
  2. the absorption coefficient increases with increasing coating thickness.

Depending on the effect of the radiation intensity and particle size distribution of the starting powder on the absorption coefficient of infrared radiation can not be traced. Coverage of basalt characterized by high wear resistance, thermal stability, eklogichnostyu, low hygroscopicity. Have good potential to improve the quality of heat and noise insulation.

Pochekaylov Y.Y., Shashev A.V., Yakovlev V.I., Yakovleva N.A.
VPO «Altai State Technical University I.I. Polzunova», Barnaul

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