Experimental Study on Dust Removal by High Pressure Air Flow in Mirror of Trough Condenser

Chao LIU; Rilige SU; Yahui WANG; Jianguang ZHANG; Wei SHI

doi:10.16513/j.2096-2185.DE.2409507

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Distributed Energy ›› 2024, Vol. 9 ›› Issue (5) : 59-67. DOI: 10.16513/j.2096-2185.DE.2409507

Application Technology

Experimental Study on Dust Removal by High Pressure Air Flow in Mirror of Trough Condenser

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Abstract

The mirror area dust of solar concentrating system not only reduces the photoelectric conversion efficiency, but also shortens the service life of the system. Therefore, a trough type condenser mirror compressed air dust removal system is built. The crystal structure, size distribution, element types and proportion of the dust particles were analyzed by scanning electron microscope, laser particle size analyzer, X-ray difftometer and X-ray fluorescence spectrometer. Through the compressed air dust removal system, the influence of inlet pressure, mirror inclination and dust removal height on dust removal efficiency is studied. The results show that the particles smaller than 10 μm in diameter account for more than half of the dust particles, and quartz and muscotite are the main material components in the dust particles. The content of elements in the dust particles was significantly different, with the highest content of oxygen, followed by silicon, and the lowest content of hydrogen. The dust removal efficiency increases with the increase of dust removal pressure, the increase of the inclination angle of the mirror arrangement, and the decrease of the dust removal angle and height of the air knife nozzle, and the highest dust removal efficiency can reach 98.94%. At this time, the dust accumulation density of the mirror is 0.03 g/m², and the reflectance is 98.94%.

Key words

trough concentrating heat absorption system / dust particles / material composition / compressed air dust removal / dust removal efficiency

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Chao LIU , Rilige SU , Yahui WANG , et al . Experimental Study on Dust Removal by High Pressure Air Flow in Mirror of Trough Condenser[J]. Distributed Energy Resources. 2024, 9(5): 59-67 https://doi.org/10.16513/j.2096-2185.DE.2409507

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