STUDY ON ATTRITION CHARACTERISTICS OF PARTICLES SUITABLE FOR NEXT GENERATION SOLAR THERMAL POWER GENERATION SYSTEM

Chen Dong, Lyu Hongkun, Ding Liwei, Lai Zhenya, Xiao Gang, Zhu Peiwang

Acta Energiae Solaris Sinica ›› 2024, Vol. 45 ›› Issue (8) : 432-440.

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Acta Energiae Solaris Sinica ›› 2024, Vol. 45 ›› Issue (8) : 432-440. DOI: 10.19912/j.0254-0096.tynxb.2023-0618

STUDY ON ATTRITION CHARACTERISTICS OF PARTICLES SUITABLE FOR NEXT GENERATION SOLAR THERMAL POWER GENERATION SYSTEM

  • Chen Dong1~3, Lyu Hongkun4, Ding Liwei4, Lai Zhenya4, Xiao Gang1~3, Zhu Peiwang1~3
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Abstract

Solid particles have emerged as a promising new heat transfer and storage medium for solar thermal power generation, offering the potential to improve efficiency. Using bauxite inert particles as the research object, a three-chamber attrition test rig was used to obtain the particle attrition resistance and particle size distribution variation rules. The particles experienced a mass loss of approximately 2.5% after 120 hours, and the most effective simulation was achieved when the mass exchange ratio in the particle size distribution evolution model was in accordance with a normal distribution (σ=1/2,ds=4d). To extend these findings to the solar thermal power system, an attrition conversion coefficient was proposed using attrition dissipation energy as an intermediate quantity. Using a 100 kWe system as an example, it’s calculated that one cycle of bauxite inert particles between the system devices is equivalent to 0.0114 hours of operation in a three-chamber attrition test rig. These findings offer valuable insights for the calculation of long-term system economics and the development of operating strategies.

Key words

solar thermal power generation system / attrition characteristics / thermal storage particle / size distribution / inert solid particles / operation strategy

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Chen Dong, Lyu Hongkun, Ding Liwei, Lai Zhenya, Xiao Gang, Zhu Peiwang. STUDY ON ATTRITION CHARACTERISTICS OF PARTICLES SUITABLE FOR NEXT GENERATION SOLAR THERMAL POWER GENERATION SYSTEM[J]. Acta Energiae Solaris Sinica. 2024, 45(8): 432-440 https://doi.org/10.19912/j.0254-0096.tynxb.2023-0618

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