STUDY ON ATTRITION CHARACTERISTICS OF PARTICLES SUITABLE FOR NEXT GENERATION SOLAR THERMAL POWER GENERATION SYSTEM
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.
solar thermal power generation systemattrition characteristicsthermal storage particlesize distributioninert solid particlesoperation strategy
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