STUDY ON HEAT TRANSFER AND STRESS-PASSING CHARACTERISTICS OFSOLID GRANULES MEDIUM IN HOT BRIQUETTING PROCESS OF PINUS TABULAEFORMIS WASTE

Zhang Yingnan; Zhang Jing; Zheng Decong; Wu Kai; Zhang Xiuquan

doi:10.19912/j.0254-0096.tynxb.2021-0672

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Acta Energiae Solaris Sinica ›› 2022, Vol. 43 ›› Issue (12) : 453-463. DOI: 10.19912/j.0254-0096.tynxb.2021-0672

STUDY ON HEAT TRANSFER AND STRESS-PASSING CHARACTERISTICS OFSOLID GRANULES MEDIUM IN HOT BRIQUETTING PROCESS OF PINUS TABULAEFORMIS WASTE

Zhang Yingnan, Zhang Jing, Zheng Decong, Wu Kai, Zhang Xiuquan

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Abstract

The purpose of this study is to determine the microstructure mechanism of hot pressing of Pinus tabulaeformis waste and verify the microstructure results with experiments. The discrete element software EDEM was selected for micro simulation, and the corresponding heat transfer API was written in C++ language to realize the simulation of hot pressing. The results show that particle displacement and contact force changed with strain, the elastic deformation gradually turned into plastic deformation, the particle displacement in the mold was gradually consistent, however, the whole was disorganized and particles didn't distinguish between upper and lower layers, the contact force surged when the deformation was about 0.5. The greater the pressure on biomass briquetting, the more disordered the contact force and the more obvious the degree of interlacing. The rising rate of particle temperature in mold is related to the degree of microscopic contact, the greater the compression, the faster the temperature rises; The speed of heat transfer was related to the temperature difference, but the final heat transfer time was similar.

Key words

biomass fuels / hot pressing / heat transfer / discrete element / stress-passing / EDEM

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Zhang Yingnan, Zhang Jing, Zheng Decong, Wu Kai, Zhang Xiuquan. STUDY ON HEAT TRANSFER AND STRESS-PASSING CHARACTERISTICS OFSOLID GRANULES MEDIUM IN HOT BRIQUETTING PROCESS OF PINUS TABULAEFORMIS WASTE[J]. Acta Energiae Solaris Sinica. 2022, 43(12): 453-463 https://doi.org/10.19912/j.0254-0096.tynxb.2021-0672

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