Application of a model to investigate the effective thermal conductivity of randomly packed fusion pebble beds

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• 作者：Xiaoliang Wang ; Jie Zheng ; Hongli Chen ; ^{hlchen1@ustc.edu.cn" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Effective thermal conductivity ; Fusion pebble bed ; Random packing ; Gas flow ; Thermal radiation
• 刊名：Fusion Engineering and Design
• 出版年：2016
• 出版时间：May 2016
• 年：2016
• 卷：106
• 期：Complete
• 页码：40-50
• 全文大小：2863 K

文摘

In our precious study, a prediction model, which calculates the effective thermal conductivity k_eff of mono-sized pebble beds, has been developed and validated. Based on this model, here the effects of these influencing factors such as pebble size, thermal radiation, contact area, filling gas, gas flow, gas pressure, etc. on the k_eff of randomly packed fusion pebble beds are studied and analyzed. The pebble beds investigated include Li₄SiO₄, Li₂ZrO₃, Li₂TiO₃, Li₂O, Be and BeO pebble beds. In the current study, many important and meaningful conclusions are derived and some of them are similar to the existing research results. Particularly, some critters that under which conditions the effect of some influencing factors can be neglected or should be considered are also presented.