Numerical simulation on heat transfer characteristics during waste heat utilization after the underground in-situ pyrolysis of tar-rich coal

作者：Li Ma, Mengjie Wu, Qisen Mao, Chang’an Wang, Fu Sheng Yang, Yujie Hou, Zhonghui Duan, Defu Che · 发表于：Numerical Heat Transfer Part A Applications · 年份：2024 · DOI：10.1080/10407782.2024.2344202 · 被引用次数：4 · 研究领域：Coal Properties and Utilization、Rock Mechanics and Modeling、Iron and Steelmaking Processes

A large amount of pyrolysis residue is left in the coal seam after the in-situ pyrolysis of tar-rich coal, which contains rich heat energy. However, there are few numerical simulations on waste heat utilization from in-situ pyrolysis of tar-rich coal at present. This paper mainly focused on the temperature field distribution and heat transfer characteristics of the coal seam in the process of waste heat utilization of tar-rich coal in large spatial scale and over a long period. The effects of cooling medium type, cooling fluid velocity, cooling fluid temperature, fracture distribution and well pattern on temperature field distribution and heat transfer performance of tar-rich coal seam were analyzed by Fluent numerical simulation. The present study can offer theoretical guidance and technical support for large-scale utilization of residual heat from pyrolysis residue of tar-rich coal.