TY - JOUR
TI - Study on heat transfer model theory and numerical simulation used in deep rock in-situ temperature-preserved coring
AU - Wei Zi-Jie
AU - Li Cong
AU - Yu Bo
AU - Luo Wei
AU - Yang Jian-Ping
JN - Thermal Science
PY - 2023
VL - 27
IS - 1
SP - 639
EP - 646
PT - Article
AB - Deep rock in-situ temperature-preserved corers are important when evaluating  and developing deep resources. The core temperature change law is the basis  for realizing thermal insulation coring during coring, and it is explored  from the perspective of the theoretical heat transfer model and numerical  simulation. The results indicate that at a 150°C deep rock temperature, the  theoretical calculation results only have a difference of approximately 4%  compared with the minimum value of numerical simulation. With increasing  core lifting speed, the core cooling range decreases, the power demand for  active thermal insulation decreases. A core lifting speed of 2.5 m/s can  meet the lower energy supply requirements and engineering costs at the same  time. The research results can provide theoretical and technical support for  deep resource mining.