TY - JOUR
TI - Influencing law of key parameters on the thermal efficiency of single-well closed-loop heat exchanger
AU - Li Jing-Bin
AU - Wang Hao
AU - Li Huan
AU - Guo Chenrui
AU - Yang Dong
JN - Thermal Science
PY - 2024
VL - 28
IS - 2
SP - 1037
EP - 1043
PT - Article
AB - The single-well closed-loop heat extraction technology can realize efficient exploitation of mid-to-deep geothermal resources. A two-dimension heat transfer model is established. The effects of flow rate, inlet temperature, length and diameter of insulated tubing on heat extraction power and outlet temperature were investigated by the two-way absolute grey correlation analysis method. Results indicate that thermal power increases with the increase of displacement and length of insulated tubing, and decreases with the increase of injection temperature, outer diameter of insulated tubing and inner diameter of insulated tubing.