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<p>In order to gain an efficient and economical heat extraction, enhanced geothermal systems (EGS) technologies have been applied for the generation of efficient fracture networks in deep geothermal reservoirs. This paper has characterized the heat transfer process and evaluated heat extraction rates of the single fracture model with the application of water flow based on experimental and numerical data. Consequently, the heat extraction rate evaluation for the enhance geothermal systems and relevant impacting factors have been presented, which reveals that there is a hump on the curves of heat extraction rate with time going by. It is concluded that larger fracture aperture shows a higher extraction rate initially and decrease more sharply compared with the heat extraction rate for smaller fracture apertures. This study provides reasonable evaluations of heat extraction rates for water flow in the single fracture, which is significant to the management of enhanced geothermal systems projects.</p>

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Investigations of heat extraction evaluations for the single fracture model from the hot dry rock

  • 期刊论文

  • 发表日期：

    2026年3月9日

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  • Jiawei Li,
  • Yang Yu,
  • Hanzhong Si,
  • Bowen Yao

摘要

In order to gain an efficient and economical heat extraction, enhanced geothermal systems (EGS) technologies have been applied for the generation of efficient fracture networks in deep geothermal reservoirs. This paper has characterized the heat transfer process and evaluated heat extraction rates of the single fracture model with the application of water flow based on experimental and numerical data. Consequently, the heat extraction rate evaluation for the enhance geothermal systems and relevant impacting factors have been presented, which reveals that there is a hump on the curves of heat extraction rate with time going by. It is concluded that larger fracture aperture shows a higher extraction rate initially and decrease more sharply compared with the heat extraction rate for smaller fracture apertures. This study provides reasonable evaluations of heat extraction rates for water flow in the single fracture, which is significant to the management of enhanced geothermal systems projects.