Gravity heat pipe system has been proposed as a new technology for deep geothermal utilization. However, its performance advantages in heat extraction performance are not fully understood. This study carries out a comparative analysis on heat extraction performance between gravity heat pipe system and enhanced geothermal system through building a 3D thermal-hydraulic coupled model. It is found that the two technologies increase heat extraction ratio and compensation ratio in smaller reservoir side. Gravity heat pipe system has higher effective heat extraction ratio and compensation ratio, while enhanced geothermal system has higher heat extraction rate, cumulative heat extraction, heat extraction ratio and cumulative compensation.

重力热管系统已被提出作为深部地热利用的新技术。然而，其在排热性能方面的性能优势尚未完全了解。本研究通过建立3D热工水力耦合模型，对重力热管系统和强化地热系统的排热性能进行对比分析。发现这两种技术在较小的储层侧提高了热提取率和补偿率。重力热管系统具有较高的有效抽热率和补偿率，而强化地热系统具有较高的抽热率、累计抽热率、抽热率和累计补偿率。