在“双碳” 目标导向下，能源结构调整力度加大，地热能、太阳能等新能源得到快速发展。干热岩微观结构复杂、裂隙分布多样，精细描述与表征存在一定难度，需要深入研究。本文以表征单元体(REV) 方法为基础，提出了基于REV 的干热岩节理裂隙粗糙度(JRC) 描述方法，建立了裂隙单元体(REV-JRC) 渗流传热分析模型。根据前述模型，模拟分析了裂隙单元体渗流场和温度场特性。结果发现，裂隙单元体温度场分布随着裂隙结构变化呈现波动性；加大流体注入速度和升高流体温度，裂隙单元体到达稳态的时间缩短，同时流体注入温度过低会导致单元体平均温度降低。本文所做工作可为干热岩可持续开发利用提供一定支撑。

Under the guidance of the “double carbon” goal, the adjustment of energy structure has been strengthened, and new energy sources such as geothermal energy and solar energy have developed rapidly. The microstructure of hot dry rock is complex and the fracture distribution is diverse. It is difficult to describe and characterize it in detail, which needs further study. In this paper, based on the characterization unit volume (REV) method, we propose an method for describing the fracture roughness (JRC) of dry heat rock joints based on REV, and establish a fracture unit body (REV-JRC) seepage and heat transfer analysis model. Based on this model, the seepage and temperature fields of the fracture unit are simulated and analysed. The results show that the temperature field distribution of the fracture unit fluctuates with the change of the fracture structure. Increasing the fluid injection rate and increasing the fluid temperature, the time for the fracture unit to reach the steady state is shortened, while decreasing the fluid injection temperature leads to a decrease in the average temperature of the cell when the fluid temperature decreases. The work done in this paper can provide some support for the sustainable development and utilization of hot dry rock.