竖直单U形地埋管换热器单因素敏感性分析
Single factor sensitivity study of heat exchange performance of vertical single U-tube ground heat exchangers
摘要：
基于竖直单U形地埋管换热器的热渗耦合传热模型，分析了岩土导热系数、岩土体积热容、岩土孔隙率、原始地温、地下水渗流速度、埋管深度、管内流体流量、地埋管进口水温及运行模式等因素对地埋管换热器换热性能的影响。进行了单因素回归分析，拟合得到了单位井深换热量及地埋管出口水温与各个参数的回归方程。
Abstract：
Based on the conduction and groundwater advection coupled model for the vertical single U-tube ground heat exchanger, analyses the influences on heat exchange performance of such factors as thermal conductivity coefficient, volumetric heat capacity and porosity of rock and soil, original ground temperature, groundwater seepage velocity, pipe buried depth, flowrate in pipe, inlet water temperature of buried pipe and operation modes. Conducts a single factor regression analysis, and obtains the relational fitting expression of heat exchange quantity per unit borehole depth and outlet water temperature of buried pipe concerning various parameters.
Keywords:ground heat exchanger, heat exchange quantity per unit borehole depth, outlet water temperature, influencing factor, regression