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地下水源热利用存在诸多问题,其中抽灌井区热贯通导致地能利用的衰减失效已成为逐步显现的问题。针对抽灌井群地能利用长期过程的地下热贯通问题,利用模拟计算手段,分析井群不同抽灌温差作用的抽水温度变化、热贯通差异及热交互影响。结果表明,小温差大流量工况的抽水平均温度在供暖期较高,制冷期较低,具有无可比拟的优势。此外,热贯通发生时间早不意味着热交互程度就严重,反之亦然,须同时对系统运行时间内的抽水平均温度进行实时监测。
There are many problems in the utilization of groundwater heat sources, of which the attenuation failure caused by the heat penetration in the pumping well area has become a gradually emerging problem. According to the underground heat penetration problem of long-range pumping well group, the simulation calculation method was used to analyze the variation of pumping water temperature, heat penetration and heat interaction caused by different pumping and pumping temperature difference. The results show that the average temperature of pumping water in the case of small temperature difference and high flow rate is higher in the heating period and lower in the cooling period, which has an unparalleled advantage. In addition, the hot through time does not mean that the degree of thermal interaction is serious, and vice versa, at the same time, the average pumping temperature during system running time should be monitored in real time.