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为了研究寒冷地区单U型垂直埋管换热器供暖期岩土体温度场,结合某实际工程,通过40个防护型一线式温度传感器对岩土体温度进行了监测。对监测数据进行修正并分析后得出,地下水渗流能增强热对流,使得岩土体温度变化率升高,这对于地源热泵系统的运行是一个有利的条件;间歇运行可以有效缓解系统连续运行对岩土体温度场产生的不良影响,对于提高热泵系统性能具有重要作用;岩土体温度受到了地下热传导向上的热量补给的影响,因此在模拟计算时不宜将换热井底部设为恒温边界或者绝热边界,应将其作为动态边界条件处理,同时浅层岩土体温度受太阳辐射影响较大,计算时这部分热量也是不能忽略的。
In order to study the temperature field of rock and soil mass in the single U-shaped vertical tube heat exchanger in cold area during heating period, the temperature of rock and soil body was monitored by 40 protective one-line temperature sensors combined with a practical project. After correcting and analyzing the monitoring data, it can be concluded that the seepage flow of groundwater can enhance the heat convection and increase the rate of temperature change of rock and soil, which is a favorable condition for the operation of the ground source heat pump system. Intermittent operation can effectively relieve the continuous operation of the system The adverse effects on the temperature field of rock and soil body plays an important role in improving the performance of the heat pump system. The temperature of rock and soil body is affected by the heat supply on the underground heat conduction, so the bottom of the heat exchange well should not be set as the constant temperature boundary Or the adiabatic boundary, it should be treated as a dynamic boundary condition. At the same time, the temperature of shallow rock and soil body is greatly affected by the solar radiation, which is also not negligible in the calculation.