地温规律及其可恢复特性增强传热研究

利用间歇过程，恢复地下温度，弥补土壤传热慢特点。在地源热泵地能应用中，提高地下换热能力，减少井数，最大地发挥每一换热单元的换热能力。实验是在建造的两口分别为100m和200m竖直换热井的地漂热泵系统上完成，并分别进行了自然状况地下温度分布、连续运行地温变化规律和间歇性地温变化规律的试验研究工作。着重对间歇性恢复过程地温变化趋势进行了研究。间歇时间可以改变温度变化规律和趋势，实现更佳的热泵运行工况。因此，文中提出的可控间歇技术对未来发展利用地能供热供冷系统具有重要意义和应用价值。

Ground Temperature Property and Restorative Characteristics to Enhance Heat Transfer in GSHP

Through an intermittent process (GSHP on or off), the ground temperature can be restored to enhance heat transfer in the soil and to decrease the number of wells (such as vertical boreholes) in the Ground Source Heat Pump (GSHP). In the test system of GSHP, both vertical boreholes (100m and 200m) for heat exchangers were established. Some behaviors and Characteristics were investigated, such as the ground temperature distribution in the initial case, the temperature variation in the working condition, and the temperature fluctuation in the intermittent process. Moreover, the investigation on the trend of restorative ground temperature in the intermittent process was emphasized. The intermittent time can change the trend of the temperature, prolong the underground heat transfer and result in the better working condition of GSHP. A method of using intermittent process was presented to make better use of ground source energy and the fact was pointed out that the intermittent controlling technology is very important in the utilization of ground source energy.