地埋管换热器分区运行对土壤热堆积特性影响的研究

Research on the Influence of ground heat exchanger partition operating on soil heat accumulation

中文关键词: 地源热泵  地埋管换热器  土壤热堆积  分区运行

英文关键词: ground source heat pump  ground heat exchanger  soil thermal accumulation  partition operation

中文摘要:

      为了缓解埋管区域土壤的热量堆积问题,提出了埋管换热器按内中外、块状、间隔三种分区运行的策略,利用CFD软件建立了10×10的井群换热模型,对地源热泵系统在三种分区与不分区运行策略下运行十年进行数值模拟,分析不同分区运行策略对土壤温度分布和土壤热堆积特性的影响。模拟结果可知不分区、内中外分区、块状分区、间隔分区四种运行策略下埋管区域的平均温度分别为：25.23℃、23.31℃、23.06℃、23.28℃,最高温度分别为：40.62℃、32.77℃、40.65℃、38.93℃。可以得出分区运行较不分区运行可以有效缓解热堆积作用,埋管区域整体温度较不分区运行时降低了2℃左右,内中外分区策略可以显著缓解埋管区域热堆积。

英文摘要:

      In order to alleviate soil heat accumulation in the buried area of ground heat pump system, the paper puts forward three partition strategies, inner and outer, block and interval. A model of 10 × 10 wells is established by CFD software. The ground source heat pump system is performed numerical simulation in three kinds of partition and total regional operating strategy for ten years. The effect of different operation strategies on soil temperature distribution is analyzed. The results show that the average temperature of the buried pipe in is 25.23℃、23.31℃、23.06℃、23.28℃, operated by four strategies of total regional , inner and outer, block and interval. The maximum temperature is 40.62℃、32.77℃、40.65℃、38.93℃. The results show that partition operation can reduce the heat accumulation, and overall temperature of the buried pipe area can lower about 2℃. Inner and outer partition strategy can significantly reduce heat accumulation in the buried area.