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针对冬夏季负荷不平衡时集群竖埋管地埋管换热器区域地下土壤冷/热量累积问题,提出低负荷季节只运行较为中心区域埋管的分区运行方法以减缓冷/热量累积效应。以夏季负荷大于冬季负荷为例进行分析,发现只运行较为中心区域部分的埋管时,土壤最高温度和平均温度均较未分区运行时显著下降,可有效抑制地下热量累积效应。分析还表明当土壤导热系数较小时,采用分区运行方法对抑制和减缓地下冷/热量累积效应更为有效。上述结论同样适用于冬季负荷大于夏季负荷的情况。
Aiming at the accumulation of underground soil heat / heat in the vertical tube heat exchanger of vertical pipelines in winter and summer when the load is unbalanced, it is proposed that only sub-zone running methods should be used to reduce the cumulative effect of cold / heat accumulation during the low load season. Taking the summer load greater than the winter load as an example, it is found that when only the more central part of the pipeline is operated, the maximum temperature and the average temperature of soil are significantly lower than those of the un-zoned run, which can effectively suppress the cumulative effect of underground heat. The analysis also shows that the zonal operation method is more effective in suppressing and slowing the accumulation of underground cooling / heat when the soil thermal conductivity is small. The above conclusion also applies to winter load is greater than the summer load situation.