王恩琦等研究发现增大管间距可以削弱管间短路效应，管道直径越大，钻孔热阻

Wangen Qi et al found that increasing the tube pitch can weaken the effect of short-circuiting, between the larger pipe diameter tube, the smaller the borehole thermal resistance, the greater the thermal conductivity of the backfill material, the smaller the difference in the thermal resistance of different diameters of the bore, can be with a small diameter instead of large diameter to achieve the same heat transfer effect.

Wang Enxuan and other research found that increasing the pipe spacing can weaken the short-circuit effect between pipes, the larger the diameter of the pipe, the smaller the drilling heat resistance, the greater the heat conductivity of the backfilling material, the smaller the difference in thermal resistance of the different diameters of the pipe, so you can use the small pipe diameter instead of the large pipe diameter to achieve the same heat exchange effect.

Wang enqi and other researchers found that increasing the pipe spacing can weaken the short-circuit effect between pipes. The larger the pipe diameter is, the smaller the thermal resistance of the borehole is, the greater the thermal conductivity of the backfill material is, and the smaller the difference of the thermal resistance of the borehole with different pipe diameter is. Therefore, small pipe diameter can be used instead of large pipe diameter to achieve the same heat exchange effect.