浅层墙体热通量分析：TDTB条件下热交换效率的影响

In summary, compared with the FTB condition, the heat flux of shallow walls (<9m) under the TDTB condition is significantly lower, and the heat transfer potential is worse, with a greater impact as the wall depth becomes shallower. Therefore, the effect of TDTB on the heat flux of shallow walls is significant. If the FTB condition is used as the basis for wall design, the heat flux level of the wall will be overestimated, leading to inappropriate GHEs pipeline layout. From the analysis results of this section, when designing GHEs under rated building cooling (heating) load conditions, the seasonal variation of ground temperature should be considered, and deeper pipeline burial depth or denser pipeline arrangement should be adopted as much as possible to increase the contact area between the pipeline and the ground, improve the pipeline's response to the ground temperature, reduce the fluctuation of the pipeline's heat transfer, and improve the heat exchange efficiency of GHEs.