Thermoactive diaphragm walls have proved their efficiency for near-surface geothermal energy use. To get insights into the heat transfer process occurring between the heat exchanger pipes and the surrounding boundaries, an instrumented real case located in northern Italy was taken as reference. Combining on-site monitoring data with computational simulations, the role of the basement space in governing the heat fluxes in the different seasons, and the energy performance of the diaphragm wall and of the ground source heat pump system, is highlighted. The numerical analysis represents an effective predictive tool, but is also highly sensitive with respect to parameters of uncertain or complex definition, such as the boundary thermal conditions and the thermal input at the pipe inlet. Intermittent operation and idle periods require a refined simulation, discretising the time dependency of the input variables in appropriate short time steps.

中文翻译：

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通过监测评估和数值建模研究能量墙的性能：以意大利为例

热活性隔板墙已证明其在近地表地热能利用方面的效率。为了深入了解换热器管道与周围边界之间发生的传热过程，我们以位于意大利北部的仪器化实际案例为参考。将现场监测数据与计算模拟相结合，强调了地下室空间在控制不同季节的热通量方面的作用，以及隔板墙和地源热泵系统的能源性能。数值分析是一种有效的预测工具，但对于不确定或复杂定义的参数（例如边界热条件和管道入口处的热输入）也非常敏感。