ESTIMATION OF GROUNDWATER SEEPAGE VELOCITY AND GROUND THERMAL CONDUCTIVITY BASED ON THERMAL RESPONSE TEST

Wang Changlong; Jiang Tianzhuo; Guo Yanchun; Zhou Xing; Lu Jinli; Sun Yanhong

doi:10.19912/j.0254-0096.tynxb.2024-1964

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Acta Energiae Solaris Sinica ›› 2026, Vol. 47 ›› Issue (3) : 496-504. DOI: 10.19912/j.0254-0096.tynxb.2024-1964

ESTIMATION OF GROUNDWATER SEEPAGE VELOCITY AND GROUND THERMAL CONDUCTIVITY BASED ON THERMAL RESPONSE TEST

Wang Changlong^1,2, Jiang Tianzhuo^1,2, Guo Yanchun², Zhou Xing^1,2, Lu Jinli¹, Sun Yanhong¹

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Abstract

A heat transfer model is established for shallow coaxial ground heat exchanger （SCGHE） based on a composite G-function considering groundwater seepage, and then based on the proposed model and a model ignoring groundwater seepage, an estimation method is proposed to estimate groundwater seepage velocity （u） and ground thermal conductivity （λg） by matching thermal response test （TRT） data. The TRT is simulated under different conditions by a three-dimensional numerical model, which is used to validate the proposed model and method. After a long time, the established model is precise, which basically has higher precision than that of the model based on moving line source theory. The proposed estimation method is feasible： for the studied cases, the errors of estimated λg are basically within 1%, and the errors of estimated u are basically within 8%, but the errors of estimated u are larger for smaller u.

Key words

estimation / thermal conductivity / groundwater flow / thermal response test / shallow coaxial ground heat exchanger

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Wang Changlong, Jiang Tianzhuo, Guo Yanchun, Zhou Xing, Lu Jinli, Sun Yanhong. ESTIMATION OF GROUNDWATER SEEPAGE VELOCITY AND GROUND THERMAL CONDUCTIVITY BASED ON THERMAL RESPONSE TEST[J]. Acta Energiae Solaris Sinica. 2026, 47(3): 496-504 https://doi.org/10.19912/j.0254-0096.tynxb.2024-1964

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