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The long-term hot and cold cycle (20 times) of SDR energy pile was carried out. ... also prepared a PCM energy pile for three temperature cycles using decyl acid and lauric …
We monitored the inlet and outlet water temperature, pile and soil temperature, pore water pressure in the soil, axial force of the pile, and pile head displacement, and …
Based on these measurements, thermal stress and mobilised side shear stress were studied to comprehensively evaluate the performance of the improved energy pile. The results show that the temperature variation of …
With the theory of geotechnical medium circular hole expansion, the elastic and elastic–plastic solutions of radial stress of energy piles caused by temperature change are …
Depending on intended operational requirements or by accident, energy pile groups may be subjected to cyclic and variable thermal loadings. This study presents the …
With the theory of geotechnical medium circular hole expansion, the elastic and elastic–plastic solutions of radial stress of energy piles caused by temperature change are derived in this work and the analytical …
Through laboratory experiments, Liu et al. found that the moisture content of the sand around the energy pile affects the frictional resistance at the pile-soil interface caused by …
In promoting green energy [1], [2], geothermal energy has a great prospect as a sustainable and clean energy source [3], [4].Energy piles [5] are formed by burying heat …
Through laboratory experiments, Liu et al. found that the moisture content of the sand around the energy pile affects the frictional resistance at the pile-soil interface caused by …
Based on these measurements, thermal stress and mobilised side shear stress were studied to comprehensively evaluate the performance of the improved energy pile. The …
This research was designed to investigate the advantages of phase change energy piles over conventional energy piles in terms of bearing performance under …
The changes in heat transfer performance, pile top displacement, thermal strain, and soil pressures at the pile tip and pile side are used to find the influence of multiple cycle …
Yang et al. [11] extensively studied phase change energy piles(The phase change material is encapsulated and introduced into the energy pile as a way to reduce …
In the previous study, the model was validated against a thermal response test of an energy pile without considering the solar collector. The measured inlet temperature of …
4 · Thermal processing conditions were selected as input parameters, such as the heat transfer fluid inlet temperature, flow rate, and number of phase change material (PCM) …
Understanding the heat transfer across energy piles is the first step in designing these systems. The thermal process goes in an energy pile, as in a borehole heat exchanger, …
In the first part of the study, two lab-scaled (30×10 cm) energy piles, surrounded with three layers of insulation, one of the piles has four PCM containers with a melting …
We monitored the inlet and outlet water temperature, pile and soil temperature, pore water pressure in the soil, axial force of the pile, and pile head displacement, and …