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- W4308491177 abstract "To accelerate the refreezing time of cast-in-place piles in permafrost regions and improve their long-term stability, this paper proposes a novel TCP based on solar refrigeration. The TCP consists of a solar power system (SPS), a vapor compression refrigeration system (VCRS), and a pile. Then, the cooling effect of the TCP was carried out by the model test and the numerical simulation. The model test results show that both the evaporating temperature and the condensing temperature are positively correlated with the ambient temperature, but the coefficient of performance (COP) is negatively correlated with the ambient temperature. The numerical simulation results show the TCP can significantly shorten the refreezing time. The higher the mean annual ground temperature (MAGT), the more significant the acceleration effect. With the increase in the TCP working time, the pile wall permafrost temperature tends to be stable, and the cooling radius increases continuously. The TCP can restrain the degradation rate of the permafrost table, which can be further reduced by increasing the refrigeration power and the refrigeration tube space. The freezing force between the frozen soil and the pile is enhanced due to the cooling effect of the TCP. The TCP bearing capacity is >1.5 times that of a traditional pile (TP). The effect of improving the bearing capacity of the pile can be achieved by increasing the refrigeration power and refrigeration tube space. The conclusions summarized in this paper can provide references for the design and construction of piles in permafrost regions." @default.
- W4308491177 created "2022-11-12" @default.
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- W4308491177 date "2023-01-01" @default.
- W4308491177 modified "2023-10-15" @default.
- W4308491177 title "Design and cooling performance analysis of the temperature-controlled pile (TCP) in permafrost regions" @default.
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- W4308491177 doi "https://doi.org/10.1016/j.coldregions.2022.103714" @default.
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