Optimum design of thermosyphon evaporators for roadway embankment stabilization in the arctic regions

Kukkapalli, Vamsi Krishna; Kim, Jin-Ho; Kim, Sunwoo

doi:10.1007/s12206-021-0941-1

Cited by 6 publications

(2 citation statements)

References 33 publications

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“…Pei et al [23,24] established a series of highway embankment geotemperature models, and evaluated the cooling effect of L-shaped TPCTs and the influence of the installation position on the spatial heat control. Kukkapalli et al [25] developed some roadway embankment models with differently shaped TPCTs to seek an optimal spacing between TPCTs. Two-phase closed thermosyphon (TPCT) uses the principle of thermosyphon to drive the working medium in the TPCT (e.g., freon, ammonia, propane) to continuously generate vapor-liquid two-phase convective circulation.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Settlement Characteristic of Warm Permafrost Embankment with Two-Phase Closed Thermosyphons in Daxing’anling Mountains Region

Wang

Bi²,

Fan³

et al. 2022

Sustainability

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The Xing’anling Mountains are the second largest permafrost region in China. One of the important issues for highways in these regions is how to control the settlement during the operation period to meet the demand of road stability. This paper selects a typical permafrost embankment in the Daxing’anling Mountains permafrost region, presents the finite element models of the embankment, and verifies it using field monitoring data to study the thermal and deformation characteristics within 50 years after construction. Calculation results illustrate that the permafrost under the embankment has degraded significantly during the operation period of the highway and led to serious settlement. To prevent the degradation of permafrost, a series of models with two-phase closed thermosyphons (TPCTs) were established to analyze the cooling effect. The contribution of different factors, including install locations, depth, and shapes of the TPCTs, were assessed on their effects on cooling the permafrost and reducing the embankment settlement. Results show that the TPCTs have an excellent cooling effect on the permafrost embankment. However, as the TPCTs change the temperature distribution of the embankment, they will inevitably cause differential settlement. In order to ensure the cooling effect and reduce the differential settlement of the embankment, it is suggested that L-shaped TPCTs should be adopted in the remedial engineering.

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Section: Introductionmentioning

confidence: 99%