Arid
DOI10.1016/j.applthermaleng.2017.09.130
Numerical simulation on the performance of thermosyphon adopted to mitigate thaw settlement of embankment in sandy permafrost zone
Chen, Lin1,3; Yu, Wenbing1,2; Lu, Yan1; Liu, Weibo1
通讯作者Yu, Wenbing
来源期刊APPLIED THERMAL ENGINEERING
ISSN1359-4311
出版年2018
卷号128页码:1624-1633
英文摘要

Desertification and climate warming have affected the stability of the crushed-rock interlayer embankment of the Qinghai-Tibet Railway (QTR) in the permafrost zone. The two-phase closed thermosyphon (TPCT) is adopted to mitigate the problem in sandy permafrost zone. A composite heat transfer model, including air convection in the crushed-rock interlayer, the air-TPCT-soil coupled heat transfer for TPCTs system and the heat conduction with phase change in the soil layers, is developed based on the equivalent thermal resistance for the TPCf. And an increase in average air temperature by 0.04 degrees C a(-1) was also simulated. The numerical results indicate that TPCTs play rapidly a cooling effect and approach a thermal balance state after 10 years of construction. TPCfs installed at the embankment slope effectively ease the underlying permafrost degeneration and cool down permafrost. However, the cooling scope and magnitude of TPCTs largely depends on working duration after installation. If the mean average air temperature is still lower than -3.5 degrees C after considering climate warming, TPCTs installed at the 10th year of QTR operation can mitigate the negative effect of climate warming and sand accumulation in the sandy permafrost zone of the Qinghai Tibet Corridor. (C) 2017 Elsevier Ltd. All rights reserved.


英文关键词Qinghai-Tibet Railway Climate warming Aeolian sand Permafrost degradation Crushed-rock layer Thermosyphon
类型Article
语种英语
国家Peoples R China ; Canada
收录类别SCI-E
WOS记录号WOS:000414884700151
WOS关键词2-PHASE CLOSED THERMOSIPHONS ; QINGHAI-TIBETAN PLATEAU ; CRUSHED-ROCK ; COOLING PERFORMANCE ; HIGHWAY EMBANKMENT ; GROUNDWATER-FLOW ; HEAT-EXCHANGER ; REGIONS ; TEMPERATURE ; DESERTIFICATION
WOS类目Thermodynamics ; Energy & Fuels ; Engineering, Mechanical ; Mechanics
WOS研究方向Thermodynamics ; Energy & Fuels ; Engineering ; Mechanics
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/207669
作者单位1.Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Frozen Soil Engn, Lanzhou 730000, Gansu, Peoples R China;
2.Chongqing Jiaotong Univ, Coll Civil Engn, Chongqing 400074, Peoples R China;
3.Univ Montreal, Dept Geography, Cold Reg Geomorphol & Geotech Lab, Montreal, PQ H2V 2E8, Canada
推荐引用方式
GB/T 7714
Chen, Lin,Yu, Wenbing,Lu, Yan,et al. Numerical simulation on the performance of thermosyphon adopted to mitigate thaw settlement of embankment in sandy permafrost zone[J],2018,128:1624-1633.
APA Chen, Lin,Yu, Wenbing,Lu, Yan,&Liu, Weibo.(2018).Numerical simulation on the performance of thermosyphon adopted to mitigate thaw settlement of embankment in sandy permafrost zone.APPLIED THERMAL ENGINEERING,128,1624-1633.
MLA Chen, Lin,et al."Numerical simulation on the performance of thermosyphon adopted to mitigate thaw settlement of embankment in sandy permafrost zone".APPLIED THERMAL ENGINEERING 128(2018):1624-1633.
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