Evaluating the cooling performance of crushed-rock interlayer embankments with unperforated and perforated ventilation ducts in permafrost regions
文献类型：期刊论文
| 作者 | Zhang, Mingyi; Zhang, Xiyin; Li, Shuangyang; Wu, Daoyong; Pei, Wansheng; Lai, Yuanming |
| 刊名 | ENERGY
 |
| 出版日期 | 2015-12-15 |
| 卷号 | 93页码:874-881 |
| 关键词 | Cooling performance Crushed-rock interlayer embankment Perforated ventilation duct Expressway Permafrost region |
| ISSN号 | 0360-5442 |
| DOI | 10.1016/j.energy.2015.08.059 |
| 通讯作者 | Zhang, Mingyi(myzhang@lzb.ac.cn) |
| 英文摘要 | The crushed-rock interlayer embankment with ventilation ducts has been advocated to stabilize the permafrost stratum under expressways in permafrost regions. This embankment must render better cooling effect than railway embankments because the expressway surface is wider and hotter. To this purpose, the walls of the ventilation ducts need to be perforated. This study evaluates the cooling performance of the rushed-rock interlayer embankments with unperforated and perforated ventilation ducts along an expressway in permafrost regions of the Qinghai-Tibet Plateau. A three-dimensional numerical model is developed based on heat and mass transfer theories. The model includes the coupled heat transfer between air and ventilation duct wall, the air convective heat transfer in crushed-rock layer, and the heat conduction with phase change in soil layers. The numerical results indicate that if the ventilation ducts are perforated and embedded at the top of the crushed-rock interlayer, the cooling effect of the embankment can be greatly enhanced. A good cooling performance can still be achieved even if the centerline spacing of the perforated ventilation ducts is enlarged to 4 m to facilitate the construction. The crushed-rock interlayer embankment with perforated ventilation ducts is a better candidate structure for expressways in permafrost regions of the Qinghai-Tibet Plateau. (C) 2015 Elsevier Ltd. All rights reserved. |
| 收录类别 | SCI |
| WOS关键词 | QINGHAI-TIBET RAILWAY ; LAYER |
| WOS研究方向 | Thermodynamics ; Energy & Fuels |
| WOS类目 | Thermodynamics ; Energy & Fuels |
| 语种 | 英语 |
| WOS记录号 | WOS:000367630200079 |
| 出版者 | PERGAMON-ELSEVIER SCIENCE LTD |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2557123 |
| 专题 | 寒区旱区环境与工程研究所 |
| 通讯作者 | Zhang, Mingyi |
| 作者单位 | Chinese Acad Sci, State Key Lab Frozen Soil Engn, Cold & Arid Reg Environm & Engn Res Inst, Lanzhou 730000, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhang, Mingyi,Zhang, Xiyin,Li, Shuangyang,et al. Evaluating the cooling performance of crushed-rock interlayer embankments with unperforated and perforated ventilation ducts in permafrost regions[J]. ENERGY,2015,93:874-881. |
| APA | Zhang, Mingyi,Zhang, Xiyin,Li, Shuangyang,Wu, Daoyong,Pei, Wansheng,&Lai, Yuanming.(2015).Evaluating the cooling performance of crushed-rock interlayer embankments with unperforated and perforated ventilation ducts in permafrost regions.ENERGY,93,874-881. |
| MLA | Zhang, Mingyi,et al."Evaluating the cooling performance of crushed-rock interlayer embankments with unperforated and perforated ventilation ducts in permafrost regions".ENERGY 93(2015):874-881. |
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来源：寒区旱区环境与工程研究所
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