Cooling Performance of a Novel Ventilated Slope on Railbed in Permafrost Regions
ABSTRACT The heat absorption of the railbed mainly originates from the embankment slope in permafrost regions. A novel ventilated slope (NVS) with a double‐layer convection channel is proposed and verified. By applying this method to the Qinghai–Tibet Railway (QTR), the annual average temperature at...
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Online Access: | http://dx.doi.org/10.1002/ppp.2222 https://onlinelibrary.wiley.com/doi/pdf/10.1002/ppp.2222 |
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crwiley:10.1002/ppp.2222 2024-09-15T18:29:23+00:00 Cooling Performance of a Novel Ventilated Slope on Railbed in Permafrost Regions Zhang, Zhenyu Wen, Zhi Liu, Youqian Wang, Xinbin Lu, Jinxin Chen, Kun Zhang, Delong Yu, Qihao National Natural Science Foundation of China 2024 http://dx.doi.org/10.1002/ppp.2222 https://onlinelibrary.wiley.com/doi/pdf/10.1002/ppp.2222 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Permafrost and Periglacial Processes volume 35, issue 3, page 384-394 ISSN 1045-6740 1099-1530 journal-article 2024 crwiley https://doi.org/10.1002/ppp.2222 2024-07-25T04:18:29Z ABSTRACT The heat absorption of the railbed mainly originates from the embankment slope in permafrost regions. A novel ventilated slope (NVS) with a double‐layer convection channel is proposed and verified. By applying this method to the Qinghai–Tibet Railway (QTR), the annual average temperature at the 10 cm depth below the embankment slope surface under NVS was reduced by 4.95°C. The freezing index at the 10 cm depth of NVS was 1.78 times higher than that of the slope without any cooling approaches. The numerical simulation results showed that heat was accumulated for the conventional embankment, while heat was released from the railbed after the application of NVS. With the cooling effect of NVS, the 0°C isotherm would rise above the original natural ground surface in the 2nd year after the embankment construction. A low‐temperature region of −2°C would be observed in the underlying permafrost by the 10th year. The underlying permafrost would remain frozen in the 50th year. This study provides a novel method for protecting the underlying permafrost in permafrost regions. Article in Journal/Newspaper permafrost Permafrost and Periglacial Processes Wiley Online Library Permafrost and Periglacial Processes |
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Open Polar |
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Wiley Online Library |
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crwiley |
language |
English |
description |
ABSTRACT The heat absorption of the railbed mainly originates from the embankment slope in permafrost regions. A novel ventilated slope (NVS) with a double‐layer convection channel is proposed and verified. By applying this method to the Qinghai–Tibet Railway (QTR), the annual average temperature at the 10 cm depth below the embankment slope surface under NVS was reduced by 4.95°C. The freezing index at the 10 cm depth of NVS was 1.78 times higher than that of the slope without any cooling approaches. The numerical simulation results showed that heat was accumulated for the conventional embankment, while heat was released from the railbed after the application of NVS. With the cooling effect of NVS, the 0°C isotherm would rise above the original natural ground surface in the 2nd year after the embankment construction. A low‐temperature region of −2°C would be observed in the underlying permafrost by the 10th year. The underlying permafrost would remain frozen in the 50th year. This study provides a novel method for protecting the underlying permafrost in permafrost regions. |
author2 |
National Natural Science Foundation of China |
format |
Article in Journal/Newspaper |
author |
Zhang, Zhenyu Wen, Zhi Liu, Youqian Wang, Xinbin Lu, Jinxin Chen, Kun Zhang, Delong Yu, Qihao |
spellingShingle |
Zhang, Zhenyu Wen, Zhi Liu, Youqian Wang, Xinbin Lu, Jinxin Chen, Kun Zhang, Delong Yu, Qihao Cooling Performance of a Novel Ventilated Slope on Railbed in Permafrost Regions |
author_facet |
Zhang, Zhenyu Wen, Zhi Liu, Youqian Wang, Xinbin Lu, Jinxin Chen, Kun Zhang, Delong Yu, Qihao |
author_sort |
Zhang, Zhenyu |
title |
Cooling Performance of a Novel Ventilated Slope on Railbed in Permafrost Regions |
title_short |
Cooling Performance of a Novel Ventilated Slope on Railbed in Permafrost Regions |
title_full |
Cooling Performance of a Novel Ventilated Slope on Railbed in Permafrost Regions |
title_fullStr |
Cooling Performance of a Novel Ventilated Slope on Railbed in Permafrost Regions |
title_full_unstemmed |
Cooling Performance of a Novel Ventilated Slope on Railbed in Permafrost Regions |
title_sort |
cooling performance of a novel ventilated slope on railbed in permafrost regions |
publisher |
Wiley |
publishDate |
2024 |
url |
http://dx.doi.org/10.1002/ppp.2222 https://onlinelibrary.wiley.com/doi/pdf/10.1002/ppp.2222 |
genre |
permafrost Permafrost and Periglacial Processes |
genre_facet |
permafrost Permafrost and Periglacial Processes |
op_source |
Permafrost and Periglacial Processes volume 35, issue 3, page 384-394 ISSN 1045-6740 1099-1530 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1002/ppp.2222 |
container_title |
Permafrost and Periglacial Processes |
_version_ |
1810470794286858240 |