气候变化领域集成服务门户(CCPortal): Characteristics of heat fluxes of an oil pipeline armed with thermosyphons in permafrost regions

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DOI	10.1016/j.applthermaleng.2021.116694
	Characteristics of heat fluxes of an oil pipeline armed with thermosyphons in permafrost regions
	Chen, Lin; Yu, Wenbing; Lu, Yan; Wu, Pan; Han, Fenglei
通讯作者	Yu, WB (通讯作者)，Chongqing Jiaotong Univ, State Key Lab Mt Bridge & Tunnel Engn, Chongqing, Peoples R China. ; Chen, L (通讯作者)，Univ Montreal, Dept Geog, Montreal, PQ H2V 2B8, Canada.
发表日期	2021
ISSN	1359-4311
EISSN	1873-5606
卷号	190
英文摘要	Permafrost degradation negatively affects the thermal stability of northern infrastructure. The quantification of heat loss through a buried oil pipeline is imperative to determine the thermal interaction between the pipe and underlying permafrost. However, the magnitudes and patterns of heat flux have not been studied methodically. This study quantifies how lateral and vertical heat fluxes from a buried warm oil pipeline increase the permafrost thawing rate and promote talik (Le., bodies or layers of unfrozen ground in permafrost areas) development in subarctic regions by employing a three-dimensional conductive heat transfer model. In addition, the sensitivities of daily and annual heat fluxes to insulation thickness and its thermal conductivity were determined. Simulated results indicate that the heated oil pipeline acts as a heat source with the maximum daily heat flux of 6.7 W/m(2) and maximum annual heat flux of 4.3 W/m(2). The mean annual heat flux exponentially decreases with increasing insulation thickness, while has a logarithmical increase with the increase of the thermal conductivity of insulation material. For an insulated (0.04-m thickness) oil pipeline, a fast-growing talik initiates and enlarges laterally and vertically over time. By contrast, two-phase closed thermosyphons can be used as a remedying measure to mitigate the accelerated permafrost thaw around a buried oil pipeline. Thermosyphons increase the lateral daily heat flux by an average of 0.5 W/m(2) and lower mean annual soil temperature at depth by an average of 2 degrees C. Within the context of climate warming, we expect that talik beneath the oil pipeline will enlarge faster than previously estimated in the coming decades due to the adverse effects of the subsurface water flow. The net founding of our results is applicable to improve the engineered design and assess the vulnerability of the oil pipeline in cold regions.
关键词	2-PHASE CLOSED THERMOSIPHON QINGHAI-TIBET PLATEAU COOLING PERFORMANCE FOUNDATION SOILS THAW EMBANKMENT JIAGEDAQI SECTION SYSTEM ROUTE
英文关键词	Buried oil pipeline; Permafrost degradation; Talik formation; Heat flux; Snow insulation; Two-phase dosed thermosyphon
语种	英语
WOS研究方向	Thermodynamics ; Energy & Fuels ; Engineering ; Mechanics
WOS类目	Thermodynamics ; Energy & Fuels ; Engineering, Mechanical ; Mechanics
WOS记录号	WOS:000640357800005
来源期刊	APPLIED THERMAL ENGINEERING
来源机构	中国科学院西北生态环境资源研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/254779
作者单位	[Yu, Wenbing; Han, Fenglei] Chongqing Jiaotong Univ, State Key Lab Mt Bridge & Tunnel Engn, Chongqing, Peoples R China; [Chen, Lin; Yu, Wenbing; Lu, Yan] Chinese Acad Sci, State Key Lab Frozen Soil Engn, Northwest Inst Ecoenvironm & Resources, Lanzhou, Peoples R China; [Chen, Lin] Univ Montreal, Dept Geog, Montreal, PQ H2V 2B8, Canada; [Wu, Pan] Wuhan Ctr China Geol Survey, Wuhan 430205, Peoples R China
推荐引用方式 GB/T 7714	Chen, Lin,Yu, Wenbing,Lu, Yan,et al. Characteristics of heat fluxes of an oil pipeline armed with thermosyphons in permafrost regions[J]. 中国科学院西北生态环境资源研究院,2021,190.
APA	Chen, Lin,Yu, Wenbing,Lu, Yan,Wu, Pan,&Han, Fenglei.(2021).Characteristics of heat fluxes of an oil pipeline armed with thermosyphons in permafrost regions.APPLIED THERMAL ENGINEERING,190.
MLA	Chen, Lin,et al."Characteristics of heat fluxes of an oil pipeline armed with thermosyphons in permafrost regions".APPLIED THERMAL ENGINEERING 190(2021).