气候变化领域集成服务门户(CCPortal): Numerical evaluation of the cooling performance of a composite L-shaped two-phase closed thermosyphon (LTPCT) technique in permafrost regions

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DOI	10.1016/j.solener.2018.11.001
	Numerical evaluation of the cooling performance of a composite L-shaped two-phase closed thermosyphon (LTPCT) technique in permafrost regions
	Pei, Wansheng; Zhang, Mingyi; Yan, Zhongrui; Li, Shuangyang; Lai, Yuanming
发表日期	2019
ISSN	0038-092X
起始页码	22
结束页码	31
卷号	177
英文摘要	The use of two-phase closed thermosyphons (TPCTs) is an effective energy control technique in permafrost regions due to the specific energy transport process and climate conditions. Under the scenarios of climate warming and engineering activities increasing, how to sufficiently cool permafrost ground to ensure the environmental and engineering stabilities is an important issue. In this paper, the cooling effects of several cooling techniques combined with L-shaped TPCT (LTPCT), innovatively used in an embankment with strong heat-absorption asphalt pavement, are assessed based on a developed 3-D heat transfer model considering the climate warming. The model includes coupled air-LTPCT-soil heat transfer, convective heat transfer and conductive heat transfer with phase change. The numerical results show that the embankment combined with LTPCTs, crushed-rock revetment and insulation is the optimized technique to adjust the thermal exchange process between permafrost ground and ambient. The composite LTPCT technique can effectively cool underlying permafrost mainly during the first few years after construction, and then control permafrost degradation rate by reducing heat absorption in warm seasons and enhancing the ambient energy utilization in cold seasons. Consequently, the technique should be considered for application in low-temperature permafrost regions and other thermal control engineering.
英文关键词	Cooling performance; L-shaped two-phase closed thermosyphon; Energy control technique; Permafrost region
语种	英语
WOS研究方向	Energy & Fuels
WOS类目	Energy & Fuels
WOS关键词	THERMAL PERFORMANCE ; HEAT-TRANSFER ; EMBANKMENTS ; WATER ; OPTIMIZATION ; RATIO
WOS记录号	WOS:000456222500003
来源期刊	SOLAR ENERGY
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/239459
作者单位	[Pei, Wansheng; Zhang, Mingyi; Yan, Zhongrui; Li, Shuangyang; Lai, Yuanming] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Frozen Soil Engn, Lanzhou 730000, Peoples R China; [Yan, Zhongrui] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Pei, Wansheng,Zhang, Mingyi,Yan, Zhongrui,et al. Numerical evaluation of the cooling performance of a composite L-shaped two-phase closed thermosyphon (LTPCT) technique in permafrost regions[J],2019,177.
APA	Pei, Wansheng,Zhang, Mingyi,Yan, Zhongrui,Li, Shuangyang,&Lai, Yuanming.(2019).Numerical evaluation of the cooling performance of a composite L-shaped two-phase closed thermosyphon (LTPCT) technique in permafrost regions.SOLAR ENERGY,177.
MLA	Pei, Wansheng,et al."Numerical evaluation of the cooling performance of a composite L-shaped two-phase closed thermosyphon (LTPCT) technique in permafrost regions".SOLAR ENERGY 177(2019).