气候变化领域集成服务门户(CCPortal): Effect of length ratios on the cooling performance of an inclined two-phase closed thermosyphon under negative temperature conditions

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DOI	10.1016/j.solener.2020.05.006
	Effect of length ratios on the cooling performance of an inclined two-phase closed thermosyphon under negative temperature conditions
	Yan, Zhongrui; Zhang, Mingyi; Pei, Wansheng; Li, Dongwei; Chen, Ji; Lai, Yuanming
发表日期	2020
ISSN	0038-092X
EISSN	1471-1257
起始页码	600
结束页码	616
卷号	204
英文摘要	Two-phase closed thermosyphons (TPCTs) have been widely used in solar energy utilization. The work presents an optimization of the TPCT used in cooling foundation in permafrost regions. A series of experiments under negative temperature conditions were conducted to investigate the effect of length ratios (LRs, length ratio of the evaporator section to the condenser section) on the cooling performance of the TPCT. Experimental results show that there exists a best LR for each angle, and it varies with the inclination angle. As an example, for the TPCT with 5.0-cm inner diameter, the maximum efficiency can be decreased by 17.3% for the TPCT with the LR of 1.00 compared with the TPCT with the best LR of 1.65. Under the best LR, the efficiency can be raised by 30.2% for the TPCT with the inclination angle of 20 degrees compared with that of 90 degrees. Besides, the best LR also changes with the pipe inner diameter, e.g. the best LR varies from 1.65 to 1.27 when the inner diameter changed from 5.0 cm to 8.1 cm. The results suggest that the equivalent length of the evaporator section should be appropriately lengthened to enhance the cooling performance of TPCTs in permafrost engineering.
英文关键词	Two-phase closed thermosyphon; Length ratio; Cooling performance; Efficiency optimization; Negative temperature conditions
语种	英语
WOS研究方向	Energy & Fuels
WOS类目	Energy & Fuels
WOS关键词	THERMAL PERFORMANCE ; NUMERICAL-SIMULATION ; PERMAFROST REGIONS ; EMBANKMENT ; RAILWAY ; EFFICIENCY ; NANOFLUID ; WORKING ; SYSTEMS
WOS记录号	WOS:000537071700055
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/239568
作者单位	[Yan, Zhongrui; Zhang, Mingyi; Pei, Wansheng; Chen, Ji; Lai, Yuanming] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Frozen Soil Engn, Lanzhou 730000, Peoples R China; [Yan, Zhongrui; Zhang, Mingyi; Chen, Ji; Lai, Yuanming] Univ Chinese Acad Sci, Beijing 100049, Peoples R China; [Li, Dongwei] East China Univ Technol, Sch Civil & Architectural Engn, Nanchang 330013, Jiangxi, Peoples R China; [Chen, Ji] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Beiluhe Observat & Res Stn Frozen Soil Engn & Env, Lanzhou 730000, Peoples R China
推荐引用方式 GB/T 7714	Yan, Zhongrui,Zhang, Mingyi,Pei, Wansheng,et al. Effect of length ratios on the cooling performance of an inclined two-phase closed thermosyphon under negative temperature conditions[J],2020,204.
APA	Yan, Zhongrui,Zhang, Mingyi,Pei, Wansheng,Li, Dongwei,Chen, Ji,&Lai, Yuanming.(2020).Effect of length ratios on the cooling performance of an inclined two-phase closed thermosyphon under negative temperature conditions.SOLAR ENERGY,204.
MLA	Yan, Zhongrui,et al."Effect of length ratios on the cooling performance of an inclined two-phase closed thermosyphon under negative temperature conditions".SOLAR ENERGY 204(2020).