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Study of Sub-cooled Water Temperature on the Interface Wave for Direct Contact Condensation in a Micro Channel(PDF)

《南京师大学报（自然科学版）》[ISSN:1001-4616/CN:32-1239/N]

Issue:
2022年01期
Page:
22-31
Research Field:
·物理学·
Publishing date:

Info

Title:
Study of Sub-cooled Water Temperature on the Interface Wave for Direct Contact Condensation in a Micro Channel
Author(s):
Hou Nana1; 3; 4; Li Shuqian1; 3; 4; Zhang Dong2; Zhang Qiangwu2; Ma Kunru2
(1.The Civil Engineering College,Hebei University of Water Resources and Electric Engineering,Cangzhou 061001,China)(2.The Construction Engineering College,Hebei University of Science and Technology,Shijiazhuang 050018,China)(3.Hebei Technology Innovation Center of Phase Change Thermal Management of Internet Data Center,Cangzhou 061001,China)(4.Cangzhou Technology Innovation Center of Thermal Storage and Low-grade Waste Heat Utilization of Electromagnetic Heating,Cangzhou 061001,China)
Keywords:
T-type micro channel; chugging; sub-cooled water temperature; “necking”; “implosion”; condensation frequencies
PACS:
TK124
DOI:
10.3969/j.issn.1001-4616.2022.01.005
Abstract:
The visualization experiments were carried out in order to investigate the influence of sub-cooled water temperature on the chugging for steam direct condensation in a T-ype micro channel. Steam-water interface transient evolution process in 1000ms was obtained through a high-speed camera(5 000 fps),under the condition of steam temperature of 100 ℃,steam volume flow rate 550 μL/min,and sub-cooled water volume flow rate 14 758 μL/min with different sub-cooled water temperature(i.e. 30 ℃,40 ℃ and 50 ℃). The research indicates that there exists continually“necking”and“implosion”during steam bubble condensation in the micro channel. Additionally,steam-water two-phase areas after“implosion”increase,while the condensation frequencies decrease with the increase of sub-cooled water temperature. The changes of times which needed for each chugging period in 1 000 ms are generally consistent with the variation tendency of largest steam-water two-phase areas.

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