Influence of smooth heater size on critical heat flux and heat transfer coefficient of saturated pool boiling heat transfer

doi:10.1016/j.expthermflusci.2023.111068

	Influence of smooth heater size on critical heat flux and heat transfer coefficient of saturated pool boiling heat transfer
	Wang, Xueli 4; Tang, Ye 4; Liu, Lang 3,4; Zhang, Pengju 4; Zhang, Yonghai 2; Zhao, Jianfu 1; Ji, Changfa 4
刊名	EXPERIMENTAL THERMAL AND FLUID SCIENCE
	2024-02-01
卷号	151 页码:12
关键词	Pool boiling Heater size Critical heat flux Boiling heat transfer coefficient Bubble dynamics
ISSN号	0894-1777
DOI	10.1016/j.expthermflusci.2023.111068
通讯作者	Wang, Xueli(wxl@xust.edu.cn) ; Liu, Lang(liulang@xust.edu.cn)
英文摘要	In order to study the influence of smooth heater size on the performance of pool boiling heat transfer, saturated boiling experiments of FC-72 were conducted on eight sized smooth silicon chips (the test surfaces are denoted as S5 similar to S30, and their dimensionless dimensions are in the range of L-h/L-c = 7 similar to 42). The bubble dynamics during boiling were observed with a high-speed camera. The results indicated that in natural convection regime, the heat transfer coefficient decreases with increasing heater size at a given heat flux. Besides, the larger surfaces enter into the nucleate boiling regime earlier. In a fully developed nucleate boiling regime, S5 surface displays the optimal heat transfer performance. The reality is that no vapor columns are produced even in the high heat flux range due to its small bubble departure diameter and high bubble departure frequency. For S8 similar to S15 surfaces, the wall temperatures increase continuously with the increase of heat flux, while S20 similar to S30 surfaces present a trend of first keeping constant and then increasing. The active nucleation site densities on S15 similar to S30 surfaces follow the law of N-a = 0.45q(2) in the whole nucleate boiling regime. By contrast, for S5 similar to S12 surfaces, the nucleation site densities abide by this law only in a fully developed nucleate boiling regime. In addition, the departure diameter and departure frequency of bubbles increase with the increase of heat flux for all surfaces. It is observed that with the increase of smooth heater size, CHF presents a changing trend of first increasing (in range of L-h <= lambda(D), lambda(D) is the most dangerous Taylor wavelength), then decreasing (in range of lambda(D) < L-h <= 3 lambda(D)) and finally leveling off (in range of L-h > 3 lambda(D)). Accordingly, the CHF value maximizes at the heater size L-h = lambda(D). In the segment of decreased CHF, the decline rate of CHF in range of lambda(D) < L-h <= 2 lambda(D) is larger than that in range of 2 lambda(D) < L-h <= 3 lambda(D). Meanwhile, the influencing mechanisms of heater size on CHF were explained by consideration into bubble patterns and behavior.
资助项目	National Natural Science Foundation of China[52004207] ; National Natural Science Foundation of China[52304154] ; National Natural Science Foundation of China[51874229] ; National Natural Science Foundation of China[51976163] ; National Natural Science Foundation of China[52074212] ; Scientific Research Program for Youth Innovation Team Construction - Shaanxi Provincial Education Department of China[21JP077] ; Natural Science Basic Research Program - Shaanxi Provincial Science and Technology Department of China[2021JQ-569] ; Shaanxi Provincial Education Department of China[20JK0767]
WOS关键词	SURFACES ; ORIENTATION ; ARRAY ; CHF
WOS研究方向	Thermodynamics ; Engineering ; Physics
语种	英语
WOS记录号	WOS:001101258800001
资助机构	National Natural Science Foundation of China ; Scientific Research Program for Youth Innovation Team Construction - Shaanxi Provincial Education Department of China ; Natural Science Basic Research Program - Shaanxi Provincial Science and Technology Department of China ; Shaanxi Provincial Education Department of China
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/93523]
专题	力学研究所_国家微重力实验室
通讯作者	Wang, Xueli; Liu, Lang
作者单位	1.Chinese Acad Sci, Inst Mech, Key Lab Micrograv, Natl Micrograv Lab, Beijing 100190, Peoples R China 2.Xi An Jiao Tong Univ, Sch Chem Engn & Technol, Xian 710049, Peoples R China 3.Minist Educ China, Key Lab Western Mines & Hazards Prevent, Xian 710054, Peoples R China 4.Xian Univ Sci & Technol, Sch Energy Engn, Xian 710054, Peoples R China
推荐引用方式 GB/T 7714	Wang, Xueli,Tang, Ye,Liu, Lang,et al. Influence of smooth heater size on critical heat flux and heat transfer coefficient of saturated pool boiling heat transfer[J]. EXPERIMENTAL THERMAL AND FLUID SCIENCE,2024,151:12.
APA	Wang, Xueli.,Tang, Ye.,Liu, Lang.,Zhang, Pengju.,Zhang, Yonghai.,...&Ji, Changfa.(2024).Influence of smooth heater size on critical heat flux and heat transfer coefficient of saturated pool boiling heat transfer.EXPERIMENTAL THERMAL AND FLUID SCIENCE,151,12.
MLA	Wang, Xueli,et al."Influence of smooth heater size on critical heat flux and heat transfer coefficient of saturated pool boiling heat transfer".EXPERIMENTAL THERMAL AND FLUID SCIENCE 151(2024):12.