The effects of micro-structured surfaces on multi-nozzle spray cooling

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	The effects of micro-structured surfaces on multi-nozzle spray cooling
	Hou, Yan 1,2; Tao, Yujia 1; Huai, Xiulan 1
刊名	APPLIED THERMAL ENGINEERING
	2014-01-25
卷号	62 期号:2 页码:613-621
关键词	Micro-structured surface Multi-nozzle spray cooling Heat transfer Temperature uniformity
英文摘要	Experiments were conducted to investigate heat transfer characteristics of spray cooling with eight nozzles for micro-structured surfaces included cubic pin fins and straight pin fins of different sizes. Liquid volume flow rate ranged from 2.46 x 10(-2) m(3)/s/m(2) to 3.91 x 10(-2) m(3)/s/m2 and the corresponded inlet pressures changed from 0.28 MPa to 0.6 MPa by keeping the inlet water temperature between 20.4 degrees C and 24.31 degrees C. And the input power of heat block varied from 180 W to 1080 W. The results show that the heat transfer performances of straight fins2 and straight fins3 are the best in single phase zone, but the cubic pin fins is better in two phase zone. Notably, the critical point between single phase zone and two phase zone shifts to left with the increasing of liquid volume flow rate. Moreover, with the liquid volume flow rate increasing, the heat transfer coefficient increases as well, but straight fins1 and polished surface are not sensitive to this change. For a deeper analysis of the heat transfer enhancement, a dimensionless number (DM) is created to characterize heat transfer performance of different microstructures in single phase heat transfer. We verified the dimensionless number using experimental results in this study and previous literature. Furthermore, the micro-structured surfaces have negligible effects on temperature distribution except for cubic pin fins. (C) 2013 Elsevier Ltd. All rights reserved.
WOS标题词	Science & Technology ; Physical Sciences ; Technology
类目[WOS]	Thermodynamics ; Energy & Fuels ; Engineering, Mechanical ; Mechanics
研究领域[WOS]	Thermodynamics ; Energy & Fuels ; Engineering ; Mechanics
关键词[WOS]	HEAT-TRANSFER CHARACTERISTICS ; ENHANCED SURFACES ; SINGLE-NOZZLE ; CLOSED-LOOP ; FLUX ; ATOMIZATION ; ARRAYS ; FC-72 ; PLAIN
收录类别	SCI
语种	英语
WOS记录号	WOS:000330910700036
公开日期	2015-12-22
内容类型	期刊论文
源URL	[http://ir.etp.ac.cn/handle/311046/106052]
专题	工程热物理研究所_中国科学院工程热物理所（论文库）_期刊论文（SCI）
作者单位	1.Univ Chinese Acad Sci, Inst Engn Thermophys, Beijing 100190, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Hou, Yan,Tao, Yujia,Huai, Xiulan. The effects of micro-structured surfaces on multi-nozzle spray cooling[J]. APPLIED THERMAL ENGINEERING,2014,62(2):613-621.
APA	Hou, Yan,Tao, Yujia,&Huai, Xiulan.(2014).The effects of micro-structured surfaces on multi-nozzle spray cooling.APPLIED THERMAL ENGINEERING,62(2),613-621.
MLA	Hou, Yan,et al."The effects of micro-structured surfaces on multi-nozzle spray cooling".APPLIED THERMAL ENGINEERING 62.2(2014):613-621.