Experimental investigation and mechanism of critical heat flux enhancement in pool boiling heat transfer with nanofluids

被引：0
作者：
R. Kamatchi
S. Venkatachalapathy
C. Nithya
机构：
[1] National Institute of Technology,Department of Mechanical Engineering
[2] National Institute of Technology,Centre for Energy and Environmental Science and Technology
[3] National Institute of Technology,Department of Mechanical Engineering
来源：
Heat and Mass Transfer | 2016年 / 52卷
关键词：
Contact Angle; Reduce Graphene Oxide; Graphite Oxide; Critical Heat Flux; Boiling Heat Transfer;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
In the present study, reduced graphene oxide (rGO) is synthesized from graphite using modified Hummer and chemical reduction methods. Various characterizations techniques are carried out to study the in-plane crystallite size, number of layers, presence of functional groups and surface morphology. Different concentrations of 0.01, 0.1, and 0.3 g/l of rGO/water nanofluids are prepared by dispersing the flakes in DI water. The colloidal stability of 0.3 g/l concentration is measured after 5 days using Zetasizer and found to be stable. The rGO/water nanofluids are then used to study the effect on the enhancement of critical heat flux (CHF) in pool boiling heat transfer. Results indicate an enhancement in CHF ranging from 145 to 245 % for the tested concentrations. The mechanisms of CHF enhancement are analyzed based on surface wettability, surface roughness, and porous layer thickness. The macrolayer dryout model sufficiently supports the mechanism of CHF enhancement of thin wire with rGO deposits, which is not reported yet.
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页码：2357 / 2366
页数：9
相关论文
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[1]  
Nukiyama S(1934)The maximum and minimum values of the heat transmitted from metal to boiling water under atmospheric pressure J Jpn Soc Mech Eng 37 367-374
[2]  
Kamatchi R(2015)Parametric study of pool boiling heat transfer with nanofluids for the enhancement of critical heat flux: a review Int J Therm Sci 87 228-240
[3]  
Venkatachalapathy S(2009)Experimental study of the characteristics and mechanism of pool boiling CHF enhancement using nanofluids Heat Mass Transf 45 991-998
[4]  
Kim H(2015)Review of the influence of nanoparticles on thermal conductivity, nucleate pool boiling and critical heat flux Heat Mass Transf 51 381-398
[5]  
Kim M(2010)Pool boiling characteristics of low concentration nanofluids Int J Heat Mass Transf 53 972-981
[6]  
Kshirsagar JM(2010)Effects of nanofluids containing graphene/graphene-oxide nanosheets on critical heat flux Appl Phys Lett 97 023103-3-771
[7]  
Shrivastava R(2013)Experimental study of the effect of a reduced graphene oxide coating on critical heat flux enhancement Int J Heat Mass Transf 60 763-502
[8]  
Kwark SM(2015)Pool boiling CHF of reduced graphene oxide, graphene, and SiC-coated surfaces under highly wettable FC-72 Int J Heat Mass Transf 82 490-1079
[9]  
Kumar Ratan(2015)Comparative studies of pool boiling heat transfer with nano-fluids on porous surface Heat Mass Transf 123 1071-399
[10]  
Moreno Gilberto(2001)A theoretical model to predict pool boiling CHF incorporating effects of contact angle and orientation ASME J Heat Transf 26 389-4116
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