Measurement of thermal conductivity of graphene-water nanofluid at below and above ambient temperatures

被引:91
作者
Ahammed, Nizar [1 ]
Asirvatham, Lazarus Godson [1 ]
Titus, Joel [1 ]
Bose, Jefferson Raja [1 ]
Wongwises, Somchai [2 ]
机构
[1] Karunya Univ, Dept Mech Engn, Coimbatore 641114, Tamil Nadu, India
[2] King Mongkuts Univ Technol Thonburi, Fluid Mech Thermal Engn & Multiphase Flow Res Lab, Dept Mech Engn, Fac Engn, Bangkok, Thailand
关键词
Thermal conductivity; Graphene; Nanofluid; Temperature; Volume concentration; CARBON-FIBERS; ENHANCEMENT; NANOPARTICLES; VISCOSITY; SOLIDS; GLYCOL; AL2O3;
D O I
10.1016/j.icheatmasstransfer.2015.11.002
中图分类号
O414.1 [热力学];
学科分类号
摘要
The present paper deals with the design, development and the measurement of thermal conductivity of graphene water nanofluid using a transient hot wire technique at temperatures below and above ambient conditions ranging from 10 degrees C to 50 degrees C. The equipment is designed to measure the thermal conductivity using a single platinum wire of diameter 50 mu m and 100 mm length. The platinum micro-wire acts both as a temperature sensor and heating element. Low volume concentrations (0.05, 0.1 and 0.15%) of graphene, having the size less than 100 nm, dispersed in 100 ml of water with SOBS (sodium dodecyl benzene sulfonate) as surfactant, for prolonged stability, is used in the present study. The results showed an enhancement in the thermal conductivity of 37.2% for 0.15% volume concentration of graphene at 50 degrees C when compared with that of the water at the same temperature. An interesting observation from this study is that the average thermal conductivity enhancement percentage with the increase in volume concentration (say from 0.05% to 0.15%) is found to be 3.3% higher when compared with that of the average enhancement with the increase in temperature from 10 degrees C to 50 degrees C. (C) 2015 Elsevier Ltd. All rights reserved.
引用
收藏
页码:66 / 74
页数:9
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