Laminar convective heat transfer of hexylamine-treated MWCNTs-based turbine oil nanofluid

被引：67

作者：

Amiri, Ahmad ^{[1
]}

Shanbedi, Mehdi ^{[2
]}

Yarmand, Hooman ^{[1
]}

Arzani, Hamed Khajeh ^{[1
]}

Gharehkhani, Samira ^{[1
]}

Montazer, Elham ^{[1
]}

Sadri, Rad ^{[1
]}

Sarsam, Wail ^{[1
,3
]}

Chew, B. T. ^{[1
]}

Kazi, S. N. ^{[1
]}

机构：

[1] Univ Malaya, Dept Mech Engn, Kuala Lumpur, Malaysia

[2] Ferdowsi Univ Mashhad, Dept Chem Engn, Fac Engn, Mashhad, Iran

[3] Univ Baghdad, Dept Mech Engn, Coll Engn, Baghdad 10071, Iraq

来源：

ENERGY CONVERSION AND MANAGEMENT | 2015年 / 105卷

关键词：

Carbon nanotubes; Microwave; Functionalization; Hexylamine; Heat transfer and turbine oil; WALLED CARBON NANOTUBES; THERMAL-CONDUCTIVITY; PRESSURE-DROP; ONE-POT; GRAPHENE NANOPLATELETS; MECHANICAL-BEHAVIOR; FUNCTIONALIZATION; PERFORMANCE; ENHANCEMENT; FLOW;

D O I：

10.1016/j.enconman.2015.07.066

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

Multi-walled carbon nanotubes (MWCNTs) were functionalized by hexylamine (HA) in a promising, cost-effective, rapid and microwave-assisted approach. In order to decrease defects and remove acid-treatment stage, functionalization of MWCNTs with HA was carried out in the presence of diazonium reaction. Surface functionality groups and morphology of chemically-functionalized MWCNTS were characterized by FTIR, Raman spectroscopy, thermogravimetric analysis (DTG), and transmission electron microscopy (TEM). To reach a promising dispersibility in oil media, MWCNTs were functionalized with HA. While the cylindrical structures of MWCNTs were remained reasonably intact, characterization results consistently confirmed the sidewall-functionalization of MWCNTs with HA functionalities. Then, HA-treated MWCNTs-based turbine oil nanofluids (HA-MWCNTs/TO) with different volume fractions were synthesized and employed to be investigated in terms of heat transfer potential. Convective heat transfer coefficient of HA-MWCNTs/TO as a positive parameter and pressure drop as a negative factor were investigated for various volume fractions. While results suggested a weak increase in the pressure drop by MWCNTs loading into the TO, lack of acidic agents, the performance index higher than 1 and a significant increase in the convective heat transfer open a new gateway for introducing this economical product for industrial applications in turbines and can be a capable alternative for conventional TO. (C) 2015 Elsevier Ltd. All rights reserved.

引用

页码：355 / 367

页数：13

共 69 条

[1] Experimental characterization of convective heat transfer with MWCNT based nanofluids under laminar flow conditions [J].