期刊
POWDER TECHNOLOGY
卷 339, 期 -, 页码 119-129出版社
ELSEVIER
DOI: 10.1016/j.powtec.2018.08.003
关键词
Nanolubricant; Polyalkylene glycol; Thermal conductivity; Non-Newtonian
An experimental investigation has been carried out to study the thermal and rheological characteristics of polyalkylene glycol (PAG) oil suspended with Al2O3 nanoparticles. The volume fraction is varied from 0.07 to 0.6% and temperature from 20 degrees C to 90 degrees C. The nanolubricant exhibits higher thermal conductivity and viscosity compared to the pure PAG oil. Conversely, both these properties decrease with increase in temperature. The highest thermal conductivity ratio is 1.48 at 0.6% concentration and temperature 20 degrees C. The maximum viscosity ratio is 18.42 at 0.6% concentration and shear rate 3.75/s. The Ostwald-DeWaele rheological model is fitted to predict the behaviour of nanolubricant with respect to temperature and shear rate. Interestingly, the pure lubricant, which is a Newtonian fluid, is transformed into non-Newtonian fluid with the addition of nanoparticles. PAG oil up to 0.4 vol% alumina can be considered as an energy efficient alternative for refrigerant compressor oils. (C) 2018 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据