Effect of graphite nanolubricant on R600a flow boiling heat transfer

被引：0

作者：

Chen, Mengxun ^{[1
]}

Zhang, Hua ^{[1
]}

Lou, Jiangfeng ^{[2
]}

机构：

[1] School of Energy and Power Engineering, University of Shanghai for Science and Technology, Shanghai

[2] Zhejiang DUN'AN Artificial Environmental Equipment Co., Ltd., Zhuji, 311835, Zhejiang

来源：

Huagong Xuebao/CIESC Journal | 2015年 / 66卷 / 11期

基金：

中国国家自然科学基金;

关键词：

Correlation; Heat transfer; Heat transfer coefficient; Measurement; Nanoparticles; Prediction;

D O I：

10.11949/j.issn.0438-1157.20150761

中图分类号：

TK1 [热力工程、热机];

学科分类号：

080702 ;

摘要：

A test rig with a horizontal smooth tube was built to measure flow boiling heat transfer of nanolubricant/refrigerant. The experimental study on heat transfer characteristics of graphite-nanorefrigerant flow boiling inside a horizontal smooth copper tube, with total length of 2.5 m, outside diameter of 9.52 mm, inside diameter of 8 mm and wall thickness of 0.76 mm was performed. Influence of graphite on flow boiling heat transfer characteristics of nanorefrigerant/oil mixture was investigated. There were three kinds of fluid under experiment:R600a, R600a/oil and graphite nanorefrigerant/oil with different graphite mass fractions (0.05%, 0.1% and 0.2%). Flow boiling heat transfer coefficients of these fluid versus vapor quality were measured respectively in a horizontal smooth tube under the mass flow density of 150, 200, 250, 300 kg·m-2·s-1. The results indicated that the presence of graphite enhanced the flow boiling heat transfer. A correlation for predicting the flow boiling heat transfer coefficient of nanorefrigerant/oil mixture with graphite was proposed and it agreed with 94.5% of the experimental data within a deviation of ±15%. © All Right Reserved.

引用

页码：4394 / 4400

页数：6

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