Flow-boiling heat transfer of R-134a-based nanofluids in a horizontal tube

被引：163
作者：
Henderson, Kristen [1 ]
Park, Young-Gil [1 ]
Liu, Liping [1 ]
Jacobi, Anthony M. [1 ]
机构：
[1] Univ Illinois, Dept Mech Sci & Engn, Urbana, IL 61801 USA
来源：
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER | 2010年 / 53卷 / 5-6期
关键词：
Halocarbon; Dispersion; Flow-boiling; Nanotechnology; Nanofluid; THERMAL-CONDUCTIVITY; NANO-FLUIDS; TRANSFER ENHANCEMENT; AQUEOUS SUSPENSIONS; POOL; NANOPARTICLES; MIXTURE; SURFACE; WATER; MODEL;
D O I：
10.1016/j.ijheatmasstransfer.2009.11.026
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
The influence of nanoparticles on the flow-boiling of R-134a and R-134a/polyolester mixtures is quantified for flows of low vapor quality (x < 20%) over a range of mass fluxes (100 < G < 400 kg/m(2) s). With direct dispersion Of SiO2 nanoparticles in R-134a, the heat transfer coefficient decreases (as much as 55%) in comparison to pure R-134a. This degradation is, in part, due to difficulties in obtaining a stable dispersion. However, excellent dispersion is achieved for a mixture of R-134a and polyolester oil with CuO nanoparticles, and the heat transfer coefficient increases more than 100% over baseline R-134a/polyolester results. In the range of these experiments, nanoparticles have an insignificant effect on the flow pressure drop with the R-134a/POE/CuO nanofluid. (C) 2009 Elsevier Ltd. All rights reserved
引用
收藏
页码：944 / 951
页数：8
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