化工学报Issue(11)：4394-4400,7.DOI:10.11949/j.issn.0438-1157.20150761
纳米石墨冷冻机油对R600a流动沸腾换热的影响
Effect of graphite nanolubricant on R600a flow boiling heat transfer
摘要
Abstract
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 fluidversus 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%.关键词
纳米粒子/传热/测量/传热系数/预测/关联式Key words
nanoparticles/heat transfer/measurement/heat transfer coefficient/prediction/correlation分类
通用工业技术引用本文复制引用
陈梦寻,张华,娄江峰..纳米石墨冷冻机油对R600a流动沸腾换热的影响[J].化工学报,2015,(11):4394-4400,7.基金项目
国家自然科学基金项目(51176124)；上海市重点学科建设项目($30503)。@@@@supported by the National Natural Science Foundation of China (51176124) and the Shanghai Leading Academic Discipline Project($30503) （51176124）
