| 热交换器表面镀层对传热性能的影响 |
| |
| 引用本文： | 程延海,朱真才,张世举,邢方方,程林. 热交换器表面镀层对传热性能的影响[J]. 工程热物理学报, 2012, 0(1): 128-130 |
| |
| 作者姓名： | 程延海 朱真才 张世举 邢方方 程林 |
| |
| 作者单位： | 中国矿业大学机电工程学院;山东大学热科学与工程研究中心 |
| |
| 基金项目： | 国家自然科学基金项目(No.51006117);中国博士后科学基金项目(No.20090461152) |
| |
| 摘 要： | 采用化学镀的方法对热交换器表面进行表面改性,使其换热表面沉积一层表面能不同的均匀镀层。传热实验表明,随着磷含量的增大,凝结传热系数增大。进一步可视化实验研究表明,镀层换热表面均表现为珠膜共存状态,增大镀层的磷含量,换热表面促进珠状凝结的效果更加明显。这归于镀层降低了传热表面的表面能值。
|
| 关 键 词： | 镀层 表面能 凝结传热 传热机理 |
Effect of Deposit of Heat Exchangers on Heat Transfer Properties |
| |
| CHENG Yan-Hai,ZHU Zhen-Cai,ZHANG Shi-Ju,XING Fang-Fang,CHENG Lin. Effect of Deposit of Heat Exchangers on Heat Transfer Properties[J]. Journal of Engineering Thermophysics, 2012, 0(1): 128-130 |
| |
| Authors: | CHENG Yan-Hai ZHU Zhen-Cai ZHANG Shi-Ju XING Fang-Fang CHENG Lin |
| |
| Affiliation: | 1.School of Mechanical and Electrical Engineering,China University of Mining and Technology,Xuzhou 221116,China; 2.Institute of Thermal Science and Technology,Shandong University,Jinan 250061,China) |
| |
| Abstract: | In this study,the uniform electroless Ni-P deposits with different surface free energy were fabricated on the heat transfer surface of heat exchanger by adjusting process parameters of electroless plating.The experimental results of heat transfer showed that the condensation heat transfer coefficient was increased with the increase of phosphorus content in the deposits.By using further visual experiments,it was found that the dropwise and the film are coexisted on deposit heat transfer surface.Furthermore,the deposit surface with higher phosphorus contents showed more evident effect in enhancing dropwise condensation,which was ascribed to surface free energy was reduced. |
| |
| Keywords: | deposit surface free energy condensation heat transfer heat transfer mechanism |
| 本文献已被 CNKI 等数据库收录！ |
|
