摘要
本文实验研究了疏水改性对泡沫金属表面池沸腾换热特性的影响。测试样件为泡沫铜,孔密度为5 PPI和10 PPI,疏水表面样件通过对泡沫铜进行硫醇分子自组装结合的方法制备。实验结果表明,对于孔密度为5PPI的泡沫金属,疏水表面改性使沸腾起始点过热度由4.26℃降低至2.95℃,换热系数增大了5%～20%,换热性能明显增强。对于孔密度为10 PPI的泡沫金属,随着热流密度增大,疏水改性增强换热。
The effect of hydrophobic modification on pool boiling heat transfer characteristics of water on metal foam covered surface was studied experimentally. The test sample is copper foam with pore densities of 5 PPI and 10 PPI, and the hydrophobic surface sample was prepared by a method of self-assembly bonding of thiol molecules to copper foam. The experimental results show that, for foam metal with the pore density of 5 PPI, the hydrophobic surface modification reduces the superheat of onset of nucleate boiling from 4.26 ℃ to 2.95 ℃, and the heat transfer coefficient increased by 5%~20%. The heat transfer performance is obviously enhanced. For the metal foam with the pore density of 10 PPI, as the heat flux increases, the hydrophobic modification enhances heat transfer.
作者
胡晨昱
赖展程
胡海涛
丁国良
韩维哲
HU Chenyu;LAI Zhancheng;HU Haitao;DING Guoliang;HAN Weizhe(Institute of Refrigeration and Cryogenics Engineering,Shanghai Jiao Tong University,Shanghai 200240,China)
出处
《制冷技术》
2018年第6期8-11,共4页
Chinese Journal of Refrigeration Technology
基金
国家自然科学基金(No.51576122)
关键词
泡沫金属
疏水
池沸腾
换热
Metal foam
Hydrophobic
Pool boiling
Heat transfer
