化工进展2018，Vol.37Issue(6)：2067-2076,10.DOI:10.16085/j.issn.1000-6613.2017-1667
超亲水/超疏水匹配超薄热管的传热特性
Heat transfer characteristics of super-hydrophilic and super-hydrophobic matched ultra-thin heat pipe
摘要
Abstract
Ultra-thin heat pipe(UTHP)is an ideal tool to solve the problem of heat dissipation in the small space of electronic devices,and the construction of nanostructure is an important method to improve the heat transfer performance of UTHP. In this paper,we developed a new type of UTHP with 1.30mm thickness and used chemical method to modify the porous wicks and the condensation surface to match the super-hydrophilic and super-hydrophobic. The effects of nanostructures and inclination angles at different filling ratios on thermal performance were analyzed by experiments. Results showed that the nanostructures change the wettability of the porous wicks and the condensation surface. The super-hydrophilic porous wicks have stronger water absorbing ability,and the droplet condensation mechanism of the super-hydrophobic condensation surface promotes the condensate reflux efficiency. In the small filling ratio,the nanostructure in the porous wicks facilitates the boiling heat transfer and condensation liquid reflux velocity,and then increases the resistance of vapor escaping and the liquid flow in the large filling ratio,which has a negative effect on the thermal performance. The sample with super-hydrophilic porous wicks and super-hydrophobic condensation surface has a large condensation heat resistance,but it has best critical heat fluxes(CHF)at any filling ratios. The inclination angle has a great influence on the thermal performance,and the UTHP has optimal heat performance when theevaporation section is directly below the condensation section.关键词
超薄热管/纳米结构/超亲水/超疏水/多孔介质/传热/充液比/倾角Key words
ultra-thin heat pipe/nanostructure/super-hydrophilic/super-hydrophobic/porous media/heat transfer/filling ratio/inclination angle分类
能源科技引用本文复制引用
刘昌泉,徐进良,纪献兵..超亲水/超疏水匹配超薄热管的传热特性[J].化工进展,2018,37(6):2067-2076,10.基金项目
国家自然科学基金重点项目(51436004)及国家自然科学基金项目(51676071) （51436004）
