Optimization of loop heat pipe heat transfer performance using self-adaptive porous structures

自适应多孔结构环路热管传热性能优化

• 批准号: 20K14666
• 负责人: ファン ビンヌエン
• 金额: $ 2.75万
• 依托单位: Nagoya University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Early-Career Scientists
• 财政年份: 2020
• 资助国家: 日本
• 起止时间: 2020-04-01 至 2021-03-31
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-20K14666/
• 关键词: Loop heat pipe; Polytetrafluoroethylene; Melamine foam; Self-adaptive structure; Capillary structure; Self-adaptive; Performance optimization

We designed, evaluated performance of the dual-evaporator loop heat pipe (LHP). PTFE membranes were used as wick. Operating characteristics of the LHP in various orientations was clarified. Effect of vapor/liquid distribution in reservoirs on the performance was discussed. One article was published on a high impact journal.However, the pore size variation range of PTFE wick was limited due to its structure. Melamine foam, a novel material with open foam structure and superhydrophilicity which has not been used so far, was proposed. Pore size of melamine foam was controlled from 215 micron to 18 micron with very small changes in porosity and permeability. The melamine prototype exhibited better performance than the PTFE LHP.

设计了双蒸发器回路热管，并对其性能进行了评价。PTFE膜用作芯。阐明了LHP在不同方向上的工作特性。讨论了气液分布对气液分离器性能的影响。一篇论文发表在高影响力的期刊上，但PTFE吸液芯的孔径变化范围有限，这是由于其结构所造成的。三聚氰胺泡沫是一种新型的具有超亲水性的开放泡沫结构材料，目前尚未得到广泛的应用。三聚氰胺泡沫的孔径控制在215微米至18微米之间，孔隙率和渗透率变化非常小。三聚氰胺原型表现出比PTFE LHP更好的性能。

项目成果

Operating characteristics of a dual flat-evaporator loop heat pipe for single heat source cooling in any orientation

• DOI: 10.1016/j.ijheatmasstransfer.2021.121146
• 发表时间: 2021-06
• 期刊: International Journal of Heat and Mass Transfer
• 影响因子: 5.2
• 作者: Nguyen Phan;Yuki Saito;N. Katayama;H. Nagano