GOALI: 3D-printed biomimetic structures for enhanced boiling heat transfer and thermal management

GOALI：3D 打印仿生结构可增强沸腾传热和热管理

• 批准号: 2149489
• 负责人: Calvin Hong Li
• 金额: $ 40万
• 依托单位: Villanova University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2022
• 资助国家: 美国
• 起止时间: 2022-09-01 至 2025-08-31
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2149489&HistoricalAwards=false
• 关键词: GOALI; 3D; printed; biomimetic; structures

Boiling heat transfer is one the most efficient ways of removing heat from a hot surface by changing the coolant from liquid to vapor. Boiling has been widely employed in thermal management of power generation, refrigeration and air conditioning systems, electronic devices, and other high-power density systems. This GOALI project will study fundamental aspects of liquid supplies and boiling heat transfer as affected by surface structure characteristics that include a novel biomimetic structure. This will be integrated into commercial heat exchangers that can potentially achieve significant increase in heat transfer performance. The biomimetic structures will be designed by a leaf-vein growth algorithm and manufactured by 3D metal printing. In addition to liquid supplies and boiling heat transfer tests, the biomimetic structures will be tested in commercial products for durability and fouling. The results of the study will assist both in developing basic understanding of boiling heat transfer by biomimetic structures and in developing next-generation commercial products for electronic devices and data center cooling. Research results and activities will be integrated into educational and outreach programs for underrepresented groups and the public, including hands-on 3D biomimetic structure design and manufacture, and heat transfer tests.Enhancements of the critical heat flux and heat transfer coefficient in boiling heat transfer are dictated by the maximum liquid supply and the bubble generation rate. The limits for enhancements will be examined and optimized through numerical simulations and experiments. A biomimetic structure will address the limits of hydrodynamic instability and viscous choking of liquid supply perpendicular to the heating surface, and of liquid wetting/wicking parallel to the heating surface. Critical structural characters and surface properties will be fabricated by 3D metal printing and tuned by atomic layer deposition. The structural characters and surface properties will be directly correlated to liquid supply and bubble nucleation and quantified by models.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

沸腾换热是通过将冷却剂从液体转变为蒸汽来从高温表面带走热量的最有效的方法之一。沸腾在发电、制冷空调系统、电子器件等高功率密度系统的热管理中有着广泛的应用。这个GALI项目将研究液体供应和沸腾换热的基本方面，因为表面结构特征包括一种新的仿生结构。这将被集成到商业热交换器中，潜在地实现显著的换热性能。仿生结构将通过叶脉生长算法设计，并通过3D金属打印制造。除了液体供应和沸腾换热测试外，这些仿生结构还将在商业产品中进行耐用性和污垢测试。这项研究的结果将有助于加深对仿生结构沸腾换热的基本理解，并有助于开发用于电子设备和数据中心冷却的下一代商业产品。研究成果和活动将被整合到针对代表性不足的群体和公众的教育和推广计划中，包括动手3D仿生结构设计和制造，以及传热测试。沸腾传热中临界热流密度和传热系数的提高取决于最大液体供应量和气泡生成率。增强的极限将通过数值模拟和实验来检验和优化。仿生结构将解决流体动力不稳定性和垂直于受热面的液体供应的粘性堵塞，以及平行于受热面的液体润湿/排出的限制。关键的结构特征和表面性质将通过3D金属打印和原子层沉积进行调整。结构特征和表面属性将与液体供应和气泡成核直接相关，并通过模型进行量化。该奖项反映了NSF的法定使命，并通过使用基金会的智力优势和更广泛的影响审查标准进行评估，被认为值得支持。