Scalable-Manufactured Micro/Nanostructured Surfaces for Heat Transfer Applications
可规模化制造的维纳结构传热强化表面
Ronggui Yang（杨荣贵 ）
ABSRACT
Thermal transport plays an important role in energy conversion efficiency and device reliability. There were significant progresses over the past two decades on utilizing micro/nano-structures for enhancing or reducing heat transfer, owing much to the challenging needs in high efficiency energy conversion systems and thermal management of electronics. Yet, cost-effectiveness plays a key role in engineering micro/nanostructures for heat transfer applications. In this talk, I will highlight two examples that we currently work on, by utilizing scalable-manufactured micro/nanostructured surfaces for enhancing heat transfer processes: phase-change heat transfer and radiative cooling. For phase-change heat transfer, we propose a novel strategy by coupling droplets/bubbles with a liquid film to minimize the thermal resistance from the vapor to the solid surface. Unprecedented heat transfer enhancement was demonstrated on the scalable surfaces for both condensation and liquid-film boiling. By embedding resonant polar dielectric microspheres randomly in a polymeric matrix, we demonstrated a daytime radiative cooling metamaterial that can be scalable-manufactured, with great potential for large-scale deployment.
热管理在提高能量转换效率和增强器件／系统的可靠性方面有着非常重要的作用。在过去的二十多年里，利用微纳结构强化传热来调控热管理取得了重大的进展。然而，微纳结构的高成本影响了大规模工程应用。我将介绍我们研究的低成本、可规模化制造的强化传热的微纳结构表面。在相变换热领域，我们提出了液滴-汽泡耦合液膜的策略，可以最大限度的降低传热热阻。利用该机理，在可规模化制造的维纳功能表面上实现了较好的冷凝和薄液膜沸腾传热强化效果。在辐射制冷领域，通过在聚合物基底中随机的嵌入极性介质微球，我们开发出了一种在白天也能取得极佳冷却效果的辐射制冷超材料，具有大规模应用的巨大潜质。
BIOGRAPHY
Dr. Ronggui Yang is a Full Professor of Energy and Power Engineering at Huazhong University of Science and Technology in Wuhan, China. He was a faculty member at the University of Colorado Boulder in 2006-2019. Dr. Yang received his BS degree in Thermal Engineering from Xi’an Jiaotong University in 1996 and a MS degree in Engineering Thermophysics from Tsinghua University in 199 and a MS degree in MEMS from UCLA in 2001 and his Ph.D from MIT in 2006. His research focuses at the intersection of the fundamentals of thermal transport and micro/nano-structured materials, for solving grand thermal challenges. Dr. Ronggui Yang has published ~180 journal papers, delivered > 100 invited seminars and is associated with >140 invited and contributed conference talks and posters that garnered numerous best paper/presentation/poster awards. His journal papers are highly cited, with an H-index of 50, a total citation ~ 1,1000 times as of Otober 1, 2020, and an annual citation > 1000 times, per ISI Web of Science since 2017 (an H-Index of 64, a total citation > 16,500 times as of October 1, 2020, and an annual citation > 2000 times since 2018, per Google Scholar). His innovative research has won him numerous awards including the most recent 2020 Nukiyama Memorial Award in Thermal Science and Engineering, the 2014 ITS Young Investigator in Thermoelectrics from International Thermoelectric Society (ITS), the 2010 ASME Bergles-Rohsenow Young Investigator Award in Heat Transfer, an NSF CAREER Award in 2009, the MIT Technology Review’s TR35 Award and the DARPA Young Faculty Award in 2008, the 2005 Goldsmid Award for Research Excellence in Thermoelectrics from ITS, and a NASA Tech Brief Award for a Technical Innovation in 2004.
杨荣贵博士, 华中科技大学能源学院二级教授 。杨荣贵博士于1996年西安交通大学热能工程本科毕业，1999年清华大学热能工程系工程热物理专业硕士，2001年加州大学洛杉矶校区微机电系统工程硕士，2006年麻省理工学院机械工程系博士。自2006年1月起至2019年，杨荣贵博士历任美国科罗拉多大学博尔德分校机械工程系助理教授、副教授（终身）、终身正教授 （2018年起停薪留职）。 杨荣贵博士因其在能源领域的创新研究，于2008年入选《科技评论》评选的35位“世界顶尖青年发明家” (TR35 － 35 under 35)，曾获得美国科学基金委杰出青年奖（NSF CAREER Award，2009），美国国防部高级研究计划署青年学者奖（DARPA Young Investigator Award，2008），美国机械工程师学会Bergles-Rohsenow青年学者奖（ASME Bergles-Rohsenow Young Investigator in Heat Transfer，2010），国际热电学会青年学者奖和戈德史密斯奖（Young Investigator Award 2014 和Goldsmid Award 2005），2015年美国机械工程师学会会士（ASME Fellow）。杨荣贵博士于2017年发明的可规模化生产的无能耗辐射制冷薄膜荣膺《物理世界》评选的2017年“全球十大物理突破”，于2020年度获得国际传热界每两年遴选一位的在热能科学与工程领域做出重大成就的Nukiyama Memorial Award 国际热科学纪念奖等。杨荣贵博士还是瑞凌新能源科技有限公司创始人、董事长兼首席科学家，开文热工科技有限公司创始人、董事。
杨荣贵博士已发表了包括3篇Science、7篇Nature子刊、，3篇 Science Advances，3篇 Joule，1篇Review of Modern Physics在内的180多篇期刊论文，发表领域涵盖：应用物理、能源材料、传热及微纳米技术。 ISI Web of Science引用> 11000次，H指数为50 （Google学术总引用次数 > 16,500次， H指数为64， 2018年以来年度引用次数 > 2000次）。杨荣贵博士受邀举办过100余场学术讲座，发表了近200多次会议演讲和海报。杨荣贵博士在过去15年的教学生涯中，已经培养了30多位博士生和博士后。其中已有约20位被中国科学院、上海交通大学、同济大学、华中科技大学、东南大学、吉林大学聘为教授/研究员、副教授，3位任职于美国大学, 也为Intel, Cummins, Chevron输送了一批高端科技人才。