报告题目：

Elastocaloric cooling: mechanisms, materials and systems

报告人:                      Dr.  Huilong Hou

 Department of Materials Science and Engineering, University of Maryland,

College Park, Maryland 20742  

时间：2017年12月26日（周二）9:00

地点：中科院力学所1号楼344会议室

报告摘要：

 We are actively developing prototypes of elastocaloric cooling systems using mechanisms based on compression of shape memory alloys. We are compressing bundles of NiTi tubes while heat exchange fluid flows through the tubes. A key component is a heat recovery system implemented to maximize efficiency of heat exchange. We have observed cooling DeltaT of 4.5 K at 70 W, as directly measured in cooled water. A latest prototype was designed to deliver 400 W. We have demonstrated when properly loaded, NiTi tubes can survive up to at least ~ 0.3 million cycles without any degradation in cooling capacity. We carry out combinatorial investigation of ternary and quaternary alloys to identify new compositions with enhanced latent heat and reduced critical stress. Our material optimization processes include developing understanding the effect of atomic structure and microstructure on latent heat and fatigue. This project is funded by DOE ARPA-E and DOE EERE CaloriCool.

报告人简介：

侯慧龙，美国马里兰大学博士后研究助理，美国国家标准和技术研究所客座研究员。2012年毕业于北京航空航天大学固体力学专业，获得硕士学位，师从蒋持平教授；2015年毕业于美国宾夕法尼亚州立大学工程科学与力学专业，获得博士学位，师从Reginald F. Hamilton 教授。主要研究方向为高性能金属智能材料的先进制造方法和前沿应用技术。最近5年，在工程科学与力学领域的重要期刊以第一作者发表11篇论文。曾获美国宾夕法尼亚州立大学“朗格内克奖学金”（2015）、美国宾夕法尼亚州立大学工程科学与力学系“研究生科研二等奖”（2015），中国力学学会“全国徐芝纶力学优秀学生奖” （2009），中国周培源大学生力学竞赛“全国三等奖”（2009），中国孙训方力学竞赛“四川省一等奖”（2008）等奖项。