题  目：Magnetocaloric Cooling and Energy Harvesting Systems
 报告人：Prof. Raju V. Ramanujan (School of Materials Science and Engineering, Nanyang Technological University, Singapore)
 时  间：2017年10月11日（星期三）9:00
 地  点：麟鸿楼14-205会议室
 欢迎广大师生参加!
  
                                材料科学与工程学院
                                2017年9月29日
  
 内容摘要： Magnetocaloric materials offer an outstanding opportunity to  develop novel, energy efficient, environmentally friendly, green thermal  management systems. The energy efficiency has already been demonstrated  to be vastly superior to conventional gas compression systems. The main  obstacle to commercialization is the cost of conventional  magnetocaloric materials which are based on expensive rare earth  materials, e.g., Gd. Hence, we developed rare earth free, low cost, high  performance Fe and Mn based magnetocaloric materials.
 A self-pumping magnetic cooling system was constructed with magnetic  nanoparticles in a suspension used as the ferrofluid. It was found that  the system performance depends strongly on heat load, magnetic field,  and volume fraction of particles and density of ferrofluid. Cooling by ~  35 °C has been achieved by application of a small 0.3 T magnetic field.  This technique has considerable potential for electronic cooling  applications since there is no external energy input and no moving  mechanical part.
  
 报告人简介：Raju V.  Ramanujan教授是新加坡南洋理工大学材料科学与工程学院副主席，美国材料协会会员。曾分别担任IEEE国际磁学会议，功能材料分会、TMS相变委员会和评奖委员会（美国）、IEEE技术委员会（美国）执行主席，美国TMS磁性材料委员会主席。现担任Scientific  Reports (Nature Publishing Group),Nanomedicine, Metallurgical and  Materials Transactions, Materials Science and Engineering B, and  Materials Science and Engineering  C等国际期刊的主编/编委。他是华南理工大学（中国），北德克萨斯大学（美国），印度理工学院，孟买大学和先进科学研究中心（印度）的客座教授。他的研究主要集中在有关先进能源、生物医药，传感器和芯片实验室系统的磁性纳米技术。