应能源与动力工程学院王秋旺教授邀请，美国明尼苏达大学机械工程系教授12月18日来我校进行学术访问并进行学术报告，欢迎各位老师和同学届时参加讲座并讨论交流。

题 目：  Reactor hot spot, temperature un-uniformity, and temperature instability issues: promising solutions via creative designs

报告人： Nesrin Ozalp，美国明尼苏达大学

时 间： 12月18号（星期二）下午16:15-17:45

地 点： 东三楼东汽报告厅

邀请人： 王秋旺 教授

报告人简介：Nesrin Ozalp，女，美国明尼苏达大学机械工程系教授和比利时鲁汶大学机械工程系兼职教授，ASME Fellow，热工领域权威期刊ASME Journal of Thermal Science and Engineering Applicaitons副主编和Frontiers in Mechanical Engineering副主编。主要从事新能源技术和可再生能源利用中的关键科学问题研究。Ozalp教授作为首席科学家承担的科研项目经费超过400万美元，目前已经发表的国际期刊论文、专著、国际会议论文共计超过100篇，目前已指导超过20位研究生的毕业论文。Ozalp教授曾被许多著名研究单位邀请并做过超过30次主题报告，其中包括法国国家科研中心（CNRS）、德国航空航天中心（DLR）、美国能源部（DOE）、苏黎世联邦理工学院（ETH）、Fraunhofer-IWS、北约高级研究研讨会（ARW）、以及荷兰代尔夫特理工大学等。多次获研究与教学奖项，其中包括：ASME Heat Transfer领域杰出评阅人奖、德州农工大学校友协会颁发的杰出教学奖等。Ozalp教授在新能源技术领域颇具影响力。

报告内容简介：With the increasing concern of carbon dioxide emissions and climate change, more focus should be on solar technologies for producing storable fuels, so-called “solar fuels”. Solar fuel production relies on concentrated solar energy as the heat source for direct decomposition of a chemical feedstock via solar thermochemical processes, which significantly reduce emissions in comparison to traditional processes heated via fossil fuel combustion. The heart of solar thermochemical processes is a solar reactor, which typically features a cavity-type receiver for effective capture of concentrated solar radiation entering the reactor through a small aperture. The basic principle of solar thermochemical processes is that the reactants inside a solar reactor absorb and distribute thermal energy via radiation and convection. Concentrated solar energy raises the reactants' temperature to the dissociation temperature and drives the intensive endothermic decomposition process inside the solar reactor. Therefore, it is important to monitor and control the temperature of the solar reactor. In particular, a uniform temperature distribution without hot spots inside the solar reactor is essential for higher overall efficiency, which can be achieved through meticulous solar reactor design. The main challenge to achieve uniform and stable temperature inside reactor is the design of the solar reactor. This presentation demonstrates extensive use of CFD to explain the physics behind complex solar thermochemical process and use of CFD to iteratively design a solar reactor which is pioneered by the presenter. The CFD approach will show systematic methodology based on multi-physics/multi-scale tools, the influence of flow dynamics on heat transfer, and impact of catalysts on heat transfer and fuel production efficiency to reduce hotspots, enhance temperature uniformity, and to control temperature stability.

主办单位：热流科学与工程教育部重点实验室