Mg基相变储热材料设计与热循环中的传热传质行为研究

项目名称： Mg基相变储热材料设计与热循环中的传热传质行为研究

项目编号： No.51206125

项目类型： 青年科学基金项目

立项/批准年度： 2013

项目学科： 工程热物理与能源利用学科

项目作者： 李元元

作者单位： 武汉理工大学

项目金额： 25万元

中文摘要： 高温储热技术是太阳能热发电中的重要技术，而高温储热材料的性能是高温储热技术中的关键，直接关系到太阳能热发电的效率和成本。本项目通过研究Mg基高温相变储热材料的结构与相变温度、相变潜热、比热容和热导率等热物理性能的影响机制，建立Mg基相变储热材料结构与热物理性能的对应关系，探索新型金属基高温相变储热材料的构建体系；通过研究Mg基相变储热材料在高温静态下与容器材料的物理化学相容性，探索Mg基相变储热材料的高温热稳定性和热腐蚀性；通过研究Mg基高温相变储热材料在高温热循环过程中原子结构、相组成与储热性能的演变规律，探索金属基高温相变储热材料在高温热循环过程中的传热传质规律，为太阳能热发电技术中金属基高温相变储热材料的应用提供理论依据。

中文关键词： 太阳能热发电；相变储热；Mg合金；热物性；

英文摘要： The high temperature thermal energy storage method, as a technique in solving the matching of energy supply and demand, plays an important role from the points of view of thermal efficience.The thermal energy storage material is the key factor in the thermal energy storage system. One of the main purpose of this investigation is to design series Mg based latent heat storage alloys. The structure and thermal properity of the designed alloys are investigated by corresponding characterization technique. The relationship between the struction and the thermal property such as the heat capacity, thermal conductivity, phase change latent and temperature of the designed materials are investigated to research the influence mechanism of the thermal property.Secondly, the physical and chemical compatibility of the Mg based alloys and container material are also investigated to detemine the high temperature thermal stability and heat corrosion of the designed Mg based phase change thermal storage alloys. Lastly, the evolution of the atomic struction, phase composition and heat storage property during the heating and cooling process is studied to explore the heat and mass transfer hehavior during the thermal cycling. The above investitation is of great importance for the application of the high temperature thermal storage m

英文关键词： Solar Thermal Power；Phase Change Thermal Storage；Mg Alloys；Thermal Physical Property；