Tailored materials for magnetic refrigeration around room temperature

用于室温附近磁制冷的定制材料

• 批准号: 29815782
• 负责人: Privatdozent Dr. Manuel Richter
• 金额: --
• 依托单位: Leibniz-Institut für Festkörper- und Werkstoffforschung Dresden (IFW) e.V.
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2006
• 资助国家: 德国
• 起止时间: 2005-12-31 至 2008-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/29815782?language=en
• 关键词: Tailored; materials; magnetic; refrigeration; around

Room-temperature magnetic refrigeration is about to take over from the conventional compressor-based refrigeration technology. The main disadvantages of the latter are the high capital cost of the com- pressor, its low degree of efficiency, and the use of explosive or ozone depleting gases. The new technology will considerably reduce these drawbacks and thus lead to significant cost and energy savings. Magnetic refrigerators use solid refrigerants and common heat-transfer media (water, water-alcohol solution, air, or helium gas) that do not pose any environmental or other danger. Crucial for the commercial viability of magnetic refrigeration is finding the right working material. Mag- netic refrigerants are to fulfill a number of criteria, like a large magneto-caloric e®ect at operating tem- perature, high thermal and low electrical conductivity, mechanical and chemical stability, low toxicity and materials cost. The proposed project aims at searching for metallic refrigerants that would outperform Gd metal, which has been used in almost all prototype devices produced till now. Thus it may bring about a breakthrough in the practical application (household, automobile, food industry, computers ...) of magnetic refrigeration.

室温磁制冷即将取代传统的基于压缩机的制冷技术。后者的主要缺点是压缩机的高资本成本、低效率以及使用爆炸性或臭氧消耗气体。新技术将大大减少这些缺点，从而大大节省成本和能源。磁制冷机使用固体制冷剂和常见的传热介质（水，水-酒精溶液，空气或氦气），不会造成任何环境或其他危险。磁制冷的商业可行性的关键是找到合适的工作材料。磁制冷剂要满足许多标准，如在操作温度下的大磁热效应、高导热性和低导电性、机械和化学稳定性、低毒性和材料成本。拟议的项目旨在寻找性能优于Gd金属的金属制冷剂，Gd金属已用于迄今为止生产的几乎所有原型设备。因此，它可能会在实际应用中带来突破（家庭，汽车，食品工业，计算机.）磁制冷