A Elastocaloric Shape Memory Cooling Demonstrator Unit - Design & Fabrication; Modeling; Material Optimization

本课题的主要目标是开发基于NiTishape记忆合金的连续运行风冷示范装置。在SPP1599第一个资助期（C1， C2和C3）已经建立的合作的延续，这项任务将由萨尔大学机电工程（Seelecke, sch<e:1>）和鲁尔大学材料科学（Eggeler, Frenzel）共同努力解决。在第一阶段，重点主要放在对弹性热冷却过程的基本原理的基本理解上，第二阶段的重点将放在将这种理解转化为工作冷却装置上。与前一阶段一样，这将需要材料科学和机电一体化工程（sch<s:1> tze， Seelecke：冷却装置的设计和制造）、（Seelecke：模型开发）和（Eggeler， Frenzel：材料优化）的跨学科方法。该装置将采用弹性热优化的镍基金属丝，并将在实际条件下首次评估冷却效果。它还打算用作与其他铁冷却方法和传统的基于蒸汽压缩的工艺进行跨平台比较的手段。我们将通过实施以下方法以系统的方式解决该项目：1)我们将扩展我们目前的单线操作科学演示平台，包括空气冷却效果，允许详细研究材料特性和工艺参数之间的相互作用。2)我们将基于在1)中获得的工艺见解设计和制造一个连续运行的旋转多线空气冷却演示系统。3)不同尺寸的不同弹性热优化线材料将集成到上述演示系统中，并随后在工艺条件下表征其冷却性能。4)针对各种弹性热优化合金的单线科学平台数据，将对建模工作进行验证。随后，他们将通过器件级模拟来支持多线发动机的设计，并开发其冷却性能的预测工具。

The main objective of this proposal is the development of acontinuously operating air cooling demonstrator unit based on NiTishape memory alloys. In continuation of the collaboration alreadyestablished during the first SPP1599 funding period (C1, C2 and C3),this task will be addressed by joint efforts of MechatronicsEngineering at Saarland University (Seelecke, Schütze) and MaterialsScience at Ruhr University Bochum (Eggeler, Frenzel). While in thefirst phase the focus was primarily on the basic understanding of theunderlying principles of an elastocaloric cooling process, the focusduring the second phase will be on the transformation of thisunderstanding into a working cooling unit. As in the previous phase this will require an interdisciplinary approach from Material Science and Mechatronics Engineering (Schütze, Seelecke: Design and fabrication of cooling unit), (Seelecke: Model development) and(Eggeler, Frenzel: Materials optimization). The unit will operate with elastocalorically optimized NiTi-based wires and will enable a first assessment of the cooling effect under realistic conditions. It is also intended to be used as a means for cross-platform comparison with other ferroic cooling methods and a conventional vapor-compressionbased process. We will address the project in a systematic way by implementing the following approach: 1) We will extend our current scientific demonstrator platform for single-wire operation to include air cooling effects, allowing for a detailed study of the interplay between material properties and process parameters. 2) We will design and fabricate a continuously operating, rotatory multi-wire air-coolingdemonstrator system based on the process insights gained in 1). 3) Different elastocalorically optimized wire materials in various sizes willbe integrated into the above demonstrator system, and their coolingperformance will subsequently be characterized under processconditions. 4) Modeling efforts will be validated against single-wire scientific platform data for various elastocalorically optimized alloys. They will subsequently be used to support the design of the multi-wire engine through device-level simulations and to develop a prediction tool for its cooling performance.