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

本项目的主要目标是研制基于镍钛形状记忆合金的连续运行空冷演示装置。为了延续在SPP 1599第一个资助期（C1、C2和C3）期间已经建立的合作，这项任务将由萨尔兰大学（Seelecke，Schütze）的机电一体化工程和鲁尔大学波鸿（Eggeler，Frenzel）的材料科学共同努力解决。虽然在第一阶段的重点主要是对基本原理的弹性热冷却过程的基本理解，在第二阶段的重点将是对这一理解转化为一个工作的冷却单元。与前一阶段一样，这将需要材料科学和机电一体化工程的跨学科方法（Schütze，Seelecke：冷却单元的设计和制造），（Seelecke：模型开发）和（Eggeler，Frenzel：材料优化）。该装置将使用弹性热优化的镍钛基导线运行，并将能够在现实条件下对冷却效果进行首次评估。它也被用来作为一种跨平台的比较手段与其他铁冷却方法和传统的蒸汽压缩为基础的过程。我们将通过实施以下方法系统地解决该项目：1）我们将扩展我们目前的单线操作科学演示平台，以包括空气冷却效应，从而详细研究材料特性和工艺参数之间的相互作用。2)我们将设计和制造一个连续运行，旋转多丝风冷演示系统的基础上获得的过程见解1）。3)不同尺寸的不同的弹热优化线材将被集成到上述演示系统中，随后将在工艺条件下表征其冷却性能。4)建模工作将根据单线科学平台数据进行验证，用于各种弹性热量优化的合金。随后，它们将用于通过设备级模拟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.