通过多细胞架构实现千瓦级的弹性热量冷却
Guoan Zhou1, Lingyun Zhang2, Zexi Li3
1Department of Mechanical and Aerospace Engineering, The Hong Kong University of Science and Technology, Hong Kong, China. meguoanzhou@ust.hk.
Nature
|February 26, 2025
概括
本研究介绍了一种使用形状记忆合金 (SMA) 的千瓦级弹性热量冷却装置. 新的多细胞架构实现了高冷却功率,为传统制冷提供了绿色替代方案.
科学领域:
- 材料科学
- 热力学
- 可持续能源
背景情况:
- 使用形状记忆合金 (SMA) 的弹性热量冷却为传统冷却提供了环保和节能的替代方案.
- 目前基于SMA的冷却设备的冷却功率有限 (≤300W),阻碍了商业采用.
研究的目的:
- 开发一个具有增强冷却功率的千瓦级弹性热量冷却装置.
- 证明基于SMA的冷却技术的商业可行性.
主要方法:
- 使用压缩管状NiTi构建了一个新的"串联流体并行SMA"多细胞架构.
- 采用薄壁管状NiTi,以实现高表面积/体积比和高频率运行 (3.5Hz).
- 使用石墨烯纳米流体作为有效的传热剂.
主要成果:
- 达到12.3W/g的特定冷却功率.
- 在零温度升降时显示了1284W的冷却功率.
- 设备在50万个循环中保持性能.
结论:
- 开发的多细胞架构和优化的材料配置可实现千瓦级的弹性热量冷却.
- 这项技术显示出作为一个可持续和高效的冷却解决方案的巨大潜力.
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