Elastocaloric cooling systems can evolve into an environmentally friendly alternative to compressor-based cooling systems. One of the main factors preventing its application is a poor long-term stability of the elastocaloric material. This especially applies to systems that work with tensile loads and which benefit from the large surface area for heat transfer. Exerting compressive instead of tensile loads on the material increases long-term stability—though at the expense of cooling power density. Here, we present a heat transfer concept for elastocaloric systems where heat is transferred by evaporation and condensation of a fluid. Enhanced heat transfer rates allow us to choose the sample geometry more freely and thereby realize a compression-based system showing unprecedented long-term stability of 10⁷ cycles and cooling power density of 6270 W kg⁻¹.

弹性热量冷却系统可以发展成为基于压缩机的冷却系统的环保替代品。阻碍其应用的主要因素之一是弹性热材料的长期稳定性差。这尤其适用于承受拉伸载荷并受益于大表面积传热的系统。对材料施加压缩载荷而不是拉伸载荷可提高长期稳定性——尽管以冷却功率密度为代价。在这里，我们提出了弹性热系统的传热概念，其中通过流体的蒸发和冷凝来传递热量。增强的传热率使我们能够更自由地选择样品几何形状，从而实现基于压缩的系统，显示出前所未有的长期稳定性 10 ⁷6270 W kg ^{-1 的}循环和冷却功率密度。