New concepts are required for high‐performance minichannel evaporators with low mass and reduced size involved in the cooling of cylindrical or conical surfaces. The development of one‐piece stainless‐steel evaporators using flow boiling CO₂ for the cooling of conical copper test specimens heated by a foil heater element is presented. The specimens mimic a mobile cooling device used in high‐energy and particle physics. The stainless‐steel evaporators were manufactured with a state‐of‐the‐art 3D stainless‐steel printer via selective laser melting. The computer‐aided design and the construction of this new type of evaporators are described. A dedicated two‐phase accumulator controlled loop filled with liquid CO₂ was developed, it allowed for operating four parallel connected evaporators. Cooling efficiency and manufacture reproducibility were experimentally investigated by applying different thermal loads and refrigerant mass flows.

中文翻译：

---

使用流动沸腾二氧化碳的不锈钢单钢3D打印微型通道蒸发器

高性能的微型通道微型蒸发器需要新的概念，这些微型蒸发器具有较小的质量和较小的尺寸，可用于冷却圆柱形或圆锥形表面。提出了使用流动沸腾的CO ₂来冷却由箔片加热元件加热的圆锥形铜试样的一体式不锈钢蒸发器的开发。标本模仿了高能和粒子物理学中使用的移动式冷却装置。不锈钢蒸发器是通过最先进的3D不锈钢打印机通过选择性激光熔化制造的。描述了这种新型蒸发器的计算机辅助设计和结构。充满液体CO _2的专用两相蓄能器控制回路开发后，它允许运行四个并联的蒸发器。通过应用不同的热负荷和制冷剂质量流量，对冷却效率和制造重复性进行了实验研究。