AI 中文总结
该研究开发了采用增材制造换热器的液氮预冷系统，对比传统换热器验证其成本与性能优势，可降低大型仪器天文台的运行成本。
AI 中文摘要
现代天文台几乎普遍使用液氮作为预冷用的低温流体，该方法效率低下，因为它仅依靠换热器内可用表面积使流体蒸发，未回收任何潜热。增材制造换热器可通过增加蒸发面积及能与气态氮相互作用的内部结构解决该效率问题。研究人员开发了一种利用现有低温恒温器的微型预冷系统，通过记录冷却带仪器质量所需时间，对比传统与增材制造换热器的性能。研究发现，与传统单元相比，增材制造换热器在成本和性能上具有明显优势，可降低配备HARMONI等大型仪器的天文台的运行成本。
英文摘要
Using liquid Nitrogen as the cryogenic fluid for pre-cooling purposes is almost ubiquitous across modern observatories. That method tends to be inefficient since it relies on the evaporation of the fluid afforded by the available surface area within the exchanger without capturing any of its latent heat. An additively manufactured heat exchanger could address that inefficiency by providing an increased evaporation area as well as internal structures that can interact with Nitrogen in its gaseous phase. A miniature pre-cooling system utilizing an existing cryostat was developed so the performance of conventionally and additively manufactured heat exchangers would be compared by recording the time required to cool an instrumented mass. Our findings indicate that there is a clear cost and performance advantage of additively manufactured heat exchangers when compared to conventional units, that could lead to reducing the operating costs of observatories hosting large size instruments such as HARMONI.
