| 摘要: |
| 自复叠制冷技术因具有较宽的制冷温区、结构简单且运行可靠等优势，在普冷以及深冷领域具有广阔的应用前景。自复叠制冷循环的新流程构建与混合工质的多元化已进行了广泛的研究，但如何主动调控系统内混合工质的组分浓度进而提升系统性能一直是技术瓶颈和研究难点。首先综述了国内外关于自复叠制冷系统的总体研究现状，阐述了其循环流程构建的发展历程。然后，总结了影响系统效率的组分分离与组分偏移特性两方面的研究进展。文中从制冷循环改进与关键元件—气液分离器性能讨论了组分分离方面的研究，并总结了组分迁移的原因、组分迁移特性的研究现状以及相积存的理论计算模型。在此基础上，介绍了现有研究中对于自复叠制冷系统工质组分浓度调控的方法。通过总结自复叠制冷技术在以上四方面的研究现状，提出未来领域内应重点关注的研究方向——组分优化调控，为进一步提升自复叠制冷系统性能提供借鉴与参考。 |
| 关键词: 自复叠制冷 混合工质 组分分离 组分迁移 组分调控 |
| DOI： |
| 投稿时间：2022-10-10 修订日期：2023-03-08
录用日期：2023-04-17 |
| 基金项目:国家自然科学基金（52076160）资助项目。 |
|
| Review of Research Progress on Auto-Cascade Refrigeration Systems and Component Separation, Migration, and Regulation |
|
Li Yinlong, Liu Guoqiang, Liu Jiarui, Chen Qi, Yan Gang
|
| (School of Energy and Power Engineering, Xi'an Jiaotong University) |
| Abstract: |
| Auto-cascade refrigeration technology has broad application prospects in refrigeration and cryogenic refrigeration owing to its wide operating temperature range, simplicity, and reliability. The construction of new refrigeration cycles and the diversification of mixtures have been extensively studied. The active regulation of mixture concentrations in auto-cascade refrigeration systems to improve performance has been a technical bottleneck and research challenge. This study first reviews the state-of-the-art auto-cascade refrigeration systems and describes the history of refrigeration cycles. Research on the component separation and migration characteristics of zeotropic mixtures, which affect system efficiency, is also summarized. Research on component separation is discussed in terms of refrigeration cycle improvement and the separation performance of the key component – the gas-liquid separator. The causes of component migration, the current status of research on component migration characteristics, and theoretical models of phase accumulation are summarized. Based on this, existing research methods for the regulation of zeotropic mixture components in auto-cascade refrigeration systems are presented. This study summarizes the current status and research directions of component optimization and control as a reference for further performance improvement of auto-cascade refrigeration systems. |
| Key words: auto-cascade refrigeration mixtures component separation component migration component regulation |
