过冷液氮和氮浆的制备及在低温保存中的应用  

Preparation of supercooled LN2 and nitrogen slurry and their applications in cryopreservation

作　　者：李名声 张绍志[1] Li Mingsheng;Zhang Shaozhi(Institute of Refrigeration and Cryogenics/Key Laboratory of Refrigeration and Cryogenic Technology of Zhejiang Province,Zhejiang University,Hangzhou 310027,China)

机构地区：[1]浙江大学制冷与低温研究所,浙江省制冷与低温技术重点实验室,杭州310027

出　　处：《低温与超导》2023年第7期17-23,98,共8页Cryogenics and Superconductivity

基　　金：浙江省自然科学基金(LY22E060003);浙江省血液安全研究重点实验室开放课题(2022KF002)资助。

摘　　要：过冷液氮和氮浆是重要的低温冷却剂,与饱和液氮相比它们能够提供更好的冷却效果,在低温冷却领域极具应用潜力。本文对过冷液氮和氮浆的制备的方法进行了总结;归纳了过冷度、流速、固相比例及粒径大小等因素对过冷液氮和氮浆的传热特性的影响;陈述了过冷液氮和氮浆在生物材料玻璃化保存中的应用优势,也对重复制取困难和在某些案例玻璃化保存中未显现优势等问题做了总结。Subcooled liquid nitrogen(LN2)and nitrogen slurry are important cryogenic coolants which could provide better cooling effect than saturated liquid nitrogen,and have high potential in field of cryogenic cooling.The preparation methods of sub⁃cooled liquid nitrogen and nitrogen slurry were summarized,the effects of subcooling degree,flow rate,solid-phase ratio and particle size on the heat transfer characteristics were analyzed,the application advantages in the vitrification preservation of bio⁃logical materials and the difficulties of repeated preparation and the lack of advantages in some cases of vitrification preservation were described.

关 键 词：过冷液氮 氮浆 流动特性 传热 低温保存 

分 类 号：TB69[一般工业技术—制冷工程]