低温储罐用多层绝热材料绝热性能优化  

Thermal Insulation Performance Optimization of Multi-layer Insulation Materials for Cryogenic Storage Tanks

作　　者：余家愿 周文杰 徐佳琦 邱一男 YU Jiayuan;ZHOU Wenjie;XU Jiaqi;QIU Yinan(School of Automation,Hangzhou Dianzi University,Hangzhou 310018,China;State Key Laboratory of Aerospace Cryogenic Propellant Technology,Beijing 100190,China)

机构地区：[1]杭州电子科技大学自动化学院,杭州310018 [2]航天低温推进剂技术国家重点实验室,北京100190

出　　处：《真空与低温》2024年第6期712-718,共7页Vacuum and Cryogenics

基　　金：推进剂国家重点实验室开放课题(SKLTSCP202203);浙江省自然科学基金白马湖联合基金重点项目(LBMHZ24E060005)。

摘　　要：为探讨多层绝热材料(MLI)间隔物层的层密度和间隔层材料的热导率对绝热性能的影响,利用层与层模型,在20~300 K的温度范围内采用仿真计算的方法,研究了多层绝热材料的绝热性能与间隔层材料热导率和层密度之间的关系。在此基础上,根据不同间隔层材料的热导率随温度变化的特性,提出了一种变密度和变间隔层材料复合多层绝热结构(VDS-MLI)。在设定的仿真条件下,等层密度,采用涤纶薄膜和干法纸作为间隔层材料的多层绝热结构的漏热热流分别为0.3596 W/m^(2)和0.3642 W/m^(2),而VDS-MLI结构的漏热热流为0.3213 W/m^(2),相较于前两种结构,VDS-MLI的绝热效果分别提升10%和12%。结果表明,在特定温度范围内,VDS-MLI漏热热流密度显著降低,MLI的绝热性能得到了明显提升。研究为多层绝热材料的设计和应用提供了新思路,并有望在低温绝热等领域中发挥重要作用。This study investigates the factors influencing the thermal insulation performance of Multi-Layer Insulation(MLI),particularly focusing on layer density and the thermal conductivity of separator materials.Using a layer-by-layer model and simulation calculations within the temperature range of 20 K to 300 K,we explore the relationship between MLI's thermal insulation performance and these factors.Based on our findings,we propose a novel structure called Variable Density and Variable Separator Material Composite Multi-Layer Insulation(VDS-MLI),which considers the temperature-dependent thermal conductivity of different interlayer materials.Under our simulation conditions,we find that VDS-MLI significantly outperforms traditional structures,with a 10%to 12%improvement in thermal insulation performance.This innovative approach holds promise for enhancing thermal insulation efficiency and offers new avenues for the design and application of multi-layer insulation materials,particularly in low-temperature environments.

关 键 词：变间隔材料 多层绝热 变层密度 热导率 

分 类 号：TB657[一般工业技术—制冷工程]