变密度多层绝热最优层密度研究  

Study on optimal layer density of variable density multilayer insulation

作　　者：王田刚[1] 李延娜[2] 姚淑婷[2] 陈叔平[2] 王丽红[1] 冶文莲[1] 

机构地区：[1]兰州空间技术物理研究所真空低温技术与物理重点实验室,兰州730000 [2]兰州理工大学石油化工学院,兰州730050

出　　处：《低温与超导》2014年第7期6-9,48,共5页Cryogenics and Superconductivity

摘　　要：基于正交实验法对变密度多层绝热(VD-MLI)设计不同层密度组合方案,同时采用逐层传热分析模型进行漏热量计算。结果表明不同层密度组合的VD-MLI漏热量不同,VD-MLI最优层密度组合方案为低密度区8层/cm,中密度区14层/cm,高密度区20层/cm。在最优层密度组合基础上,确定了不同热端温度条件下,液氮、液氧、液态甲烷VD-MLI满足漏热量要求的最小厚度。热端温度165K,液氮最小厚度9mm,液氧8mm,液态甲烷6mm;热端温度300K,液氮最小厚度39mm,液氧38mm,液态甲烷36mm;热端温度400K,液氮最小厚度94mm,液氧93mm,液态甲烷92mm。Different combinations of layer densities were designed based on the orthogonal experimental method for variable density muhilayer insulation（ VD - MLI）, and heat leakage of VD - MLI was calculated with Layer - by - layer. The results show that heat leakage of YD - MLI is different under different combinations of layer densities, and optimal layer density combination of VD - MLI is established： 8 layers/cm for low density domain, 14 layers/cm for medium density domain, 20 layers/cm for high density domain. Based on the optimal layer density combination, the minimum thickness of LN2, L02, LCH4 under different thermal boundary temperatures, which met the requirements of heat leakage, was determined. When the thermal boundary tem- perature is 165K, the minimum thickness of LN2, LO2, LCH4 is 9, 8, 6mm, respectively; when the thermal boundary temperature is 300K, the minimum thickness of LN2, LO2, LCH4 is 39, 38, 36mm, respectively; when the thermal boundary temperature is 400K, the minimum thickness of LN2, L02, LCH4 is 94, 93, 92mm, respectively.

关 键 词：变密度多层绝热 逐层传热分析模型 正交实验 层密度组合 

分 类 号：TQ461[化学工程—制药化工]