Aerogel-Based Insulation Materials for Cryogenic Applications

27th International Cryogenics Engineering Conference and International Cryogenic Materials Conference 2018

Fesmire, J.E.^1

Cryogenics Test Laboratory, Exploration Research and Technology, Mail Code UB-R1 NASA Kennedy Space Center KSC, FL

32899, United States^1

关键词: Boundary temperature;    Cryogenic applications;    Effective thermal conductivity;    Flexible composites;    Insulation materials;    Multi-layer insulation;    Thermal insulation systems;    Thermal Performance;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/502/1/012188/pdf
DOI  :  10.1088/1757-899X/502/1/012188

来源: IOP

【 摘 要 】

Many different aerogel-based materials are now being used in thermal insulation systems for cryogenic applications. These materials include flexible composite blankets, bulk-fill particles, and polymer composites in both evacuated and non-evacuated environments. In ambient environments, aerogels provide superior thermal performance compared to conventional polymeric foam and cellular glass insulations while offering unique advantages in solving problems with weathering, moisture, and mechanical damage. Aerogels are also used as spacer materials in multilayer insulation systems. These layered systems provide combined structural-Thermal capability for cryogenic systems in either vacuum-jacketed or externally-Applied insulation designs. Test data (effective thermal conductivity) include a wide range of both commercial and experimental aerogel materials. Testing was performed using laboratory cryostats and standard methods for boundary temperatures 293 K and 78 K. Examples of aerogel-based insulation systems are given for both evacuated and non-evacuated applications.