Composite aerogel insulation for cryogenic liquid storage

26th International Cryogenic Engineering Conference & International Cryogenic Materials Conference 2016

材料科学;物理学

Kyeongho, Kim^1 ; Hyungmook, Kang^2 ; Soojin, Shin^2 ; In Hwan, Oh^3 ; Changhee, Son^1 ; Yun Hyung, Cho^4 ; Yongchan, Kim^1 ; Sarng Woo, Karng^2

Department of Mechanical Engineering, Korea University, Anam-dong, Seongbuk-gu, Seoul

136-713, Korea, Republic of^1

Center of Urban Energy Research, Korea Institute of Science and Technology, 5, Hwarang-ro 14-gil, Seongbuk-gu, Seoul

02792, Korea, Republic of^2

Green City Technology Institute, Korea Institute of Science and Technology, 5, Hwarang-ro 14-gil, Seoul, Seongbuk-gu

02792, Korea, Republic of^3

Mechanical and Biomedical Engineering, Kangwon National University, Hyoja 2-dong, Chuncheon-si, Kangwon-do

200-701, Korea, Republic of^4

关键词: Aerogel blankets;    Composite aerogel;    Cryogenic fluids;    Effective thermal conductivity;    Experimental apparatus;    Insulation materials;    Maximum temperature;    Thickness profiles;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/171/1/012093/pdf
DOI  :  10.1088/1757-899X/171/1/012093

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

High porosity materials such as aerogel known as a good insulator in a vacuum range (10-3∼ 1 Torr) was widely used to storage and to transport cryogenic fluids. It is necessary to be investigated the performance of aerogel insulations for cryogenic liquid storage in soft vacuum range to atmospheric pressure. A one-dimensional insulating experimental apparatus was designed and fabricated to consist of a cold mass tank, a heat absorber and an annular vacuum space with 5-layer (each 10 mm thickness) of the aerogel insulation materials. Aerogel blanket for cryogenic (used maximum temperature is 400K), aerogel blanket for normal temperature (used maximum temperature is 923K), and combination of the two kinds of aerogel blankets were 5-layer laminated between the cryogenic liquid wall and the ambient wall in vacuum space. Also, 1-D effective thermal conductivities of the insulation materials were evaluated by measuring boil-off rate from liquid nitrogen and liquid argon. In this study, the effective thermal conductivities and the temperature-thickness profiles of the two kinds of insulators and the layered combination of the two different aerogel blankets were presented.