Pillar-supported Core Structure for Vacuum Insulation Panel
Vacuum insulation panels (VIPs) have outstanding insulation performance It is about 5 to 10 times higher than that of the conventional insulators such as polyurethane foam and glass wool.The filler material of VIP has a great effect on this insulation performance,and it is known that its thermal conductivity is roughly proportional to the density 1.Thus,if the external pressure on the filler material is released,insulation performance can be enhanced.A pillar-supported core structure proposed in this paper consists of a support structure and a filler material to achieve this object.The support structure sustains the atmospheric pressure instead of the filler material and it is composed of the top and bottom cover plates with pillars inserted between them.For this reason,the support structure is designed considering the mechanical stability and the heat transfer mechanism.A specimen is fabricated using cover plates made of stainless steels,pillars with multi-path supports (MPS) and a filler material.The MPS has a relatively long heat conduction path and the filler material is multi-layered with glass wool sheets and Al-metallized radiation shields.The thermal conductivity measured with a vacuum guarded hot plate (VGHP) is 18 mW/(m · K),which is about half of the current VIP thermal conductivities.
vacuum insulation panels insulation performance support structure filler material pillar
Bongsu Choi Tae-Ho Song
School of Mechanical, Aerospace and System Engineering, Korea Advanced Institute of Science and Technology,Daehak-ro 291, Yuseong-gu, Daejeon, Korea
国际会议
The 12th International Vacuum Insulation Symposium (IVIS 2015)(第十二届国际真空绝热材料会议)
南京
英文
23-26
2015-09-01（万方平台首次上网日期，不代表论文的发表时间）