Mechanical Structures for Vacuum Insulation Panel (VIP) Cores

摘要：

　　A mechanical structure for a vacuum insulation panel (VIP) core would have superior thermal performance to a fumed silica or fiberglass core as long as it could maintain a higher ratio of mechanical stress to thermal conductivity.The thermal conduction component of the heat transfer across a VIP is reduced with a mechanical structure like periodic supports by the factor,(k(s)σsup/ksupatm) It has been demonstrated that supports fabricated from 25μm thick 304 stainless steel could support up to a 965 MPa load (σsup).Assuming thermal conductivities of 16 and 0.0025 W/(m · K) for stainless steel (kss) and fumed silica (kfs) respectively.A fumed silica core would have up to a 50% higher thermal conduction than a mechanical structure.The ratio of the mass of a fumed silica core to a mechanical structure isρfsσss/ρssatm),and can be 180 times higher for fumed silica assuming a density of 0.15 (ρfs) and 8.0 (ρss) gm/cm3 respectively.The reduction in thermal conduction and mass increase if a titanium alloy with a lower thermal conductivity and density is used instead of stainless steel.Glass columns would be another potential replacement since they could support a compressive stress of 50MPa and have a thermal conductivity of 1.1 W/(m · K).This research work did not evaluate commercially available filaments as tensile support structures.

关键词： vacuum insulation panels mechanical core

作者: Alan Feinerman Tomas Juocepis Ravi Patel Tatjana Dankovic Prateek Gupta

作者单位: Thermal Conservation Technologies, 8853 Kenneth Terrace, Skokie, Illinois, 60076, USA;Department of Thermal Conservation Technologies, 8853 Kenneth Terrace, Skokie, Illinois, 60076, USA Department of Electrical and Computer Engineering, University of Illinois at Chicago, Chicago, Illin

会议类型: 国际会议

会议名称: The 12th International Vacuum Insulation Symposium (IVIS 2015)(第十二届国际真空绝热材料会议)

会议地点: 南京

会议语种:英文

页码: 64-66

在线出版日期: 2015-09-01（万方平台首次上网日期，不代表论文的发表时间）