Enhancement of Effective Thermal Conductivity
Due to the heterogeneous structure of vacuum insulation panel consisting of core material and envelope,effective thermal conductivity(ETC) is generally used to differentiate the performance of VIP.ETC is calculated by the sum of thermal conductivity value of center of panel and edge of envelope (linear thermal transmittance): λeff=λcop +(φ)(d) dp/A,where cop is center-of-panel,d is the thickness of the VIP (in the heat flux direction) (m),A is the surface area of the VIP (perpendicular to the heat flux direction) m2 and p is the perimeter of the surface A (m).Actually,ETC value is matched well with the energy efficiency measured after installing in refrigerator.VIP manufactures have been keen competitions to get the lower ETC value through the modification of core material and envelope.Recently,it is noticed that the simple replacements of materials cannot lead to further reduction of ETC value.The detailed approaches based on scientific mechanism are needed to win in VIP market.In this paper,An approach to overcome technical limitations,and the kinds of efforts needed to make a breakthrough in the performance of the VIP,are discussed.
vacuum insulation panels effective thermal conductivity linear thermal transmittance
SeongMoon Jung Myung Lee SonCheal Bang SungSeock Hwang JungPil Han SeungMin Jeon
CRD Lab.LG Hausys R&D, 77 Heungan-daero 81 beon-gil, Dongan-gu, Anyang-si Gyunggi-do, 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
196-199
2015-09-01（万方平台首次上网日期，不代表论文的发表时间）