Prediction of thermal performance of vacuum insulation panels (VIPs) with micro-fiber core materials

2020 ◽  
Vol 22 ◽  
pp. 100786 ◽  
Author(s):  
Shang Mao ◽  
Anakang Kan ◽  
Zipei Huang ◽  
Wenbing Zhu
Keyword(s):  
Thermal Performance ◽  
Fiber Core ◽  
Vacuum Insulation ◽  
Core Materials

Dependence of gas permeation and adsorption on temperature in vacuum insulation panels (VIPs) containing getter materials

2021 ◽  
pp. 174425912110171
Author(s):  
Hideya Yamamoto ◽  
Daisuke Ogura
Keyword(s):  
Glass Fiber ◽  
Adsorption Mechanism ◽  
Gas Adsorption ◽  
Gas Permeation ◽  
Fiber Core ◽  
Vacuum Insulation ◽  
Calculation Results ◽  
Long Term Performance ◽  
Term Performance

Vacuum insulation panels (VIPs) with a glass-fiber core has been considered to be difficult to operate for a long period of time, such as for building applications, because the thermal conductivity rises rapidly as the pressure increases. However, glass-fiber-core VIPs contain a material called a getter that continuously adsorbs permeated gas, and a theoretical model that considers the properties of the getter has not yet been developed. In this paper, the gas-adsorption mechanism by getters was investigated and a long-term-performance prediction model that considers the temperature dependence was proposed. Some gases were not adsorbed by the getter in the VIPs; however, a model was proposed that takes into account the non-absorbed gases by applying partial pressure to the adsorption isotherm in advance. The long-term performance of VIPs with different areas and volumes was compared with the measured values, and the validity of the calculation results was confirmed. These results show that the long-term performance of VIPs of different sizes can be accurately predicted when the getter performance is well understood.

Preparation and characterization of vacuum insulation panels with super-stratified glass fiber core material

Energy ◽  
2015 ◽  
Vol 93 ◽  
pp. 945-954 ◽  
Author(s):  
Zhou Chen ◽  
Zhaofeng Chen ◽  
Zhaogang Yang ◽  
Jiaming Hu ◽  
Yong Yang ◽  
...  
Keyword(s):  
Glass Fiber ◽  
Core Material ◽  
Fiber Core ◽  
Vacuum Insulation

scholarly journals Vacuum Insulation Panels: Analysis of the Thermal Performance of Both Single Panel and Multilayer Boards

Energies ◽  
2015 ◽  
Vol 8 (4) ◽  
pp. 2528-2547 ◽  
Author(s):  
Alfonso Capozzoli ◽  
Stefano Fantucci ◽  
Fabio Favoino ◽  
Marco Perino
Keyword(s):  
Thermal Performance ◽  
Vacuum Insulation

scholarly journals Impact of aeration and deaeration of switchable vacuum insulations on the overall heat conductivity using different core materials and filling gases

2020 ◽  
Vol 11 (4) ◽  
pp. 395-404
Author(s):  
Lars Erlbeck ◽  
S. Sonnick ◽  
D. Wössner ◽  
H. Nirschl ◽  
M. Rädle
Keyword(s):  
Silica Gel ◽  
Heat Conductivity ◽  
High Heat ◽  
Vacuum Insulation ◽  
Aeration Time ◽  
Helium Gas ◽  
New Type ◽  
Insulation Effect ◽  
Backbone Structure ◽  
Core Materials

Abstract Investigating switchable vacuum insulation panels might lead to a new type of insulation, which can be switched on to enable a low heat flow when a good insulation effect is desired and switched off when exchange with the environment is requested, during a cold summer night, for example. For this reason, different core materials for vacuum insulations as typical silica powder were investigated as well as silica agglomerates and silica gel. These materials were checked for the necessary time of aeration and evacuation and the corresponding change of heat conductivity along with the change of gas-pressure. Silica gel in combination with helium as filling gas showed best results corresponding to a high difference of the heat conductivities evacuated and aerated. Beside the solid backbone structure of the silica gel, this is caused by the high heat conductivity and small kinetic atomic diameter of the helium gas. Silica agglomerates decreased the aeration time as well as the deaeration time, but the improvement was neglected because of a lower change of heat conductivity during pressure drop or rise. Nevertheless, a good switchable vacuum insulation can be produced using silica gel and helium, for example.

Core Materials of Vacuum Insulation Panels: A Review and Beyond

2012 ◽  
Vol 174-177 ◽  
pp. 1437-1440 ◽  
Author(s):  
Cheng Dong Li ◽  
Zhao Feng Chen ◽  
Wang Ping Wu ◽  
Zhou Chen ◽  
Jie Ming Zhou ◽  
...  
Keyword(s):  
High Performance ◽  
Insulation Material ◽  
Vacuum Insulation ◽  
Novel Structure ◽  
Powder Particles ◽  
Insulation Performance ◽  
Size Powder ◽  
Material Powder ◽  
Core Materials

Vacuum insulation panels (VIPs) are regarded as one of the most promising high performance thermal insulation solutions on the market today. The insulation performance of VIPs mainly depends on the quality of core materials. This paper compared three types of core materials, namely foam insulation material, powder insulation material and fibrous insulation material. Novel structure of core materials which is fiber pore structures packed with different size powder particles is also put forward on this paper. The aim of this paper is to investigate and compare various properties, requirements and possibilities for traditional core materials and put forward possible future core materials of VIPs.

scholarly journals The Effect of Temperature on Thermal Performance of Fumed Silica Based Vacuum Insulation Panels for Buildings

2017 ◽  
Vol 111 ◽  
pp. 490-499 ◽  
Author(s):  
Alice Lorenzati ◽  
Stefano Fantucci ◽  
Alfonso Capozzoli ◽  
Marco Perino
Keyword(s):  
Thermal Performance ◽  
Fumed Silica ◽  
Effect Of Temperature ◽  
Vacuum Insulation

scholarly journals Development and thermal performance verification of composite insulation boards containing foam-encapsulated vacuum insulation panels

2018 ◽  
Vol 228 ◽  
pp. 1159-1172 ◽  
Author(s):  
Kaushik Biswas ◽  
Andre Desjarlais ◽  
Douglas Smith ◽  
John Letts ◽  
Jennifer Yao ◽  
...  
Keyword(s):  
Thermal Performance ◽  
Performance Verification ◽  
Vacuum Insulation
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