Durability of vacuum insulation panels in the cavity of an insulating glass unit

2014 ◽  
Vol 38 (6) ◽  
pp. 485-499 ◽  
Author(s):  
Frédéric Gubbels ◽  
Davide Dei Santi ◽  
Victor Baily
Keyword(s):  
Vacuum Insulation ◽  
Glass Unit

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.

Determining the thermal resistance of a highly insulated wall containing vacuum insulation panels through experimental, calculation and numerical simulation methods

2020 ◽  
pp. 174425912098003
Author(s):  
Travis V Moore ◽  
Cynthia A. Cruickshank ◽  
Ian Beausoleil-Morrison ◽  
Michael Lacasse
Keyword(s):  
Thermal Conductivity ◽  
Thermal Resistance ◽  
Effective Thermal Conductivity ◽  
Edge Effect ◽  
3D Simulation ◽  
Simulation Methods ◽  
Zone Method ◽  
Vacuum Insulation ◽  
Thermal Bridges ◽  
Wall Assembly

The purpose of this paper is to investigate the potential for calculation methods to determine the thermal resistance of a wall system containing vacuum insulation panels (VIPs) that has been experimentally characterised using a guarded hot box (GHB) apparatus. The VIPs used in the wall assembly have not been characterised separately to the wall assembly, and therefore exact knowledge of the thermal performance of the VIP including edge effect is not known. The calculations and simulations are completed using methods found in literature as well as manufacturer published values for the VIPs to determine the potential for calculation and simulation methods to predict the thermal resistance of the wall assembly without the exact characterisation of the VIP edge effect. The results demonstrate that disregarding the effect of VIP thermal bridges results in overestimating the thermal resistance of the wall assembly in all calculation and simulation methods, ranging from overestimates of 21% to 58%. Accounting for the VIP thermal bridges using the manufacturer advertised effective thermal conductivity of the VIPs resulted in three methods predicting the thermal resistance of the wall assembly within the uncertainty of the GHB results: the isothermal planes method, modified zone method and the 3D simulation. Of these methods only the 3D simulation can be considered a potential valid method for energy code compliance, as the isothermal planes method requires too drastic an assumption to be valid and the modified zone method requires extrapolating the zone factor beyond values which have been validated. The results of this work demonstrate that 3D simulations do show potential for use in lieu of guarded hot box testing for predicting the thermal resistance of wall assemblies containing both VIPs and steel studs. However, knowledge of the VIP effective thermal conductivity is imperative to achieve reasonable results.

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 Experimental and numerical investigation of thermal bridging effects of jointed Vacuum Insulation Panels

2016 ◽  
Vol 111 ◽  
pp. 164-175 ◽  
Author(s):  
Alice Lorenzati ◽  
Stefano Fantucci ◽  
Alfonso Capozzoli ◽  
Marco Perino
Keyword(s):  
Numerical Investigation ◽  
Vacuum Insulation ◽  
Thermal Bridging
Sign in / Sign up

Export Citation Format

Share Document