Fumed Silica Vacuum Insulation Panel Refrigerator

How are VIPs built? A Vacuum Insulation Panel consists of a rigid, highly-porous core material encased in a thin, gas-tight outer envelope. The envelope is evacuated and sealed to prevent outside gases from entering the panel. The combination of porous material and the vacuum results in an extremely high thermal resistance. The thermal resistance allows for thinner insulation in applications where space is at a premium.   Core materials for VIPs Core Materials for VIPs require a completely open-porous structure to allow evacuation. These materials must have a sufficiently high compressive strength to withstand the mechanical pressure load. Core material classes basically comprise three structures as microporous powders, fibres and foams.   Optimum materials have a microporous structure and are able to absorb humidity. Otherwise, getters have to be added. The most common core materials are fumed silica and glass fibres. In a few cases open-cell polymer foam…

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