Why and which opacifier for perlite based vacuum insulation panels (VIPs) in the average temperature range of 10-70 °C

Article Thermodynamics

Predicting the conductive heat transfer through evacuated perlite based vacuum insulation panels

Sankarshan Verma et al.

Summary: Expanded perlites have been identified as potential core material candidates for vacuum insulation panels due to their lower cost compared to fumed silica. By altering their structural properties, such as particle size and porosity, the insulation properties of expanded perlites can be improved. Numerical calculations using finite element method showed a correlation between the thermal conductivity of perlite cores and their packing structures, providing a framework for designing cost-effective thermal insulation systems.

INTERNATIONAL JOURNAL OF THERMAL SCIENCES (2022)

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Article Thermodynamics

Thermal conductivity and extinction coefficient of opacified expanded perlite for vacuum super insulation up to 1073 K

Matthias Rottmann et al.

Summary: A vacuum super insulation material has been developed for temperatures up to 1073 K, using high-density expanded perlite as the base material and opacifiers such as SiC. Experimental results show that a weight fraction of 40% SiC can achieve the most optimal thermal insulation performance with low radiative heat transfer.

INTERNATIONAL JOURNAL OF THERMAL SCIENCES (2021)

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Article Thermodynamics