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

The core material contributes ?40% of the total cost a fumed silica based vacuum insulation panel (VIP). Expanded perlites, which come at approximately one-tenth current price silica, have been identified as potential candidates. Though, characteristic properties i.e. evacuated thermal conductivity and half pressure value expanded perlites are not suitable for most applications, these can be improved by altering their structural like particle size, pore porosity etc. during manufacture. knowledge relationship between perlite is key to develop performance VIPs. In present work, it has found that cores lies conductivities two regular packing orders – simple cubic hexagonal close packing. Owing complex geometries involved, beds arranged in structures was numerically calculated using finite element method. dependence on five parameters (particle intra-particle porosity, internal gas contact ratio) observed correlated with existing studies literature. model also validated experiments performed perlite. developed framework employed produce bespoke cost-effective systems.