EXPERIMENTAL STUDY ON THE FACTORS AFFECTING THE INSULATION PERFORMANCE OF FLAME-RETARDANT MULTILAYER INSULATION MATERIALS

Flame-retardant multilayer insulation materials act as effective thermal blankets of cryogenic containers that store flammable and explosive liquids. This study used standard static liquid nitrogen boil-off calorimetry to test the performance eight groups flame-retardant with different wrapping parameters. The effects four factors, namely layer density, seaming process, number reflector layer, variable-density arrangement, on were analysed. Three densities considered: 4.47, 3.08, 2.50 layers/mm. Two types processes discussed: overlapped fold-over processes. numbers layers 60, 70, 80. arrangements similar thicknesses 10-10-40 20-20-20 reflectors allocated for low-, medium- high-density segments. conclusions are follows: Decreasing density enhances insulation; Using process results in less heat flux lower apparent conductivity; An increase weakens radiative transfer, resulting better Furthermore, a given thickness, reducing appropriately low- medium-density segments improves performance; Optimizing controlling each segment also essential effects. provides supporting theories reference data practical engineering applications.