RCAIDE.Library.Attributes.Materials.Vacuum_Jacketed_Multilayer_Insulation

Vacuum_Jacketed_Multilayer_Insulation

class Vacuum_Jacketed_Multilayer_Insulation(*args, **kwarg)

Bases: Solid

A class representing Vacuum Jacketed Multilayer Insulation (VGMLI) material properties. VGMLI is an advanced cryogenic insulation technology that combines vacuum gaps with multilayer reflective barriers to minimize conductive and radiative heat transfer.

density

Effective bulk density in kg/m³ (80).

Type:

float

thermal_conductivity

Effective heat conduction coefficient in W/(m·K) (0.0003).

Type:

float

specific_density

Relative density compared to water (1.1).

Type:

float

specific_heat_capacity

Specific heat at constant pressure in J/(kg·K). Not explicitly set here.

Type:

float

Notes

Vacuum Jacketed Multilayer Insulation (VGMLI) is widely used in aerospace for liquid hydrogen storage, cryogenic tanks, and space vehicle insulation. By integrating vacuum layers with multilayer insulation, VGMLI achieves extremely low thermal conductivity, making it one of the most effective cryogenic insulators.

Unlike structural materials, VGMLI is not intended to bear significant mechanical loads; its primary purpose is thermal protection.

Definitions

‘Vacuum Jacketed Multilayer Insulation (VGMLI)’

A thermal insulation system that integrates vacuum gaps with multilayer reflective insulation to reduce conductive and radiative heat transfer.

‘Thermal Conductivity’

The property of a material to conduct heat, measured in watts per meter-kelvin.