Superinsulation: Total thickness 10-50 mm, Density 5-20 kg/m³

Q: What is the primary advantage of superinsulation over conventional insulation?

Superinsulation achieves thermal conductivities 10-100 times lower than conventional foam or fiberglass insulation through the combined effect of multiple radiation barriers and high vacuum, significantly reducing boil-off losses in cryogenic storage.

Q: How many layers are typically used in superinsulation systems?

Commercial superinsulation systems typically contain 30-100 alternating layers of radiation shields and spacers, with optimal performance achieved through careful balancing of layer count, material selection, and vacuum quality.

Q: What maintenance is required for superinsulation systems?

Superinsulation requires periodic vacuum integrity checks (typically annually), visual inspection for physical damage during vessel openings, and potential re-evacuation if vacuum levels degrade beyond specified limits.

Component Specifications

Definition

Superinsulation is a specialized thermal insulation component used in cryogenic storage vessels, consisting of multiple alternating layers of highly reflective radiation shields and low-conductivity spacer materials arranged in high-vacuum environments to minimize heat transfer through radiation, conduction, and convection, enabling long-term storage of cryogenic fluids with minimal boil-off losses.

Working Principle

Operates on the principle of combined heat transfer suppression: 1) Multiple reflective layers (typically aluminum or gold-coated polymer films) reduce radiative heat transfer through successive reflection, 2) Low-conductivity spacer materials (glass fiber, polyester, or ceramic papers) separate layers to minimize solid conduction, 3) High vacuum environment (typically <10^-3 mbar) eliminates gaseous conduction and convection, achieving thermal conductivities as low as 0.0001 W/m·K.

Materials

Radiation shields: Aluminum-coated polyester (PET) films (12-25 μm thickness, 0.03-0.05 emissivity), Gold-coated polyimide films for extreme applications; Spacer materials: Glass fiber paper (10-50 gsm), Polyester non-woven fabric, Silica aerogel-infused materials; Edge sealing: Butyl rubber or epoxy-based barriers; Support structures: Polyimide or fiberglass reinforced frames.

Technical Parameters

Parameter	Typical range	Notes & selection driver
Density	5-20 kg/m³
Layer Count	30-100 alternating layers
Vacuum Level	<10^-3 mbar
Total Thickness	10-50 mm
Radiation Heat Flux	<1 W/m² at 77K
Compressive Strength	0.5-5 kPa
Thermal Conductivity	0.0001-0.0005 W/m·K
Operating Temperature	-269°C to 100°C

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Standards

ISO 21014:2019, DIN 28400-2, ASTM C177, EN 14314

Parent Products

This component is used in the following industrial products

Cryogen Storage Vessel

A specialized container designed to store cryogenic liquids at extremely low temperatures within a cryogenic injection system.

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Engineering Analysis

Risks & Mitigation

Vacuum degradation over time
Mechanical damage during installation/maintenance
Radiation shield oxidation
Spacer material compression
Thermal bridging at penetrations

FMEA Triads

Trigger: Vacuum system leakage
Failure: Increased thermal conductivity leading to excessive boil-off
Mitigation: Regular vacuum monitoring, redundant sealing systems, helium leak testing during maintenance

Trigger: Mechanical compression during installation
Failure: Reduced insulation performance due to increased solid conduction
Mitigation: Proper installation procedures, use of compression-resistant spacers, installation training programs

Trigger: Radiation shield degradation
Failure: Increased radiative heat transfer
Mitigation: Use of corrosion-resistant coatings, controlled atmosphere during manufacturing, regular infrared inspection

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

Layer alignment ±1 mm, Vacuum level ±10% of specification, Thermal conductivity ±15% of rated value

Test Method

Guarded hot plate method (ASTM C177), Heat flux measurement, Vacuum integrity testing (helium mass spectrometry), Cryogenic boil-off testing

Procurement Evaluation Criteria

A practical evidence checklist for RFQ preparation and supplier evaluation.

Technical documentation

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Manufacturing capability

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Inspection readiness

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Supplier transparency

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Manufacturers of Superinsulation

Manufacturer profiles associated with Superinsulation.

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Frequently Asked Questions

What is the primary advantage of superinsulation over conventional insulation?