KF-e

eReference Springer Verlag

Variables

Variable 21 – Number of foils per unit thickness insulation

Fig. 4 - “Pseudo”- thermal conductivity, λ', of multifoil superinsulations, as a function of the number of foils, N, per unit thickness of insulation, D. The figure is from [1]. Curves 1- 3: aluminum foil with fiberglass paper of various thicknesses; Curve 4: vacuum-aluminized Dracon film with woven glass fabric, Curves 5 and 6: theoretical values (with no allowance for solid-contact conduction) calculated from ε_Foil = 0.04 and 0.12. Wall temperatures T ₁ = 293 K and T ₂ = 90 K.

Variable 24 – Compressive load

Fig. 5 - “Pseudo”- thermal conductivity, λ', of aluminium multifoil superinsulations, as a function of the compressive load, p. The figure is from [1]. Spacer materials for Curves 1 and 2: fiberglass paper of various thicknesses; for Curve 3: woven glass fabric, for Curve 4: perforated fiber-glass paper. Wall temperatures as in Fig. 4

Variable 43 – Number of selected gas

Number	Selected Gas	Formula
1	Air
2	Hydrogen	H₂
3	Nitrogen	N₂
4	Oxygen	O₂
5	Helium	He
6	Neon	Ne
7	Argon	Ar
8	Krypton	Kr
9	Xenon	Xe
10	Carbon dioxide	CO₂
11	Carbon monoxide	CO
12	Steam	H₂O

Variable 55 – Number of selected insulation material

Number	Material
Nontransparent insulations
1	Fumed Silicia + 16% Fe₃O₄
2	Pure boron silicate glass fibres, d=3 to 5 μm
3	Fibre glass bonded mats, d=14 μm
4	Fiberal (Al₂O₃fibres), d=5 to 10 μm
5	Boron silicate glass fibres + 30% Fe₃O₄
6	Boron silicate glass fibres + 3% Fe₃O₄
7	Polyesterfasern, d= 40 μm
8	Polyester fibres, d= 26 μm
9	Polyester fibres, d= 16 μm
11	Polypropylene fibres, d=20 μm, pure
12	Polypropylene fibres, d=20 μm, vacuum metallized with 0,05 μm Al
13	Polypropylene fibres, d=20 μm, vacuum metallized with 0,10 μm Al
Insulation with transparent zones
10	Silicia-Aerogel, ρ ≤ 125 kg/m³, T₁ ≤ 300 K

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