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Title of Journal: Int J Thermophys

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Abbravation: International Journal of Thermophysics

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Springer US

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DOI

10.1002/bjs.1800820854

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1572-9567

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Trilobal Polyimide Fiber Insulation for Cryogenic

Authors: M Geisler J Wachtel F Hemberger T Schultz S Vidi HP Ebert
Publish Date: 2008/06/25
Volume: 29, Issue: 4, Pages: 1385-1394
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Abstract

Recent measurements have shown a recordbreaking low thermal conductivity λtotal of less than 025 × 10−3 W·m−1·K−1 at temperatures of 120 K for an evacuated sample consisting of polyimide fibers with a trilobal fiber cross section Existing models for the heat transport in fiber insulations cannot sufficiently describe fiber insulations consisting of fibers with noncylindrical cross sections In this article a modification for the model for cylindrical fibers will be presented The modifications for the trilobal cross section of the fiber will be explained and compared to the original cylindrical model The results of the theoretical calculations will be discussed in comparison to experimental results of measurements performed with a guarded hotplate apparatus at temperatures in the range from 120 K to 420 K

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  2. Measurements and Correlations of cis -1,3,3,3-Tetrafluoroprop-1-ene (R1234ze(Z)) Subcooled Liquid Density and Vapor-Phase PvT
  3. Comments on “The Apparent Thermal Conductivity of Liquids Containing Solid Particles of Nanometer Dimensions: A Critique” (Int. J. Thermophys. 36, 1367 (2015))
  4. Study on Reducing the Size-of-Source Effect of Pyrometers
  5. Radiative Properties of Gold Surfaces with One-Dimensional Microscale Gaussian Random Roughness
  6. Measurements of the Liquid Viscosities of Mixtures of n -Butane, n -Hexane, and n -Octane with Squalane to 30 MPa
  7. Development and Applications of Continuous-Wave Cavity Ring-Down Spectroscopy
  8. Correlation and Prediction of Dense Fluid Transport Coefficients. IX. Ionic Liquids
  9. Viscosity of nonelectrolyte liquid mixtures. III Binary mixtures of methyl methacrylate with hydrocarbons, haloalkanes, and alkylamines
  10. Thermal Radiation Phenomena of Surfaces of Chromium and Palladium in a High-Temperature Environment
  11. Comsol Simulations as a Tool in Validating a Measurement Chamber
  12. A Differential Temperature-Dependent Dielectric Relaxation Study of Organoclay Cloisite$$^{\mathrm{}}$$
  13. A Study of Some Thermophysical Parameters in Glassy $$\mathrm{{Se}}_{80}\mathrm{{Te}}_{20}$$ and $$\mathrm{{Se}}_{80}\mathrm{{Te}}_{10}\mathrm{{M}}_{10}$$Se80Te10M10 (Cd, In, and Sb) Alloys
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  15. Thermophysical Properties of Low-Density Pure Alkanes and Their Binary Mixtures Calculated by Means of an ( n -6) Lennard-Jones Temperature-Dependent Potential
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  17. A Study of the Flow through Capillary Tubes Tuned for a Cooling Circuit with Saturated Fluorocarbon Refrigerants
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  19. Thermal Changes of Maize Seed by Laser Irradiation
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  21. Absorption and Scattering Behavior of Nanofluids in the Visible Range
  22. Thermal Characterization of Carbon Nanotubes by Photothermal Techniques
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  26. Conductometric Study of Some Metal Halides in Glycerol + Water Mixtures
  27. Depth Profiling of Electronic Transport Properties in $$\mathrm{H}^{+}$$-Implanted n-Type Silicon
  28. Development of a Multiband near-to-far Infrared Radiance COmparator (MIRCO)
  29. Development of High-Temperature Blackbodies and Furnaces for Radiation Thermometry
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  32. Tight-Binding Investigation of Thermal Conductivity of Graphene and Few-Layer Graphene Systems
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