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Analysis of Thermal Diffusivity Evaluation under Transient Conditions for Powder Insulations

  • B. L. Knight
  • K. D. Timmerhaus
  • R. H. Kropschot
Conference paper
Part of the Advances in Cryogenic Engineering book series (ACRE, volume 18)

Abstract

When an insulated vessel at ambient temperature is filled with a cryogenic liquid, considerable time elapses before the rate of heat transfer to the liquid reaches a steady-state value. Thus, the design of such vessels requires an analysis of the cooldown characteristics of the insulation which are governed by the thermal diffusivity of the insulating material. Blanks and Timmerhaus [1] have called attention to the fact that, although the steady-state heat leak can always be reduced by increasing the amount of insulation, the optimum design of a storage vessel for minimum liquid loss must consider the cooldown time because in many practical situations, e.g., transfer lines, the heat transfer process never reaches the steady-state condition.

Keywords

Heat Transfer Thermal Diffusivity Transient Condition Heat Transfer Process Storage Vessel 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. 1.
    R. F. Blanks and K. D. Timmerhaus, in: Advances in Cryogenic Engineering, Vol. 5, Springer Science+Business Media New York (1960), p. 3.Google Scholar
  2. 2.
    R. H. Kropschot, B. L. Knight, and K. D. Timmerhaus, in: Advances in Cryogenic Engineering, Vol. 14, Springer Science+Business Media New York (1969), p. 224.Google Scholar
  3. 3.
    R. L. Zollars, M.S. Thesis, University of Colorado, Boulder, Colorado (1972).Google Scholar
  4. 4.
    B. L. Knight, R. L. Zollars, R. H. Kropschot, and K. D. Timmerhaus, to be published in ASHRAE J.Google Scholar
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    H. S. Carslaw and J. C. Jaeger, Conduction of Heat in Solids, Oxford University Press, London (1959), p. 223.Google Scholar
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    R. S. Collier, unpublished work, NBS, January 1972.Google Scholar
  7. 7.
    P. M. Morse and H. Feshbach, Methods of Theoretical Physics, McGraw-Hill, New York (1953), p. 439.Google Scholar
  8. 8.
    B. L. Knight, Ph.D. Thesis, University of Colorado, Boulder, Colorado (1969).Google Scholar

Copyright information

© Springer Science+Business Media New York 1973

Authors and Affiliations

  • B. L. Knight
    • 1
  • K. D. Timmerhaus
    • 2
  • R. H. Kropschot
    • 2
  1. 1.Marathon Oil CompanyLittletonUSA
  2. 2.University of ColoradoBoulderUSA

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