The Performance of a Double-Guarded Cold-Plate Thermal Conductivity Apparatus
- 276 Downloads
The insulating effectiveness of multilayer insulations and the influence of different physical conditions on their performance are of prime importance in the use of liquid hydrogen in future space missions. To better define the problems associated with the storage of liquid propellants in space  we are investigating a number of variables which influence the thermal performance of the multilayer insulations. Considering the conditions under which these insulations may be used, the effects of the following variables on their thermal con« ductivity are of particular interest: (1) boundary temperatures; (2) gas pressure; (3) gas type; (4) mechanical load; (5) number of shields and thickness; and (6) thermal shorts and discontinuities.
KeywordsRadiation Shield Cold Plate Cryogenic Liquid Measuring Vessel Copper Ring
Unable to display preview. Download preview PDF.
- 1.A. A. Fowle, “Estimation of Weight Penalties Associated with Alternate Methods for Storing Cryogenic Propellants in Space,” Contract No. NAS5–664, Report No. 63270–11-01 (May 1962).Google Scholar
- 2.G. Wilkes, Heat Insulation, John Wiley and Sons, Inc., New York (1950).Google Scholar
- 3.I. A. Black, A. A. Powle, and P. E. Glaser, “Single-Plate Apparatus for Tests of Low-Temperature Thermal Conductivity,” Proceedings, Tenth International Congress of Refrigeration, International Institute of Refrigeration, Paris (1959).Google Scholar
- 4.ASTM Designation: C420–62T, “Thermal Conductivity of Insulating Materials at Low Temperatures by Means of the Wilkes Calorimeter.”Google Scholar
- 5.I. A. Black, P. R. Doherty, P. E. Glaser, and M. Mellner, “Effectiveness of Evacuated Multiple-Layer Insulations,” Proceedings, Eleventh International Congress of Refrigeration, International Institute of Refrigeration, Munich, August 1963 (to be published).Google Scholar
- 6.Quarterly Reports, Nos. 63270–00-06, 65008–00-01, 65008–00-02, NASA Contract No. NASw-615.Google Scholar
- 7.J. D. Verschoor and P. Greebler, Trans. ASME, 74, 961 (1952).Google Scholar
- 8.M. P. Hnilicka, Advances in Cryogenic Engineering, Vol. 5, Plenum Press, New York (1960), p. 199.Google Scholar
- 9.R. J. Roark, Formulas for Stress and Strain, McGraw-Hill Book Co., New York (1954).Google Scholar