Characteristics and Applications of Some Superinsulations
When we began, about 8 years ago, to work specifically on exceedingly high-quality insulations, the best commercially available insulating systems consisted of powders such as perlite or Santocel in vacuum, having an apparent thermal conductivity of approximately 1 · 10-3 Btu/hr-ft- °F between -300 and 70°F. Of the three modes of heat transport in these vacuum insulations, gaseous conduction, because of the very fine particulate size of the subject powders, is ail but eliminated, even at moderate vacuums. The remaining problem was then one of minimizing the other two modes, solid conduction and radiation.
KeywordsLiquid Oxygen Solid Conduction Transport Container Vacuum Insulation Cryogenic Fluid
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