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Thermodynamic optimization of insulation systems for cryogenic tanks.

Author(s) : BISIO G., CARTESEGNA M., TAGLIAFICO L. A.

Summary

A way to reduce energy consumption in cryogenic applications is the use of heat intercepts, which change the heat flux and temperature distribution inside the thermal insulation. In the work, the thermodynamic (second law) optimization of the location of heat intercepts is numerically performed in the specific case of liquid helium storage, in order to achieve global entropy generation minimization for the thermal insulation system. Numerical results are reported for plane, cylindrical and spherical geometry with one single (boiling nitrogen at 77 K) heat intercept and with a double thermal shield (boiling nitrogen at 77 K and boiling neon at 27 K). Best locations are calculated for the given working temperatures of the shields. The paper shows that the optimization outcomes are effective and robust, that is the global system performance is not sensitive to the exact locations of the shields, and can be applied with similar enhancements in performance to all the geometries.

Details

  • Original title: Thermodynamic optimization of insulation systems for cryogenic tanks.
  • Record ID : 2006-2168
  • Languages: English
  • Source: Cryogenics and refrigeration. Proceedings of ICCR 2003.
  • Publication date: 2003/04/22

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