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Advances in Mechanical Engineering
Volume 2013 (2013), Article ID 421681, 17 pages
http://dx.doi.org/10.1155/2013/421681
Research Article

Comparison of Heat Insulations for Cryogenic Tankers Using Analytical and Numerical Analysis

1Department of Design and Manufacturing, University of Zaragoza, 50017 Zaragoza, Spain
2Department of Mechanical Engineering, University of Zaragoza, 50017 Zaragoza, Spain

Received 15 May 2013; Accepted 26 June 2013

Academic Editor: Magd Abdel Wahab

Copyright © 2013 Ramón Miralbés Buil and David Valladares Hernando. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

This paper presented a methodology for the design of heat insulations used in cryogenic tankers. This insulation usually comprises a combination of vacuum and perlite or vacuum and superinsulation. Concretely, it is a methodology to obtain the temperatures, heat fluxes, and so forth. Using analytical tools has been established, which is based on the equivalence with an electric circuit, and on numerical tools using finite elements. Results obtained with both methods are then compared. In addition, the influence of the outer finish of the external part, due to the effect of the solar radiation, is analyzed too, and the equations to determine the maximum time available to transport the cryogenic liquid have been established. All these aspects are applied to a specific cryogenic commercial vehicle.