Mechanical and Thermal Properties of Composite Material and Insulation for a Single Walled Tank for Cryogenic Liquids

Philipp W. Kutz*, Frank Otremba and Jan Werner

Bundesanstalt für Materialforschung und-prüfung (BAM), Berlin, 12205, Germany

Adv. Mater. Lett., 2020, 11 (1), 20011457 (1-6)

DOI: 10.5185/amlett.2020.011457

Publication Date (Web): Dec 07, 2019

E-mail: philipp-werner.kutz@bam.de

Abstract


This paper describes the testing methods used to determine the thermal properties of insulation materials and mechanical properties of materials used for the load-bearing structure for pressure tanks (up to 4 bar, relative) and cryogenic liquids (LNG, −166 °C to -157 °C at atmospheric pressure). Goal is to design a transportation tank that does not exceed 4 bars (relative) within 10 h, starting at atmospheric pressure. PUR-foam is a suitable material for the insulation. A 12,5 l small scale tank prototype reached 4 bar (relative) within 87 minutes, which is, regarding the influence of the size, a satisfying result. The mechanical properties change significantly at cryogenic temperatures. The bending modulus is similar at first, but decreases at a certain point by appr. 50 %. However, the maximum stress is much higher and could not be reached within this testing setup. 

Keywords

Glass fiber reinforced polymer, cryogenic liquids, liquefied natural gas, transportation tanks.

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