Investigating the effect of metal-polymer internal support on reducing the heat transfer rate of mobile cryogenic vessel
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ORIGINAL
Investigating the effect of metal-polymer internal support on reducing the heat transfer rate of mobile cryogenic vessels Vahid Norouzifard 1
&
Seyed Meysam Hosseini 2 & Ebrahim Alizadeh 3
Received: 28 December 2019 / Accepted: 24 August 2020 # Springer-Verlag GmbH Germany, part of Springer Nature 2020
Abstract In this paper, a new composite support made of steel and polymer is proposed for the internal supports of mobile cryogenic vessels. Multilayered design of the steel part in the presented support controls the heat transfer through this part by adding more thermal contact resistance (TCR) to the heat flow path. An analytical model is developed to calculate TCR between layers of the steel part at the support working pressure and temperature condition. A finite element (FE) model is also developed for the proposed support. Thermo-mechanical coupled and transient thermal analysis are performed on the FE model by ANSYS FE code to investigate heat transfer in the polymer and steel parts of the proposed composite support and a support made of polymer block. The effects of dynamic loading frequency and damping on the heat flux passing through the internal support are investigated for the new support design. Comparison of the heat flux results shows that the amount of heat transferred to the cryogenic tank through the internal supports decreases when using proposed composite design instead of polymer blocks not only in the static loading condition but also in the dynamic loading. Keywords Cryogenic tank . Internal support . Thermo-mechanical analysis . Conductivity . Thermal contact resistance
1 Introduction Cryogenic fluids are liquids from condensation of gases with boiling point less than −150 °C. One of the problems with the storage of cryogenic liquids is their very low critical temperature relative to the ambient temperature, which makes it necessary to deal with the problem of thermal leakage to the storage site. The most common type of tanks for storing or transporting high-volume cryogenic liquids include internal and external vessels with the vacuum space between filled with insulating materials such as perlite, silica aerogel, phenolic balls and etc. The outer shell acts as a support and protection for the inner vessel. The internal reservoir is supported within the external vessel by internal supports such as bars, * Vahid Norouzifard [email protected] 1
Department of Mechanical Engineering, Jundi-shapur University of Technology, P.O.B. 64615334, Dezful, Iran
2
Department of Mechanical Engineering, Babol Noshirvani University of Technology, Babol, Iran
3
Fuel cell Technology Research laboratory, Malek Ashtar University of Technology, Fereydoonkenar, Iran
cables, chains or blocks made of steel, polymer or composite materials. The internal support system must have sufficient strength to withstand weight of the inner vessel, and accidental vertical and lateral acceleration, which in this study is considered the equivalent force of 3 g acceleration in all directions. The internal supports
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