Structural and thermal analysis of dewar supports for low boil-off long duration storage of cryogenic liquids

Design of a cryogenic liquid-storage system for various applications is unique and hence, is still an evolving field of research and development as newer applications of cryogens are being envisaged. The conventional way of storing cryogenic liquid is the use of dewars, which are double walled containers using evacuated insulation materials to reduce heat in leak from the ambient. Design of the dewar support system to store and transport cryogenic liquids on a mobile platform poses considerable challenge. The present study lays the foundation for addressing a long duration storage of cryogenic liquid under very high-stress levels. The study involves the evaluation of the structural and thermal performances of such vessels in order to ensure structural stability of the vessel while allowing minimal boil off loss of the stored cryogenic fluid. A FEM based numerical study is underway to compare support systems in terms of the stresses, and heat inleak.