상용 LNG저장탱크용 Membrane설계 개념 연구

Korea Gas Corporation(KOGAS) had successfully developed and built a pilot Liquefied Natural Gas(LNG) storage tank(membrane type above ground tank having a capacity of 1,000㎥). Through the development and operation of the pilot LNG storage tank, KOGAS had developed membrane for the commercial LNG storage tank having a capacity of 140,000㎥ For the development of commercial membrane, analytical and experimental studies had been performed to investigate the strength of the commercial membrane and the reaction force at the anchor point. The stress analysis of the corrugated membrane shapes which are subjected to the cryogenic liquid pressure and thermal loading was performed to ensure the stability and fatigue strength of the commercial membrane by using nonlinear FEM code and experiments. On the basis of engineering and experimental data obtained from the pilot LNG storage tank, this paper is focus on the general design process of commercial membrane units.