LNG storage tank is one of the most important and expensive devices for LNG terminals.The process of pre-cooling the LNG storage tank is the most critical and most dangerous debugging session.Based on the principle of gas-liquid two-phase volume node
the large-scale LNG storage tank pre-cooling dynamic simulation model was established.Taking a 160000 m3 LNG tank as an example
the time required for the pre-cooling process and the total used LNG for the tank pre-cooling were computed and the pressure of the LNG storage tank
the amount of BOG generation and the temperature of the tank during the pre-cooling process were determined with the established dynamic model.The optimization of the pre-cooled process design for a large-scale LNG storage tank was provided in a theoretical basis.