Non-Isothermal Sloshing in Marine Liquefied Natural Gas Fuel Tanks

摘要

Liquefied Natural Gas (LNG) has proven to be a promising alternative fuel. However, storing and handling cryogenic liquids onboard ships offer some operational challenges. This paper presents investigations of the pressure and temperature change in a cryogenic pressure vessel. The tank is of similar shape as a marine liquefied natural gas (LNG) fuel tank, but the test medium is liquefied nitrogen (LIN). By using amotion platform, the sloshing enhanced pressure change in the tank is studied. Important factors are the type of sloshing regime and the degree of subcooled liquid. To investigate the sloshing regimes, a tank with a transparent glass is also tested using water and air. The preliminary results from the experiments confirm that sloshing, as well as the lower temperature of the liquid relative to the saturation temperature, has a significant influence on the pressure.