Rob
Forum Moderator

It's been a while since I last modelled that sort of thing - there's an article where we modelled a dummy LNG plant to highlight some of the potential issues with the units. 

You need to start with the basics, so have a look in Learning for the geometry, meshing and solver settings. Also have a think on how you want to handle the fan flow, HX units etc: have a look for 

Hot Air Dispersion on an Air-Cooled Gas Liquefaction PlantÂ