System and method of de-bottlenecking LNG trains

A system for producing liquefied natural gas (LNG) from a natural gas stream, comprising:

• a first LNG train configured to liquefy a first portion of the natural gas stream to generate
• a first warm LNG stream in a first operating mode, and
• a first cold LNG stream in a second operating mode;
• a second LNG train configured to liquefy a second portion of the natural gas stream to generate
• a second warm LNG stream in the first operating mode, and
• a second cold LNG stream in the second operating mode;
• and
• a sub-cooling unit in fluid connection with the first LNG train and the second LNG train, wherein the sub-cooling unit is configured to, in the first operating mode, sub-cool the first warm LNG stream and the second warm LNG stream to generate a first cold LNG stream in the first operating mode and a second cold LNG stream in the first operating mode;
• wherein the first and second warm LNG streams have a higher temperature than a temperature of the first and second cold LNG streams in the second operating mode;
• and
• wherein the first and second cold LNG streams, in the first operating mode, have a higher combined flow rate than the combined flow rate of the first and second cold LNG streams in the second operating mode.