Gas liquefaction systems and methods

A liquefaction process, comprising:

• receiving, by a first pass of a first heat exchanger, an incoming feedstock;
• outputting, from the first pass of the first heat exchanger, a vapor stream derived from the incoming feedstock;
• flashing the vapor stream derived from the incoming feedstock to a mixed-phase stream at a first pressure;
• separating the mixed-phase stream into a first stream and a second stream;
• passing the second stream through a second heat exchanger;
• splitting the second stream downstream from the second heat exchanger into a first portion and a second portion;
• directing the first portion of the second stream as a liquid natural gas (LNG) product to a storage facility;
• mixing a second portion of the second stream with a boil-off gas that exits the storage facility to form a mixed stream;
• introducing the mixed stream into a compression unit, the compression unit comprising a first compression circuit and a second compression circuit, each of the first and second compression circuits including a compressor;
• compressing the mixed stream from the second pressure to a third pressure;
• expanding the mixed stream from the third pressure to the first pressure;
• and
• re-introducing the mixed stream at the first pressure into the compression unit, wherein the first pressure corresponds with suction pressure internal to the compression unit.